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Basler BE1-CDS220 Instruction Manual

Current differential system
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Table of Contents

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INSTRUCTION MANUAL
FOR
CURRENT DIFFERENTIAL SYSTEM
BE1-CDS220
D2857-19
08-18-00
Publication:
9313900990
Revision:
B
01/06

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Summary of Contents for Basler BE1-CDS220

  • Page 1 INSTRUCTION MANUAL CURRENT DIFFERENTIAL SYSTEM BE1-CDS220 D2857-19 08-18-00 Publication: 9313900990 Revision: 01/06...
  • Page 3 INTRODUCTION This instruction manual provides information about the operation and installation of the BE1-CDS220 Current Differential System. To accomplish this, the following information is provided: • General information, specifications, and a Quick Start guide. • Functional description and setting parameters for the inputs and outputs, protection and control functions, metering functions, and reporting and alarm functions.
  • Page 4 First Printing November 1999 Printed in USA © 1999, 2000, 2006 Basler Electric, Highland, Illinois 62249 USA All Rights Reserved January 2006 CONFIDENTIAL INFORMATION OF BASLER ELECTRIC COMPANY, HIGHLAND, IL. IT IS LOANED FOR CONFIDENTIAL USE, SUBJECT TO RETURN ON REQUEST, AND WITH THE MUTUAL UNDERSTANDING THAT IT WILL NOT BE USED IN ANY MANNER DETRIMENTAL TO THE INTEREST OF BASLER ELECTRIC COMPANY.
  • Page 5 Minor software enhancements. 1.14.10/11-05 Removed write capability from some Modbus registers. 1.14.09/07-05 Improved LCD display. 1.14.08/09-03 Added diagnostics for in-house testing. 1.14.07/08-03 Corrected the harmonic sharing inhibit problem. Enhanced breaker operations counter. Corrected cal defaults loaded problem when upgrading firmware. BE1-CDS220 Introduction...
  • Page 6 Added Mode 6, Latching Timer to 62 timer functions. Added DNP 3.0 Protocol. Added a feature for the demand recording function to allow the user to select block average or sliding block average calculation method in addition to the existing thermal calculation method. Introduction BE1-CDS220...
  • Page 7 Improved RS-485 communications when slow baud rates are used. Improved front panel display. P/05-02 Added labeling to back of case. Added RTV to ‘s’ wire of T1 to prevent hipot failure. N/06-01 Improved low-frequency filtering on LCD. M/03-01 Relocated P2 on magnetics board. BE1-CDS220 Introduction...
  • Page 8 Changed the manual organization from two volumes to one volume in a loose leaf binder with tabs to separate the manual sections. Added Revision History to the Introduction, and CE qualification, UL recognition, CSA certification, and DNP 3.0 certification. Added drawings and minor corrections to all sections. −/11-99 Initial release. Introduction BE1-CDS220...

  • Page 9: Table Of Contents

    SECTION 12 Installation ..................12-1 SECTION 13 Testing and Maintenance ..............13-1 SECTION 14 BESTCOMS Software ...............14-1 APPENDIX A Time Overcurrent Characteristic Curves..........A-1 APPENDIX B Command Cross-Reference .............. B-1 APPENDIX C Terminal Communications..............C-1 APPENDIX D Settings Calculations................D-1 BE1-CDS220 Introduction...
  • Page 10 This page intentionally left blank. viii Introduction BE1-CDS220...

  • Page 11: General Information

    Display............................. 1-21 Isolation ............................1-21 Surge Withstand Capability ......................1-21 Radio Frequency Interference (RFI) ....................1-21 Electrostatic Discharge (ESD)......................1-21 UL Recognition..........................1-21 C.S.A. Certification .......................... 1-22 CE Qualified ............................ 1-22 GOST-R Certification ........................1-22 DNP Certification..........................1-22 BE1-CDS220 General Information...
  • Page 12 Figure 1-6. Three-Phase Connections, Delta-Wye Configuration, Internal Phase Compensation ..1-11 Figure 1-7. Traditional Zero-Sequence Trap for Application with Ground Banks ........1-13 Figure 1-8. Style Number Identification Chart..................1-15 Figure 1-9. Typical 87 Response Characteristic Curves ................. 1-17 Tables Table 1-1. Control Input Burden....................... 1-21 General Information BE1-CDS220...

  • Page 13: Input And Output Functions

    Transient Data Exchange) files and Basler UMOS (Utilities Management Operating System) files captured by the Basler Electric multifunction relays. This software is available free of charge through the web site at http://www.basler.com or Customer Service at the Highland, Illinois manufacturing facility.

  • Page 14: Protection And Control

    One breaker failure protection function block is assignable to any of the current input circuits. • The current circuit assigned to the breaker failure function block also determines which current circuit is used by the breaker monitoring functions described later. General Information BE1-CDS220...

  • Page 15: Metering

    A current check record is generated when this occurs and the diagnostic function will indicate the possible source of the mismatch: for example, incorrect or missing phase compensation. BE1-CDS220 General Information...

  • Page 16: Bestlogic Programmable Logic

    Each independent function block has all of the inputs and outputs that the discrete component counterpart might have. Programming BESTlogic General Information BE1-CDS220...

  • Page 17: Security

    Human-Machine Interface • Each BE1-CDS220 comes with a front panel display with LED indicators for power, relay trouble alarm, minor alarm, major alarm, and trip. Each BE1-CDS also comes with the software application program BESTCOMS-CDS220-16. This program is a user friendly, Windows® based program that makes relay setup and support very easy.

  • Page 18: Primary Applications

    Thus for higher levels of restraint current, where the CTs may be subject to saturation, higher levels of differential current must be seen to cause a trip. The percentage restraint is often called the slope characteristic. General Information BE1-CDS220...

  • Page 19: Problem 2: Measured Current Magnitude Mismatch

    CTs. Finally, Basler Electric addresses the source of false differential current at its roots. Active CT technology used on the current inputs provides low burden to extend the linear range of power system CTs and wide dynamic range to reduce measurement errors at high current levels.

  • Page 20: Problem 3: Mismatch Caused By Load Tap Changers

    Figure 1-3. Currents on Different Voltage Bases BE1-CDS220 Solution: The BE1-CDS220 relay applies a tap adjustment factor to the measured currents to cancel the effect of dissimilar CT ratio and voltage bases by converting the currents to per unit quantities on a common base.

  • Page 21: Problem 4: Phase Angle Shift

    CT performance. The BE1-CDS220 relays support the traditional solution so that they may be used in retrofit/modernization projects. However, in a numerical relay, it is possible to connect all of the CTs in wye as shown in Figure 1-6 so that the above mentioned drawbacks are not a consideration.

  • Page 22: Figure 1-4. Delta/Wye Transformer Currents

    =Phase A, wye winding current D2837-12 =Phase A, delta winding current 02-26-03 =Phase B, delta winding current =Phase B, wye winding current =Phase C, delta winding current =Phase C, wye winding current Figure 1-4. Delta/Wye Transformer Currents 1-10 General Information BE1-CDS220...

  • Page 23: Figure 1-5. Three-Phase Connections, Delta-Wye Configuration, Ct Compensation

    D2837-19.vsd to connect the ground to a lead connected to terminal B10, 12, or 14. 02-03-99 Figure 1-5. Three-Phase Connections, Delta-Wye Configuration, CT Compensation BE1-CDS D2837-20.vsd 02-03-99 Figure 1-6. Three-Phase Connections, Delta-Wye Configuration, Internal Phase Compensation BE1-CDS220 General Information 1-11...

  • Page 24: Problem 5: Zero Sequence Current Sources Within The Zone Of Protection

    This application is greatly simplified with the BE1-CDS220. The user can connect all CTs in wye and specify that the delta transformer winding has a ground source. The BE1-CDS220 will apply delta compensation to the wye winding to obtain phase shift and zero sequence compensation for that current input.

  • Page 25: Problem 6: Transformer Energization Inrush And Overexcitation

    NOTE The BE1-CDS220 relay does not automatically remove the zero sequence components from all currents presented to the differential protection functions as that can unnecessarily reduce the relay’s sensitivity to internal ground faults by 33%.

  • Page 26: Problem 7: Digital Measurement Errors

    Generator and motor differential protection applications are another situation where accuracy across a wide frequency range is important. To eliminate the errors introduced by analog low pass filters, the BE1-CDS220 uses digital signal processing technology and 144 samples per cycle over-sampling to provide digital low-pass filtering.

  • Page 27: Sample Style Number

    Sample Style Number The style number identification chart (Figure 1-8) defines the electrical characteristics and operational features included in BE1-CDS Relays. For example, if the style number were BE1-CDS220- E0EN0YYONOR, the device would have the following: BE1-CDS220 Three-phase two input...

  • Page 28: Calculated Values And Accuracy

    ±3% or ±75 mA, whichever is greater 1 A Current Sensing: ±3% or ±25 mA, whichever is greater Response Time (See Figure 1-9) : <1 cycle at 5 times pickup <2 cycles at 1.5 times pickup 1-16 General Information BE1-CDS220...

  • Page 29: 87Nd Neutral Differential Function

    5 A Current Sensing: ±4% or ±75 mA 1 A Current Sensing: ±4% or ±25 mA 5 A Current Sensing Range: 2.00 to 20.0 A Increment: 0.01 from 2.00 to 9.99, 0.1 from 10.0 to 20.0 BE1-CDS220 General Information 1-17...

  • Page 30: Time Overcurrent Functions

    ±3% or ±15 mA Current Pickup Ranges (#50T) 5 A Current Sensing Range: 0.5 to 150.0 A Increment: 0.01 from 0.50 to 9.99 A 0.1 from 10.0 to 99.9 A 1.0 from 100A to 150 A 1-18 General Information BE1-CDS220...

  • Page 31: Breaker Failure (Bf)

    5 A Current Sensing: ±2% or ±50 mA 1 A Current Sensing: ±2% or ±10 mA Switch Timer Range: 0 to 60 minutes (0 = disabled) Increment: 1 minute Accuracy: ±0.5% or ±2 seconds, whichever is greater BE1-CDS220 General Information 1-19...

  • Page 32: Bestlogic

    BESTlogic Update Rate: ¼ cycle GENERAL SPECIFICATIONS AC Current Inputs BE1-CDS220 with 5 A Current Sensing Continuous rating: 20 A One second rating: 400 A ½ For other current levels, use the formula I = (K/t) where t = time in seconds and K = 160,000...

  • Page 33: Communication Ports

    8 kV contact discharges and 15 kV air discharges applied in accordance with IEC 60255-22 UL Recognition U.L. recognized per Standard 508, U.L. File Number E97033. Note: Output contacts are not U.L. recognized for voltages greater than 250 V. BE1-CDS220 General Information 1-21...

  • Page 34: C.s.a. Certification

    12 pounds (5.4 kilograms) maximum Shipping Weight: Approximately 16.5 pounds (7.5 kilograms) Case Configurations 19 inch rack mount, 3 rack units high, or MX case: M1, M2/FT31, and FT32 size. See Section 12, Installation, for more information. 1-22 General Information BE1-CDS220...
  • Page 35 Output Logic Settings ........................2-3 USER INTERFACES ..........................2-3 Front Panel HMI ..........................2-3 ASCII Command Communications ....................2-4 BESTCOMS for BE1-CDS220, Graphical User Interface ..............2-5 GETTING STARTED ..........................2-6 Connections ............................2-6 Entering Test Settings ........................2-6 Checking the State of Inputs ......................2-7 Testing...............................
  • Page 36 This page intentionally left blank. Quick Start BE1-CDS220...

  • Page 37: Section 2 • Quick Start

    This section provides an overview of the BE1-CDS220 Current Differential System. You should be familiar with the concepts behind the user interfaces and BESTlogic before you begin reading about the detailed BE1-CDS220 functions. Sections 3 through 6 in this manual describe in detail each function of the BE1- CDS220.

  • Page 38: Characteristics Of Protection And Control Elements

    As stated before, each element (function block) is equivalent to a discrete device counterpart. For example, the transformer differential element in the BE1-CDS220 relay has all of the characteristics of a version of the BE1-87T transformer differential relay with similar functionality. Figure 2-1 shows the 87 phase differential element inputs and outputs.

  • Page 39: Output Logic Settings

    A complete description of the HMI is included in Section 10, Human-Machine Interface. The BE1-CDS220 HMI is menu driven and organized into a menu tree structure with six branches. A complete menu tree description with displays is also provided in Section 10, Human-Machine Interface. A list of the menu branches and a brief description for scrolling through the menu is in the following paragraphs.

  • Page 40: Ascii Command Communications

    Figure 2-2. 51 HMI Screen ASCII Command Communications The BE1-CDS220 relay has three independent communications ports for serial communications. Basler Terminal in BESTCOMS can be connected to any of the three ports so that the user may send commands to the relay. Alternatively, a computer terminal or PC running a terminal emulation program such as ...

  • Page 41: Bestcoms For Be1-Cds220, Graphical User Interface

    Section 11, ASCII Command Interface, for a more detailed discussion of how to use ASCII text files for setting the relay. BESTCOMS for BE1-CDS220, Graphical User Interface Basler Electric's graphical user interface (GUI) software, BESTCOMS, is an alternative method for quickly  developing setting files in a friendly, Windows based environment.

  • Page 42: Getting Started

    The GUI also allows for downloading industry standard COMTRADE files for analysis of stored oscillography data. Detailed analysis of the oscillography files may be accomplished using Basler  Electric's BESTWAVE software. For more information on Basler Electric's Windows based BESTCOMS (GUI) software, refer to Section 14, BESTCOMS Software.

  • Page 43: Checking The State Of Inputs

    From this position, press the Right scrolling pushbutton until you have reached the screen titled, \STATUS BE1-CDS220 REPORT STATUS. From this position, press the Down scrolling pushbutton one time (\STAT\TARGETS) and press the Right scrolling pushbutton three times. At this time, you should see the OPERATIONAL STATUS Screen, \STAT\OPER_STAT.
  • Page 44 What voltage level is used to develop current flow through the contact sensing inputs? Voltage level is dependent on the power supply option (BE1-CDS220 style) and the position of the contact sensing jumper. See Section 12, Installation, for additional information.
  • Page 45 No, the BE1-CDS220 does not have a battery. It uses a capacitor as a back-up power source for the internal clock on loss of power. This design maintains the clock for at least eight hours.
  • Page 46 Yes, multiple BE1-CDS220 units can use the same IRIG input signal by daisy-chaining the BE1-CDS220 inputs. The burden data is non-linear, approximately 4 kilo-ohms at 3.5 Vdc and 3 kilo-ohms at 20 Vdc. See Section 1, General Information; Section 6, Reporting and Alarm Functions;...
  • Page 47 Table 3-1. Power System Measurement Function Settings ..............3-2 Table 3-2. CT Input Circuit Settings......................3-5 Table 3-3. Internal Compensation Chart....................3-8 Table 3-4Contact Sensing Turn-On Voltage....................3-9 Table 3-5. Output Hold Function Settings....................3-12 BE1-CDS220 Input And Output Functions...
  • Page 48 This page intentionally left blank. Input And Output Functions BE1-CDS220...

  • Page 49: Section 3 • Input And Output Functions

    The frequency of the power system is monitored on the C phase input for CT circuit one. When the current applied to phase C of CT circuit one, is greater than 10% nominal, the BE1-CDS220 relay measures the frequency and varies the sampling rate to maintain 144 samples per cycle over a frequency range of 40 to 63 hertz.
  • Page 50 Input Power System Setup To enter Power System settings, select General Operation from the Screens pull-down menu. Then select the Power System tab. Refer to Figure 3-1. Figure 3-1. General Operation Screen, Power System Tab Input And Output Functions BE1-CDS220...
  • Page 51 CT ratio. The BE1-CDS220 automatically considers this factor so it is not necessary for the user to manually compensate when entering the CT ratio.
  • Page 52 Table 3-2 provides a listing of all acceptable combinations of CT and transformer connection settings and the compensation that the BE1-CDS220 will apply. The recommended settings for each configuration are highlighted in Bold. Figure 3-3 provides details on how to choose the correct CT and transformer connections to describe the application.
  • Page 53 0° LAG WYE (NONE) WYE (NONE) WYE (NONE) WYE (NONE) WYE (NONE) 0° LAG WYE (NONE) DAB) WYE (NONE) WYE (NONE) 30° LAG 30° LEAD WYE (NONE) WYE (NONE) WYE (NONE) 30° LEAD 30° LAG BE1-CDS220 Input And Output Functions...
  • Page 54 WYE (NONE) WYE (NONE) WYE (NONE) WYE (NONE) WYE (NONE) WYE (NONE) 0° LAG WYE (NONE) WYE (NONE) WYE (NONE) WYE (NONE) 0° LAG WYE (NONE) WYE (NONE) WYE (NONE) WYE (NONE) 60° LAG 60° LEAD Input And Output Functions BE1-CDS220...
  • Page 55 Considerations, Problem 5, if there is a ground source within the protected zone, the user can apply a numerical, zero sequence trap to remove the zero sequence components from the current to prevent misoperation on external ground faults. This setting is optional. It is not required to enter a ground source BE1-CDS220 Input And Output Functions...
  • Page 56 SETUP\PWR_S\CON\CTP, and from the ASCII command interface using the SG-CT (setting general-CT input circuit) command. If the BE1-CDS220 relay is equipped with the optional independent ground current input, the CT ratio must be entered for that input. This setting can be entered from the optional HMI using screen 6.3.1.2, SETUP\PWR_S\CON\CTG, from the ASCII command interface using the SG-CTG (setting general-CT input circuit ground) command, and through BESTCOMS.

  • Page 57: Contact Sensing Inputs

    Nominal voltage(s) of the external dc source(s) must fall within the relay dc power supply input voltage range. To enhance user flexibility, the BE1-CDS220 relay uses wide range ac/dc power supplies that cover several common control voltage ratings. To further enhance flexibility, the input circuits are designed to respond to voltages at the lower end of the control voltage range while not overheating at the high end of the control voltage range.

  • Page 58: Outputs

    Alarm Functions, General Status Reporting for more information. OUTPUTS BE1-CDS220 relays have six general-purpose output contacts (OUT1 through OUT6) and one fail-safe, normally closed (relay in de-energized state), alarm output contact (OUTA). Each output is isolated and rated for tripping duty. Relays OUT1 and OUT6 are high speed (one-quarter cycle nominal operating time).

  • Page 59: Retrieving Output Status

    BESTlogic expression for the tripping output. How to do this is described in Section 7, BESTlogic Programmable Logic, Application Tips. BE1-CDS220 Input And Output Functions 3-11...

