GE C70 Instruction Manual

Capacitor bank protection and control system ur series
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GE
Grid Solutions
GE Grid Solutions
650 Markland Street
Markham, Ontario
Canada L6C 0M1
Tel: +1 905 927 7070 Fax: +1 905 927 5098
Internet:
http://www.GEGridSolutions.com
*1601-9015-AA4*
C70 Capacitor Bank Protection
and Control System
UR Series Instruction Manual
Manual P/N: 1601-9015-AA4 (GEK-119555C)
C70 Revision: 7.2x
E83849
LISTED
IND.CONT. EQ.
52TL
834766A1.CDR
GE Multilin's Quality Management
System is registered to ISO
9001:2008
QMI # 005094
UL # A3775

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  • Page 1 Grid Solutions C70 Capacitor Bank Protection and Control System UR Series Instruction Manual C70 Revision: 7.2x Manual P/N: 1601-9015-AA4 (GEK-119555C) 834766A1.CDR E83849 GE Grid Solutions LISTED 650 Markland Street IND.CONT. EQ. 52TL Markham, Ontario GE Multilin's Quality Management Canada L6C 0M1...
  • Page 2 The contents of this manual are the property of GE Multilin Inc. This documentation is furnished on license and may not be reproduced in whole or in part without the permission of GE Multilin. The content of this manual is for informational use only and is subject to change without notice.
  • Page 3: Table Of Contents

    1.3 ENERVISTA UR SETUP SOFTWARE 1.3.1 SYSTEM REQUIREMENTS ................1-5 1.3.2 INSTALLATION....................1-5 1.3.3 CONFIGURING THE C70 FOR SOFTWARE ACCESS ........1-6 1.3.4 USING THE QUICK CONNECT FEATURE............1-9 1.3.5 CONNECTING TO THE C70 RELAY .............. 1-14 1.3.6 SETTING UP CYBERSENTRY AND CHANGING DEFAULT PASSWORD ... 1-15 1.4 UR HARDWARE...
  • Page 4 USER-PROGRAMMABLE LEDS ..............5-74 5.2.11 USER-PROGRAMMABLE SELF TESTS ............5-77 5.2.12 CONTROL PUSHBUTTONS ................5-78 5.2.13 USER-PROGRAMMABLE PUSHBUTTONS............5-80 5.2.14 FLEX STATE PARAMETERS ................5-86 5.2.15 USER-DEFINABLE DISPLAYS ................5-86 5.2.16 DIRECT INPUTS AND OUTPUTS..............5-89 5.2.17 INSTALLATION ....................5-96 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 5 DCMA INPUTS ....................5-261 5.9.2 RTD INPUTS....................5-262 5.9.3 DCMA OUTPUTS ..................5-264 5.10 TESTING 5.10.1 TEST MODE ....................5-267 5.10.2 FORCE CONTACT INPUTS ................5-268 5.10.3 FORCE CONTACT OUTPUTS ..............5-269 GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 6 BANK PHASE OVERVOLTAGE (ANSI 59B) .............8-1 8.1.3 VOLTAGE DIFFERENTIAL (ANSI 87V) .............8-3 8.1.4 COMPENSATED BANK NEUTRAL VOLTAGE UNBALANCE (ANSI 59NU)..8-6 8.1.5 PHASE CURRENT UNBALANCE (ANSI 60P) ..........8-10 8.1.6 NEUTRAL CURRENT UNBALANCE (ANSI 60N) ..........8-12 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 7 DISPOSAL ..................... 10-11 A. FLEXANALOG AND A.1 PARAMETER LISTS FLEXINTEGER A.1.1 FLEXANALOG ITEMS ..................A-1 A.1.2 FLEXINTEGER ITEMS ..................A-34 PARAMETERS B. MODBUS B.1 MODBUS RTU PROTOCOL COMMUNICATIONS B.1.1 INTRODUCTION....................B-1 B.1.2 PHYSICAL LAYER.....................B-1 GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 8 C.6.1 ACSI BASIC CONFORMANCE STATEMENT ..........C-23 C.6.2 ACSI MODELS CONFORMANCE STATEMENT ..........C-23 C.6.3 ACSI SERVICES CONFORMANCE STATEMENT ......... C-24 C.7 LOGICAL NODES C.7.1 LOGICAL NODES TABLE ................C-27 viii C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 9 RADIUS SERVER CONFIGURATION.............. G-1 H. MISCELLANEOUS H.1 CHANGE NOTES H.1.1 REVISION HISTORY ..................H-1 H.1.2 CHANGES TO THE C70 MANUAL..............H-1 H.2 ABBREVIATIONS H.2.1 STANDARD ABBREVIATIONS .................H-5 H.3 WARRANTY H.3.1 GE MULTILIN WARRANTY ................H-7 GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 10 TABLE OF CONTENTS C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 11: Getting Started

    1.1 IMPORTANT PROCEDURES 1 GETTING STARTED 1.1IMPORTANT PROCEDURES Use this chapter for initial setup of your new C70 Capacitor Bank Protection and Control System. 1.1.1 CAUTIONS AND WARNINGS Before attempting to install or use the device, review all safety indicators in this document to help prevent injury, equipment damage, or downtime.
  • Page 12: Inspection Procedure

    • GE EnerVista™ DVD (includes the EnerVista UR Setup software and manuals in PDF format) • Mounting screws If there is any noticeable physical damage, or any of the contents listed are missing, contact GE Grid Solutions as fol- lows.
  • Page 13: Ur Overview

    1.2UR OVERVIEW 1.2.1 INTRODUCTION TO THE UR The GE Universal Relay (UR) series is a new generation of digital, modular, and multifunction equipment that is easily incorporated into automation systems, at both the station and enterprise levels. 1.2.2 HARDWARE ARCHITECTURE...
  • Page 14: Software Architecture

    Employing OOD/OOP in the software architecture of the C70 achieves the same features as the hardware architecture: modularity, scalability, and flexibility. The application software for any UR-series device (for example, feeder protection, transformer protection, distance protection) is constructed by combining objects from the various functional classes.
  • Page 15: Enervista Ur Setup Software

    Ethernet port of the same type as one of the UR CPU ports or a LAN connection to the UR • Internet access or a DVD drive The following qualified modems have been tested to be compatible with the C70 and the EnerVista UR Setup software: • US Robotics external 56K FaxModem 5686 •...
  • Page 16: Configuring The C70 For Software Access

    To configure the C70 for remote access via the rear Ethernet port, see the Configuring Ethernet Communications sec- tion. • To configure the C70 for local access with a computer through either the front RS232 port or rear Ethernet port, see the Using the Quick Connect Feature section. C70 Capacitor Bank Protection and Control System...
  • Page 17 CONFIGURING SERIAL COMMUNICATIONS A computer with an RS232 port and a serial cable is required. To use the RS485 port at the back of the relay, a GE Multilin F485 converter (or compatible RS232-to-RS485 converter) is required. See the F485 instruction manual for details.
  • Page 18 MODBUS PROTOCOL 21. Click the Read Order Code button to connect to the C70 device and upload the order code. If an communications error occurs, ensure that the three EnerVista UR Setup values entered in the previous steps correspond to the relay setting values.
  • Page 19: Using The Quick Connect Feature

