Basler BE1-51C Instruction Manual
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Basler BE1-51C Instruction Manual

Communications overcurrent relay
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  • Page 1 +05647%6+10/#07#. %1//70+%#6+10518'4%744'06 4'.#; /1&'.$'% Basler Electric Highland, Illinois S O L I D - S T A T E P R O T E C T I V E R E L A Y S T A T U S...
  • Page 2 INTRODUCTION This manual provides information concerning the operation and installation of: BE1-51C Communications Overcurrent Relay Version 1.6 Software Revision 3.46 To accomplish this, the following is provided. Specifications Functional description Mounting information Operational Test Procedure A Service Manual, publication 9 2330 00 620, is available on special order as an aid in troubleshooting and repair.
  • Page 3 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. It is not the intention of this manual to cover all details and variations in equipment, nor does this manual provide data for every possible contingency regarding installation or operation.

  • Page 4: Table Of Contents

    contents Section 1 GENERAL INFORMATION Description ........1-1 Application .
  • Page 5 CONTENTS - Continued Section 4 OPERATION BY FRONT PANEL (continued) Setting the Time Dial ......4-3 Setting Tap Calibration .
  • Page 6 CONTENTS - Continued Section 7 MAINTENANCE General ......... . . 7-1 In-House Repair .

  • Page 7: Description

    APPLICATION The BE1-51C relay is utility grade, and may be used for the protection of medium voltage electrical power systems. It is designed to monitor the outputs of standard (5 A secondary) current transformers and, when tripped, to close an output contact that may be used to trip a breaker.

  • Page 8: Trip And Reset

    INST2 trip output. NEUTRAL TRIP SELECTIVITY This standard feature of the BE1-51C allows the neutral element to be enabled or disabled on the timed and INST1 output. Alternatively, their functions can be shifted to the INST 2 output relay (functions are shifted...

  • Page 9: Breaker Failure

    Functions incorporated into existing output relays (51, INST1) 0000 0111=07h 50g and 51g both enabled Neutral functions incorporated with phase functions (51, INST1) This is how BE1-51C/SCOR version 1.5 and previous functioned. 0000 1011=0bh Neutral function disabled for 51 element Neutral function enabled for 50 element...

  • Page 10: Communications Option

    BE1-51C General Information The result of a breaker failure is an event in the event log. The event contains the timestamp and the breaker status (register 68). A sample of the breaker status in register 68 follows. Reg 68 Breaker Status (This is a read/write register.)

  • Page 11: Style Number

    Normally open (NO) output contacts for tripping the breaker are standard, so output Option E is the third character. The fourth and fifth characters are Z5, representing switch selectable timing standard on the BE1-51C relay. This feature allows the timing to be selected from any of the eight overcurrent timing functions illustrated in Figures 1-2 through 1-9.

  • Page 12: Style Number Identification Chart

    BE1-51C General Information Figure 1-1. Style Number Identification Chart...
  • Page 13 BE1-51C General Information BE1-51C SPECIFICATIONS The BE1-51C relay is available in single-phase, three-phase, two-phase-with-neutral, and three-phase-with- neutral configurations, and with the following features and capabilities. Current Sensing Inputs The unit is designed to operate from the secondary of a standard current transformer rated at 5 A.
  • Page 14 BE1-51C General Information Overcurrent Timing The relay incorporates all of the time overcurrent characteristics shown in Characteristics Figures 1-2 through 1-9. Selection of a specific timing characteristic is accomplished by programmed INSTructions. Separate selections can be made for phase current and for neutral current.