  • Page 60: Output Logic Override Control

    Enabling output logic override control cannot be accessed from the HMI. It can only be accessed from the ASCII command interface using the CS/CO-OUT=ena/dis (control select/control operate-output override=enable or disable) command. This command only enables or disables logic override control. It does not enable or disable the outputs themselves. 3-12 Input And Output Functions BE1-CDS220...
  • Page 61 Pulsing an Output Contact Outputs can be pulsed to provide the push-to-energize function provided in Basler Electric solid state relays. This is useful in trip testing the protection and control system. When pulsed, the contact changes from the current state as determined by the virtual output logic expression to the opposite state for 200 milliseconds.
  • Page 62 An L indicates that the state of the output is controlled by logic. A zero or one indicates that the logic has been overridden and the contact is held in the open (zero) or closed (one) state. A P indicates that the contact is being pulsed and will return to logic control automatically. 3-14 Input And Output Functions BE1-CDS220...
  • Page 63 VIRTUAL SWITCHES .......................... 4-39 43 - Virtual Selector Switches......................4-39 BESTlogic Settings for Virtual Selector Switches ................. 4-40 Select Before Operate Control of Virtual Selector Switches............4-41 Retrieving Virtual Selector Switches Status from the Relay ............4-42 BE1-CDS220 Protection and Control...
  • Page 64 Table 4-5. MVA and KVn Base Parameters .................... 4-13 Table 4-6. Tap Compensation Settings for Phase Differential ..............4-13 Table 4-7. Operating Settings for Phase Differential ................4-16 Table 4-8. BESTlogic Settings for Neutral Differential................4-19 Table 4-9. Operating Settings for Neutral Differential................4-20 Protection and Control BE1-CDS220...
  • Page 65 Equation 4-5. Solve for the other Tap (TAPn or TAPG) ................4-19 Equation 4-6. Convert the Minpu setting to Primary Current..............4-19 Equation 4-7. Time OC Characteristics for Trip..................4-27 Equation 4-8. Time OC Characteristics for Reset..................4-27 BE1-CDS220 Protection and Control...
  • Page 66 This page intentionally left blank. Protection and Control BE1-CDS220...

  • Page 67: Section 4 • Protection And Control

    SECTION 4 • PROTECTION AND CONTROL GENERAL BE1-CDS220 relays provide many functions that can be used for protection and control of power system equipment in and around the protected zone. Four settings groups are provided for adapting the coordination under various operating conditions with options for controlling which settings are active by automatic or programmable logic criteria.

  • Page 68: Bestlogic Settings For Setting Group Control

    Setting Group Selection from the Screens pull-down menu. Then select the BESTlogic button in the lower left hand corner of the screen. Alternately, settings may be made using the SL-GROUP ASCII command. Figure 4-2. BESTlogic Function Element Screen, Setting Group Selection Protection and Control BE1-CDS220...
  • Page 69 Figure 4-3 shows an example of how the inputs are read when the setting group control function logic is enabled for Mode 1. Note that a pulse on the D3 input while D0 is also active does not initiate a setting group change to SG3 because the AUTO input is active. BE1-CDS220 Protection and Control...
  • Page 70 AUTO input. Note that a pulse on the D1 input while D0 is also active does not initiate a setting change to SG3 because the AUTO input is active. D2647-21 08-21-98 AUTO Figure 4-4. Input Control Mode 2 Protection and Control BE1-CDS220...

  • Page 71: Operating Settings For Setting Group Control

    Settings. The Settings menu is used to select the setting group that the elements settings apply to. Using the pull-down menus and buttons, make the application appropriate settings to the Setting Group Selection function. Table 4-3 summarizes the operating settings for Setting Group Control. BE1-CDS220 Protection and Control...
  • Page 72 Current varies but stays below 75 percent for 5 minutes and at time = 75, Setting Group 2 becomes active and the setting change output pulses. After 20 minutes, Setting Group 0 becomes active and the setting change output pulses. Protection and Control BE1-CDS220...
  • Page 73 If the return time delay setting is set to 0 for a setting group, automatic return for that group is disabled and the relay will remain in that setting group until returned manually of by logic override control. BE1-CDS220 Protection and Control...

  • Page 74: Logic Override Of The Setting Group Control Function

    <mode> entry of CS-GROUP command and CO-GROUP command must match or setting group selection will be rejected. If more than 30 seconds elapse after issuing a CS-GROUP command, the CO-GROUP command will be rejected. CS/CO-GROUP Command Examples: Protection and Control BE1-CDS220...

  • Page 75: Retrieving Setting Group Control Status From The Relay

    DIFFERENTIAL PROTECTION 87 - Phase Differential Protection BE1-CDS220 relays provide three-phase percentage restrained differential protection with high-speed unrestrained instantaneous differential protection. The differential protection includes harmonic restraint to improve security in transformer applications. The 87 function (see Figure 4-8) has five outputs 87RPU (restrained pickup), 87RT (restrained trip), 87UT (unrestrained trip), 2NDHAR (second harmonic restraint picked up), and 5THHAR (fifth harmonic restraint picked up).
  • Page 76 2nd Harmonic Harmonic Status Inhibit Unrestrained 5th Harmonic setting Status Harmonic Restraint Current Transient Fund I Monitor 87 Unrestrained Unrestrained Trip 2X Unrestrained Element setting D2840-24 02-08-99 Figure 4-9. 87 Phase Differential Protection Functional Block Diagram 4-10 Protection and Control BE1-CDS220...
  • Page 77 In many cases, the second harmonic content of the inrush current may show up primarily in only one or two phases, which can cause one or two phases to not be inhibited. The BE1-CDS220 relay allows the second harmonic currents to be shared between the three phases. When second harmonic sharing is...

  • Page 78: Bestlogic Settings For Phase Differential

    7, BESTlogic Programmable Logic. Select Done when the settings have been completely edited. Table 4-4 summarizes the BESTlogic settings for Phase Differential. Table 4-4. BESTlogic Settings for Phase Differential Function Range/Purpose Default 0 = disabled Mode 1 = enabled Logic expression that disables function when TRUE. 4-12 Protection and Control BE1-CDS220...

  • Page 79: Tap Compensation Settings For Phase Differential

    1 ampere units), the auto-tap calculation feature will select the nearest acceptable tap and calculate the other tap (two at a time) so that the correct spread ratio is maintained. If the user is manually calculating the taps, the same adjustment should be made. BE1-CDS220 Protection and Control 4-13...
  • Page 80 Three-phase versions of the BE1-87T also allow internal phase compensation. The jumper settings for the BE1-87T correspond to the internal compensation for the BE1-CDS220 as follows: ∆1 = DAC and ∆2 = DAB. When calculating the tap adjust settings for the BE1-87T, the √3 COMPn factor has to be included regardless of whether phase compensation is done by connecting the CTs in delta or by using internal delta compensation.

  • Page 81: Operating Settings For Phase Differential

    Times Tap. The definitions for the remaining variables in Equation 4-3 are the same as those for Equation 4-1. TAPn 1000 COMPn TAPn CTRn Ipri = TAPn TAPn CTRn COMPn Equation 4-2. Tab Adjustment Equation Equation 4-3. Calculate Primary Amps BE1-CDS220 Protection and Control 4-15...

  • Page 82: Retrieving Phase Differential Status From The Relay

    87ND - Neutral Differential Protection When equipped with the optional independent ground input, BE1-CDS220 relays can provide sensitive differential protection for ground faults on the grounded side of a delta/wye transformer. On impedance grounded systems, ground fault levels may be reduced below the sensitivity of the phase differential protection.
  • Page 83 Current Minimum Slope 87ND Pickup Restrained Trip Fundamenta Phaso Restrained d per Operating Element Fund I Adjustmen unit Ground Current 87ND Restrained Pickup Phasor D2843-01 02-08-99 Figure 4-15. 87 Neutral Differential Protection Functional Block Diagram BE1-CDS220 Protection and Control 4-17...

  • Page 84: Bestlogic Settings For Neutral Differential

    Select Save when finished to return to the BESTlogic Function Element screen. For more details on the BESTlogic Expression Builder, see Section 7, BESTlogic Programmable Logic. Select Done when the settings have been completely edited. 4-18 Protection and Control BE1-CDS220...

  • Page 85: Auto-Tap Compensation Settings For Neutral Differential

    The 87ND auto-tap calculation routine uses the minimum allowable taps to allow the minimum pickup to be set to allow maximum sensitivity to ground faults. Ipri = Minpu n CTR Equation 4-6. Convert the Minpu setting to Primary Current BE1-CDS220 Protection and Control 4-19...

  • Page 86: Retrieving Neutral Differential Status From The Relay

    Retrieving Neutral Differential Status from the Relay The status of each logic variable can be determined from the ASCII command interface using the RG- STAT command. See Section 6, Reporting and Alarm Functions, General Status Reporting, for more information. 4-20 Protection and Control BE1-CDS220...

  • Page 87: Overcurrent Protection

    Each function block can be attached to either of the two hardware CT input circuits by the BESTlogic mode setting. The instantaneous overcurrent protective functions in the BE1-CDS220 relay are labeled 50T because each has a settable time delay. If the time delay is set to zero, they operate as instantaneous overcurrent relays.
  • Page 88 Table 4-10. BESTlogic Settings for Instantaneous Overcurrent Function Range/Purpose Default = Disabled = CT Input Circuit 1 Mode = CT input Circuit 2 = Independent Ground Input (#50TN functions only) Logic expression that disables function when TRUE. 4-22 Protection and Control BE1-CDS220...

  • Page 89: Operating Settings For Instantaneous Overcurrent

    Beside the Logic pull-down menu is a pull-down menu labeled Settings. The Settings menu is used to select the setting group that the element's settings apply to. BE1-CDS220 Protection and Control 4-23...

  • Page 90: Retrieving Instantaneous Overcurrent Status From The Relay

    P (phase), N (neutral), or Q (negative-sequence). The # differentiates between the protective functions (51, 151, or 251). Mode = 0-disable 51PT 1-ct ckt 1 SL-51P 51PPU 2-ct ckt 2 LOGIC D2843-03 07-24-00 Figure 4-21. Time Overcurrent Logic Block 4-24 Protection and Control BE1-CDS220...

  • Page 91: Bestlogic Settings For Time Overcurrent

    BESTlogic settings for each preprogrammed logic scheme. A custom logic scheme must be created and selected in the Logic pull-down menu at the top of the screen before BESTlogic settings can be changed. See Section 7, BESTlogic Programmable Logic. BE1-CDS220 Protection and Control 4-25...

  • Page 92: Operating Settings For Time Overcurrent

    Beside the Logic pull-down menu is a pull-down menu labeled Settings. The Settings menu is used to select the setting group that the element's settings apply to. Table 4-13 summarizes the operating settings for Time Overcurrent. 4-26 Protection and Control BE1-CDS220...

  • Page 93: Retrieving Time Overcurrent Status From The Relay

    Curves. When time current characteristic curve P is selected, the coefficients used in the equation are those defined by the user. Definitions for these equations are provided in Table 4-16. Equation 4-7. Time OC Characteristics for Trip Equation 4-8. Time OC Characteristics for Reset − − BE1-CDS220 Protection and Control 4-27...

  • Page 94: Setting Programmable Curves

    Programmable curve coefficients can be entered regardless of the curve chosen for the protection element. However, the programmable curve will not be enabled until P is selected as the curve for the protective element. Figure 4-24. Curve Coefficients 4-28 Protection and Control BE1-CDS220...

  • Page 95: Negative-Sequence Overcurrent Protection

    When these two factors (√3/2 and 1/√3) are combined, the √3 factors cancel which leaves the one-half factor. Figure 4-25. Phase-to-Phase Fault Magnitude Figure 4-26. Sequence Components for an A-B Fault BE1-CDS220 Protection and Control 4-29...

  • Page 96: Coordination Settings For Negative-Sequence Overcurrent

    BF - Breaker Failure Protection BE1-CDS220 relays provide one function for breaker failure protection. This function includes a timer and a current detector. The current detector can be attached to any of the three phase CT input circuits by the BESTlogic mode setting.

  • Page 97: Bestlogic Settings For Breaker Failure

    BESTCOMS screen used to select BESTlogic settings for the breaker failure element. To open BESTlogic Function Element screen for the breaker failure element, select Overcurrent from the Screens pull-down menu. Then select the button labeled BESTlogic. Alternately, settings may be made using the SL-50BF ASCII command. BE1-CDS220 Protection and Control 4-31...
  • Page 98 Logic expression that disables function when TRUE. Example 1. Make the following changes to the Breaker Failure element. Refer to Figure 4-28. Mode : CT Input 1 INI : BLK : 4-32 Protection and Control BE1-CDS220...

  • Page 99: Operating Settings For Breaker Failure

    Increment precision after conversion is limited to that appropriate for each of those units of measure. Example 1. Make the following operational settings to the breaker failure element. See Figure 4-51. Timer Setting: 100 ms BE1-CDS220 Protection and Control 4-33...

  • Page 100: Retrieving Breaker Failure Status From The Relay

    62 - General Purpose Logic Timers BE1-CDS220 relays provide two general-purpose logic timers, which are extremely versatile. Each can be set for one of five modes of operation to emulate virtually any type of timer. Each function block has one output (62 or 162) that is asserted when the timing criteria has been met according to the BESTlogic mode setting.

  • Page 101: Mode 2, One-Shot Nonretriggerable Timer

    ON time of T1 and an OFF time of T2. When the BLOCK input is held TRUE, the oscillator stops and the output is held OFF. Figure 4-34. Mode 4, Oscillator BE1-CDS220 Protection and Control 4-35...

  • Page 102: Mode 5, Integrating Timer

    TRUE. The timer will time for DELAY time T1 and then the output will latch TRUE. Additional INITIATE input expression changes of state are ignored. Time (T2) is ignored. Refer to Figure 4-36. D2863-07 10-23-03 Figure 4-36. Mode 6, Latch 4-36 Protection and Control BE1-CDS220...

  • Page 103: Bestlogic Settings For General Purpose Logic Timers

    4 = Oscillator 1 = PU/DO Mode 5 = Integrating 2 = One Shot Non-Retrig 6 = Latch 3 = One Shot Retrig Logic expression that initiates timing sequence. Logic expression that disables function when TRUE. BE1-CDS220 Protection and Control 4-37...

  • Page 104: Operating Settings For General Purpose Logic Timers

    0 to 999 ms Milliseconds 0.1 for 0.1 to 9.9 sec. T1 Time, 0.1 to 9999 sec. Seconds 1.0 for 10 to 9999 sec. T2 Time 0 to 599,940 (60 Hz) ∗ Cycles 0 to 499,950 (50Hz) 4-38 Protection and Control BE1-CDS220...

  • Page 105: Retrieving General Purpose Logic Timers Status From The Relay

    VIRTUAL SWITCHES 43 - Virtual Selector Switches The BE1-CDS220 Current Differential System has eight virtual selector switches that can provide manual control, locally and remotely, without using physical switches and/or interposing relays. Each virtual switch can be set for one of three modes of operation to emulate virtually any type of binary (two-position) switch.
  • Page 106 Table 4-21. BESTlogic Settings for Virtual Selector Switches Function Range/Purpose Default 0 = Disabled 2 = On/Off Mode 1 = On/Off/Pulse 3 = Off/Momentary On Example 1. Make the following BESTlogic settings to the Virtual Switch function. See Figure 4-40. Mode: On/Off 4-40 Protection and Control BE1-CDS220...

  • Page 107: Virtual Selector Switches

    An example of an operate command not matching the select command. >CO-243=1 ERROR:NO SELECT ( Note: Must enter “CS-243=1” first to select.) Figure 4-41. Virtual Switches Screen, 43 - 143 - 243 - 343 - 101 Tab BE1-CDS220 Protection and Control 4-41...

  • Page 108: Retrieving Virtual Selector Switches Status From The Relay

    A virtual switch can be used instead of a physical switch to reduce costs with the added benefit that the virtual switch can be operated both locally from the HMI and remotely from a substation computer or modem connection to an operator's console. The BE1-CDS220 relays provide one Virtual Breaker Control Switch (101).
  • Page 109 30-second window. The control selected and the operation selected must match exactly or the operate command will be blocked. If the operate command is blocked and error message is output. BE1-CDS220 Protection and Control 4-43...
  • Page 110 HMI Screen 2.2 provides switch control and displays the status of the virtual control switch (after-trip or after-close). As the previous Example 1 demonstrated, the state of the virtual selector switch can be determined using the CO-101 command in a read-only mode. 4-44 Protection and Control BE1-CDS220...
  • Page 111 ASCII Command and HMI Screen Cross-Reference ................. 5-2 Current ..............................5-3 Frequency ............................5-3 Figures Figure 5-1. Polar Graph for Phase Angle Reporting Reference ..............5-1 Figure 5-2. BESTCOMS Metering Screen....................5-2 Tables Table 5-2. ASCII Command and HMI Metering Cross-Reference............. 5-2 BE1-CDS220 Metering...
  • Page 112 This page intentionally left blank. Metering BE1-CDS220...

  • Page 113: Section 5 • Metering

    Functions, Demand Functions. CURRENT METERING BE1-CDS220 relays provide metering of phases A, B, C, neutral (N), and negative sequence (Q) for CT circuit 1 and CT circuit 2 as well as the optional independent ground (G). Metering data is available in primary or secondary current and can be obtained from the HMI screens 3.1 and 3.2, (\METER\CRNT\...

  • Page 114: Bestcoms Metering Screen

    \METER\CRNT\CT_1-2\I_MEAS Current, Circuits 1-2, B-phase M1-IB, M2-IB \METER\CRNT\CT_1-2\I_MEAS Current, Circuits 1-2, C-phase M1-IC, M2-IC \METER\CRNT\CT_1-2\I_MEAS Current, Circuits 1-2, Neutral M1-IN, M2-IN \METER\CRNT\CT_1-2\I_CALC Current, Circuits 1-2, Negative-Sequence M1-IQ, M2-IQ \METER\CRNT\CT_1-2\I_CALC Current, Ground M-IG \METER\CRNT\GND Differential Currents, all values \METER\DIFF Metering BE1-CDS220...

  • Page 115: Current

    Frequency is metered over a range of 40 to 63 hertz. If the measured frequency is outside this range, the nominal system frequency will be displayed. Frequency is sensed from A-phase to Neutral for four-wire sensing systems or from A-phase to B-phase for three-wire sensing systems. BE1-CDS220 Metering...
  • Page 116 This page intentionally left blank. Metering BE1-CDS220...
  • Page 117 Figure 6-7. Reporting and Alarms Screen, Transformer Monitoring Tab ..........6-17 Figure 6-8. Reporting and Alarms Screen, Breaker Monitoring Tab ............6-20 Figure 6-9. Protective Fault Analysis ....................... 6-22 Figure 6-10. Reporting and Alarms Screen, Breaker Monitoring Tab ............. 6-24 BE1-CDS220 Reporting and Alarm Functions...
  • Page 118 Table 6-20. Relay Trouble Alarms ......................6-40 Table 6-21. Programmable Alarms ......................6-41 Table 6-22. Programmable Alarm Settings....................6-42 Equations Equation 6-1. Dmax Set by Number of Operations ................. 6-21 Equation 6-2. Dmax Set Using Square Root Factor ................6-21 Reporting and Alarm Functions BE1-CDS220...

  • Page 119: Introduction

    It is important to attach (label) meaningful names to the relays and the relay reports. To provide this feature, BE1-CDS220 relays have four relay identification fields: Relay ID, Station ID, General 1, and General 2. These fields are used in the header information lines of the Fault Reports, the Oscillographic Records, and the Sequence of Events Recorder (SER) Reports.

  • Page 120: Clock

    CLOCK The BE1-CDS220 provides a real-time clock with capacitor backup that is capable of operating the clock for up to eight hours after power is removed from the relay. The clock is used by the demand reporting function, the fault reporting function, the oscillograph recording function, and the sequence of events recorder function to time-stamp events.

  • Page 121: Reading And Setting The Clock

    >RG-TIME=8:23P00 GENERAL STATUS REPORTING BE1-CDS220 relays have extensive capabilities for reporting relay status. This is important for determining the health and status of the system for diagnostics and troubleshooting. Throughout this manual, reference is made to the RG-STAT (report general, status) report and the appropriate HMI screens for determining the status of various functions.
  • Page 122 Table 6-3 to determine the status of each logic variable. See Section 7, BESTlogic Programmable Logic, for more information about BESTlogic Variables. This information is not available from the HMI. RL (report logic) also reports the BESTlogic logic variables. Reporting and Alarm Functions BE1-CDS220...