    USING QUICK CONNECT VIA THE REAR ETHERNET PORTS To use the Quick Connect feature to access the C70 from a computer through Ethernet, first assign an IP address to the relay from the front panel keyboard. Press the MENU key until the SETTINGS menu displays.
  • Page 20 Right-click the Local Area Connection icon and select Properties. Select the Internet Protocol (TCP/IP) item from the list, and click the Properties button. Click the “Use the following IP address” box. 1-10 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 21 1 GETTING STARTED 1.3 ENERVISTA UR SETUP SOFTWARE Enter an IP address with the first three numbers the same as the IP address of the C70 relay and the last number dif- ferent (in this example, 1.1.1.2). Enter a subnet mask equal to the one set in the C70 (in this example, 255.0.0.0).
  • Page 22 If this computer is used to connect to the Internet, re-enable any proxy server settings after the computer has been discon- nected from the C70 relay. Start the Internet Explorer software. Select the “UR” device from the EnerVista Launchpad to start EnerVista UR Setup. 1-12 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 23 Click the Quick Connect button to open the Quick Connect dialog box. Select the Ethernet interface and enter the IP address assigned to the C70, then click the Connect button. The EnerVista UR Setup software creates a site named “Quick Connect” with a corresponding device also named “Quick Connect”...
  • Page 24: Connecting To The C70 Relay

    The EnerVista UR Setup software has several quick action buttons to provide instant access to several functions that are often performed when using C70 relays. From the online window, users can select the relay to interrogate from a pull-down window, then click the button for the action they want to perform. The following quick action functions are available: •...
  • Page 25: Setting Up Cybersentry And Changing Default Password

    If using EnerVista, navigate to Settings > Product Setup > Security. Change the Local Administrator Password, for example. It is strongly recommended that the password for the Administrator be changed from the default. Changing the passwords for the other three roles is optional. GE Multilin C70 Capacitor Bank Protection and Control System 1-15...
  • Page 26: Ur Hardware

    This device (catalog number F485) connects to the computer using a straight-through serial cable. A shielded twisted-pair (20, 22, or 24 AWG) connects the F485 converter to the C70 rear communications port. The converter terminals (+, –, GND) are connected to the C70 communication module (+, –, COM) terminals. See the CPU Communica- tion Ports section in chapter 3 for details.
  • Page 27: Using The Relay

    MESSAGE LEFT key from a setting value or actual value display returns to the header display. HIGHEST LEVEL LOWEST LEVEL (SETTING VALUE)  SETTINGS  SECURITY ACCESS LEVEL:  PRODUCT SETUP  Restricted  SETTINGS  SYSTEM SETUP GE Multilin C70 Capacitor Bank Protection and Control System 1-17...
  • Page 28: Relay Activation

    For more information, see the CyberSentry content in the Security section of the next chapter. 1.5.6 FLEXLOGIC CUSTOMIZATION FlexLogic equation editing is required for setting user-defined logic for customizing the relay operations. See the FlexLogic section in Chapter 5. 1-18 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 29: Commissioning

    The C70 performs a number of continual self-tests and takes the necessary action in case of any major errors (see the Relay Self-tests section in chapter 7). However, it is recommended that C70 maintenance be scheduled with other system maintenance.
  • Page 30 1.5 USING THE RELAY 1 GETTING STARTED 1-20 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 31: Product Description

    Ethernet port supports IEC 61850, Modbus/TCP, and TFTP protocols, PTP (according to IEEE Std. 1588-2008 or IEC 61588), and allows access to the relay via any standard web browser (C70 web pages). The IEC 60870-5-104 protocol is supported on the Ethernet port. The Ethernet port also supports the Parallel Redundancy Protocol (PRP) of IEC 62439-3 (clause 4, 2012) when purchased as an option.
  • Page 32 Contact inputs (up to 96) Frequency metering User-definable displays Contact outputs (up to 64) IEC 60870-5-103 communications User-programmable fault reports (optional) Control pushbuttons IEC 61850 communications (optional) User-programmable LEDs CyberSentry™ security Modbus communications User-programmable pushbuttons C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 33: Security

    Test mode operation The C70 supports password entry from a local or remote connection. Local access is defined as any access to settings or commands via the faceplate interface. This includes both keypad entry and the through the faceplate RS232 port. Remote access is defined as any access to settings or commands via any rear communications port.
  • Page 34 When entering a settings or command password via EnerVista or any serial interface, the user must enter the correspond- ing connection password. If the connection is to the back of the C70, the remote password must be used. If the connection is to the RS232 port of the faceplate, the local password applies.
  • Page 35 Remote Output DNA |--------------- Bit Pair Remote Output user |--------------- Bit Pair |--------------- Resetting |--------------- Direct Inputs |--------------- Direct Outputs |--------------- Teleprotection |--------------- Direct Analogs |--------------- Direct Integers IEC61850 GOOSE |--------------- Analogs GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 36 When the "Server" Authentication Type option is selected, the UR uses the RADIUS server and not its local authentication database to authenticate the user. No password or security information are displayed in plain text by the EnerVista software or UR device, nor are they ever transmitted without cryptographic protection. C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 37: Iec 870-5-103 Protocol

    The UR implementation of IEC 60870-5-103 consists of the following functions: • Report binary inputs • Report analog values (measurands) • Commands • Time synchronization The RS485 port supports IEC 60870-5-103. GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 38: Order Codes

    2.2ORDER CODES 2.2.1 OVERVIEW The C70 is available as a 19-inch rack horizontal mount or reduced-size (¾) vertical unit and consists of the following mod- ules: power supply, CPU, CT/VT, digital input and output, transducer input and output, and inter-relay communications.
  • Page 39 G.703, 2 Channels RS422, 2 Channels The order codes for the reduced size vertical mount units are shown below. Table 2–5: C70 ORDER CODES (REDUCED SIZE VERTICAL UNITS) * - F Reduced Size Vertical Mount (see note regarding P/R slot below)
  • Page 40: Order Codes With Process Bus Modules

    RS422, 2 Channels 2.2.3 ORDER CODES WITH PROCESS BUS MODULES The order codes for the horizontal mount units with the process bus module are shown below. Table 2–6: C70 ORDER CODES (HORIZONTAL UNITS WITH PROCESS BUS MODULE) * - F - W/X...
  • Page 41 RS422, 2 Channels The order codes for the reduced size vertical mount units with the process bus module are shown below. Table 2–7: C70 ORDER CODES (REDUCED SIZE VERTICAL UNITS WITH PROCESS BUS MODULE) * - F Reduced Size Vertical Mount (see note regarding P/R slot below)
  • Page 42 2.2 ORDER CODES 2 PRODUCT DESCRIPTION Table 2–7: C70 ORDER CODES (REDUCED SIZE VERTICAL UNITS WITH PROCESS BUS MODULE) * - F Reduced Size Vertical Mount (see note regarding P/R slot below) POWER SUPPLY 125 / 250 V AC/DC power supply...
  • Page 43: Replacement Modules

    Replacement modules can be ordered separately. When ordering a replacement CPU module or faceplate, provide the serial number of your existing unit. Not all replacement modules may be applicable to the C70 relay. Only the modules specified in the order codes are available as replacement modules.
  • Page 44 Channel 1 - RS422; Channel 2 - 1300 nm, single-mode, Laser Channel 1 - G.703; Channel 2 - 1300 nm, single-mode Laser G.703, 1 Channel G.703, 2 Channels RS422, 1 Channel RS422, 2 Channels 2-14 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 45: Signal Processing

    The sampling rate is dynamically adjusted to the actual system frequency by an accurate and fast frequency tracking system. The A/D converter has the following ranges of AC signals: Voltages: ± ⋅ 260 V (EQ 2.1) Currents: GE Multilin C70 Capacitor Bank Protection and Control System 2-15...
  • Page 46 61850 services, ICD/CID/IID files, and so on), IEEE 1588 (IEEE C37.238 power profile) based time synchronization, Cyber- Sentry (advanced cyber security), the Parallel Redundancy Protocol (PRP), IEC 60870-5-103, and so on. 2-16 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 47: Specifications