  • Page 15: Time Overcurrent Curves

    BE1-51C General Information inductive 120/240 Vac, Make and break 0.3 A (L/R=0.04). 125/250 Vdc Shock In standard tests the relay has withstood 15 g in each of three mutually perpendicular axes without structural damage or degradation of performance. Vibration In standard tests the relay has withstood 2 g in each of three mutually...
  • Page 16 BE1-51C General Information Figure 1-2. Timing Option B1, Figure 1-3. Timing Option B2, Short Inverse (99-1250) Long Inverse (99-1251) 1-10...
  • Page 17 BE1-51C General Information Figure 1-4. Timing Option B3, Figure 1-5. Timing Option B4, Definite Time (99-1252) Moderate Inverse (99-1253) 1-11...
  • Page 18 BE1-51C General Information Figure 1-6. Timing Option B5, Figure 1-7. Timing Option B6, Inverse (99-1254) Very Inverse (99-1255) 1-12...
  • Page 19 BE1-51C General Information Figure 1-8. Timing Option B7, Figure 1-9. Timing Option B8, Extremely Inverse (99-1256) T (99-1257) 1-13...
  • Page 20 SECTION 2 %10641.5#0&+0&+%#6145 Figure 2-1 shows the front panel of the BE1-51C relay with all the options installed. Each control and indicator is assigned a locator letter which is described in Table 2-1. Table 2-1. BE1-51C Controls and Indicators Locator...
  • Page 21 BE1-51C Controls and Indicators Figure 2-1. Location of Controls and Indicators...
  • Page 22 BE1-51C Controls and Indicators 6CDNG$'%%QPVTQNUCPF+PFKECVQTU%QPVKPWGF Locator Control or Indicator Function FUNC/DATA - Continued When the relay is powered up, the display will default to the DATA mode. Crossing from one mode to the other, and entering/modifying the data is described briefly below (locators I, J), and in detail in Section 4.
  • Page 23 BE1-51C Controls and Indicators 6CDNG$'%%QPVTQNUCPF+PFKECVQTU%QPVKPWGF Locator Control or Indicator Function GROUND Range Plate Indicates the range (HIGH or LOW) of the relay ground current input. (Reference the front-panel TAP value table, locator O.) Note that the range is determined (during manufacture) by the style number of the relay.

  • Page 24: Functional Description

    FUNCTIONAL DESCRIPTION GENERAL The BE1-51C relay is a microprocessor based overcurrent relay that can communicate with a remote computer. The following text is referenced to Figure 3-1, which is a functional block diagram that illustrates the overall operation of a fully implemented version of the relay.
  • Page 25 BE1-51C Functional Description Figure 3-1. Functional Block Diagram...

  • Page 26: Loss-Of-Power Sensing

    BE1-51C Functional Description Loss-of-Power Sensing A loss-of-power circuit monitors the power supply. If power is interrupted, the Relay Disabled output contact closes as explained later in this section (under Outputs). ANALOG-TO-DIGITAL (A/D) CONVERTER The voltage representing the sensed current is applied to the A/D converter. The A/D converter supplies the equivalent binary value of the sensed current to the trip comparator.

  • Page 27: Instantaneous And Command Close Options

    BE1-51C Functional Description The Relay Disabled output contact is of the normally closed (NC) type. It is held open (by the output relay energized coil) at all times after power-up unless a malfunction is detected. (This arrangement provides for a fail-safe output signal, since the contact is able to close an external alarm circuit even in the absence of power.)

  • Page 28: Operation By Front Panel

    SECTION 4 OPERATION BY FRONT PANEL GENERAL Once installed, and with its operating parameters established in internal memory, the relay functions automatically to protect the system from overcurrent conditions. Front panel operation of the relay consists of programming the registers that define the relay automatic operation. These parameters are entered into the relay memory by using the controls and indicators that were introduced in Section 2, and are further explained below.
  • Page 29 BE1-51C Operation By Front Panel Table 4-1. Configuration Mode Display Sequence Display Register Register Sequence Abbreviation Register Function Range ConF Mode selection window. Addr Indicates the present address of the relay. 0001 to 0254. bAUd Selected bAUd rate. See text.

  • Page 30: Loading The Read/Write Registers

    BE1-51C Operation By Front Panel again, or returning to the data mode. To effect the latter, raise the MODE switch up and hold it there until the word dAtA appears in the display. (This requires about 5 seconds.) Loading the Read/Write Registers As the MODE switch is held raised (in the procedure just described for returning to the data mode), the display should blank and then after about 5 seconds the message P EE should appear.

  • Page 31: Selecting The Time Overcurrent Characteristic

    BE1-51C Operation By Front Panel Neutral current instantaneous trip values are similarly entered (as multiples of the Neutral TAP setting) into registers nin1 and nin2 for the INST 1 and INST 2 contacts. Selecting the Time Overcurrent Characteristic The timing curve registers (11th and 12th in the sequence of Table 4-1) may contain any of 8 codes, b1 through b8, representing the curve types listed in Table 4-2.

  • Page 32: Entering The Data Mode

    BE1-51C Operation By Front Panel Table 4-3. Data Mode Display Sequence Display Display Display Register Sequence Abbreviation Function Range dAtA Mode selection window. Ph. A Phase A current times 1000. 0-50 kA Ph. b Phase B current times 1000. 0-50 kA Ph.

  • Page 33: Error Code Display

    BE1-51C Operation By Front Panel kiloamperes). The Demand Current registers show the average demand of each monitored phase over a time period that is entered into the Demand Period register (register 19, Table 4-1). The displayed average is recalculated each minute for each phase by adding the Demand Period samplings which have accumulated for a given phase, then dividing this sum by the Demand Period number to obtain the average demand value.