  • Page 123: Other Report General Commands

    The RG-VER command has multiple line outputs and is not read with the RG command. Example 1. Read the general reports. >RG RG-DATE=01/01/99 RG-TIME=00:09:37 RG-TARG=NONE RG-ADDR1= RG-ADDR2= RG-43STAT=00000000 RG-101STAT=NOTUSED RG-GRPACTIVE=0 RG-GRPCNTRL=L RG-INPUT=00000000 RG-LOGIC=BASIC-87 RG-OUTCNTRL=LLLLLLL RG-OUTSTAT=0000000 BE1-CDS220 Reporting and Alarm Functions...

  • Page 124: Demand Functions

    This value is stored in registers and reported for one minute. After one minute has elapsed, the sliding block demand method again calculates the average value of the measured current for the set time interval including the most recent minute. This value is updated each minute. Reporting and Alarm Functions BE1-CDS220...

  • Page 125: Setting The Demand Reporting Function

    Thermal, Block, or Sliding Block. Interval (Minutes) can be set from 0 to 60. Input can be set for CT Input 1 or CT Input 2. Using the pull-down menus and buttons, make the application appropriate current demand settings. Demand reporting settings are summarized in Table 6-4. Figure 6-3. Reporting and Alarms Screen, Demands Tab BE1-CDS220 Reporting and Alarm Functions...

  • Page 126: Retrieving Demand Reporting Information

    >RD-PIB 2.16A 12:14 12/01/05 Example 2. Reset all peak demand current values. >RD-PI=0 RD-T/Y Commands Purpose: Report today's or yesterday’s demands Syntax: RD-T or RD-Y Comments: Reports all demands for T (today) or Y (yesterday). Reporting and Alarm Functions BE1-CDS220...

  • Page 127: Overload And Unbalance Alarms Function

    Figure 6-4. Reporting and Alarms Screen, Demands Tab Table 6-5 provides the specifications for the Demand Alarm Threshold settings. The ASCII commands for setting the Demand Alarm Thresholds are listed in Section 11, ASCII Command Interface. BE1-CDS220 Reporting and Alarm Functions...

  • Page 128: Optional Load Profile Recording Function

    Optional Load Profile Recording Function Load profile recording is an optional selection when the BE1-CDS220 is ordered. The Load Profile, 4000 Point Data Array option (Y as the third character from the right in the style chart) uses a 4,000-point data array for data storage.

  • Page 129: Differential Current Monitoring Function

    The differential check record needs a specific amount of secondary current to properly measure phase angles. In 5-ampere relays, that amount BE1-CDS220 Reporting and Alarm Functions 6-11...
  • Page 130 PHASE A PHASE B PHASE C MEASURED I PRI CT CKT1: 209 @ 0 206 @ 240 206 @ 121 CT CKT2: 528 @ 211 516 @ 91 528 @ 332 MEASURED I SEC 6-12 Reporting and Alarm Functions BE1-CDS220...
  • Page 131 0.27 @ 0 0.27 @ 240 0.27 @ 121 CT CKT2: 0.27 @ 241 0.27 @ 122 0.27 @ 2 IOP: 0.28 *TAP 0.28 *TAP 0.28 *TAP SLOPE RATIO 104 % 104 % 104 % BE1-CDS220 Reporting and Alarm Functions 6-13...

  • Page 132: Setting Differential Current Monitoring Alarms

    RA-DIFF Command Purpose: Read/Trigger Differential Report Data Syntax: RA-DIFF[=TRIG] where TRIG triggers a Differential Report RA-DIFF Command Examples: Example 1. Retrieve the differential check record. >RA-DIFF Example 2. Trigger a differential check record. >RA-DIFF=TRIG 6-14 Reporting and Alarm Functions BE1-CDS220...

  • Page 133: Transformer Monitoring Functions

    Each of these functions can be set as a programmable alarm. See the paragraphs on Alarms Function, later in this section for more information on the use of programmable alarms. BE1-CDS220 Reporting and Alarm Functions 6-15...

  • Page 134: Number Of Through Faults Monitoring Function

    ASCII command ST-DUTY (setting transformer, duty) command or the HMI using Screen 6.6.1, \SETUP\XFRMR\DUTY. This function selects the transformer CT to be monitored that also affects the transformer alarm function (SA-TX). Table 6-8 lists the settings for the transformer duty monitoring function. 6-16 Reporting and Alarm Functions BE1-CDS220...
  • Page 135 I*t, DMAX = 300 operations @ 20 kA with a 100 ms fault clearing time. Block accumulation of duty when IN5 is energized. >ST-DUTY = 1, 600E3, 2, 1N5 Example 2. Read ST-DUTY >ST-DUTY 2,6.000e+04,2,0 BE1-CDS220 Reporting and Alarm Functions 6-17...

  • Page 136: Transformer Alarms

    Transformer alarm function enabled and set for through faults. Alarm Limit 0 to 100%; Increment = 1; Measured in % of DMAX (in mode 1) Alarm Limit 0 to 99999; Increment = 1; Number of through faults (in mode 2) 6-18 Reporting and Alarm Functions BE1-CDS220...

  • Page 137: Breaker Monitoring

    >SA-TX3=1,80 BREAKER MONITORING Depending on the system scheme, one BE1-CDS220 relay can provide overcurrent protection for more than one circuit breaker. However, breaker-monitoring functions provide extensive monitoring and alarms for only a single circuit breaker. This extensive monitoring helps to manage equipment inspection and maintenance expenses.
  • Page 138 Reporting in this section provide more information on this command. The current value of the breaker operations counter register can be read from HMI Screen 4.3.1, \REPRT\BRPTS\STATUS. Pressing the Edit key allows the user to enter a number into the register to 6-20 Reporting and Alarm Functions BE1-CDS220...

  • Page 139: Breaker Duty Monitoring

    D calculated by the equation:     × operations Equation 6-2. Dmax Set Using Square Root Factor   interrupt BE1-CDS220 Reporting and Alarm Functions 6-21...
  • Page 140 Red TRIP LED (When SG-TRIGGER (Trip) is TRUE) solid Breaker interruption duty Transformer (When SG-TRIGGER (PU) is TRUE) fault duty Setting group (When SG-TRIGGER (PU) is TRUE) D2843-42 change blocked 09-29-03 Figure 6-9. Protective Fault Analysis 6-22 Reporting and Alarm Functions BE1-CDS220...
  • Page 141 Breaker Duty Monitoring function for Circuits 1 or 2. To open the screen, select Reporting and Alarms from the Screens pull-down menu. Then select the Breaker Monitoring tab. Alternately, settings may be made using the SB-DUTY ASCII command. BE1-CDS220 Reporting and Alarm Functions 6-23...
  • Page 142 Select Save when finished to return to the BESTlogic Function Element screen. For more details on the BESTlogic Expression Builder, See Section 7, BESTlogic Programmable Logic. Select Done when the settings have been completely edited. Figure 6-11. BESTlogic Function Element Screen, Breaker Duty Monitoring, Block 6-24 Reporting and Alarm Functions BE1-CDS220...
  • Page 143 CT circuit parameters set in the SB-DUTY function. The output of the breaker clearing time function is reported as a line in the fault summary reports. It is important to note that if the TRIP logic BE1-CDS220 Reporting and Alarm Functions...

  • Page 144: Breaker Alarms

    0 to 99,999 in operations, increment = 1 Mode Point 3 0, 20 to 1,000 in milliseconds (m), seconds (s), or cycles (c). Setting Mode is reported in milliseconds if less than 1 seconds. 6-26 Reporting and Alarm Functions BE1-CDS220...

  • Page 145: Trip Circuit Monitor

    If the trip circuit voltage is significantly greater than the power supply voltage (for example, when using a capacitor trip device), the user should program the BE1-CDS220 to use one of the other output relays for tripping. In this situation, the trip circuit monitor function will not be available.

  • Page 146: Fault Reporting

    Fault Reporting Expressions and Settings The fault reporting function records and reports information about faults that have been detected by the relay. The BE1-CDS220 provides many fault reporting features. These features include Fault Summary Reports, Sequence of Events Recorder Reports, Oscillographic Records, and Targets.
  • Page 147 When this expression becomes TRUE (1), it initiates the pickup VO12+BFPU timing sequence. Logic expression used to define the trigger for fault reporting LOGIC when relay is not picked up. When this expression is TRUE (1), 2NDHAR+5THHAR fault reporting is triggered. BE1-CDS220 Reporting and Alarm Functions 6-29...

  • Page 148: Targets

    Alternately, targets can be enabled using the SG-TARG ASCII command. Using the SG-TARG command, you can select which protective elements trigger a target and what type of logic condition will reset the targets. 6-30 Reporting and Alarm Functions BE1-CDS220...
  • Page 149 HMI menu branch 4, Reports. Password access is not required to reset targets at the HMI. Figure 6-18. Target Reset Logic Figure 6-18 illustrates the target reset logic. BE1-CDS220 Reporting and Alarm Functions 6-31...
  • Page 150 Report/Reset Target status Syntax: RG-TARG RG-TARG Command Example: Example 1. Read the targets from the ASCII command interface when the instantaneous overcurrent elements (50 and 150), phase A and Neutral logged targets. >RG-TARG 50AN; 150AN 6-32 Reporting and Alarm Functions BE1-CDS220...

  • Page 151: Fault Summary Reports

    Fault Summary Reports The BE1-CDS220 records information about faults and creates fault summary reports. A maximum of 12 fault summary reports are stored in the relay. The two most recent reports are stored in nonvolatile memory. When a new fault summary report is generated, the relay discards the oldest of the 12 events and replaces it with a new one.
  • Page 152 If the pickup or logic expressions stay TRUE for more than 60 seconds, an alarm bit in the programmable alarm function is set and this line is reported as N/A. In this situation, the fault reporting functions 6-34 Reporting and Alarm Functions BE1-CDS220...
  • Page 153 To obtain the most recent report, use RF-NEW. If additional detail is desired, Sequence of Events Recorder data and Oscillographic data can be obtained for the faults also. This is discussed in greater detail later in this section. BE1-CDS220 Reporting and Alarm Functions 6-35...

  • Page 154: Oscillographic Records

    SG-OSC (settings general, oscillography) ASCII command. See Table 6-19 for possible settings. Table 6-19. Oscillographic Records Settings 6, 8, 10, 12, 15, 16, 20, 24, 32 Range Default Figure 6-21. Oscillographic Records Selector 6-36 Reporting and Alarm Functions BE1-CDS220...
  • Page 155 Software for IBM compatible computers is available from Basler Electric to convert binary files to ASCII format. The download protocol may be either XMODEM or XMODEM CRC format. For ease of reference the name of the downloaded file should be the same as the command.

  • Page 156: Sequence Of Events Recorder

    3. RS-ALM (report SER, alarm) This command retrieves all alarm events that exist since the last RS=0 command was issued. (RS=0 resets the new records counter to zero.) This information can also be obtained using the RA-SER command. 6-38 Reporting and Alarm Functions BE1-CDS220...
  • Page 157 BE1-CDS SEQUENCE OF EVENTS DIRECTORY REPORT DATE : 04/26/04 REPORT TIME : 16:43:36 STATION ID : SUBSTATION_1 RELAY ID : BE1-CDS220 USER1 ID : USER1_ID USER2 ID : USER2_ID RELAY ADDRESS : 0 NEW RECORDS : 246 (15:44:05.776 04/26/03 - 16:42:08.789 04/26/03) TOTAL RECORDS : 246 (15:44:05.776 04/26/03 - 16:42:08.789 04/26/03)

  • Page 158: Alarms Function

    The relay resets by going through a full startup and initialization cycle. If no problems are detected, the relay returns online and enables protection. 6-40 Reporting and Alarm Functions BE1-CDS220...

  • Page 159: Major, Minor, And Logic Programmable Alarms

    ∗ Alarms with an asterisk are non-latching. A non-latching alarm clears itself automatically when the alarm condition goes away. All other alarms are latching and must be manually reset by using the HMI Reset button or the RA=0 command. BE1-CDS220 Reporting and Alarm Functions 6-41...
  • Page 160 The HMI display scrolls between displaying all active alarm points. This includes alarms that are not programmable (relay trouble alarms). Any latched alarms that are not currently active can be reset by pressing the HMI Reset key. See Figure 6-25 for logic. 6-42 Reporting and Alarm Functions BE1-CDS220...
  • Page 161 Figure 6-25 shows the alarm reset logic. After an operation, alarms information can be viewed using BESTCOMS. Select Metering from the Reports pull-down menu. Select the Start Polling button. See Figure 6-26. Figure 6-26. Alarms Status, Metering Screen BE1-CDS220 Reporting and Alarm Functions 6-43...

  • Page 162: Links Between Programmable Alarms And Bestlogic

    BESTlogic variable, or series of variables to be connected to the input. Select Save when finished to return to the BESTlogic Function Element screen. For more details on the BESTlogic Expression Builder, see Section 7, BESTlogic Programmable Logic. Select Done when the settings have been completely edited. 6-44 Reporting and Alarm Functions BE1-CDS220...

  • Page 163: Hardware And Software Version Reporting

    To view the version of the relay once the download is complete, select General Operation from the Screens pull-down menu. Then select the Identification tab (Figure 6-28). The General Info tab (Figure 6- 29) displays all of the style information about the relay. BE1-CDS220 Reporting and Alarm Functions 6-45...
  • Page 164 Figure 6-28. General Operation Screen, Identification Tab Figure 6-29. General Operation Screen, General Info Tab 6-46 Reporting and Alarm Functions BE1-CDS220...
  • Page 165 Figure 7-3. Virtual Output Logic .........................7-5 Figure 7-4. BESTlogic Expression Builder Screen ..................7-6 Figure 7-5. BESTlogic Screen, Logic Select Tab ..................7-7 Tables Table 7-1. Logic Variable Names and Descriptions .................. 7-4 Table 7-2. Programmable Variable Name Setting ..................7-9 BE1-CDS220 BESTlogic Programmable Logic...
  • Page 166 This page intentionally left blank. BESTlogic Programmable Logic BE1-CDS220...

  • Page 167: Section 7 • Bestlogic Programmable Logic

    LOGIC INTRODUCTION Multifunction relays such as the BE1-CDS220 Current Differential System are similar in nature to a panel of single-function protective relays. Both must be wired together with ancillary devices to operate as a complete protection and control system. In the single-function static and electromechanical environment, elementary diagrams and wiring diagrams provide direction for wiring protective elements, switches, meters, and indicator lights into a unique protection and control system.
  • Page 168 0-disable 51QPU 251QT 1-enable NEG SEQ Mode ALMMI 251QPU RSTALM ALARMS (251Q) ALMLGC RSTTARG D 2 8 5 7-1 7.vs d 1 1-0 2 -9 9 Figure 7-1. BESTlogic Function Blocks - page 1 of 2 BESTlogic Programmable Logic BE1-CDS220...
  • Page 169 LOGIC OPTO CO-OUT3 ISOLATION OPTO OUTPUT ISOLATION LOGIC CO-OUT4 OPTO ISOLATION OUTPUT LOGIC OPTO CO-OUT5 ISOLATION OPTO ISOLATION OUT6 OUTPUT LOGIC OPTO CO-OUT6 D2857-18.vsd ISOLATION 08-01-00 Figure 7-2. BESTlogic Function Blocks - page 2 of 2 BE1-CDS220 BESTlogic Programmable Logic...
  • Page 170 87 Neutral Picked Up 51PT 51 Phase Tripped 51PPU 51 Phase Picked Up 51NT 51Neutral Tripped 51NPU 51 Neutral Picked Up 51QT 51 Negative-Sequence Tripped 51QPU 51 Negative-Sequence Picked Up 151PT 151 Phase Tripped 151PPU 151 Phase Picked Up BESTlogic Programmable Logic BE1-CDS220...

  • Page 171: Function Block Logic Settings

    Function Block Logic Settings Each function block is equivalent to its discrete device counterpart. For example, the phase percentage differential function block in the BE1-CDS220 relay shown in Figure 7-1 has many of the characteristics of a BE1-87T transformer differential relay.

  • Page 172: Logic Schemes

    Unneeded inputs or outputs may be left open to disable a function. Or a function element can be disabled through operating settings. Unused current sensing inputs should be shorted to minimize noise pickup. BESTlogic Programmable Logic BE1-CDS220...

  • Page 173: The Active Logic Scheme

    The default, active logic scheme for the BE1-CDS220 is named BASIC-87. If the function element configuration and output logic of Basic Transformer Logic Scheme meets the requirements of your application, then only the operating settings (power system parameters and threshold settings) need to be adjusted before placing the relay in service.

  • Page 174: Custom Logic Schemes

    If there are problems with a customized logic scheme, the RG-STAT command can be used to check the status of all logic variables. More information about the RG-STAT command can be found in Section 6, Reporting and Alarm Functions. BESTlogic Programmable Logic BE1-CDS220...

  • Page 175: User Input And Output Logic Variable Names

    Input and output logic variable names are assigned by typing them into the appropriate text box on the related BESTCOMS screen. All of the BE1-CDS220’s inputs, outputs, and 43 switches have labels that can be edited. Table 7-2 shows the range and purpose of each label. Alternately, labels may be edited using the SN-ASCII command.
  • Page 176 This page intentionally left blank. 7-10 BESTlogic Programmable Logic BE1-CDS220...
  • Page 177 Block Neutral and Negative Sequence Protection................8-52 Setting Group Selection ........................8-52 Output Contact Seal-In ........................8-52 Latching a Tripping Contact ......................8-53 Latching a Programmable Logic Alarm or Creating a Pseudo Target ..........8-55 Logic Settings Associated With Figure 8-20 ..................8-55 BE1-CDS220 Application...
  • Page 178 Figure 8-5. Typical One-Line Diagram for TX-W-CTL................8-15 Figure 8-6. Typical Logic Diagram for TX-W-CTL..................8-16 Figure 8-7. Device Interconnection for Integrated Protection System Using BE1-CDS220 for Transformer Protection and BE1-851 or BE1-951 for Bus and Feeder Protection........8-28 Figure 8-8. Typical One-Line Diagram for TX-W-BU ................8-29 Figure 8-9.

  • Page 179: Section 8 • Application

    OVERVIEW OF PREPROGRAMMED LOGIC SCHEMES The BE1-CDS220 has six preprogrammed logic schemes. Three of the logic schemes are intended for use on transformers. One of the schemes is for motor protection with a speed sensing input, one is for bus protection with backup, and one is a basic 87 function designed for multiple applications including transformer, motor, bus, or generator protection.

  • Page 180: Basic Differential Protection Logic Scheme

    BE1-CDS220 are hard wired to the feeder protection package, providing a high-speed backup, bus interlocked, zone of bus protection. When the BE1-CDS220 detects a feeder relay out of service, the BE1-CDS220 50/51P, N, and Q protection elements and outputs are automatically reconfigured to provide feeder protection.

  • Page 181: Motor Protection Logic Scheme

    Basler Electric products are among the most reliable in the industry, but we believe that it does not make good engineering sense to place all your eggs in one basket. That is why Basler strongly recommends that a second multifunction device be installed to provide independent backup and zone overlapping for each protected zone.