    Open delay: 0 to 65.353 s in steps of 0.001 Timer accuracy: ±3% of operate time or ±20 ms, which- ever is greater Operate time: <80 ms at 60 Hz GE Multilin C70 Capacitor Bank Protection and Control System 2-17...
  • Page 48 Pickup delay: 0 to 600.00 s in steps of 0.01 Timer accuracy: ±3% of operate time or ±35 ms, which- ever is greater Operate time: <35 ms at 60 Hz 2-18 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 49 0 to 600.00 s in steps of 0.01 Timer accuracy: ±3% of operate time or ±20 ms, which- ever is greater <30 ms at 1.10 × pickup at 60 Hz Operate time: GE Multilin C70 Capacitor Bank Protection and Control System 2-19...
  • Page 50: User-Programmable Elements

    Number: up to 256 logical variables grouped tual input under 16 Modbus addresses Reset mode: self-reset or latched Programmability: any logical variable, contact, or virtual input 2-20 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 51: Monitoring

    ±0.5% of reading from 10 to 208 V 0.1 to 2.0 × CT rating: ±0.25% of reading or ±0.1% of rated (whichever is greater) > 2.0 × CT rating: ±1.0% of reading GE Multilin C70 Capacitor Bank Protection and Control System 2-21...
  • Page 52: Inputs

    Debounce time: 0.0 to 16.0 ms in steps of 0.5 Continuous current draw:4 mA (when energized) Auto-burnish impulse current: 50 to 70 mA Duration of auto-burnish impulse: 25 to 50 ms 2-22 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 53: Power Supply

    0.2 A Operate time: < 4 ms Operate time: < 4 ms Contact material: silver alloy Contact material: silver alloy Control: separate operate and reset inputs Control mode: operate-dominant or reset-dominant GE Multilin C70 Capacitor Bank Protection and Control System 2-23...
  • Page 54 99% Settling time to a step change: 100 ms Isolation: 1.5 kV Driving signal: any FlexAnalog quantity Upper and lower limit for the driving signal: –90 to 90 pu in steps of 0.001 2-24 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 55: Communication Protocols

    29 dB Single mode 1550 nm Laser, +5 dBm –30 dBm 35 dB Single mode These power budgets are calculated from the manu- facturer’s worst-case transmitter power and worst NOTE GE Multilin C70 Capacitor Bank Protection and Control System 2-25...
  • Page 56: Environmental

    – Overvoltage category: 20°C Ingress protection: IP20 front, IP10 back HUMIDITY Noise: 0 dB Humidity: operating up to 95% (non-condensing) at 55°C (as per IEC60068-2-30 variant 1, 6 days). 2-26 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 57: Type Tests

    IEC 60255-27 Insulation: class 1, Pollution degree: 2, Over voltage cat II 2.4.12 PRODUCTION TESTS THERMAL Products go through an environmental test based upon an Accepted Quality Level (AQL) sampling process. GE Multilin C70 Capacitor Bank Protection and Control System 2-27...
  • Page 58: Approvals

    To avoid deterioration of electrolytic capacitors, power up units that are stored in a de-energized state once per year, for one hour continuously. 2-28 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 59: Hardware

    HORIZONTAL UNITS The C70 Capacitor Bank Protection and Control System is available as a 19-inch rack horizontal mount unit with a remov- able faceplate. The faceplate can be specified as either standard or enhanced at the time of ordering. The enhanced face- plate contains additional user-programmable pushbuttons and LED indicators.
  • Page 60 VERTICAL UNITS The C70 Capacitor Bank Protection and Control System is available as a reduced size (¾) vertical mount unit, with a removable faceplate. The faceplate can be specified as either standard or enhanced at the time of ordering. The enhanced faceplate contains additional user-programmable pushbuttons and LED indicators.
  • Page 61 3 HARDWARE 3.1 DESCRIPTION Figure 3–4: C70 VERTICAL DIMENSIONS (ENHANCED PANEL) GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 62 3.1 DESCRIPTION 3 HARDWARE Figure 3–5: C70 VERTICAL MOUNTING AND DIMENSIONS (STANDARD PANEL) For side mounting C70 devices with the enhanced front panel, see the following documents available on the UR DVD and the GE Grid Solutions website: • GEK-113180: UR-Series UR-V Side-Mounting Front Panel Assembly Instructions •...
  • Page 63 3 HARDWARE 3.1 DESCRIPTION Figure 3–6: C70 VERTICAL SIDE MOUNTING INSTALLATION (STANDARD PANEL) GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 64 3.1 DESCRIPTION 3 HARDWARE Figure 3–7: C70 VERTICAL SIDE MOUNTING REAR DIMENSIONS (STANDARD PANEL) C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 65: Rear Terminal Layout

    (nearest to CPU module) which is indicated by an arrow marker on the terminal block. See the following figure for an example of rear terminal assignments. Figure 3–9: EXAMPLE OF MODULES IN F AND H SLOTS GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 66: Wiring

    3.2 WIRING 3 HARDWARE 3.2WIRING 3.2.1 TYPICAL WIRING Figure 3–10: TYPICAL WIRING DIAGRAM (T MODULE SHOWN FOR CPU) C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 67: Dielectric Strength

    (see the Self-test Errors section in chapter 7) or control power is lost, the relay is de-energize. For high reliability systems, the C70 has a redundant option in which two C70 power supplies are placed in parallel on the bus.
  • Page 68: Ct/Vt Modules

    CT connections for both ABC and ACB phase rotations are identical as shown in the Typical wiring diagram. The exact placement of a zero-sequence core balance CT to detect ground fault current is shown as follows. Twisted-pair cabling on the zero-sequence CT is recommended. 3-10 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 69 8F, 8G, 8L, and 8M modules (4 CTs and 4 VTs) Current inputs 8H, 8J, 8N, and 8R modules (8 CTs) Voltage inputs 8V modules (8 VTs) 842809A1.CDR Figure 3–13: CT/VT MODULE WIRING GE Multilin C70 Capacitor Bank Protection and Control System 3-11...
  • Page 70: Process Bus Modules

    3.2.5 PROCESS BUS MODULES The C70 can be ordered with a process bus interface module. This module is designed to interface with the GE Multilin HardFiber system, allowing bidirectional IEC 61850 fiber optic communications with up to eight HardFiber merging units, known as Bricks.
  • Page 71 Logic operand driving the contact output should be given a reset delay of 10 ms to prevent damage of the output contact (in situations when the element initiating the contact output is bouncing, at val- ues in the region of the pickup value). GE Multilin C70 Capacitor Bank Protection and Control System 3-13...
  • Page 72 2 Inputs ~7a, ~7c 2 Inputs ~7a, ~7c 2 Inputs ~7a, ~7c 2 Inputs ~8a, ~8c 2 Inputs ~8a, ~8c 2 Inputs ~8a, ~8c 2 Inputs ~8a, ~8c 2 Inputs 3-14 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 73 2 Inputs 2 Outputs Solid-State Solid-State ~6a, ~6c 2 Inputs 2 Outputs Not Used Not Used ~7a, ~7c 2 Inputs 2 Outputs Solid-State Solid-State ~8a, ~8c 2 Inputs Not Used GE Multilin C70 Capacitor Bank Protection and Control System 3-15...
  • Page 74 3.2 WIRING 3 HARDWARE Figure 3–15: CONTACT INPUT AND OUTPUT MODULE WIRING (1 of 2) 3-16 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 75 3.2 WIRING Figure 3–16: CONTACT INPUT AND OUTPUT MODULE WIRING (2 of 2) For proper functionality, observe the polarity shown in the figures for all contact input and output con- nections. GE Multilin C70 Capacitor Bank Protection and Control System 3-17...
  • Page 76 Wherever a tilde “~” symbol appears, substitute with the slot position of the module. NOTE There is no provision in the relay to detect a DC ground fault on 48 V DC control power external output. We recommend using an external DC supply. 3-18 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 77 CONTACT INPUT 1 AUTO-BURNISH = OFF CONTACT INPUT 2 AUTO-BURNISH = ON CONTACT INPUT 1 AUTO-BURNISH = ON CONTACT INPUT 2 AUTO-BURNISH = ON 842751A1.CDR Figure 3–19: AUTO-BURNISH DIP SWITCHES GE Multilin C70 Capacitor Bank Protection and Control System 3-19...
  • Page 78: Transducer Inputs/Outputs