  • Page 34: Entering The Settings

    BE1-51C Operation By Front Panel 2. Note that the phase time overcurrent pickup, 4.7 A, falls between tap C and tap D of the HIGH range (as shown on the front-panel chart illustrated in Figure 2-1). The phase Tap Cal value (which interpolates between TAP switch positions) is then calculated as follows.
  • Page 35 BE1-51C Operation By Front Panel 1. Set PHASE TAP to C, and Neutral TAP to C. 2. Load b6 into the Phase Curve Type register, and b5 into the Neutral Curve Type register. 3. Enter 0070 into the Phase Tap Cal register, and 0020 into the Neutral Tap Cal register.

  • Page 36: Equipment And Procedures

    SECTION 5 12'4#6+10$;%1/276'4 EQUIPMENT AND PROCEDURES General The equipment and procedures for communicating with the BE1-51C relay are defined in the following document. BEBUS User's Manual, Basler Publication 9 2330 00 993. Port Converter When the system's managing computer is not equipped with an RS-485 port, the following device will allow an RS-232 port to provide the electrical signals required by the RS-485 standard.

  • Page 37: Register Overview

    BE1-51C Operation By Computer To enter a secured register: METHOD 1 Enter a number <9000 into the Secured Timer register (register 16) that represents a convenient and appropriate access time in milliseconds. (The relay will immediately begin decrement this counter at a once-per-millisecond rate.) Then write into the secured register.
  • Page 38 BE1-51C Operation By Computer Table 5-1. Registers Accessible Via The RS-232 And RS-435 Ports - Continued Register Register Number Name Description AVAILABLE The 256 bits in this register are a map of the registers which are REGISTER accessible on this relay. A master can read this register and tell LIST which registers are supported by this slave.
  • Page 39 BE1-51C Operation By Computer Table 5-1. Registers Accessible Via The RS-232 And RS-435 Ports - Continued Register Register Number Name Description second/100 0 - 9 BAUD RATE Baud rate times 1000. Rate may be .3 (for 300 baud), [SECURED] .6, 1.2, 2.4, 4.8, 9.6, or 19.2 (19,200 baud).
  • Page 40 BE1-51C Operation By Computer Table 5-1. Registers Accessible Via The RS-232 And RS-435 Ports - Continued Register Register Number Name Description SECURED This register counts down from a user entered value TIMER to 0. The register will accept any number from 0 to 9000, which is the count-down time in milliseconds.
  • Page 41 BE1-51C Operation By Computer Table 5-1. Registers Accessible Via The RS-232 And RS-435 Ports - Continued Register Register Number Name Description DEMAND - Continued CURRENT [READ ONLY] 11-12 #2 Phase A Current 13-14 #2 Phase B Current 15-16 #2 Phase C Current...
  • Page 42 BE1-51C Operation By Computer Table 5-1. Registers Accessible Via The RS-232 And RS-435 Ports - Continued Register Register Number Name Description MAX/MIN - Continued POLYPHASE CURRENT [READ ONLY] 17-20 Time Stamp, Max Ph A Cur* 21-24 Time Stamp, Max Ph B Cur*...
  • Page 43 BE1-51C Operation By Computer Table 5-1. Registers Accessible Via The RS-232 And RS-435 Ports - Continued Register Register Number Name Description [READ ONLY] BREAKER This eight-bit register is used to convey information about the last FAILURE breaker failure event. STATUS The register is bit mapped as follows.
  • Page 44 BE1-51C Operation By Computer Table 5-1. Registers Accessible Via The RS-232 And RS-435 Ports - Continued Register Register Number Name Description bit 2 - phase B timing bit 6 - phase C inhibit bit 3 - phase C timing bit 7 - Ground timing...
  • Page 45 BE1-51C Operation By Computer Table 5-1. Registers Accessible Via The RS-232 And RS-435 Ports - Continued Register Register Number Name Description Bit 1 = Current Bit 5 = Vars Bit 2 = Voltage Bit 6 = Power factor Bit 3 = Demand...
  • Page 46 BE1-51C Operation By Computer Table 5-1. Registers Accessible Via The RS-232 And RS-435 Ports - Continued Register Register Number Name Description with RESET reset the contents. Bit 1 = Phase A Bit 5 = Spare Bit 2 = Phase B...
  • Page 47 BE1-51C Operation By Computer Table 5-1. Registers Accessible Via The RS-232 And RS-435 Ports - Continued Register Register Number Name Description bit 7 - spare CURVE TYPE Holds the two codes that determine the characteristic [SECURED] timing curves being used for the phases and ground.
  • Page 48 BE1-51C Operation By Computer Table 5-1. Registers Accessible Via The RS-232 And RS-435 Ports - Continued Register Register Number Name Description STATUS [READ ONLY] FAULT Provides a cumulative total of the RMS current passing ACCUMULATION through the breaker during the last cycle of every fault.
  • Page 49 BE1-51C Operation By Computer Figure 5-1. RS-232 Port Connector Wiring 5-14...
  • Page 50 BE1-51C Operation By Computer Figure 5-2. RS-485 Port Connector Wiring 5-15...