  • Page 182: Basic Differential Logic Scheme

    These basic logic schemes were created by applications personnel from the utility industry and are easily modified to meet specific user needs. For applications assistance, contact your local Basler Electric representative. BASIC DIFFERENTIAL LOGIC SCHEME...
  • Page 183 CT Input 2 BE1-CDS220 Out1 52-G Out2 Out3 Out4 Field CT Input 1 CT Input 1 BE1-CDS220 Out4 52-M Out1 Out2 Out3 CT Input 2 CT Input 1 BE1-CDS220 Out4 Main Out1 Out2 Out3 CT Input 2 CT Input 1...

  • Page 184: Application

    1. The 87 and 51 protection elements are logic enabled by the programming shown in Table 8-1 to provide a trip through the BE1-CDS220 output contacts. Typically, the 87 protection element provides high-speed percent restrained, phase, and ground protection for faults inside the differential zone.

  • Page 185: Alarms

    1 (CT Input 1) Used for timed negative sequence overcurrent protection for CT input 1 (CT Input 1) circuit 1. Auto/Manual Logic: Set to 1 (/0) to enable automatic selection. No 1 (Discrete GROUP manual selection is used. Inputs) BE1-CDS220 Application...
  • Page 186 BESTlogic Expression: VO11=51PT+51NT+51QT+87RT+87UT VO12 is TRUE when any 87 or VO12 Protective pickup expression PROT-PICKE NORMAL 51 element picks up BESTlogic Expression: VO12=87UT+51PPU+51NPU+51QPU+87RPU (87UT is included to trigger the fault recorder because there is no unrestrained pickup output) Application BE1-CDS220...
  • Page 187 Table 8-6. BASIC-TX Logic Settings and Equations SL-N=BASIC-TX SL-87=1,0 SL-87ND=0,0 SL-50TP=0,0; SL-50TN=0,0; SL-50TQ=0,0 SL-150TP=0,0; SL-150TN=0,0; SL-150TQ=0,0 SL-250TP=0,0; SL-250TN=0,0; SL-250TQ=0,0 SL-51P=0,0; SL-51N=G,0; SL-51Q=0,0 SL-151P=1,0; SL-151N=1,0; SL-151Q=1,0 SL-251P=2,0; SL-251N=2,0; SL-251Q=2,0 SL-62=0,0,0 SL-162=0,0,0 SL-BF=0,0,0 SL-GROUP=1,0,0,0,0,/0 SL-43=0 SL-143=0 SL-243=0 SL-343=0 SL-443=0 SL-543=0 SL-643=0 SL-743=0 SL-101=0 BE1-CDS220 Application...
  • Page 188 SL-VOA=0 SL-VO1=87RT+87UT SL-VO2=87RT+87UT SL-VO3=87RT+87UT SL-VO4=151PT+51NT+151NT+151QT SL-VO5=251PT+251NT+251QT SL-VO6=ALMMAJ SL-VO7=0 SL-VO8=0 SL-VO9=0 SL-VO10=0 SL-VO11=151PT+251PT+51NT+151NT+251NT+151QT+251QT+87RT+87UT SL-VO12=87UT+151PPU+251PPU+51NPU+151NPU+251NPU+151QPU+251QPU+87RPU SL-VO13=IN6 SL-VO14=IN7 SL-VO15=IN8 BE1-CDS220 CT Input 1 Out4 52-1 151P 151N 151Q Out2 Out1 CT Input 1 Out3 CT Input G (Optional) CT Input 2 Out5 251P...

  • Page 189: Protection Elements

    (N only) is connected to a ground CT at the grounded side of a delta-wye transformer. The ground-input (G) is an option on the BE1-CDS220 and must be ordered. Paralleled CTs inside a delta tertiary (3Io) can also feed the 51N. The 87, 51, 151, and 251 protection elements are logic enabled by the settings shown in Table 8-6 to provide a trip through the BE1-CDS220 output contacts.

  • Page 190: Integration Of Protection, Control, And I/O Elements

    Optional inputs. Used for programmable alarms and SER reporting. For example, sudden pressure trip or transformer INPUT_6, IN6 - IN8 hot spot alarm, etc. Drives VO13-VO15 which are INPUT_7, CLOSED OPEN programmable alarm points 21-23. Label inputs as INPUT_8 appropriate. 8-12 Application BE1-CDS220...
  • Page 191 BESTlogic Expression: VO1=87RT+87UT OUT2 contact closes if restrained Phase differential trip. 87TRIP-OUT TRIP NORMAL or unrestrained trip occurs. BESTlogic Expression: VO2=87RT+87UT OUT3 contact closes if restrained Phase differential trip. 87TRIP-OUT TRIP NORMAL or unrestrained trip occurs. BESTlogic Expression: VO3=87RT+87UT BE1-CDS220 Application 8-13...

  • Page 192: Alarms

    The Basic Transformer With Control Logic (TX-W-CTL) scheme was designed to provide a primary zone of differential relaying and three backup zones of time overcurrent relaying for phase and ground faults in two-winding transformer applications. This scheme also uses virtual control switch logic to eliminate the need for external control switches. 8-14 Application BE1-CDS220...
  • Page 193 TX-W-CTL application and how the elements are logically wired together (equations). If the user should decide to build on this scheme, all elements required for a more detailed application are available through programming. For programming details, refer to Section 7, BESTlogic Programmable Logic. BE1-CDS220 CT Input 1 Out1...
  • Page 194 Table 8-11. TX-W-CTL Logic Settings and Equations SL-N=TX-W-CTL SL-87=1,243 SL-87ND=0,0 SL-50TP=0,0; SL-50TN=0,0; SL-50TQ=0,0 SL-150TP=0,0; SL-150TN=0,0; SL-150TQ=0,0 SL-250TP=0,0; SL-250TN=0,0; SL-250TQ=0,0 SL-51P=0,0; SL-51N=G,0; SL-51Q=0,0 SL-151P=1,0; SL-151N=1,0; SL-151Q=1,0 SL-251P=2,0; SL-251N=2,0; SL-251Q=2,0 SL-62=0,0,0 SL-162=0,0,0 SL-BF=0,0,0 SL-GROUP=1,0,0,0,0,/343 SL-43=3 SL-143=3 SL-243=2 SL-343=2 SL-443=0 SL-543=0 SL-643=0 SL-743=0 SL-101=1 SL-CKTMON=0,0,0 SL-VOA=0 8-16 Application BE1-CDS220...

  • Page 195: Protection Elements

    (N only) is connected to a ground CT at the grounded side of a delta-wye transformer. The ground input (G) is an option on the BE1-CDS220 and must be ordered. Paralleled CTs inside a delta tertiary (3Io) can also feed the 51N. The 87, 51, 151, and 251 protection elements are logic enabled to provide a trip through the BE1-CDS220 outputs.

  • Page 196: Alarms

    Used for timed ground-overcurrent protection for independent ground G (Ground input circuit. Input) 151P Used for timed phase-overcurrent protection for CT input circuit 1. 1 (CT Input 1) 151N Used for timed neutral-overcurrent protection for CT input circuit 1. 1 (CT Input 1) 8-18 Application BE1-CDS220...
  • Page 197 NORMAL contact. overcurrent trip occurs. BESTlogic Expression: VO1=87RT+87UT+51NT+151PT+151NT+151QT OUT2 contact closes if restrained or unrestrained trip occurs or for Breaker 1 Trip. TRIP-BKR1- TRIP NORMAL 51 or 151 trip or for control switch trip. BESTlogic Expression: VO2=87RT+87UT+51NT+151PT+151NT+151QT+43 BE1-CDS220 Application 8-19...
  • Page 198 Label will be displayed on the alarm report when TRUE. BESTlogic Expression: VO13=243 Optional. Use to annunciate VO14 an alarm when alarm point VO14 is TRUE when IN7 is TRUE. IN7-ALARM ACTIVE NORMAL 22 is enabled. BESTlogic Expression: VO14=IN7 8-20 Application BE1-CDS220...

  • Page 199: Transformer With Backup Scheme

    (similar to the BE1-851 BUS and BACKUP Logic Scheme). Figure 8-7 shows the interconnection of the BE1-851 or BE1-951 relays providing bus and feeder protection with a BE1-CDS220 (TX-W-BU) providing backup transformer protection. The TX-W-BU scheme also includes a low-side breaker BF (breaker failure) protection element with fast current reset.

  • Page 200: Protection Elements

    Typically, the 250T protection element is set to coordinate with a high-speed bus-interlocking scheme (851 or BE1-CDS220) to provide a definite time coordination interval of 18 to 20 cycles for bus fault backup protection. The 250T protection element should have a pickup setting greater than the highest feeder instantaneous element to ensure that it will not pickup before any feeder relay.

  • Page 201: Integration Of Protection, Control, And I/O Elements

    Alarm is detected (ALMMAJ), the associated LED lights, but in this scheme, no output relay is programmed to operate. When a Minor Alarm (ALMMIN) is detected, the associated LED lights, but in this scheme, no output relay is programmed to operate. BE1-CDS220 Application 8-23...

  • Page 202: Test Mode

    Used for timed phase-overcurrent protection for CT input circuit 1. 1 (CT Input 1) 151N Used for timed neutral-overcurrent protection for CT input circuit 1. 1 (CT Input 1) Used for timed negative sequence-overcurrent protection for CT input 151Q 1 (CT Input 1) circuit 1. 8-24 Application BE1-CDS220...
  • Page 203 HMI or ASCII command interface. Table 8-20. TX-W-BU Output Logic State Labels Output Purpose Description Label True False OUTA contact closes when Relay Trouble alarm. RELAY-TROU ACTIVE NORMAL (OUTA) relay trouble alarm occurs. BESTlogic Expression: VOA=0 BE1-CDS220 Application 8-25...
  • Page 204 Initiate BF timing when protective trip expression is Current supervised breaker TRUE. Or when external initiate VO10 BFI-BF NORMAL failure initiate expression. contact (IN7) is sensed and any of the fault detectors is picked BESTlogic Expression: VO10= VO11+IN7*150TPPU+IN7*150TNPU+IN7*150TQPU 8-26 Application BE1-CDS220...
  • Page 205 BESTlogic Expression: VO13=43 Alarm bit #23 indication that the relay is in test mode and TRUE if IN8 is de-energized or if VO15 IN8-ALARM ACTIVE NORMAL that breaker failure is virtual switch 743 is closed. disabled. BESTlogic Expression: VO15=/IN8+743 BE1-CDS220 Application 8-27...
  • Page 206 IN3 BUS RELAY . . . IN4 BUS RELAY OPTIONAL INSTANTANEOUS FEEDER BACKUP TEST MODE BLOCK MODE Figure 8-7. Device Interconnection for Integrated Protection System Using BE1-CDS220 for Transformer Protection and BE1-851 or BE1-951 for Bus and Feeder Protection 8-28 Application BE1-CDS220...
  • Page 207 D2850-01.vsd 04-23-99 BE1-CDS220 CT Input 1 Out1 52-1 151P 151N 151Q CT Input 1 CT Input G (Optional) CT Input 2 251P 251N 251Q Out4 Out2 52-2 250TP 250TN 250TQ Out5 50TP 50TN 50TQ Out3 52-2 CT Input 2 Figure 8-8. Typical One-Line Diagram for TX-W-BU...

  • Page 208: Bus With Backup Scheme

    Figure 8-10 shows the interconnection of BE1-851 or BE1-951 relays for backup and feeder protection and the BE1-CDS220 (BUS-W-BU). Figure 8-11 shows the interconnection of a BE1- CDS220 (TX-W-BU) for backup protection, a BE1-851 or BE1-951 for feeder protection, and the BE1- CDS220 for bus protection.
  • Page 209 IN7 BUS-W-BU . . . IN8 BUS-W-BU OPTIONAL INSTANTANEOUS FEEDER BACKUP TEST MODE BLOCK MODE Figure 8-10. Device Interconnection for Integrated Protection System Using BE1-CDS220 for Bus Protection and BE1-851 or BE1-951 for Feeder and Backup Protection BE1-CDS220 Application 8-31...
  • Page 210 . . . IN8 BUS-W-BU OPTIONAL INSTANTANEOUS FEEDER BACKUP TEST MODE BLOCK MODE P0004-07.vsd 08-14-00 Figure 8-11. Device Interconnection for Integrated Protection System Using BE1-CDS220 for Transformer and Bus Protection and BE1-851 or BE1-951 for Feeder Protection 8-32 Application BE1-CDS220...
  • Page 211 SL-151N=1,0; SL-151Q=1,0 SL-251P=0,0; SL-251N=0,0; SL-251Q=0,0 SL-62=0,0,0 SL-162=0,0,0 SL-BF=0,0,0 SL-GROUP=2,IN7,0,0,0,0 SL-43=2 SL-143=0 SL-243=0 SL-343=0 SL-443=0 SL-543=0 SL-643=0 SL-743=2 SL-101=1 SL-CKTMON=0,0,0 SL-VOA=0 SL-VO1=87RT+VO8*/VO14 SL-VO2=0 SL-VO3=VO9*VO14 SL-VO4=87RT+VO9*/VO14+VO10+101T SL-VO5=/IN3*/IN4*101C SL-VO6=VO7*/VO15 SL-VO7=87RT+VO9*/VO14+VO10 SL-VO8=50TPT+50TNT+50TQT SL-VO9=50TPT+50TNT+50TQT+51PT+51NT+51QT SL-VO10=150TPT+150TNT+150TQT+151PT+151NT+151QT SL-VO11=50TPT+150TPT+50TNT+150TNT+50TQT+150TQT+51PT+151PT+51NT+151NT+51QT+ 151QT+87RT SL-VO12=50TPPU+150TPPU+50TNPU+150TNPU+50TQPU+150TQPU+51PPU+151PPU+51NPU+ 151NPU+51QPU+151QPU+87RPU SL-VO13=43 SL-VO14=SG1 SL-VO15=/IN8+743 BE1-CDS220 Application 8-33...
  • Page 212 Figure 8-12. Typical One-Line Diagram for BUS-W-BU 8-34 Application BE1-CDS220...
  • Page 213 Figure 8-13. Typical Logic Diagram for BUS-W-BU BE1-CDS220 Application 8-35...

  • Page 214: Protection Elements

    2 to 4 cycles to allow time for the feeder protection to detect, pickup, and start timing. If the fault is not on a feeder, the 50T protection element of the BE1-CDS220 bus is not blocked and trips in 2 to 4 cycles through outputs 1 and 4 as previously discussed. The overlapping 250T...

  • Page 215: Test Mode

    1 causing the logic to switch to group 1. When the bus BE1-CDS220 is in setting group 1, it is operating in feeder backup mode. This expression is programmed to virtual output 14 which drives alarm bit #22 in the programmable alarm mask.
  • Page 216 NORMAL PICKEDUP preprogrammed schemes with interlock logic. Signal from relay on bus source that is using BACKUP logic that a BACKUP- feeder relay is out of service. BE1-851, BE1-951, or BE1-CDS220 BACKUP NORMAL FDR-RELAY using preprogrammed logic scheme BACKUP. Puts the relay in test mode so that breaker failure is disabled...
  • Page 217 Auto/Manual Logic: Switch to setting group 1 if feeder relay is out of GROUP service as indicated by closed contact from relay with BACKUP logic 2 (Binary Inputs) such as BE1-851, BE1-951, or BE1-CDS220. Table 8-24. BUS-W-BU Virtual Switch Logic State Labels Switch...
  • Page 218 Used for high speed bus OC Elements have 2-4 cycles delay 50T-INTERL TRIP NORMAL trip in normal mode or feeder due to interlock with feeder relay breaker inst. trip in feeder pickups. backup mode. BESTlogic Expression: VO10=50TPT+50TNT+50TQT 8-40 Application BE1-CDS220...

  • Page 219: Motor Protection Logic

    Basic frequent starting protection is also provided. Virtual control switch logic is used for local or remote control and can be used to replace the equivalent panel control switches. BE1-CDS220 Application 8-41...
  • Page 220 SL-51N=0,0; SL-51Q=1,0 SL-151P=1,/VO7+/243;SL-151N=0,0; SL-151Q=0,0 SL-251P=1,VO8; SL-251N=0,0; SL-251Q=0,0 SL-62=0,0,0 SL-162=0,0,0 SL-BF=0,0,0 SL-GROUP=0,0,0,0,0,0 SL-43=0 SL-143=2 SL-243=2 SL-343=0 SL-443=0 SL-543=0 SL-643=0 SL-743=0 SL-101=0 SL-CKTMON=0,0,0 SL-VOA=0 SL-VO1=VO11 SL-VO2=0 SL-VO3=0 SL-VO4=VO14 SL-VO5=VO15 SL-VO6=0 SL-VO7=IN2*250TPPU*143+50TPPU*/143 SL-VO8=/250TPT*250TPPU SL-VO9=VO13+IN3 SL-VO10=0 SL-VO11=150TPT+50TNT+50TQT+51PT+151PT+251PT+51QT+87RT+VO13 SL-VO12=150TPPU+50TNPU+50TQPU+51PPU+151PPU+251PPU+51QPU+87RPU SL-VO13=VO9*/ARSTKEY SL-VO14=250TPT*51PPU SL-VO15=51QPU 8-42 Application BE1-CDS220...
  • Page 221 SOURCE BE1-CDS220 Out1 CT Input 1 50TQ 50TN Phase Ground Unbalance Loss Fault Speed 251P Switch Overload Locked 150TP 151P Rotor Speed Switch Selector Low/High Inertia Selector 50TP Start Detect High Inertia Start/Running Detect 250TP CT Input 1 DIFF CT Input 2 CT Input 2 D2850-05.vsd...

  • Page 222: Protection Elements

    In the MOTOR scheme, the 150TP protection element provides locked rotor protection for low inertia motors. It is blocked when the motor is running (after the 250TP time setting expires) or when virtual control switch 243 is set to high inertia mode. The 151P protection element provides locked rotor 8-44 Application BE1-CDS220...

  • Page 223: Integration Of Protection, Control, And I/O Elements

    5 to the outside world. It can also be masked to drive an alarm LED, and the alarm display to indicate when the imbalance condition exists. If the imbalance is high enough to time out 51Q, the breaker is tripped through output 1. BE1-CDS220 Application 8-45...

  • Page 224: Low Inertia Motor Start

    SER reports. TRUE when breaker closed. Speed switch, closed at rest. Used to block the 51S locked rotor SPEED- RUNNING STOPPED protection (for high inertia motors) during running. SWITCH-IN2 EMERG-TRIP- Emergency trip. This is an optional input. TRIP NORMAL 8-46 Application BE1-CDS220...
  • Page 225 SWIT set at 85% of locked rotor current. Selector switch to customize the protection for high or low inertia applications. When high is 2 (On/Off) INERTIA-MO HIGH selected, blocks 150TP and enables 151P for locked rotor protection. BE1-CDS220 Application 8-47...
  • Page 226 Restrained diff trip, 50TN ground fault, 50TQ loss of phase, 150TP low inertia locked rotor, 51P VO11 Protective trip expression. PROTECTIVE TRIP NORMAL overload, 51Q unbalance, 151P high inertia locked rotor, 251P Jam, or VO13 Emergency Trip. BESTlogic Expression: VO11=87RT+50TNT+50TQT+150TPT+51PT+51QT+151PT+251PT+VO13 8-48 Application BE1-CDS220...

  • Page 227: Miscellaneous Logic Expressions

    Reporting and Alarm Functions. However, when copying a preprogrammed scheme for modification or direct use, it is important to recognize that these miscellaneous logic expressions will not be effected. These miscellaneous logic settings must be reviewed to ensure desired performance for these functions. BE1-CDS220 Application 8-49...