    (5A, 5C, 5D, 5E, and 5F) and channel arrangements that can be ordered for the relay. Wherever a tilde “~” symbol appears, substitute with the slot position of the module. NOTE Figure 3–20: TRANSDUCER INPUT/OUTPUT MODULE WIRING The following figure show how to connect RTDs. 3-20 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 79 3 HARDWARE 3.2 WIRING Figure 3–21: RTD CONNECTION GE Multilin C70 Capacitor Bank Protection and Control System 3-21...
  • Page 80: Rs232 Faceplate Port

    3.2.8 RS232 FACEPLATE PORT A 9-pin RS232C serial port is located on the C70 faceplate for programming with a computer. All that is required to use this interface is a computer running the EnerVista UR Setup software provided with the relay. Cabling for the RS232 port is shown in the following figure for both 9-pin and 25-pin connectors.
  • Page 81 This common voltage is implied to be a power supply common. Some systems allow the shield (drain wire) to be used as common wire and to connect directly to the C70 COM terminal (#3); others function cor- rectly only if the common wire is connected to the C70 COM terminal, but insulated from the shield.
  • Page 82 The fiber optic communication ports allow for fast and efficient communications between relays at 100 Mbps. Optical fiber can be connected to the relay supporting a wavelength of 1310 nm in multi-mode. 3-24 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 83: Irig-B

    IRIG-B is a standard time code format that allows stamping of events to be synchronized among connected devices. The IRIG-B code allows time accuracies of up to 100 ns. Using the IRIG-B input, the C70 operates an internal oscillator with 1 µs resolution and accuracy.
  • Page 84: Direct Input/Output Communications

    1 to channel 2 on UR2, the setting should be “Enabled” on UR2. This DIRECT I/O CHANNEL CROSSOVER forces UR2 to forward messages received on Rx1 out Tx2, and messages received on Rx2 out Tx1. 3-26 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 85: Fiber: Led And Eled Transmitters

    3.3.2 FIBER: LED AND ELED TRANSMITTERS The following figure shows the configuration for the 7A, 7B, 7C, 7H, 7I, and 7J fiber-only modules. Figure 3–29: LED AND ELED FIBER MODULES GE Multilin C70 Capacitor Bank Protection and Control System 3-27...
  • Page 86: Interface

    Remove the module cover screw. Remove the top cover by sliding it towards the rear and then lift it upwards. Set the timing selection switches (channel 1, channel 2) to the desired timing modes. 3-28 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 87 Loop Timing Mode: The system clock is derived from the received line signal. Therefore, the G.703 timing selection should be in loop timing mode for connections to higher order systems. For connection to a higher order system (UR- GE Multilin C70 Capacitor Bank Protection and Control System 3-29...
  • Page 88 G.703 line side of the interface while the other lies on the differential Manchester side of the interface. DMR = Differential Manchester Receiver DMX = Differential Manchester Transmitter G7X = G.703 Transmitter G7R = G.703 Receiver 842775A1.CDR Figure 3–34: G.703 DUAL LOOPBACK MODE 3-30 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 89: Rs422 Interface

    If the terminal timing feature is not available or this type of connection is not desired, the G.703 interface is a viable option that does not impose timing restrictions. GE Multilin C70 Capacitor Bank Protection and Control System 3-31...
  • Page 90 Figure 3–37: TIMING CONFIGURATION FOR RS422 TWO-CHANNEL, THREE-TERMINAL APPLICATION Data module 1 provides timing to the C70 RS422 interface via the ST(A) and ST(B) outputs. Data module 1 also provides timing to data module 2 TT(A) and TT(B) inputs via the ST(A) and AT(B) outputs. The data module pin numbers have been omitted in the figure above since they vary by manufacturer.
  • Page 91: Ieee C37.94 Interface

    5.60. For customers using firmware release 5.60 and higher, the module can be identified with "Rev D" printed on the module and is to be used on all ends of C70 communica- tion for two and three terminal applications.
  • Page 92 Once the clips have cleared the raised edge of the chassis, engage the clips simultaneously. When the clips have locked into position, the module is fully inserted. 3-34 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 93 Modules shipped since January 2012 have status LEDs that indicate the status of the DIP switches, as shown in the follow- ing figure. Figure 3–40: STATUS LEDS The clock configuration LED status is as follows: • Flashing green — loop timing mode while receiving a valid data packet GE Multilin C70 Capacitor Bank Protection and Control System 3-35...
  • Page 94 Solid yellow — FPGA is receiving a "yellow bit" and remains yellow for each "yellow bit" • Solid red — FPGA is not receiving a valid packet or the packet received is invalid 3-36 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 95: Human Interfaces

    In online mode, you can communicate with the device in real-time. The EnerVista UR Setup software is provided with every C70 relay and runs on Microsoft Windows XP, 7, and Server 2008. This chapter provides a summary of the basic EnerVista UR Setup software interface features. The EnerVista UR Setup Help File provides details for getting started and using the EnerVista UR Setup software interface.
  • Page 96 Site List window are automatically sent to the online communicating device. g) FIRMWARE UPGRADES The firmware of a C70 device can be upgraded, locally or remotely, via the EnerVista UR Setup software. The correspond- ing instructions are provided by the EnerVista UR Setup Help file under the topic “Upgrading Firmware”.
  • Page 97: Enervista Ur Setup Main Window

    Settings list control bar window Device data view windows, with common tool bar Settings file data view windows, with common tool bar Workspace area with data view tabs Status bar 10. Quick action hot links GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 98 4.1 ENERVISTA UR SETUP INTERFACE 4 HUMAN INTERFACES 842786A2.CDR Figure 4–1: ENERVISTA UR SETUP SOFTWARE MAIN WINDOW C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 99: Extended Enervista Ur Setup Features

    Select the Template Mode > Edit Template option to place the device in template editing mode. Enter the template password then click OK. Open the relevant settings windows that contain settings to be specified as viewable. GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 100 The following procedure describes how to add password protection to a settings file template. Select a settings file from the offline window on the left of the EnerVista UR Setup main screen. Selecting the Template Mode > Password Protect Template option. C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 101 The template specifies that only the Pickup Curve Phase time overcurrent settings window without template applied. settings be available. 842858A1.CDR Figure 4–4: APPLYING TEMPLATES VIA THE VIEW IN TEMPLATE MODE COMMAND GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 102 Select an installed device or settings file from the tree menu on the left of the EnerVista UR Setup main screen. Select the Template Mode > Remove Settings Template option. Enter the template password and click OK to continue. C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 103: Securing And Locking Flexlogic Equations

    Click on Save to save and apply changes to the settings template. Select the Template Mode > View In Template Mode option to view the template. Apply a password to the template then click OK to secure the FlexLogic equation. GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 104 FlexLogic entries in a settings file have been secured, use the following procedure to lock the settings file to a specific serial number. Select the settings file in the offline window. Right-click on the file and select the Edit Settings File Properties item. 4-10 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 105: Settings File Traceability