  • Page 51: Installation And Testing

    C37.90-1989 (Dielectric Test). MOUNTING The BE1-51C relay is supplied in a standard S1 size drawout case. Figure 6-1 provides the outline dimensions for this case. The panel drilling and cutout dimensions for this case are provided in Figure 6-2. The relay does not have to be mounted vertically. Any convenient mounting angle may be chosen.

  • Page 52: Connections

    The tolerances of the test equipment; Cycle-to-cycle phase stability of the test equipment; The tolerances of any external components used in the test setup. Detailed calibration and troubleshooting procedures are in the Service Manual, Basler publication 9 2330 00 620. Scope A complete checkout of the relay (or verification test) confirms that the following are within the published specifications.

  • Page 53: Operational Test

    A timer accurate to within 0.001 seconds. Two test plugs, Basler p/n 10095 or GE p/n XLA12A. (Replaces the paddles when testing an installed relay.) For bench testing: An appropriate AC or DC power source for relay operation.

  • Page 54: Time Overcurrent Pickup Test

    BE1-51C Installation and Testing Load 00 into the Phase Tap Cal register. (The procedure for loading the registers is described in Section 4.) Time Overcurrent Pickup Test The phase current pickup of the relay will be set at the factory to operate on one of the two available ranges: HIGH or LOW.

  • Page 55: Timing Test

    BE1-51C Installation and Testing Timing Test The timing characteristics available by programming the relay are illustrated in Figures 1-1 through 1-7. Output trip should occur at the timing shown on these graphs, for any given TIME DIAL setting, to within 10% or 20 milliseconds (whichever is greater).

  • Page 56: Instantaneous Overcurrent Pickup Test

    BE1-51C Installation and Testing Instantaneous Overcurrent Pickup Test The phase current pickup of the relay is set at the factory to operate on one of the two available ranges: HIGH or LOW. If ground current is monitored, it will also be set for one of the two ranges. Determine which range your relay is set for by the placement of the range plate on the front panel.

  • Page 57: Communications Test

    BE1-51C Installation and Testing 12. Disconnect the input current source from terminals 17 and 18 (Phase C) and connect it to terminals 13 and 16 (Ground). 13. Repeat steps 2 through 7 above for ground current. COMMUNICATIONS TESTS General Verification Perform the Preliminary Steps on page 5-3.
  • Page 58 BE1-51C Installation and Testing Figure 6-1. Outline Dimensions...
  • Page 59 BE1-51C Installation and Testing Figure 6-2. Panel Drilling and Cutout Dimensions (Semi-Flush Mounting) Figure 6-3. Control Circuits...
  • Page 60 BE1-51C Installation and Testing Figure 6-4. Single-Phase Current Sensing Connections Figure 6-5. Three-Phase Current Sensing Connections 6-10...
  • Page 61 BE1-51C Installation and Testing Figure 6-6. Three-Phase-with-Neutral Current Sensing Connections Figure 6-7. Two-Phase-with-Neutral Current Sensing Connections 6-11...
  • Page 62 BE1-51C Installation and Testing Figure 6-8. Relay Connections 6-12...

  • Page 63: Maintenance

    Service Manual (publication number 9 2330 00 620). If factory repair is desired, contact the Customer Service Department of the Power Systems Group, Basler Electric, for a return authorization number prior to shipping.

  • Page 64: Troubleshooting

    BE1-51C Maintenance TROUBLESHOOTING The following resources are available to aid in troubleshooting. Built-In-Test The Built-In-Test feature (BIT) is a quick-test routine that is programmed into the firmware of the relay. When initiated, the relay will automatically perform (at one-second intervals) a series of tests that may be monitored by the outputs and indicator lamps of the relay.

  • Page 65: Manual Change Information

    SECTION 8 MANUAL CHANGE INFORMATION SUMMARY AND CROSS REFERENCE GUIDE This section contains information concerning the previous editions of the manual. The substantive changes to date are summarized in the Table 8-1. Summary of Changes 10/90 Subsection added on page 3-4 entitled Instantaneous and Command Close Op- tions.
  • Page 66 EIA Standard: EIA 485. (Also known as the RS-485 Standard.) Published by Electronic Industries Association (April 1983). Remote Access Protocol for Serial Data Link Networks, Basler Publication 9 2330 00 683. BEBUS User's Manual, Basler Publication 9 2330 00 993.

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