  • Page 228: Application Tips

    Otherwise, the internal breaker failure function block would be disabled during a known problem in the trip circuit. 8-50 Application BE1-CDS220...

  • Page 229: Close-Circuit Monitor

    500 millisecond time delay to inhibit the momentary alarm that will occur due to the timing difference between the two signals. 0=BREAKER CLOSED 1=BREAKER OPEN (52B) PICKUP TIME DROPOUT TIME 62 TIMER (CLOSE CKT) 0=CLOSE CKT OPEN 1=CLOSE CKT OK VOX=IN1*/INX SL-62=1,VOX S<g>-62=500,0 SL-VOY=62 Figure 8-17. Close Circuit Monitor Logic BE1-CDS220 Application 8-51...

  • Page 230: Block Neutral And Negative Sequence Protection

    This can lead to a mis-operation during periods of load imbalance. The BE1-CDS220 provides a neutral and negative sequence demand function that allows monitoring and alarming to prevent load imbalances.

  • Page 231: Latching A Tripping Contact

    This causes OUT1, OUT2, and OUT3 to close and OUT5 which would be wired in the close circuit, to open. VO7 is sealed in through VO8 and holds the outputs in this condition. The optional front panel HMI BE1-CDS220 Application...
  • Page 232 OPTO VO11 PROT TRIP VO12 PROT PU P0004-08.vsd 08-22-00 Note: For clarity, multiple variables going to the same OR Gate are shown by a single line into the OR Gate. Figure 8-20. Latching a Tripping Contact Example 8-54 Application BE1-CDS220...
  • Page 233 8-20. The user wants to trip and lockout the high side circuit switcher (CSW) for a Sudden Pressure Relay (63_SPR) trip. The SPR trip is to be supervised and sealed in via the BE1-CDS220 relay. Since this is an external function, it is desired that the relay annunciate that the trip came from the SPR instead of an internal protective element.
  • Page 234 This page intentionally left blank. 8-56 Application BE1-CDS220...
  • Page 235 INTRODUCTION ............................ 9-1 Setting Up Password Protection ......................9-1 Figures Figure 9-1. General Operation Screen, Global Security Tab..............9-2 Figure 9-2. General Operation Screen, Global Security Tab with Passwords Shown ......9-2 Tables Table 9-1. Password Protection Settings....................9-3 BE1-CDS220 Security...
  • Page 236 This page intentionally left blank. Security BE1-CDS220...
  • Page 237 Control. Each functional area can be assigned a unique password or one password can be assigned to multiple areas. A global password is used to access all three of the functional areas. BE1-CDS220 passwords are not case sensitive; either lowercase or uppercase letters may be entered. Password security only limits write operations;...
  • Page 238 Control Access. See Figure 9-2. Each access level may be enabled (or not enabled) for COM 0 Front RS232 and HMI, COM 1 Rear RS232, and COM 2 Rear 485. Access levels may also be enabled for multiple ports. Figure 9-2. General Operation Screen, Global Security Tab with Passwords Shown Security BE1-CDS220...

  • Page 239: Security

    A setting of 0 (zero) disables password protection. 0 = Front RS-232 port Multiple ports may be selected by using a Com ports 1 = Rear RS-232 port slash (/) between each port designator. 2 = Rear RS-485 port BE1-CDS220 Security...
  • Page 240 This page intentionally left blank. Security BE1-CDS220...
  • Page 241 Figure 10-1. BE1-CDS220 Current Differential System HMI..............10-1 Figure 10-2. BE1-CDS220 Current Differential System HMI..............10-2 Figure 10-3. BE1-CDS220 Menu Tree (Top Level, All Branches)............10-3 Figure 10-4. BE1-CDS220 Menu Tree (Report Status) ................10-4 Figure 10-5. BE1-CDS220 Menu Tree (Control Branch)................. 10-5 Figure 10-6.
  • Page 242 This page intentionally left blank. Human-Machine Interface BE1-CDS220...

  • Page 243: Section 10 • Human-Machine Interface

    (HMI) and illustrates the front panel display menu tree branches. FRONT PANEL DISPLAY Figure 10-1 shows the standard front panel HMI for a horizontal mount BE1-CDS220 Current Differential System. The vertical mount relay layout has identical functionality. The locators and descriptions of Table 10-1 correspond to the locators shown in figure 10-1.

  • Page 244: Optional Front Panel Display

    OPTIONAL FRONT PANEL DISPLAY Figure 10-2 shows the optional front panel HMI for a horizontal mount BE1-CDS220 Current Differential System. The vertical mount relay layout has identical functionality. The locators and descriptions of Table 10-2 correspond to the locators shown in Figure 10-2.

  • Page 245: Human-Machine Interface

    D2840-11 01-03-06 Figure 10-3. BE1-CDS220 Menu Tree (Top Level, All Branches) 1. REPORT STATUS – Provides display and resetting of general status information such as targets, alarms, and recloser status. Figure 10-4 illustrates the structure of the Report Status menu branch.
  • Page 246 INPUTS 12345678 OUTPUTS A123456 -1234567 ACTIVE GROUP BREAKER_LABEL TIME 2:35:12 XXXXXXXX XXXXXXX XXXXXXXX DATE 05/10/97 CO-OUT A123456 XXXXXXX <TIME >OUT <INPUT >43 <OUT >ACT <43 >BKR <ACT >TIME <BKR >INPUT Figure 10-4. BE1-CDS220 Menu Tree (Report Status) 10-4 Human-Machine Interface BE1-CDS220...
  • Page 247 1 STATE ACTION 1 STATE ACTION 1 STATE 0 STATE 0 STATE 0 STATE 0 STATE NOTUSED NOTUSED NOTUSED NOTUSED <743 >143 <643 >43 <43 >243 <143 >343 D2840-13 08-04-00 Figure 10-5. BE1-CDS220 Menu Tree (Control Branch) BE1-CDS220 Human-Machine Interface 10-5...
  • Page 248 2.000K 2.300K 2.100K 2.300K 0.27 <IN >IB <IA >IC < 12° <133° <255° <NA <I_CAL >I_CAL <I_MEA >I_MEA Alternate labeling if CT's D2840-14 08-04-00 are connected in delta. Figure 10-6. BE1-CDS220 Menu Tree (Metering PRI/SEC Branch) 10-6 Human-Machine Interface BE1-CDS220...
  • Page 249 4.4.1.2 ...\DMD\TODAY\I_ABC ...\DMD\TODAY\IN_IQ IA xxx.xA 15:23 12/31 IN xxx.xA 15:23 12/31 IB xxx.xA 15:23 12/31 IQ xxx.xA 15:23 12/31 IC xxx.xA 15:23 12/31 <I_ABC >I_ABC <IN_IQ >IN_IQ D2840-15 01-26-99 Figure 10-7. BE1-CDS220 Menu Tree (Reports Branch) BE1-CDS220 Human-Machine Interface 10-7...
  • Page 250 2ND HARMONIC INH= 12% NOTE: ENTER CT INFO TAP1=xxxx 5TH HARMONIC INH= 35% BEFORE TAP CALC TAP2=xxxx 2ND HARM SHARE = ON D2840-16 <TAP >MVA <87 >TAP <MVA >87 02-04-99 Figure 10-8. BE1-CDS220 Menu Tree (Protection Branch) 10-8 Human-Machine Interface BE1-CDS220...
  • Page 251 CT CIRCUIT X BKR3 3 PROTOCOL MODBUS <ALARM >ALARM <DUTY >DUTY BAUD RATE 9600 BAUD RATE 9600 BAUD RATE 9600 ADDRESS ADDRESS <COM2 >COM1 <COM0 >COM2 <COM1 >COM0 D2840-17 07-07-99 Figure 10-9. BE1-CDS220 Menu Tree (General Settings Branch) BE1-CDS220 Human-Machine Interface 10-9...
  • Page 252 SG-SCREEN3 = 3.1.1.1 SG-SCREEN11 = 0 SG-SCREEN4 = 3.1.1.2 SG-SCREEN12 = 0 SG-SCREEN5 = 3.1.2 SG-SCREEN13 = 0 SG-SCREEN6 = 3.1.2.1 SG-SCREEN14 = 0 SG-SCREEN7 = 3.1.2.2 SG-SCREEN15 = 0 SG-SCREEN8 = 0 SG-SCREEN16 = 0 10-10 Human-Machine Interface BE1-CDS220...

  • Page 253: Hmi Operations

    UP pushbutton until the 3 is showing. Other settings require scrolling through a list of selections. For example, you would move the cursor over to the CRV field and then scroll through a list of available TCC curves. BE1-CDS220 Human-Machine Interface 10-11...

  • Page 254: Performing Control Operations

    CHANGES SAVED and the Edit LED will go out. If you want to abort the edit session without changing any controls, press the Reset pushbutton before you press the Edit pushbutton the second time. The screen will flash CHANGES LOST and the Edit LED will go out. 10-12 Human-Machine Interface BE1-CDS220...

  • Page 255: Resetting Functions

    5. Once you gain access, it remains in affect for five minutes after the last pushbutton has been pressed. As long as you continue to press the Edit key for a function for which you have gained access, the five-minute timer will be refreshed and you will not be prompted for a password. BE1-CDS220 Human-Machine Interface 10-13...
  • Page 256 This page intentionally left blank. 10-14 Human-Machine Interface BE1-CDS220...
  • Page 257 Alarm Setting Commands....................... 11-15 Breaker Monitor Setting Commands ....................11-17 General Setting Commands ......................11-17 Programmable Logic Setting Commands..................11-19 User Programmable Name Setting Command ................11-20 Protection Setting Commands ......................11-21 Global Commands .......................... 11-22 BE1-CDS220 ASCII Command Interface...
  • Page 258 This page intentionally left blank. ASCII Command Interface BE1-CDS220...

  • Page 259: Section 11 • Ascii Command Interface

    SERIAL PORT Communication connections consist of two Data Communication Equipment (DCE) RS-232 ports, one RS-485 port, and an IRIG port. The BE1-CDS220 communication protocol is compatible with readily available modem/terminal software. If required, password protection provides security against unauthorized operation. Detailed information about making communication connections is provided in Section 12, Installation.

  • Page 260: Ascii Command Interface

    ASCII Command Examples: Example 1. Obtain a breaker operations count by entering RB (Report Breaker). The BE1-CDS220 responds with the operations counter value along with all other breaker report objects. If you know that the object name for the breaker operations counter is OPCNTR, you can enter RB-OPCNTR and read only the number of breaker operations.

  • Page 261: Command Text File Operations

    This list of commands is captured, saved to a file, edited with any ASCII text editor, and then uploaded to the relay. Because the number of relay settings is so large, loading settings with a text file is the preferred method of setting the BE1-CDS220. Embedding Comments into ASCII Text Files Adding comments to ASCII settings files is an easy way to organize and label your settings.

  • Page 262: Exit Command

    Three options, Y, N, or C are available. Entering Y will save the data. If N is entered, the relay will clear the changes and resume operating with the old settings. Entering C will abort the EXIT command and allow programming to continue. 11-4 ASCII Command Interface BE1-CDS220...
  • Page 263 It can be used at the end of a programming session to make a record of the relay settings. If saved in a file, the report can be sent to another BE1-CDS220 that will use the same settings. Because the report that is created is a set of commands, sending the report to a different relay re-programs that relay with the settings contained in the S report.
  • Page 264 Read all Protection settings Syntax: S{g} where g=setting group 0-3 or # for all groups Example: S# or S0 or S1 S <g> Command Example: Example 1. Obtain a list of settings for Setting Group 1. 11-6 ASCII Command Interface BE1-CDS220...
  • Page 265 >SL:BASIC-87 SL-N:BASIC-87 SL-87:1,0 SL-87ND:0,0 SL-50TP:0,0; SL-50TN:0,0; SL-50TQ:0,0 SL-150TP:0,0; SL-150TN:0,0; SL-150TQ:0,0 SL-250TP:0,0; SL-250TN:0,0; SL-250TQ:0,0 SL-51P:1,0; SL-51N:1,0; SL-51Q:1,0 SL-151P:0,0; SL-151N:0,0; SL-151Q:0,0 SL-251P:0,0; SL-251N:0,0; SL-251Q:0,0 SL-62:0,0,0 SL-162:0,0,0 SL-BF:0,0,0 SL-GROUP:1,0,0,0,0,/0 SL-43:0 SL-143:0 SL-243:0 SL-343:0 SL-443:0 SL-543:0 SL-643:0 SL-743:0 SL-101:0 BE1-CDS220 ASCII Command Interface 11-7...
  • Page 266 1 and 9600, A0, P0, R1, X0 for COM 2. SG-COM Command Example: Example 1. Program front port for 1200 baud >SG-COM0=1200 Example 2. Read the protocol setting for the rear RS-485 port. >SG-COM2 19K, A156,P0,R1,X0 11-8 ASCII Command Interface BE1-CDS220...

  • Page 267: Command Summary

    Section 5, Metering M1-I Command Purpose: Read CT circuit #1 current primary or secondary units Syntax: M1[-I[p][y]] where p = A/B/C/N/Q, y=P for primary, S for secondary Example: M1 or M1-I or M1-IA Reference: Section 5, Metering BE1-CDS220 ASCII Command Interface 11-9...

  • Page 268: Control Commands

    CO-GROUP=2 or CO-OUT1=1 or CO-43=P Reference: Section 3, Input and Output Functions, Outputs (CO-OUT) Section 4, Protection and Control, Setting Groups (CO-GROUP) Section 4, Protection and Control, Virtual Switches (CO-43) Section 4, Protection and Control, Virtual Switches (CO-101) 11-10 ASCII Command Interface BE1-CDS220...

  • Page 269: Report Commands

    Reference: Section 6, Reporting and Alarm Functions, Alarms Function RA-SER Command Purpose: Report Relay Alarm Sequence of Events information Syntax: RA-SER Example: RA-SER Reference: Section 6, Reporting and Alarm Functions, Sequence of Events Recorder Function BE1-CDS220 ASCII Command Interface 11-11...
  • Page 270 Section 6, Reporting and Alarm Functions, Demand Functions RD-LOG Command Purpose: Report load profile data Syntax: RD-LOG,<n> Example: RD-LOG,23 (view load profile record for last 23 records) Reference: Section 6, Reporting and Alarm Functions, Demand Functions 11-12 ASCII Command Interface BE1-CDS220...
  • Page 271 RG-DATE=12/31/96 or RG-DATE=31-12-96 (Format set by SG-CLK Command) Reference: Section 6, Reporting and Alarm Functions, General Status Reporting RG-GRPACTIVE Command Purpose: Report active group Syntax: RG-GRPACTIVE Example: RG-GRPACTIVE Reference: Section 6, Reporting and Alarm Functions, General Status Reporting BE1-CDS220 ASCII Command Interface 11-13...
  • Page 272 RL Command Purpose: Read Logic Variables (each Logic Variable is 32 bits long) Syntax: RL-[n] where n = 1, 2 or 3 Example: RL or RL-1 Reference: Section 6, Reporting and Alarm Functions, General Status Reporting 11-14 ASCII Command Interface BE1-CDS220...

  • Page 273: Setting Command

    Section 11, ASCII Command Interface, Settings (S) Command Descriptions Alarm Setting Commands SA Command Purpose: Read all alarm settings for Major, Minor and Logic alarms Syntax: Example: Reference: Section 6, Reporting and Alarm Functions, Alarms Function BE1-CDS220 ASCII Command Interface 11-15...
  • Page 274 Section 6, Reporting and Alarm Functions, Alarms Function SA-TX Command Purpose: Read/Set transformer alarm settings Syntax: SA-TX[n][={mode},{alarm limit}] where mode=0-2(disabled/%duty/#thflts) Example: SA-TX or SA-TX1=1,80 or SA-TX=2,250 Reference: Section 6, Reporting and Alarm Functions, Transformer Monitoring 11-16 ASCII Command Interface BE1-CDS220...
  • Page 275 Section 3, Input and Output Functions, Power System Inputs SG-DI Command Purpose: Read/Set demand current interval Syntax: SG-DI[p][={interval},{method},{ct ckt#}] where p=P/N/Q, method=T,B,S Example: SG-DI or SG-DIP=15,T,1 or SG-DIN=1,T,2 Reference: Section 6, Reporting and Alarm Functions, Demand Functions BE1-CDS220 ASCII Command Interface 11-17...
  • Page 276 Section 4, Human-Machine Interface, Front Panel Display SG-SGCON Command Purpose: Read/Set SGC output on time Syntax: SG-SGCON[={time}] where time is in (s)ec Example: SG-SGCON or SG-SGCON=1S or SG-SGCON = 5S Reference: Section 4, Protection and Control, Setting Groups 11-18 ASCII Command Interface BE1-CDS220...
  • Page 277 Section 7, BESTlogic Programmable Logic, Working With Programmable Logic SL-101 Command Purpose: Read/Set Logic for Virtual Breaker switch (101) Syntax: SL-101[=mode] where mode=0/1 (disabled/enabled) Example: SL-101 or SL-101=0 or SL-101=1 Reference: Section 4, Protection and Control, Voltage Protection BE1-CDS220 ASCII Command Interface 11-19...
  • Page 278 User Programmable Name Setting Command SN Command Purpose: Read/Set User Programmable Names Syntax: SN[-{var}[={name},{TRUE label},{FALSE label}] Example: SN or SN-VO1=TRIP,CLOSED,OPEN or SN-IN1=BREAKER,OPEN,CLOSED Reference: Section 7, BESTlogic Programmable Logic, User Input and Output Logic Variable Names 11-20 ASCII Command Interface BE1-CDS220...
  • Page 279 SP-BF or SP-BF=50m or SP-BF=3c Reference: Section 4, Protection and Control, BF Breaker Failure Protection SP-CURVE Command Purpose: Read/Set the user programmable 51 curve parameters Syntax: SP-CURVE[={A},{B},{C},{N},{R}] Example: SP-CURVE or SP-CURVE=1.0,0,0,2.5,0 Reference: Section 4, Protection and Control, Overcurrent Protection BE1-CDS220 ASCII Command Interface 11-21...

  • Page 280: Global Commands

    ST-DUTY=1,60E3,1,IN5 Reference: Section 6, Reporting and Alarm Functions, Transformer Duty Monitoring Global Commands GS-PW Command Purpose: Read/Set Password and password access port(s) Syntax: GS-PW[{t}[={password},{com ports(0/1/2)}]] where t=G/S/C/R Example: GS-PWG=TEST,0 or GS-PWS=XYZ,1/2 Reference: Section 9, Security 11-22 ASCII Command Interface BE1-CDS220...
  • Page 281 Figure 12-16. Typical Transformer Differential Connection..............12-12 Figure 12-17. Typical Connection for Motor or Reactor Differential Protection........12-13 Figure 12-18. BE1-CDS220 Connected for Primary Protection with a BE1-951 Connected for Independent Backup and Metering ...................... 12-14 Figure 12-19. Differential Protection for Wye-Grounded-Delta Transformer with Ground Source inside the Protected Zone........................
  • Page 282 Figure 12-28. Personal Computer to BE1-CDS220................12-26 Figure 12-29. Modem to BE1-CDS220 ....................12-26 Figure 12-30. RFL9660 Protective Relay Switch to BE1-CDS220 Cable..........12-26 Figure 12-31. SEL 2020 to BE1-CDS220 Relay..................12-27 Figure 12-32. RS-485 DB-37 to BE1-CDS220 ..................12-28 Tables Table 12-1.
  • Page 283 Basler Electric Regional Sales Office, your sales representative, or a sales representative at Basler Electric, Highland, Illinois. If the BE1-CDS220 is not installed immediately, store it in the original shipping package in a moisture and dust free environment.
  • Page 284 Figure 12-1. Contact Sensing Input Jumper Locations REGISTRATION OF RELAY End users are encouraged to register their relays with Basler Electric. A label on each relay directs users to complete registration on-line at http://www.basler.com/register. Registering your relays(s) with Basler Electric will give you Internet access to the latest BESTCOMS software and firmware updates for your devices.