    When a settings file is transferred to a C70 device, the date, time, and serial number of the C70 are sent back to EnerVista UR Setup and added to the settings file on the local PC. This infor- mation can be compared with the C70 actual values at any later date to determine if security has been compromised.
  • Page 106 4 HUMAN INTERFACES The transfer date of a setting file written to a C70 is logged in the relay and can be viewed via EnerVista UR Setup or the front panel display. Likewise, the transfer date of a setting file saved to a local PC is logged in EnerVista UR Setup.
  • Page 107 ONLINE DEVICE TRACEABILITY INFORMATION The C70 serial number and file transfer date are available for an online device through the actual values. Select the Actual Values > Product Info > Model Information menu item within the EnerVista UR Setup online window as shown in the example below.
  • Page 108: Faceplate Interface

    The following figure shows the horizontal arrange- ment of the faceplate panels. Figure 4–16: UR-SERIES STANDARD HORIZONTAL FACEPLATE PANELS 4-14 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 109: Led Indicators

    The status indicators in the first column are described below. • IN SERVICE: This LED indicates that control power is applied, all monitored inputs, outputs, and internal systems are OK, and that the device has been programmed. GE Multilin C70 Capacitor Bank Protection and Control System 4-15...
  • Page 110 Support for applying a customized label beside every LED is provided. Default labels are shipped in the label pack- age of every C70, together with custom templates. The default labels can be replaced by user-printed labels. User customization of LED operation is of maximum benefit in installations where languages other than English are used to communicate with operators.
  • Page 111 User customization of LED operation is of maximum benefit in installations where languages other than English are used to communicate with operators. Refer to the User-programmable LEDs section in chapter 5 for the settings used to program the operation of the LEDs on these panels. GE Multilin C70 Capacitor Bank Protection and Control System 4-17...
  • Page 112: Custom Labeling Of Leds

    EnerVista UR Setup software is installed and operational • The C70 settings have been saved to a settings file • The C70 front panel label cutout sheet (GE Multilin part number 1006-0047) has been downloaded from http://www.gegridsolutions.com/products/support/ur/URLEDenhanced.doc and printed •...
  • Page 113 Enter the text to appear next to each LED and above each user-programmable pushbuttons in the fields provided. Feed the C70 front panel label cutout sheet into a printer and press the Print button in the front panel report window.
  • Page 114 4 HUMAN INTERFACES Bend the tab at the center of the tool tail as shown below. The following procedure describes how to remove the LED labels from the C70 enhanced front panel and insert the custom labels. Use the knife to lift the LED label and slide the label tool underneath. Make sure the bent tabs are pointing away from the relay.
  • Page 115 Slide the new LED label inside the pocket until the text is properly aligned with the LEDs, as shown below. The following procedure describes how to remove the user-programmable pushbutton labels from the C70 enhanced front panel and insert the custom labels.
  • Page 116 Slide the label tool under the user-programmable pushbutton label until the tabs snap out as shown below. This attaches the label tool to the user-programmable pushbutton label. Remove the tool and attached user-programmable pushbutton label as shown below. 4-22 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 117: Display

    INTRODUCTION The C70 can interface with associated circuit breakers. In many cases the application monitors the state of the breaker, that can be presented on faceplate LEDs, along with a breaker trouble indication. Breaker operations can be manually initiated from faceplate keypad or automatically initiated from a FlexLogic operand.
  • Page 118: Menus

    Press the MENU key to select a header display page (top-level menu). The header title appears momentarily followed by a header display page menu item. Each press of the MENU key advances through the following main heading pages: • Actual values • Settings 4-24 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 119 4 HUMAN INTERFACES 4.3 FACEPLATE INTERFACE • Commands • Targets • User displays (when enabled) GE Multilin C70 Capacitor Bank Protection and Control System 4-25...
  • Page 120 Pressing the MESSAGE DOWN key displays the second setting sub-header associ-  PROPERTIES ated with the Product Setup header.  Press the MESSAGE RIGHT key once more to display the first setting for Display FLASH MESSAGE Properties. TIME: 1.0 s 4-26 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 121: Changing Settings

    Text settings have data values which are fixed in length, but user-defined in character. They can be upper case letters, lower case letters, numerals, and a selection of special characters. GE Multilin C70 Capacitor Bank Protection and Control System 4-27...
  • Page 122: Settings

    The information in this section refers to password security. For information on how to set or change CyberSentry pass- words, see the Settings > Product Setup > Security > CyberSentry section in the next chapter. 4-28 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 123 By default, when an incorrect Command or Setting password has been entered via the faceplate interface three times within three minutes, the FlexLogic operand is set to “On” and the C70 does not allow settings or LOCAL ACCESS DENIED command level access via the faceplate interface for the next five minutes.
  • Page 124 FlexLogic operand is set to “Off” after five minutes for a Command password or 30 minutes for a Settings password. These default settings can be changed in EnerVista under Settings > Product Setup > Security. 4-30 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 125: Overview

     SETTINGS  AC INPUTS See page 5-98.  SYSTEM SETUP   POWER SYSTEM See page 5-99.   SIGNAL SOURCES See page 5-101.   BREAKERS See page 5-104.  GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 126 See page 5-230.   MONITORING See page 5-232.  ELEMENTS  SETTINGS  CONTACT INPUTS See page 5-245.  INPUTS / OUTPUTS   VIRTUAL INPUTS See page 5-247.  C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 127 TEST MODE See page 5-267.  TESTING FUNCTION: Disabled TEST MODE FORCING: See page 5-267.  FORCE CONTACT See page 5-268.  INPUTS  FORCE CONTACT See page 5-269.  OUTPUTS GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 128: Introduction To Elements

    In more complex elements, a set of settings may be provided to define the range of the measured parameters which will cause the element to pickup. C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 129: Introduction To Ac Sources

    The same considerations apply to transformer winding 2. The protection elements require access to the net current for transformer protection, but some elements may need access to the individual currents from CT1 and CT2. GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 130 CT/VT MODULE 1 CT/VT MODULE 2 CT/VT MODULE 3 < bank 1 > < bank 3 > < bank 5 > < bank 2 > < bank 4 > < bank 6 > C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 131 Upon startup, the CPU configures the settings required to characterize the current and voltage inputs, and will display them in the appropriate section in the sequence of the banks (as described above) as follows for a maximum configuration: F1, F5, M1, M5, U1, and U5. GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 132: Product Setup

    To reset the unit after a lost password: Email GE customer service at multilin.tech@ge.com with the serial number and using a recognizable corporate email account. Customer service provides a code to reset the relay to the factory defaults.
  • Page 133 When entering a settings or command password via EnerVista or any serial interface, the user must enter the correspond- ing connection password. If the connection is to the back of the C70, the remote password must be used. If the connection is to the RS232 port of the faceplate, the local password must be used.
  • Page 134 When lockout occurs, the LOCAL ACCESS DENIED FlexLogic operands are set to “On”. These operands are returned to the “Off” state upon REMOTE ACCESS DENIED expiration of the lockout. 5-10 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 135 INVALID ATTEMPTS BEFORE LOCKOUT The C70 provides a means to raise an alarm upon failed password entry. Should password verification fail while accessing a password-protected level of the relay (either settings or commands), the FlexLogic operand is UNAUTHORIZED ACCESS asserted.
  • Page 136 It is disabled by default to allow the administrator direct access to the EnerVista software immediately after installation. When security is disabled, all users have administrator access. GE recommends enabling the EnerVista security before placing the device in service.
  • Page 137 Enter a username in the User field. The username must be 4 to 20 characters in length. Select the user access rights by enabling the check box of one or more of the fields. GE Multilin C70 Capacitor Bank Protection and Control System 5-13...
  • Page 138 Deletes the user account when exiting the user management window Actual Values Allows the user to read actual values Settings Allows the user to read setting values Commands Allows the user to execute commands 5-14 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 139 Note that other protocols (DNP, 101, 103, 104, EGD) are not encrypted, and they are good communications options for SCADA systems when CyberSentry is enabled. CYBERSENTRY SETTINGS THROUGH ENERVISTA CyberSentry security settings are configured under Device > Settings > Product Setup > Security. GE Multilin C70 Capacitor Bank Protection and Control System 5-15...
  • Page 140 Number of retries before giving up 9999 Administrator Confirm RADIUS Confirmation of the shared secret. The See the 245 characters Administrator Authentication entry displays as asterisks. Password (Shared) Secret Requirement s section 5-16 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 141 If Yes and a (Administrator if settings change attempt is made, the device Supervisor has alarm activates. If No, the device alarm does not been disabled) activate. GE Multilin C70 Capacitor Bank Protection and Control System 5-17...
  • Page 142: Security

    PRODUCT SETUP SECURITY CHANGE LOCAL PASSWORDS Range: 20 Alphanumeric Characters  CHANGE LOCAL LOGIN:  PASSWORDS None Range: 20 Alphanumeric Characters NEW PASSWORD: MESSAGE Range: 20 Alphanumeric Characters CONFIRM PASSWORD: MESSAGE 5-18 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 143 LOAD FACTORY DEFAULTS: This setting is used to reset all the settings, communication and security passwords. An Administrator role is used to change this setting and a Supervisor role (if not disabled) approves it. GE Multilin C70 Capacitor Bank Protection and Control System 5-19...
  • Page 144 Administrator if the Supervisor role is disabled. The Supervisor role enables this setting for the relay to start accepting setting changes or command changes or firmware upgrade. After all the setting changes are applied or com- mands executed, the Supervisor disables to lock setting changes. 5-20 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 145 Observer). When using a serial connection, only device authentication is supported. When server authentication is required, characteristics for communication with a RADIUS server must be configured. This is possible only in the EnerV- GE Multilin C70 Capacitor Bank Protection and Control System 5-21...
  • Page 146 Date & Timestamp — UTC date and time Username — 255 chars maximum, but in the security log it is truncated to 20 characters IP address — Device IP address 5-22 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 147 Clear energy command was issued RESET_UNAUTH_ACCESS Warning (4) Reset Unauthorized access command was issued CLEAR_TELEPROTECTION_CNT Notice (5) Clear teleprotection counters command was issued CLEAR_ALL_RECS Warning (4) Clear all records command was issued GE Multilin C70 Capacitor Bank Protection and Control System 5-23...
  • Page 148: Display Properties

    Some customers prefer very low currents to display as zero, while others prefer the current be displayed even when the value reflects noise rather than the actual signal. The C70 applies a cut- off value to the magnitudes and angles of the measured currents.
  • Page 149: Clear Relay Records

    Range: FlexLogic operand CLEAR DATA LOGGER: MESSAGE Range: FlexLogic operand RESET UNAUTH ACCESS: MESSAGE Range: FlexLogic operand. CLEAR DIR I/O STATS: MESSAGE Valid only for units with Direct I/O module. GE Multilin C70 Capacitor Bank Protection and Control System 5-25...
  • Page 150: Communications