  • Page 285: Installation

    Horizontal panel mounting configurations have the same dimensions except that they are in a horizontal arrangement. Figure 12-6 shows the locations of holes for the Basler, GE, and Westinghouse unit relay cases (vertical panel mount only). Figure 12-8 (horizontal or vertical panel mount) shows the locations of the studs used for mounting.
  • Page 286 01-05-06 .150 (3.81) 7.75 (196.85) 8.85 (224.79) Figure 12-4. MX Case, 19-Inch Rack Mount, Side View, Overall Dimensions 5.40 (137.16) 7.75 (196.85) D2837-06 01-08-99 8.70 (220.98) Figure 12-5. MX Case, Vertical Panel Mount, Top View, Overall Dimensions 12-4 Installation BE1-CDS220...
  • Page 287 .250 TYP. 5.563 (6.35) (141.30) .250 DIA. HOLES (18 PLC'S) WESTINGHOUSE FT31 or FT32 .225 TYP.(5.72) Hole Pattern (4 PLC'S) BASLER M1 .975 TYP. 4 PLC'S) (24.77) 1.344 TYP. (34.14) G.E. M2 1.938 TYP. (49.23) (4 PLC'S) G.E. M1 (4 PLC'S) 5.19 TYP.
  • Page 288 1.00 (25.4) .075 TYP. .940 TYP. (1.91) (23.88) 14.50 14.32 (368.3) (363.73) D2837-05 06-22-00 Figure 12-7. MX Case, Vertical Panel Mount, Side View, Overall Dimensions 12-6 Installation BE1-CDS220...
  • Page 289 Figure 12-8. MX Case, Horizontal Panel Mount, Front View, Overall Dimensions BE1-CDS220 Installation 12-7...
  • Page 290 Figure 12-9. MX Case, Vertical Panel Mount, Panel Drilling Diagram NOTE The dimensions of the panel drilling diagram are for the MX case, vertical panel mount or the MX case, horizontal panel mount. Rotate this drawing ninety degrees for the MX case, horizontal panel mount. 12-8 Installation BE1-CDS220...
  • Page 291 Section 1, General Information, before connecting and energizing a particular relay. Terminal Blocks There are two sizes of terminal blocks used on the BE1-CDS220. Terminals B1 through B16 are for current inputs and use 8-32 pan head (Phillips) screws with a lock washer. The remaining terminals use 6-32 pan head (Phillips) screws with no washer.
  • Page 292 AØ BØ CØ BE1-CDS220 Transformer P0001-01 07-21-00 Figure 12-11. Typical AC Connection Diagram CONTROL POWER Part of BE1-CDS POWER SUPPLY CONTROL POWER ALARM Part of BE1-CDS P0001-13 06-07-00 Figure 12-12. Typical DC Connection Diagram 12-10 Installation BE1-CDS220...
  • Page 293 CT Polarity CT polarity is critical to the proper operation of the BE1-CDS220. The sidebar below provides fundamental information on CT polarity and protective relays. Sidebar: Current Circuit Polarity By ANSI convention, Current Transformer Polarity will face away from the protected winding of a transformer, motor, generator, or reactor and away from the contacts in a circuit breaker.
  • Page 294 ) operates on internally calculated residual (3I0) current. For complete metering and independent backup protection, add a BE1-951 Overcurrent Protection System with the BE1-CDS220 (see the following figure for a connection diagram). To add only metering to the BE1-CDS220, connect a BE1-MMS100.
  • Page 295 ) operates on internally calculated residual (3I0) current. For complete metering and independent backup protection for motors and reactors, add a BE1-951 Overcurrent Protection System with the BE1-CDS220 (similar to Figure 12-16). To add only metering to the BE1-CDS220, connect a BE1-MMS100.
  • Page 296 AØ BØ CØ Circuit Switcher BE1-951 Optional BE1-CDS220 Transformer Optional Low Side Breaker P0001-03 06-20-00 AØ BØ CØ Figure 12-18. BE1-CDS220 Connected for Primary Protection with a BE1-951 Connected for Independent Backup and Metering 12-14 Installation BE1-CDS220...
  • Page 297 Optional independent ground input can be connected for low side ground faults. For more information on case connections, refer to the BE1-951 Instruction Manual, Section 12, Installation. Shown with separate, overlapping CT for independent backup protection. P0001-04 09-21-00 BE1-CDS220 Installation 12-15...
  • Page 298 ) operates on internally calculated residual (3I0) current. For complete metering and independent backup protection, add a BE1-951 Overcurrent Protection System with the BE1-CDS220 (refer to Figure 12-18 for a connection diagram). To add only metering to the BE1-CDS220, connect a BE1-MMS100.
  • Page 299 ) operates on internally calculated residual (3I0) current. For complete metering and independent backup protection, add a BE1-951 Overcurrent Protection Element with the BE1-CDS220 (refer to Figure 12-18 for a connection diagram). To add only metering to the BE1-CDS220, connect a BE1-MMS100.
  • Page 300 ) operates on internally calculated residual (3I ) current. For complete metering and independent backup protection, add a BE1-951 Overcurrent Protection System with the BE1-CDS220 (refer to Figure 12-18 for a connection diagram). To add only metering to the BE1-CDS220, connect a BE1-MMS100. When I...
  • Page 301 ) operates on internally calculated residual (3I0) current. For complete metering and independent backup protection, add a BE1-951 Overcurrent Protection Element with the BE1-CDS220 (refer to Figure 12-18 for a connection diagram). To add only metering to the BE1-CDS220, connect a BE1-MMS100.
  • Page 302 Figure 12-23. Depiction of BE1-CDS220 with Optional Independent Ground Input Connected for 87ND Protection, Balanced, Normal Load Flow, IR’s Cancel, and Iop = 0.
  • Page 303 For complete metering and independent backup protection, use a BE1-951 Overcurrent Protection System with the BE1-CDS220. A BE1-951 on the Bus Source Breaker can also be used in conjunction with Feeder BE1-851 or BE1-951 relays to create a high speed bus interlocking protection scheme. To add only metering to the BE1- CDS220, connect a BE1-MMS100.
  • Page 304 ) connected for backup ground fault protection. VTX connected for third harmonic detection. Figure 12-25. Large Generator Protection with BE1-CDS220 Connected for Primary Current Differential Protection, and BE1-GPS100 Connected for Independent Backup Fault Protection, Detection of Abnormal Situations, and Metering...
  • Page 305 ) operates on internally calculated residual (3I0) current. For complete metering and independent backup protection, add a BE1-951 Overcurrent Protection Element with the BE1-CDS220 (refer to Figure 12-18 for a connection diagram). To add only metering to the BE1-CDS220, connect a BE1-MMS100.
  • Page 306 ) operates on internally calculated residual (3I0) current. For complete metering and independent backup protection, add a BE1-951 Overcurrent Protection Element with the BE1-CDS220 (refer to Figure 12-18 for a connection diagram). To add only metering to the BE1-CDS220, connect a BE1-MMS100.
  • Page 307 PREPARING THE RELAY FOR SERVICE Basler microprocessor-based protection systems are similar in nature to a panel of electromechanical or solid-state component relays. Both must be wired together with inputs, outputs, and have operating settings applied. Logic settings determine which protection elements are electronically wired to the inputs and outputs of the device.
  • Page 308 50 FEET MAX. 06-23-00 Figure 12-29. Modem to BE1-CDS220 TO BE1-CDS RFL 9660 REAR PORT FEMALE DB-9, DCE N.C. MATING CONNECTOR N.C. SGND N.C. D2839-01 06-23-01 N.C. N.C. N.C. Figure 12-30. RFL9660 Protective Relay Switch to BE1-CDS220 Cable 12-26 Installation BE1-CDS220...
  • Page 309 NOTE The RS-232 communication ports are not equipped with Request to Send (RTS) and Clear to Send (CTS) control lines. The makes the BE1-CDS220 incompatible with systems that require hardware handshaking or systems that use self- powered RS-232 to RS-485 converters connected to the RS-232 ports.
  • Page 310 D2839-04 RESISTOR (120 OHMS TYP.) 06-23-00 Figure 12-32. RS-485 DB-37 to BE1-CDS220 IRIG Input and Connections The IRIG input is fully isolated and supports IRIG Standard 200-98, Format B002. The demodulated (dc level-shifted) input signal must be 3.5 volts or higher to be recognized as a high logic level. The maximum acceptable input voltage range is +10 volts or -10 volts (a 20 volt range).
  • Page 311 In Service Current Circuit Verification ..................... 13-23 Test Scenarios ..........................13-23 PERIODIC TESTING.......................... 13-27 Settings Verification ........................13-27 Digital I/O Connection Verification ....................13-27 Analog Circuit Verification....................... 13-27 UPDATING FIRMWARE AND SOFTWARE..................13-28 Updating Relay Firmware ....................... 13-28 BE1-CDS220 Testing And Maintenance...
  • Page 312 Figure 13-17. x62 Mode 1 (Pickup/Dropout) Timing Example ............... 13-64 Figure 13-18. x62 Mode 2 (One-Shot Nonretriggerable) Timing Example..........13-65 Figure 13-19. x62 Mode 3 (One-Shot Retriggerable) Timing Example..........13-66 Figure 13-20. x62 Mode 5 (Integrating) Timing Example............... 13-67 Testing And Maintenance BE1-CDS220...
  • Page 313 Table 13-51. Time Overcurrent 51 Element Test Settings..............13-56 Table 13-52. Time Overcurrent 51 Element Test Values............... 13-57 Table 13-53. BF Pickup Test Commands ....................13-58 Table 13-54. BF Current Detector Dropout Settings ................13-58 Table 13-55. BF Dropout Limits ......................13-58 BE1-CDS220 Testing And Maintenance...
  • Page 314 Sidebar 13-7. Average Restraint When Decreasing One Input from Balance ........13-38 Sidebar 13-8. Determining the Operating Point on the Curve..............13-41 Sidebar 13-9. Auto Tap Compensation....................13-48 Sidebar 13-10. Negative Sequence Overcurrent Element Pickup ............13-53 Testing And Maintenance BE1-CDS220...

  • Page 315: General

    However, it remains material that you perform these basic acceptance tests to verify the device has not suffered any degradation in transit. Basler Electric warrants all products against any decay in performance outside of the published specified tolerances that result from problems created during transit.

  • Page 316: Functional Testing

    Basler Electric and your test equipment manufacturer. TESTING AND TROUBLESHOOTING AIDS Under test or in-service, the BE1-CDS220 provides several ways to check operations, targets, or events. A continuous self-test monitors the system health and status. The most basic reporting function is targets.

  • Page 317: Status And Event Reporting Features

    ACCEPTANCE TESTING Although Basler Electric performs detailed acceptance testing on all new relays, it is generally recommended that you perform each of the following acceptance test steps when you receive the relay.

  • Page 318: Communications

    Purpose: To verify that the BE1-CDS relay communicates through all ports. Reference Commands: ACCESS, EXIT To communicate with the BE1-CDS220 through any of the three ports, you may use either a VT-100 terminal or a personal computer (PC) with a serial port and suitable communications software. The relay communication default settings are: •...

  • Page 319: Style Number And Serial Number Verification

    The commissioning tests later in this Section overlap these tests and verify proper contact sensing input and control output changes. Contact Sensing Inputs and Control Outputs Purpose: To verify that the BE1-CDS relay senses hardware inputs and activates contact outputs. Reference Commands: ACCESS, CO-OUT, CS-OUT, EXIT, RG-STAT BE1-CDS220 Testing And Maintenance 13-5...

  • Page 320: Testing And Maintenance

    C3 and C4 CS-OUT1=P,CO-OUT1=P OUT2 (N.O.) C5 and C6 CS-OUT2=P,CO-OUT2=P OUT3 (N.O.) C7 and C8 CS-OUT3=P,CO-OUT3=P OUT4 (N.O.) C9 and C10 CS-OUT4=P,CO-OUT4=P OUT5 (N.O.) C11 and C12 CS-OUT5=P,CO-OUT5=P OUT6 (NC/NO) C13, C14, and C15 CS-OUT6=P,CO-OUT6=P 13-6 Testing And Maintenance BE1-CDS220...
  • Page 321 ± ± 5.0 A ( 1%) @ 0 15.0 A ( 1%) @ 0° 0.0 A ( ± ± ± 1.0 A ( 1%) @ 0 3.0 A ( 1%) @ 0° 0.0 A ( BE1-CDS220 Testing And Maintenance 13-7...

  • Page 322: Commissioning Testing

    Refer to the other Sections of the instruction manual for assistance on any particular functions of the relay. If you require further assistance, contact Basler Electric field application personnel or the factory. Protection and Control Function Verification...

  • Page 323: Testing Phase Differential Protection With Internal Compensation

    87 Phase element. See Sidebar 13-1 for more information on testing and compensated currents. The following test procedures will enable you to determine the test points and which phases will be tested. BE1-CDS220 Testing And Maintenance 13-9...
  • Page 324 Table 13-11 and Figures 13-4 to 13-11. Tables 13-8 through 13-10 also show what equation to use to calculate the test points for the minimum pickup (minpu) and slope tests for each possible configuration of compensation. 13-10 Testing And Maintenance BE1-CDS220...
  • Page 325 The test current will be a function of the internal angle and zero sequence compensation and the tap compensation. For the following test, you will apply a single-phase test current to one CT input circuit at a BE1-CDS220 Testing And Maintenance...

  • Page 326: Phase Differential Restrained Slope Trip

    Step 4-1. Select and record the appropriate test connection from Table 13-11. Step 4-2. Calculate the balanced starting test currents that are to be applied to each input circuit of the relay. Use the appropriate equation from Table 13-11, Test Current, and record values before 13-12 Testing And Maintenance BE1-CDS220...
  • Page 327 I1 = I2 - min pu Decrease I1 I1 = I2 Average I2<min pu(1/slope - 1/2) I1 = I2(1 + (2*slope/(2-slope))) I1 = I2 + min pu Increase I1 D2857-09.vsd 10-08-99 Figure 13-3. Test Currents for Restrained Trip Test BE1-CDS220 Testing And Maintenance 13-13...
  • Page 328 13-10, A WYE/G 2*√3*tap 2*tap 13-10, B WYE/G 2*√3*tap 2*tap 13-10, C 2*√3*tap 2*√3*tap 13-11, A 2*√3*tap 2*√3*tap 13-11, B 2*√3*tap 2*√3*tap 13-11, C 2*√3*tap 2*√3*tap 13-4, A 2*√3*tap 2*√3*tap 13-4, B 2*√3*tap 2*√3*tap 13-4, C 13-14 Testing And Maintenance BE1-CDS220...
  • Page 329 D2857-26.vsd 05-05-00 Figure 13-4. Test Connection Diagrams for Table 13-11 D2857-27.vsd 05-05-00 Figure 13-5. Test Connection Diagrams for Table 13-11 D2857-28.vsd 05-05-00 Figure 13-6. Test Connection Diagrams for Table 13-11 BE1-CDS220 Testing And Maintenance 13-15...
  • Page 330 D2857-29.vsd 05-05-00 Figure 13-7. Test Connection Diagrams for Table 13-11 D2857-30.vsd 05-05-00 Figure 13-8. Test Connection Diagrams for Table 13-11 D2857-31.vsd 05-05-00 Figure 13-9. Test Connection Diagrams for Table 13-11 13-16 Testing And Maintenance BE1-CDS220...
  • Page 331 It will also depend upon whether the Iop (differential current) is to be developed by increasing one current source from balance or by decreasing one current source from balance. BE1-CDS220 Testing And Maintenance 13-17...

  • Page 332: Phase Differential Unrestrained Trip

    Purpose: To verify contact sensing input settings and connections Reference Commands: SN-IN, SG-IN Step 1. Verify contact sensing input settings. • Transmit the SN-IN1 command to verify the input 1 user-defined name, TRUE label, and FALSE label. 13-18 Testing And Maintenance BE1-CDS220...

  • Page 333: Output Contacts

    ACCESS=, CS-OUT=DIS, CO-OUT=DIS, EXIT, and YES to the relay. Table 13-12. Output Control Override Commands Output Terminals Commands ALARM (N.C.) C1 and C2 CS-OUTA=P,CO-OUTA=P OUT1 (N.O.) C3 and C4 CS-OUT1=P,CO-OUT1=P OUT2 (N.O.) C5 and C6 CS-OUT2=P,CO-OUT2=P OUT3 (N.O.) C7 and C8 CS-OUT3=P,CO-OUT3=P BE1-CDS220 Testing And Maintenance 13-19...
  • Page 334 CS-101=T (Trip) or C (Close) followed by CO-101=T (Trip) or C (Close). The syntax of the CS-101 and CO-101 commands must match or the CO-101 command won’t be executed. Step 5. Verify the switch position change as you did in Step 3. 13-20 Testing And Maintenance BE1-CDS220...

  • Page 335: Reporting And Alarm Functions

    ASCII commands RA or RG-STAT. To clear (reset) a relay trouble alarm, first gain write access to the reporting functions (R password) and then initiate the RA=0 or RA-REL=0 commands or press the RESET key while the optional front panel HMI screen 1.2, \STAT\ALARMS\ALARM screen is displayed. BE1-CDS220 Testing And Maintenance 13-21...

  • Page 336: Major/Minor/Logic Programmable Alarms

    SER registers, first gain write access to the reporting functions (R password) and then initiate the RS- NEW=0 command. Purpose: To verify that all SER registers are cleared before initially loading the system. Reference Commands: RS, RS-NEW=0 13-22 Testing And Maintenance BE1-CDS220...

  • Page 337: System Report Documentation

    Everything is correct and there is no differential alarm or trip. There is a problem with the settings or installation but the initial loading is too low so there is no differential alarm or trip. BE1-CDS220 Testing And Maintenance 13-23...
  • Page 338 The magnitude and angle of the currents recorded in the fault summary report at the time of the trip can be entered into this spreadsheet along with the pertinent differential and connections settings. The spreadsheet will then calculate the differential currents after compensation which makes it easier to diagnose and correct the problem.
  • Page 339 TAP COMP I CT CKT1: 0.28 @ 0 0.27 @ 240 0.27 @ 121 CT CKT2: 0.28 @ 181 0.28 @ 61 0.27 @ 302 IOP: 0.01 *TAP 0.01 *TAP 0.01 *TAP SLOPE RATIO > BE1-CDS220 Testing And Maintenance 13-25...
  • Page 340 — The lines marked Polarity, Angle Comp, and Mismatch will report Alarm or OK as determined by the current circuit diagnostic function if the currents are above the minimum sensitivity. The diagnostic function for these lines operates even if the differential current is not above the alarm threshold. 13-26 Testing And Maintenance BE1-CDS220...

  • Page 341: Periodic Testing

    Redundant relays and/or metering devices can provide this source of independent conformation of the measured signals. If the relay is connected to an integration system, this can even be automated and done on a routine basis. BE1-CDS220 Testing And Maintenance 13-27...