    Selected records can be cleared from user-programmable conditions with FlexLogic operands. Assigning user-programma- ble pushbuttons to clear specific records are typical applications for these commands. Since the C70 responds to rising edges of the configured FlexLogic operands, they must be asserted for at least 50 ms to take effect.
  • Page 151 ETHERNET NETWORK TOPOLOGY The C70 has three Ethernet ports. Each Ethernet port must belong to a different network or subnetwork. Configure the IP address and subnet to ensure that each port meets this requirement. Two subnets are different when the bitwise AND oper- ation performed between their respective IP address and mask produces a different result.
  • Page 152 In this configuration, P3 uses the IP and MAC address of P2. Figure 5–5: MULTIPLE LANS, WITH REDUNDANCY Public Network SCADA EnerVista Software LAN1 LAN2 LAN2 ML3000 ML3000 ML3000 IP1/ IP2/ IP2/ MAC2 MAC2 MAC1 Redundancy mode 859709A4.vsd 5-28 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 153 IP addresses and mask. Configure the network IP and subnet settings before configuring the rout- ing settings. To obtain a list of all port numbers used, for example for audit purposes, contact GE technical support with substantiating information, such as the serial number and order code of your device.
  • Page 154 2 is performed. The delay in switching back ensures that rebooted switching devices connected to the C70, which signal their ports as active prior to being completely functional, have time to completely initialize themselves and become active. Once port 2 is active again, port 3 returns to standby mode.
  • Page 155 There is a second type of specialized device used in PRP networks, called RedBox, with the role of connecting Single Attached Nodes (SANs) to a redundant network. GE Multilin C70 Capacitor Bank Protection and Control System 5-31...
  • Page 156 When the destination address is 127.0.0.1, the mask and gateway must be also kept on default values. By default, the value of the route gateway address is 127.0.0.1. This means the default route is not configured. To add a route: 5-32 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 157 Starting with UR 7.10, up to six static network routes can be configured in addition to a default route. The default route con- figuration was also moved from the network settings into the routing section. GE Multilin C70 Capacitor Bank Protection and Control System 5-33...
  • Page 158 SHOW ROUTES AND ARP TABLES This feature is available on the Web interface, where the main menu contains an additional Communications menu and two submenus: • Routing Table • ARP Table 5-34 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 159 This allows the EnerVista UR Setup software to be used on the port. The UR operates as a Modbus slave device only. When using Modbus protocol on the RS232 port, the C70 responds regardless of the pro- MODBUS SLAVE ADDRESS grammed.
  • Page 160 Range: 1 to 255 in steps of 1 DNP UNSOL RESPONSE MESSAGE MAX RETRIES: 10 Range: 0 to 65519 in steps of 1 DNP UNSOL RESPONSE MESSAGE DEST ADDRESS: 1 5-36 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 161 DEFAULT VARIATION: 2 Range: 1, 2, 3, 4, 5 DNP OBJECT 30 MESSAGE DEFAULT VARIATION: 1 Range: 1, 2, 3, 4, 5, 7 DNP OBJECT 32 MESSAGE DEFAULT VARIATION: 1 GE Multilin C70 Capacitor Bank Protection and Control System 5-37...
  • Page 162 DNP slave should be assigned a unique address. The C70 can specify a maximum of five clients for its DNP connections. These are IP addresses for the controllers to which the C70 can connect. The settings in this sub-menu are shown below.
  • Page 163 DNP analog input points that are voltages will be returned with values 1000 times smaller (for example, a value of 72000 V on the C70 will be returned as 72). These settings are useful when analog input values must be adjusted to fit within cer- tain ranges in DNP masters.
  • Page 164 60870-5-104 point lists must be in one continuous block, any points assigned after the first “Off” point are ignored. NOTE Changes to the DNP / IEC 60870-5-104 point lists will not take effect until the C70 is restarted. NOTE 5-40...
  • Page 165 The C70 supports the Manufacturing Message Specification (MMS) protocol as specified by IEC 61850. MMS is supported over two protocol stacks: TCP/IP over Ethernet. The C70 operates as an IEC 61850 server. The Remote Inputs and Out- puts section in this chapter describe the peer-to-peer GSSE/GOOSE message scheme.
  • Page 166 IEC 61850 GSSE application ID name string sent as part of each GSSE message. This GSSE ID string identifies the GSSE message to the receiving device. In C70 releases previous to 5.0x, this name string was repre- sented by the setting.
  • Page 167 DESTINATION MAC address; the least significant bit of the first byte must be set. In C70 releases previous to 5.0x, the destination Ethernet MAC address was determined automatically by taking the sending MAC address (that is, the unique, local MAC address of the C70) and setting the multicast bit.
  • Page 168 The C70 has the ability of detecting if a data item in one of the GOOSE datasets is erroneously oscillating. This can be caused by events such as errors in logic programming, inputs improperly being asserted and de-asserted, or failed station components.
  • Page 169 Configure the transmission dataset. Configure the GOOSE service settings. Configure the data. The general steps required for reception configuration are: Configure the reception dataset. Configure the GOOSE service settings. Configure the data. GE Multilin C70 Capacitor Bank Protection and Control System 5-45...
  • Page 170 MMXU1 HZ DEADBAND change greater than 45 mHz, from the previous MMXU1.MX.mag.f value, in the source frequency. The C70 must be rebooted (control power removed and re-applied) before these settings take effect. The following procedure illustrates the reception configuration. Configure the reception dataset by making the following changes in the ...
  • Page 171 IEC61850 GOOSE ANALOG INPUT 1 UNITS The GOOSE analog input 1 can now be used as a FlexAnalog value in a FlexElement or in other settings. The C70 must be rebooted (control power removed and re-applied) before these settings take effect.
  • Page 172 DNA and UserSt bit pairs that are included in GSSE messages. To set up a C70 to receive a configurable GOOSE dataset that contains two IEC 61850 single point status indications, the following dataset items can be selected (for example, for configurable GOOSE dataset 1): “GGIO3.ST.Ind1.stVal” and “GGIO3.ST.Ind2.stVal”.
  • Page 173 CPU resources. When server scanning is disabled, there is no updating of the IEC 61850 logical node status values in the C70. Clients are still able to connect to the server (C70 relay), but most data values are not updated. This set- ting does not affect GOOSE/GSSE operation.
  • Page 174 (_) character, and the first character in the prefix must be a letter. This conforms to the IEC 61850 standard. Changes to the logical node prefixes will not take effect until the C70 is restarted. The main menu for the IEC 61850 MMXU deadbands is shown below.
  • Page 175 The GGIO2 control configuration settings are used to set the control model for each input. The available choices are “0” (status only), “1” (direct control), and “2” (SBO with normal security). The GGIO2 control points are used to control the C70 virtual inputs.
  • Page 176 GGIO1 (binary status values). The settings allow the selection of FlexInteger values for each GGIO5 integer value point. It is intended that clients use GGIO5 to access generic integer values from the C70. Additional settings are provided to allow the selection of the number of integer values available in GGIO5 (1 to 16), and to assign FlexInteger values to the GGIO5 integer inputs.
  • Page 177 ITEM 64 attributes supported by the C70. Changes to the dataset will only take effect when the C70 is restarted. It is recommended to use reporting service from logical node LLN0 if a user needs some (but not all) data from already existing GGIO1, GGIO4, and MMXU4 points and their quantity is not greater than 64 minus the number items in this dataset.
  • Page 178 XCBR operating counter status attribute (OpCnt) increments with every operation. Frequent breaker operation can result in very large OpCnt values over time. This setting allows the OpCnt to be reset to “0” for XCBR1. 5-54 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 179 Since GSSE/GOOSE messages are multicast Ethernet by specification, they are not usually be forwarded by net- work routers. However, GOOSE messages may be forwarded by routers if the router has been configured for VLAN functionality. NOTE GE Multilin C70 Capacitor Bank Protection and Control System 5-55...
  • Page 180 Menu”. Web pages are available showing DNP and IEC 60870-5-104 points lists, Modbus registers, event records, fault reports, and so on. First connect the UR and a computer to an Ethernet network, then enter the IP address of the C70 Ethernet port employed into the “Address”...
  • Page 181 PROTOCOL connected to a maximum of two masters (usually either an RTU or a SCADA master station). Since the C70 maintains two sets of IEC 60870-5-104 data change buffers, no more than two masters should actively communicate with the C70 at one time.
  • Page 182 MESSAGE 0.0.0.0 The C70 can specify a maximum of five clients for its IEC 104 connections. These are IP addresses for the controllers to which the C70 can connect. A maximum of two simultaneous connections are supported at any given time.
  • Page 183 Spontaneous transmission occurs as a response to cyclic Class 2 requests. If the C70 wants to transmit Class 1 data at that time, it demands access for Class 1 data transmission (ACD=1 in the con- trol field of the response).
  • Page 184   MEASURANDS Range: see sub-menu below  ASDU 2 MESSAGE  Range: see sub-menu below  ASDU 3 MESSAGE  Range: see sub-menu below  ASDU 4 MESSAGE  5-60 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 185 Range: 0.000 to 65.535 in steps of 0.001 ASDU 4 ANALOG 9 MESSAGE FACTOR: 1.000 Range: -32768 to 32767 in steps of 1 ASDU 4 ANALOG 9 MESSAGE OFFSET: 0 GE Multilin C70 Capacitor Bank Protection and Control System 5-61...
  • Page 186 FlexAnalog operands. The measurands sent are voltage, current, power, power fac- tor, and frequency. If any other FlexAnalog is chosen, the C70 sends 0 instead of its value. Note that the power is transmit- ted in KW, not W.
  • Page 187 ASDU command comes. A list of available mappings is provided on the C70. This includes 64 virtual inputs (see the following table). The ON and OFF for the same ASDU command can be mapped to different virtual inputs.
  • Page 188: Modbus User Map

    A setting of None causes the RTC and the synchrophasor clock to free-run until the clock is 5-64 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 189 Range: 0 to 60 000 ns in steps of 1 PORT 1 PATH DELAY MESSAGE ADDER: 00000 ns Range: –1 000 to +1 000 ns in steps of 1 PORT 1 PATH DELAY MESSAGE ASYMMETRY: 0000 ns GE Multilin C70 Capacitor Bank Protection and Control System 5-65...
  • Page 190 This setting selects the value of the priority field in the 802.1Q VLAN tag in request messages issued by the relay’s peer delay mechanism. In compliance with PP the default VLAN priority is 4, but it is recommended that in accordance with PTP it be set to 7. 5-66 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 191 The C70 supports the Simple Network Time Protocol specified in RFC-2030. With SNTP, the C70 can obtain clock time over an Ethernet network. The C70 acts as an SNTP client to receive time values from an SNTP/NTP server, usually a ded- icated product using a GPS receiver to provide an accurate time.
  • Page 192 C70 clock is closely synchronized with the SNTP/NTP server. It takes up to two minutes for the C70 to signal an SNTP self-test error if the server is offline.
  • Page 193: User-Programmable Fault Reports

    The user programmable record contains the following information: the user-programmed relay name, detailed firmware revision (7.2x, for example) and relay model (C70), the date and time of trigger, the name of pre-fault trigger (a specific FlexLogic operand), the name of fault trigger (a specific FlexLogic operand), the active setting group at pre-fault trigger, the active setting group at fault trigger, pre-fault values of all programmed analog channels (one cycle before pre-fault trigger), and fault values of all programmed analog channels (at the fault trigger).
  • Page 194: Oscillography

    64 samples per cycle; that is, it has no effect on the fundamental calculations of the device. When changes are made to the oscillography settings, all existing oscillography records will be CLEARED. NOTE 5-70 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 195 IB signal on terminal 2 of the CT/VT module in slot F. If there are no CT/VT modules and analog input modules, no analog traces will appear in the file; only the digital traces will appear. GE Multilin C70 Capacitor Bank Protection and Control System 5-71...
  • Page 196: Data Logger