  • Page 342: Updating Firmware And Software

    Basler Electric, then that CD-ROM will contain firmware and the corresponding version of BESTCOMS software. BESTCOMS can also be downloaded from the Basler Electric web site (http://www.basler.com). An on line form can be completed to obtain a password for downloading BESTCOMS from the Basler Electric web site.
  • Page 343 = 1 (yes) Exit Save settings Step 4. Apply current to phase A, input 1 and slowly ramp up until OUT1 closes. The relay should pickup at a value of minimum pickup x TAP (see Figure 13-12). BE1-CDS220 Testing And Maintenance 13-29...
  • Page 344 4% of setting or 25 milliamperes whichever is greater Step 6. Decrease the phase A, input 1 current until the relay drops out. Remove current. NOTE Testing all inputs at various sensitivity settings is optional. 13-30 Testing And Maintenance BE1-CDS220...
  • Page 345 See Figure 13-13 for a connection diagram. An ohm-meter or continuity tester may be used to monitor output contact status. Step 2. Send the commands listed in Table 13-17 to the relay to prepare the 87 elements for pickup testing. BE1-CDS220 Testing And Maintenance 13-31...
  • Page 346 Either characteristic may be selected via the S<g>-87 command. For more information on the S<g>-87 command, refer to Section 4, Protection and Control Functions, Differential Protection. 13-32 Testing And Maintenance BE1-CDS220...
  • Page 347 ))in per unit Sidebar 13-3, Equation 1 1trip 1balance with the minimum trip point established as + minpu in per unit Sidebar 13-3, Equation 2 1trip min 1balance where: minpu is the minimum pickup setting BE1-CDS220 Testing And Maintenance 13-33...
  • Page 348 Maximum Restraint Characteristic Example You may also use the maximum restraint operating characteristic and test the relay by decreasing one current from a balanced condition. For additional information on testing in this manner, see Sidebar 13-4. 13-34 Testing And Maintenance BE1-CDS220...
  • Page 349 ± 4% of setting or 75 milliamperes (whichever is larger) for 5 ampere sensing inputs and ± 4% of setting or 25 milliamperes (whichever is larger) for 1 ampere sensing inputs. BE1-CDS220 Testing And Maintenance 13-35...
  • Page 350 Step 12, otherwise go back to Step 4 to test for the maximum restraint operating characteristic. For more information on testing using the average restraint operating characteristic, see Sidebar 13-5 and Sidebar 13-6. 13-36 Testing And Maintenance BE1-CDS220...
  • Page 351 Equation 1, or if − restraint at balance   slope       < minpu x in per unit, use Equation 2. − restraint at balance   slope BE1-CDS220 Testing And Maintenance 13-37...
  • Page 352 A similar analysis can be made for changing input 2 current. By decreasing the input current I from balance, the value of I is defined as: 1trip slope slope (1- ((2* )/(2+ ))) in per unit 1trip 2balance 13-38 Testing And Maintenance BE1-CDS220...
  • Page 353 ± 0.35 2.00 3.80 3.16 0.126 2.40 0.096 ± ± 0.35 10.00 19.00 15.81 0.632 12.03 0.481 ± ± 0.35 2.00 3.80 3.71 0.148 2.04 0.096 ± ± 0.35 10.00 19.00 18.57 0.743 10.22 0.409 BE1-CDS220 Testing And Maintenance 13-39...
  • Page 354 Restrained Time Verification A timing circuit or a contact monitor with timing algorithm must be used to time the output contact status change. For more information on determining the minimum pickup current, see Sidebar 13-8. 13-40 Testing And Maintenance BE1-CDS220...
  • Page 355 2 to 3.05 amps. Apply the step change in current to input 2 and record the time interval between the time the step change was initiated to the time OUT1 output contact closes (the restrained trip (87RT)). Step 5. Reduce the current to input 2 until OUT1 contact opens. BE1-CDS220 Testing And Maintenance 13-41...
  • Page 356 1 source 2 Figure 13-14. Connection for Harmonic Restraint Verification Step 2. Send the commands listed in Table 13-29 to the relay to setup a test of the pickup of the second harmonic restraint elements. 13-42 Testing And Maintenance BE1-CDS220...
  • Page 357 (Optional) Repeat Steps 2 through 8 for setting groups 1 through 3 using the CS/CO-GROUP command to change setting groups. Fifth Harmonic Restraint Verification Purpose: To verify the operation of the 5 harmonic restraint function of the 87 element. Reference Commands: SL-87, S(n)-87, S(n)-TAP87, SL-VO, SG-CT BE1-CDS220 Testing And Maintenance 13-43...
  • Page 358 (Optional) Repeat Steps 2 through 8 for setting groups 1 through 3 using the CS/CO-GROUP command to change setting groups. Unrestrained Pickup Verification Purpose: To verify the accuracy of the unrestrained operation of the 87 element. Reference Commands: SL-87, SL- VO, SG-CT, S(n)-87, S(n)-TAP87 13-44 Testing And Maintenance BE1-CDS220...
  • Page 359 Unrestrained Time Verification A timing circuit or a contact monitor with timing algorithm must be used to time the output contact status change. For more information on determining the minimum pickup current, refer to Sidebar 13-8. BE1-CDS220 Testing And Maintenance 13-45...
  • Page 360 Function Differential current Time Unrestrained trip 1.5 times pu Less than 2 cycles Unrestrained trip 5 times pu Less than 1 cycle Step 11. (Optional) Repeat steps 1 through 10 for phases B and C. 13-46 Testing And Maintenance BE1-CDS220...
  • Page 361 2 ctr=1, ct=wye, xfmr=na, no grd source SG-CTG=1 gnd input ctr=1 SG-TRIGGER=87NDT, Enable 87NDT to log and trigger fault recording 87NDPU,0 S#-87ND=0.1,15,50m Minpu = 0.1, slope = 15%, 50 ms (minimum time delay) Exit Save settings BE1-CDS220 Testing And Maintenance 13-47...
  • Page 362 Connect one current source to terminals B9 and B10 (A-phase input 2) and a second source at to terminals B7 and B8 (ground input). See Figure 13-16. An ohm-meter or continuity tester may be used to monitor output contact status. 13-48 Testing And Maintenance BE1-CDS220...
  • Page 363 CT ratios for the designated phase CTs and the ground CT. Since CTR2 and CTRG are both equal to 1:1 for this test, the TAPN and TAPG values are both equal to the minimum settings for either 5 ampere or 1 ampere relays (2.0 and 0.4 respectively). BE1-CDS220 Testing And Maintenance 13-49...
  • Page 364 0.040 0.16 0.025 ± ± 0.35 2.00 2.00 5.00 0.200 0.80 0.032 Instantaneous Overcurrent Pickup and Dropout Verification (50T/150T/250T) Purpose: To verify the accuracy of the operation of the 50T/150T/250T elements. Reference Commands: SL-50T/150T/250T, SL-GROUP, SL-VO 13-50 Testing And Maintenance BE1-CDS220...
  • Page 365 Slowly ramp up current on the phase A input until OUT1, OUT2, and OUT3 close. (In accordance with Note 1 for Table 13-41, OUT3 will not close when 50TQ is disabled.) Verify that pickup occurred within the specified accuracy of the relay as listed in Table 13-42. BE1-CDS220 Testing And Maintenance 13-51...
  • Page 366 \PROT\SGn\50T\50T, where n is equal to the setting group you desire. Refer to the CS/CO- GROUP command in Section 4, Protection and Control Functions for more information on changing the active setting group. 13-52 Testing And Maintenance BE1-CDS220...
  • Page 367 Under balanced conditions, this value would be zero. If a single-phase input is applied, then a negative ÷ 3 . sequence quantity will appear to the relay. If we let I = 0, then, I BE1-CDS220 Testing And Maintenance 13-53...
  • Page 368 Pickup Accuracy - Phase and Neutral ± ± A or B (1 ampere nominal systems) 2% of setting or 10 milliamperes ± ± D, E, or F (5 ampere nominal systems) 2% of setting or 50 milliamperes 13-54 Testing And Maintenance BE1-CDS220...
  • Page 369 Section 4, Protection and Control Functions for more information on changing the active setting group. To change from group 0 to group 1, execute the following commands. CS-GROUP=1 select setting group 1 CO-GROUP=1 execute setting group 1 BE1-CDS220 Testing And Maintenance 13-55...
  • Page 370 Step 5. After each pickup occurs, slowly ramp current down until OUT1, OUT2, and OUT3 open. ± Dropout should occur at 95% 13-56 Testing And Maintenance BE1-CDS220...
  • Page 371 Breaker Failure Purpose: To verify the operation of the breaker failure (BF) function. Reference Commands: SL-BF, SP-BF Step 1. Prepare the BF function block for testing by transmitting the commands in Table 13-53 to the relay. BE1-CDS220 Testing And Maintenance 13-57...
  • Page 372 Apply nominal current to phase A for 4 cycles (67 ms at 60 Hz). No trip should occur. Apply nominal current to phase A for 5 cycles. (83 ms at 60 Hz). No trip should occur. 13-58 Testing And Maintenance BE1-CDS220...
  • Page 373 Transmit the commands in Table 13-58 to the relay or, if the optional HMI is supplied, navigate to screen \CTRL\43\43 to set the mode of the 43 switch to the TRUE state (logic 1). Result: OUT1 contact closes and remains closed. BE1-CDS220 Testing And Maintenance 13-59...
  • Page 374 Send the commands in Table 13-62 to the relay or, if the optional HMI is supplied, navigate to screen \CTRL\43\143 to set the mode of the 143 switch to the TRUE state (logic 1). Result: OUT1 contact closes and remains closed. 13-60 Testing And Maintenance BE1-CDS220...
  • Page 375 Table 13-65. Mode 3 Test Commands Command Purpose CS-243=P Selects virtual switch 243 for change to closed (true) state and return open CO-243=P Executes virtual switch 243 for change to closed (true) state and return open BE1-CDS220 Testing And Maintenance 13-61...
  • Page 376 OUT2 contact closes for 200 milliseconds and returns to the open state, and OUT3 contact closes (close state) and remains closed. Table 13-68. 101 Virtual Breaker Control Switch Close Test Commands Command Purpose Gain write access CS-101C=C Selects 101C for close operation CO-101C=C Executes 101C for close operation 13-62 Testing And Maintenance BE1-CDS220...
  • Page 377 62 timer dropped out approximately 2,000 milliseconds later. The state of the 43 switches in the SER report use the programmable name parameters applied to the switch. Figure 13-17 illustrates the timing relationship of the 43 switch and 62 timer. BE1-CDS220 Testing And Maintenance 13-63...
  • Page 378 (FALSE-TRUE-FALSE) was logged and that approximately 400 milliseconds after the initial 143 FALSE-TRUE-FALSE initiate signal action, the 162 timer output went TRUE. Then, approximately 20 seconds later, duration timer T2 expired and the timer output went FALSE 13-64 Testing And Maintenance BE1-CDS220...
  • Page 379 15 seconds (the pickup timer setting) have elapsed, but before the 20 second dropout time delay expires. This will illustrate the action of the timer mode. The time delay settings may be increased if difficulty is encountered with repeating the 343 switch actions. BE1-CDS220 Testing And Maintenance 13-65...
  • Page 380 Zero out custom logic settings. Overwrite with logic = none settings. Confirm overwrite SL-N=T62 Sets T62 as custom logic name SL-43=2 Enables 43 switch ON/OFF mode SN-43=62_INI,PU,DO Name switch to make SER easier to read SL-62=5,43,0 Enables 62 integrating mode, 43 initiate, no blocking 13-66 Testing And Maintenance BE1-CDS220...
  • Page 381 Timer T1 timed out and the 62 timer output went TRUE. Timer T2 timed out and the 62 timer output returned to a FALSE state D2595-05.cdr 07-19-00 >5 s 15 s 100% Timer Figure 13-20. x62 Mode 5 (Integrating) Timing Example BE1-CDS220 Testing And Maintenance 13-67...
  • Page 382 Use the RS-LGC command to obtain an SER report and verify that the following actions were logged. These events are illustrated in the timing diagram of Figure 13-21. Timer T1 continued to time out after the first 43 switch action (TRUE). 13-68 Testing And Maintenance BE1-CDS220...
  • Page 383 Enables 43 switch ON /OFF mode SL-143=2 Enables 143 switch ON /OFF mode SL-243=2 Enables 243 switch ON /OFF mode SL-343=2 Enables 343 switch ON /OFF mode SL-443=2 Enables 443 switch ON /OFF mode SN-43=GROUP_MAN_SELECT, Set Switch Names GROUP0,NORMAL BE1-CDS220 Testing And Maintenance 13-69...
  • Page 384 If the active setting group does not change, step the current up to just below the next group switch limit for the duration indicated. The setting group change should occur between the low and high limits. Monitor the output contacts to verify that the change occurred 13-70 Testing And Maintenance BE1-CDS220...
  • Page 385 0.86 A > 1 min Switch to SG2 (100% SG0 51P) 0.83 A 0.71 A > 1 min Switch to SG1 (85% S0 51P pickup) 1.13 > 1 min Switch to SG0 (70% S0 51P pickup) BE1-CDS220 Testing And Maintenance 13-71...
  • Page 386 RG-GRPACTIVE to the relay. It should echo back that the SG3 is the active group. If your relay is supplied with the HMI option, you may also verify the active setting group at the front panel interface screen \STAT\OPER\ACTIVEG, 1.4.4. 13-72 Testing And Maintenance BE1-CDS220...
  • Page 387 It should echo back that the SG0 is the active group. If your relay is supplied with the HMI option, you may also verify the active setting group at the front panel interface screen \STAT\OPER\ACTIVEG, 1.4.4. Step 4. Send to the relay the commands in Table 13-89. BE1-CDS220 Testing And Maintenance 13-73...
  • Page 388 MAINTENANCE BE1-CDS220 Current Differential Systems require no preventive maintenance. The fully numeric design of the BE1-CDS contains no internal jumpers or mechanical settings except for contact sensing ranges. It also requires no calibration. Testing, however, should be performed according to scheduled practices.
  • Page 389 Figure 14-9. General Operation Screen, Global Security Tab..............14-8 Figure 14-10. General Operation Screen, Communication Tab .............. 14-9 Figure 14-11. General Operation Screen, HMI Display Tab..............14-9 Figure 14-12. General Operation Screen, Conversions Tab ..............14-10 Figure 14-13. Setting Group Selection Screen ..................14-11 BE1-CDS220 BESTCOMS Software...
  • Page 390 Figure 14-38. Metering from Reports Pull-Down Menu ................. 14-28 Figure 14-39. Settings Have Changed Dialog Box ................14-29 Figure 14-40. BESTCOMS Settings Compare Setup Dialog Box ............14-30 Figure 14-41. BESTCOMS Settings Compare Dialog Box ..............14-30 BESTCOMS Software BE1-CDS220...

  • Page 391: Section 14 • Bestcoms Software

    Nor is it needed to create a custom scheme complete with settings and adjustments. Also, BESTCOMS is identical within all of the Basler Electric Numerical Systems except for differences inherit in the individual systems. This means that once you become familiar with a BESTCOMS for one system, you are also familiar with BESTCOMS for all of the systems.

  • Page 392: Installation

    Figure 14-1. Typical User Interface Components INSTALLATION BESTCOMS for BE1-CDS220 software contains a setup utility that installs the program on your PC. (This is typical for all of the BE1 numerical systems.) When it installs the program, an uninstall icon (in the Control Panel, Add/Remove Programs feature) is created that you may use to uninstall (remove) the program from your PC.

  • Page 393: Updating Bestcoms Software

    Start BESTCOMS by clicking the Start button, Programs, Basler Electric, and then the BESTCOMS for BE1-CDS220 icon. At startup, a splash screen with the program title and version number is displayed for a brief time (Figure 14-2). After the splash screen clears, you can see the initial screen - the System Setup Summary screen.
  • Page 394 Again, a legend for the color- coding of relay status is provided in the lower right side of the screen. Figure 14-4. System Setup Summary Screen, Reporting and Alarms Tab 14-4 BESTCOMS Software BE1-CDS220...

  • Page 395: Configuring The Pc

    CONFIGURING THE PC If you have an actual BE1-CDS220 relay, configure your PC to match the BE1-CDS220 configuration. To do this, pull down the Communication menu in the pull-down menu and select Configure. Now, match the communication configuration in the BE1-CDS220 relay. You may select Terminal (VT100 Emulation) and go directly to that communication protocol.
  • Page 396 This screen (Figure 14-6) allows you to fill in the serial number of the relay and the various software and firmware application version information. Additionally, you may enter the name of the relay, substation identification, and other installation-specific identification. This information will become useful when reports are generated. Figure 14-6. General Operation Screen, Identification Tab 14-6 BESTCOMS Software BE1-CDS220...
  • Page 397 In other words, you must make entries in these fields in order for the BE1-CDS220 protection elements to function. Enter the CT Ratio Turns value and the primary amperes value is entered for you. For example, if you entered 220 for the Turns value and the secondary nominal current input is 1, the primary amperes value is 220.
  • Page 398 Modbus, the Com Port 2, Modbus Settings panel appears on the General Operation screen, Communication tab. This panel allows the user to select the Precision Format, Parity, Remote Delay Time, Stop Bits, and Password. For more information on these parameters, see the Modbus Instruction Manual (Basler Electric part number 9365200992). 14-8 BESTCOMS Software...
  • Page 399 General Operation screen, you can select a screen scroll item in BESTCOMS that is not available in the relay. If you do, you will get an error code immediately. Figure 14-11. General Operation Screen, HMI Display Tab BE1-CDS220 BESTCOMS Software 14-9...

  • Page 400: Bestcoms Software

    Protection and Control, for more information on Setting Groups.) The setting group control also has an alarm output variable SGC (Setting Group Changed). This output is asserted whenever the BE1-CDS220 switches from one setting group to another. The alarm bit is asserted for the SGCON time setting. You can click in the Setting Group Change (SGC) Alarm Timer (Sec) field and set the SGCON time setting.

  • Page 401: Percentage Differential

    Unrestrained Pickup is set using the drop down menu arrow next to the selection box. To the right, Up/Down arrows are used to select any value between 1 times tap to 21 times tap with zero as the default. BE1-CDS220 BESTCOMS Software 14-11...
  • Page 402 Up/Down arrows. Restraint Slope % can be set for 15 to 60 degrees. Time can be set for milliseconds, minutes, or cycles using the drop down menu. Figure 14-15. Percentage Differential Screen, 87ND Tab 14-12 BESTCOMS Software BE1-CDS220...

  • Page 403: Overcurrent Protection

    They are divided up into three tabs, (51, 151, and 251). The pull down Pickup menu allows you to select the relative pickup quantity. BE1-CDS220 relays measure the current input in secondary amperes. If you want to use per unit, percent amperes, or primary current, you must coordinate the settings in Power Systems &...
  • Page 404 These two screen tabs allow you to enter the settings for the 151 and 251 time overcurrent elements. They are configured the same as on the 51 tab. BE1-CDS220 relays have three of each phase, neutral, and negative-sequence instantaneous overcurrent elements with settable time delay. The screens for the instantaneous elements are almost identical to the 51 screen.

  • Page 405: Breaker Failure

    Logic settings for the breaker failure function can be made by clicking on the BESTlogic button and with your custom logic selected. Select the mode and other input logic by using the Mode pull-down menu and clicking on the logic inputs to set the logic. Figure 14-19. Breaker Failure Screen BE1-CDS220 BESTCOMS Software 14-15...

  • Page 406: Logic Timers

    Alarms icon that is shown at the right margin of this paragraph. This screen has six folder tabs and the first tab is Clock Display Mode. Clock Display Mode Use the Time Format and Date Format pull-down menus to set the current time and date in the preferred format. See Figure 14-21. 14-16 BESTCOMS Software BE1-CDS220...
  • Page 407 Logging Period (Days) field. To set the Logging Interval (Minutes), click in the field and enter the time or adjust the time by using the appropriate (Up or Down) arrow buttons in the range of 1 to 60 minutes. BE1-CDS220 BESTCOMS Software...
  • Page 408 Threshold field is viable and has a zero threshold. Use the keyboard to enter the threshold value or the appropriate (Up or Down) arrow buttons. Repeat the procedure for Breaker Alarm Points 2 and 3. 14-18 BESTCOMS Software BE1-CDS220...
  • Page 409 Disabled (default), Duty, or Thru Faults. The Threshold (range) is set using Up/Down arrows and is dependent on the mode setting: Duty: 0-100 and Thru Faults: 0 - 99,999. Figure 14-24. Reporting and Alarms Screen, Transformer Monitoring Tab BE1-CDS220 BESTCOMS Software 14-19...
  • Page 410 Alarms BE1-CDS220 relays have 28 programmable alarm points (Figure 14-25). These points are for the monitored power system, associated equipment, and non-core circuits and functions in the relay. Each of these alarm points can be programmed to assert the Major, Minor, or Logic Alarm when an alarm point is activated.

  • Page 411: Inputs And Outputs

    This screen has three folder tabs and the first tab is Inputs 1 - 4. Inputs 1 - 4 Four programmable inputs in the BE1-CDS220 relay are set by this tab. See Figure 14-27. Figure 14-27. Inputs and Outputs Screen, Inputs 1 - 4 Tab BE1-CDS220...

  • Page 412: Virtual Switches

    Inputs 5 - 8 There are four programmable inputs in the BE1-CDS220 relay that are set by this tab. Functionality is the same as described for Inputs 1 - 4. Outputs 1 – 6, A On this tab (Figure 14-28), the only feature that you may change is to select the programmable hold attribute.

  • Page 413: Bestlogic

    Mode pull-down menu. The 143, 243, and 343 switches can be changed in the same manner. One virtual breaker control switch is available with the BE1-CDS220 (Figure 14-29). The mode logic setting for Virtual Breaker Control Switch 101 can be made by clicking on the BESTlogic button. With your custom logic selected, select the mode logic by using the Mode pull-down menu.
  • Page 414 VO6. Click on the logic input and program the logic variables that define VO6. You may clear the existing programming by clicking on the Clear button or clicking on each individual variable. All 16 virtual outputs have the same function. Figure 14-31. BESTlogic Screen, Virtual Outputs Tab 14-24 BESTCOMS Software BE1-CDS220...
  • Page 415 34) with the available programming. If the Mode pull-down menu is available, select the appropriate mode. Click on the logic inputs and program the appropriate logic. Figure 14-32. BESTlogic Screen, Function Blocks Tab Figure 14-33. BESTlogic Function Element Screen, Breaker Status BE1-CDS220 BESTCOMS Software 14-25...

  • Page 416: Copying Settings From Group To Group

    (Figure 14-36) allowing you to select the Copy to Group. After you OK the copy routine, another dialog box opens to inform you that the copy routine is complete. Figure 14-34. From Group to Group from Copy Pull-down Menu Figure 14-35. Copy Group To Dialog Box 14-26 BESTCOMS Software BE1-CDS220...

  • Page 417: Downloading Oscillography Files

    Trigger button in the View/Download Relay Fault Files dialog box. Figure 14-36. Oscillography Download from Reports Pull-down Menu Figure 14-37. View/Download Relay Fault Files Screen BE1-CDS220 BESTCOMS Software 14-27...

  • Page 418: View Fault Details

    Header File, Fault Sequence, and Fault Summary also change automatically. OK the file names and then exit the dialog box. You have now downloaded the oscillography file. You may view this oscillography file using Basler Electric's BESTwave software. METERING To observe the system metering, pull down the Reports menu from the pull-down menu and select Metering.

  • Page 419: File Management

    Printing a Settings File To print a settings file, pull down the File menu and select Print. A dialog box, Print BE1-CDS220 Settings ...

  • Page 420: Comparing Settings Files

    If there are any differences in the two files, a dialog box will pop up notifying you that Differences Are Found. The BESTCOMS Settings Compare dialog box pops up (Figure 14-42) where you can select to Show All or Show Diffs. Figure 14-41. BESTCOMS Settings Compare Dialog Box 14-30 BESTCOMS Software BE1-CDS220...

  • Page 421: Bestprint

    Profile files for each device are needed to print documentation for that particular device. New and updated profiles will be available from Basler Electric. One new set of profiles and their support files will be the optimum way to acquire additional printing of more devices or updated settings files.
  • Page 422 This page intentionally left blank. 14-32 BESTCOMS Software BE1-CDS220...
  • Page 423 Figure A-15. Time Characteristic Curve C, Extremely Inverse, 99-1377 ..........A-19 Figure A-16. Time Characteristic Curve G, Long Time Inverse, 99-1622..........A-20 Tables Table A-1. 51P, 51N, and 51Q Time Characteristic Curve Constants............A-2 Table A-2. Characteristic Curve Cross-Reference..................A-3 Table A-3. Time Dial Setting Cross-Reference ..................A-4 BE1-CDS220 Time Overcurrent Characteristic Curves...
  • Page 424 This page intentionally left blank. Time Current Characteristics BE1-CDS220...

  • Page 425: Appendix A Time Overcurrent Characteristic Curves

    CHARACTERISTIC CURVES GENERAL Basler Electric inverse time overcurrent systems (ANSI Device 51) provide time/current characteristic curves that very closely emulate most of the common electro-mechanical, induction disk relays that were manufactured in North America. To further improve proper relay coordination, selection of integrated reset or instantaneous reset characteristics is also provided.
  • Page 426 ‡ The programmable curve allows for four significant digits after the decimal place for every variable. TIME OVERCURRENT CHARACTERISTIC CURVE GRAPHS Figures A-1 through A-16 illustrate the characteristic curves of the BE1-CDS220 relay. Table A-2 cross- references each curve to existing electromechanical relay characteristics. Equivalent time dial settings were calculated at a value of five times pickup.
  • Page 427 Cross-reference table values were obtained by inspection of published electromechanical time current characteristic curves. The time delay for a current of five times tap was entered into the time dial calculator function for each time dial setting. The equivalent Basler Electric time dial setting was then entered into the cross-reference table.
  • Page 428 In applications where the time coordination between curves is extremely close, we recommend that you choose the optimal time dial setting by inspection of the coordination study. In applications where coordination is tight, it is recommended that you retrofit your circuits with Basler Electric electronic relays to ensure high timing accuracy.
  • Page 429 Figure A-1. Time Characteristic Curve S, S1, Short Inverse, 99-1369 (Similar to ABB CO-2) BE1-CDS220 Time Overcurrent Characteristic Curves...
  • Page 430 Figure A-2. Time Characteristic Curve S2, Short Inverse, 99-1595 (Similar To GE IAC-55) Time Overcurrent Characteristic Curves BE1-CDS220...
  • Page 431 Figure A-3. Time Characteristic Curve L, L1, Long Inverse, 99-1370 (Similar to ABB CO-5) BE1-CDS220 Time Overcurrent Characteristic Curves...
  • Page 432 Figure A-4. Time Characteristic Curve L2, Long Inverse, 99-1594 (Similar To GE IAC-66) Time Overcurrent Characteristic Curves BE1-CDS220...
  • Page 433 Figure A-5. Time Characteristic Curve D, Definite Time, 99-1371 (Similar To ABB CO-6) BE1-CDS220 Time Overcurrent Characteristic Curves...
  • Page 434 Figure A-6. Time Characteristic Curve M, Moderately Inverse, 99-1372 (Similar to ABB CO-7) A-10 Time Overcurrent Characteristic Curves BE1-CDS220...
  • Page 435 Figure A-7. Time Characteristic Curve I, I1, Inverse Time, 99-1373 (Similar to ABB CO-8) BE1-CDS220 Time Overcurrent Characteristic Curves A-11...
  • Page 436 Figure A-8. Time Characteristic Curve I2, Inverse Time, 99-1597 (Similar to GE IAC-51) A-12 Time Overcurrent Characteristic Curves BE1-CDS220...
  • Page 437 Figure A-9. Time Characteristic Curve V, V1, Very Inverse, 99-1374 (Similar to ABB CO-9) BE1-CDS220 Time Overcurrent Characteristic Curves A-13...
  • Page 438 Figure A-10. Time Characteristic Curve V2, Very Inverse, 99-1596 (Similar to GE IAC-53) A-14 Time Overcurrent Characteristic Curves BE1-CDS220...
  • Page 439 Figure A-11. Time Characteristic Curve E, E1, Extremely Inverse, 99-1375 (Similar to ABB CO-11) BE1-CDS220 Time Overcurrent Characteristic Curves A-15...
  • Page 440 Figure A-12. Time Characteristic Curve E2, Extremely Inverse, 99-1598 (Similar to GE IAC-77) A-16 Time Overcurrent Characteristic Curves BE1-CDS220...
  • Page 441 Figure A-13. Time Characteristic Curve A, Standard Inverse, 99-1621 BE1-CDS220 Time Overcurrent Characteristic Curves A-17...
  • Page 442 Figure A-14. Time Characteristic Curve B, Very Inverse, 99-1376 A-18 Time Overcurrent Characteristic Curves BE1-CDS220...
  • Page 443 Figure A-15. Time Characteristic Curve C, Extremely Inverse, 99-1377 BE1-CDS220 Time Overcurrent Characteristic Curves A-19...
  • Page 444 Figure A-16. Time Characteristic Curve G, Long Time Inverse, 99-1622 A-20 Time Overcurrent Characteristic Curves BE1-CDS220...

  • Page 445: Appendix B Command Cross-Reference

    Alarm Setting (Table B-6) • General Setting (Table B-7) • Breaker Monitoring and Setting (Table B-8) • Programmable Logic Setting (Table B-9) • User Programmable Name Setting (Table B-10) • Protection Setting (Table B-11) • Global (Table B-12) BE1-CDS220 Command Cross-Reference...
  • Page 446 Control Group 2.3.1 CS/CO-OUTn Control Output n 2.4.1 Table B-4. Report Commands ASCII Command Function HMI Screen Report/Reset alarm information (logic, major, minor, relay). RA[<x>] Report/Reset alarm information. RA-DIFF[=TRIG] Read/Trigger Differential Report Data. RA-LGC[=0] Report/Reset logic alarm information. Command Cross-Reference BE1-CDS220...
  • Page 447 Read Transformer Duty Status 4.5.1 RT-DUTY Read/Set transformer through-fault duty log 4.5.1 RT-TFCNTR[=0] Read/Set transformer through fault counter 4.5.1 ∗ Multiple screens required. Table B-5. Setting Command ASCII Command Function HMI Screen Read all relay setting parameters. BE1-CDS220 Command Cross-Reference...
  • Page 448 Report/Enable Target List and Reset Target Logic. SG-TRIGGER[n][=<TRIPtrigger>, Read/Set trigger logic. <PUtrigger>, <LOGIC trigger>] Table B-8. Breaker Monitoring and Setting Commands ASCII Command Function HMI Screen Read all breaker settings. SB-DUTY[=<mode>,<DMAX>] Read/Set breaker contact duty. 6.5.1 SB-LOGIC[=<breaker close logic>] Read/Set breaker contact logic. Command Cross-Reference BE1-CDS220...
  • Page 449 Read/Set the 87 tap parameters 5.#.1.2 >] SP-BF[=<time>[m/s/c]] Read/Set the breaker failure timer setting 5.5.1 SP-CURVE[=<A>,<B>,<C>,<N>,<R>] Read/Set user programmable curve parameters. SP-GROUP<g>=[<sw_time>,<sw_level%>,< Read/Program auxiliary setting group auto 6.7x ret_time>,<ret_level%>,<prot_ele>] operation. ST[=<mode>,<dmax>,<ct Read/Set transformer duty. 6.6.1 ckt#>,<BLKTXFMR logic> BE1-CDS220 Command Cross-Reference...
  • Page 450 Table B-12. Global Command ASCII Command Function HMI Screen GS-PW<t>[=<password>,<com Read or change a password. ports(0/1/2)>]] Command Cross-Reference BE1-CDS220...
  • Page 451 Figure C-3. ASCII Setup Dialog Box......................C-2 Figure C-4. Terminal Preferences Dialog Box ..................C-3 Figure C-5. Text Transfers Dialog Box ..................... C-3 Figure C-6. Communications Dialog Box....................C-3 Tables Table C-1. RS-232 Communication Ports ....................C-2 BE1-CDS220 Terminal Communication...
  • Page 452 This page intentionally left blank. Terminal Communication BE1-CDS220...

  • Page 453: Appendix C Terminal Communications

    Step 4: Dialog Box: CONNECTION DESCRIPTION See Figure C-1. a. Type the desired file name, for example, BE1-CDS220. b. Click “OK”. Step 5: Dialog Box: PHONE NUMBER a. Click drop-down...
  • Page 454 Step 1: In Program Manager, open the Accessories program group and double click the Terminal icon to start the program. Step 2: On the menu bar, select Settings/Terminal Emulation. a. In the dialog box, click DEC VT-100 (ANSI). b. Click “OK”. Step 3: Select Settings/Terminal Preferences. Terminal Communication BE1-CDS220...
  • Page 455 File and open this file. Terminal will automatically be setup properly to communicate with the BE1- CDS220. Step 7: Terminal is now ready to communicate with the relay. Figure C-6. Communications Dialog Box BE1-CDS220 Terminal Communication...
  • Page 456 This page intentionally left blank. Terminal Communication BE1-CDS220...
  • Page 457 SETTING NOTE 2 - CT BURDEN, DELTA CONNECTED CT’S, 3-PHASE FAULT ......D-14 SETTING NOTE 3 - PHASE-TO-PHASE FAULT, DELTA CONNECTED CTS ......... D-15 SETTING NOTE 4 - SLOPE SETTING WHEN CT SATURATION FACTOR (SF) > 0.5 ....D-16 BE1-CDS220 Settings Calculations...

  • Page 458: Appendix D Settings Calculations

    This page intentionally left blank. Settings Calculations BE1-CDS220...

  • Page 459: Appendix D • Settings Calculations

    APPENDIX D • SETTINGS CALCULATIONS GENERAL These settings calculations are provided to assist in developing the required settings for the BE1-CDS220 Current Differential System. To develop these settings, the paragraphs in this section discuss each task. • Verify CT Performance •...
  • Page 460 Table D-1. HIGH Step 3. Determine the worst case burden voltage for a line-to-ground fault (V For wye-connected CTs: Where: = determined in Step 1 = one-way lead resistance in ohms = relay resistance in ohms Settings Calculations BE1-CDS220...
  • Page 461 = 0.5. Larger saturation factors will make the relay insecure for external faults. Possible solutions are to increase the CT quality, adjust the CT tap connections to increase effective accuracy class, or to use internal phase compensation instead of delta connecting CTs. BE1-CDS220 Settings Calculations...

  • Page 462: Calculate Ideal Taps

    CDS220 relay does not magnify the secondary current when performing the phase compensation internally. The COMP factor is 1 unless the CTs are connected in Delta. The BE1-CDS220 automatically takes the √3 factor into account prior to the tap adjustment when internal phase compensation is applied to a set of CT input currents.

  • Page 463: Calculate Minpu

    The minimum pickup restraint setting (Minpu) adjusts the sensitivity of the relay. In non-numerical relays, the Minpu was fixed at a typical value of 0.35 of the relay tap. In the BE1-CDS220 relay, the user can choose lower or higher values to optimize the protection in each particular application. Selecting a lower...

  • Page 464: Choose Unrestrained Pickup Setting

    Typical numbers used in the industry for inrush have been eight to twelve times the rating of the transformer. Due to the operating characteristics of the BE1-CDS220 unrestrained differential element, a setting of six times the self cooled rating provides security for inrush. We can use a lower URO pickup setting and maintain security for unrestrained tripping because inrush current typically has a high peak that is non-sinusoidal.
  • Page 465 • Load tap changer. • Tap mismatch (assumed to negligible due to the fine tap adjustment available in the relay). BE1-CDS220 Settings Calculations...
  • Page 466 (2 for two restraint relay, 3 for three restraint relay). If more than one CT is nearing the performance limit, the errors tend to cancel. • Relay measuring errors. A total of 4% applies to the BE1-CDS220 (2% per input circuit). The following errors are not included in the S operating slope value (these sources of mismatch do not vary with through current so they affect the minpu setting only).
  • Page 467 CT error will typically be less than 1%. Thus, calculating the margin using S = 20 (replace 10% CT error with 1% CT error) yields the following result in Equation D-22. BE1-CDS220 Settings Calculations...

  • Page 468: Harmonic Restraint Settings

    This unique method of second harmonic sharing is recommended to ensure proper restraint on all phases without blocking tripping on faulted phases. For special transformers cases, contact the transformer manufacturer or the Basler Electric Technical Services Department. Step 1: If second harmonic sharing is enabled, set the second harmonic restraint unit setting at 18%.

  • Page 469: Setting Note 1 - Ct Performance Evaluation: Saturation Factor

    (point C in Figure D-4). We can define a measure of the degree of saturation with the Saturation Factor: SF = By examination of triangles OAB and OCD, the same saturation factor can be expressed as SF = BE1-CDS220 Settings Calculations D-11...

  • Page 470: Saturation Factor Defined From The Ct Excitation Curve

    Using the equivalent circuit in Figure D-3 and the ANSI Accuracy Class definition that the CT must be able to source 20 times nominal current into a standard burden Zc, we now develop a comparative analysis between the two definitions: SF = SF = D-12 Settings Calculations BE1-CDS220...
  • Page 471 The absolute values of SF and SF’ are compared in Figure D-6 for the particular case where Zc=2, ZB=0.5, and Rs=0.8 when IF varies from 0 to 100A. SF and SF` for Zc=2, ZB=0.5, Rs=0.2 Figure D-6. Comparing SF and SF’ BE1-CDS220 Settings Calculations D-13...

  • Page 472: Conclusion

    SF is marginal. SETTING NOTE 2 - CT BURDEN, DELTA CONNECTED CT’S, 3-PHASE FAULT RELAY D2857-22.vsd 11-09-99 Figure D-8. CT Burden, Delta Connected CTs, 3-Phase Fault D-14 Settings Calculations BE1-CDS220...

  • Page 473: Setting Note 3 - Phase-To-Phase Fault, Delta Connected Cts

    Since I =-(I Where: = 3-Phase fault current = Relay burden = Lead burden = Winding burden SETTING NOTE 3 - PHASE-TO-PHASE FAULT, DELTA CONNECTED CTS RELAY D2779-01 11-09-99 Figure D-9. Phase-To-Phase Fault, Delta Connected CTs BE1-CDS220 Settings Calculations D-15...

  • Page 474: Setting Note 4 - Slope Setting When Ct Saturation Factor

    The effect of this setting is illustrated in the following hypothetical, where it can be seen that the slope based on the linear operation may be too low when severe saturation occurs. Figure D-10. Slope Setting D-16 Settings Calculations BE1-CDS220...
  • Page 476 ROUTE 143, BOX 269 HIGHLAND, IL 62249 USA http://www.basler.com, info@basler.com PHONE +1 618-654-2341 FAX +1 618-654-2351...

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