    The relay automatically partitions the available memory between the channels in use. Exam- ple storage capacities for a system frequency of 60 Hz are shown in the following table. 5-72 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 197 • DATA LOGGER CONFIG: This display presents the total amount of time the Data Logger can record the channels not selected to “Off” without over-writing old data. GE Multilin C70 Capacitor Bank Protection and Control System 5-73...
  • Page 198: User-Programmable Leds

    The test responds to the position and rising edges of the control input defined by the set- LED TEST CONTROL ting. The control pulses must last at least 250 ms to take effect. The following diagram explains how the test is executed. 5-74 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 199 2. Once stage 2 has started, the pushbutton can be released. When stage 2 is completed, stage 3 will automatically start. The test may be aborted at any time by pressing the pushbutton. GE Multilin C70 Capacitor Bank Protection and Control System 5-75...
  • Page 200 LED 8 operand LED 20 operand LED 9 operand LED 21 operand LED 10 operand LED 22 operand LED 11 operand LED 23 operand LED 12 operand LED 24 operand 5-76 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 201: User-Programmable Self Tests

    ANY SELF-TEST minor alarms continue to function along with other major and minor alarms. See the Relay Self-tests section in chapter 7 for information on major and minor self-test alarms. GE Multilin C70 Capacitor Bank Protection and Control System 5-77...
  • Page 202: Control Pushbuttons

    The location of the control pushbuttons are shown in the following figures. Control pushbuttons 842813A1.CDR Figure 5–10: CONTROL PUSHBUTTONS (ENHANCED FACEPLATE) An additional four control pushbuttons are included on the standard faceplate when the C70 is ordered with the 12 user- programmable pushbutton option. STATUS EVENT CAUSE...
  • Page 203 BREAKERS/BREAKER 1/ BREAKER 1 PUSHBUTTON CONTROL Enabled=1 TIMER FLEXLOGIC OPERAND SYSTEM SETUP/ BREAKERS/BREAKER 2/ CONTROL PUSHBTN 1 ON 100 msec BREAKER 2 PUSHBUTTON CONTROL 842010A2.CDR Enabled=1 Figure 5–12: CONTROL PUSHBUTTON LOGIC GE Multilin C70 Capacitor Bank Protection and Control System 5-79...
  • Page 204: User-Programmable Pushbuttons

    FlexLogic equations, protection elements, and control elements. Typical applications include breaker control, autorecloser blocking, and setting groups changes. The user-programmable pushbuttons are under the control level of password protection. The user-configurable pushbuttons for the enhanced faceplate are shown below. 5-80 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 205 The pulse duration of the remote set, remote reset, or local pushbutton must be at least 50 ms to operate the push- button. This allows the user-programmable pushbuttons to properly operate during power cycling events and vari- ous system disturbances that may cause transient assertion of the operating signals. NOTE GE Multilin C70 Capacitor Bank Protection and Control System 5-81...
  • Page 206 PUSHBTN 1 RESET • PUSHBTN 1 LOCAL: This setting assigns the FlexLogic operand serving to inhibit pushbutton operation from the front panel pushbuttons. This locking functionality is not applicable to pushbutton autoreset. 5-82 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 207 “High Priority” or “Normal”. PUSHBTN 1 MESSAGE • PUSHBUTTON 1 EVENTS: If this setting is enabled, each pushbutton state change will be logged as an event into event recorder. GE Multilin C70 Capacitor Bank Protection and Control System 5-83...
  • Page 208 SETTING Autoreset Delay Autoreset Function = Enabled = Disabled SETTING Drop-Out Timer TIMER FLEXLOGIC OPERAND 200 ms PUSHBUTTON 1 ON 842021A3.CDR Figure 5–15: USER-PROGRAMMABLE PUSHBUTTON LOGIC (Sheet 1 of 2) 5-84 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 209 This can be done via EnerVista UR Setup with the Maintenance > Enable Pushbutton command. NOTE GE Multilin C70 Capacitor Bank Protection and Control System 5-85...
  • Page 210: Flex State Parameters

    USER-PROGRAMMABLE CONTROL INPUT: The user-definable displays also respond to the INVOKE AND SCROLL setting. Any FlexLogic operand (in particular, the user-programmable pushbutton operands), can be used to navigate the programmed displays. 5-86 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 211 (setting, actual value, or command) which has a Modbus address, to view the hexadecimal form of the Modbus address, then manually convert it to decimal form before entering it (EnerVista UR Setup usage conveniently facilitates this conversion). GE Multilin C70 Capacitor Bank Protection and Control System 5-87...
  • Page 212 If the parameters for the top line and the bottom line items have the same units, then the unit is displayed on the bottom line only. The units are only displayed on both lines if the units specified both the top and bottom line items are different. NOTE 5-88 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 213: Direct Inputs And Outputs

    “Yes”), all direct output messages should be received back. If not, the direct input/output ring CH2 RING CONFIGURATION break self-test is triggered. The self-test error is signaled by the FlexLogic operand. DIRECT RING BREAK GE Multilin C70 Capacitor Bank Protection and Control System 5-89...
  • Page 214 64 kbps Channel 1 64 kbps Channel 2 64 kbps The G.703 modules are fixed at 64 kbps. The setting is not applicable to these modules. DIRECT I/O DATA RATE NOTE 5-90 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 215 UR IED 4 UR IED 2 UR IED 3 842712A1.CDR Figure 5–18: SAMPLE INTERLOCKING BUSBAR PROTECTION SCHEME For increased reliability, a dual-ring configuration (shown below) is recommended for this application. GE Multilin C70 Capacitor Bank Protection and Control System 5-91...
  • Page 216 The complete application requires addressing a number of issues such as failure of both the communications rings, failure or out-of-service conditions of one of the relays, etc. Self-monitoring flags of the direct inputs and outputs feature would be primarily used to address these concerns. 5-92 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 217 Inputs and Outputs section. A blocking pilot-aided scheme should be implemented with more security and, ideally, faster message delivery time. This is accomplished using a dual-ring configuration as shown here. GE Multilin C70 Capacitor Bank Protection and Control System 5-93...
  • Page 218 EVENTS: Disabled The C70 checks integrity of the incoming direct input and output messages using a 32-bit CRC. The CRC alarm function is available for monitoring the communication medium noise by tracking the rate of messages failing the CRC check. The monitoring function counts all incoming messages, including messages that failed the CRC check.
  • Page 219 MESSAGE EVENTS: Disabled The C70 checks integrity of the direct input and output communication ring by counting unreturned messages. In the ring configuration, all messages originating at a given device should return within a pre-defined period of time. The unreturned messages alarm function is available for monitoring the integrity of the communication ring by tracking the rate of unre- turned messages.
  • Page 220: Installation

    "Programmed" state. UNIT NOT PROGRAMMED setting allows the user to uniquely identify a relay. This name will appear on generated reports. RELAY NAME 5-96 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 221: Remote Resources Configuration

    Bricks. Remote resources settings configure the point-to-point connection between specific fiber optic ports on the C70 process card and specific Brick. The relay is then configured to measure spe- cific currents, voltages and contact inputs from those Bricks, and to control specific outputs.
  • Page 222: System Setup

    1 pu will operate on 1000 A primary. The same rule applies for current sums from CTs with different secondary taps (5 A and 1 A). 5-98 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 223: Power System

    GE Multilin C70 Capacitor Bank Protection and Control System 5-99...
  • Page 224 “Disabled” only in unusual circumstances; consult the factory for special variable- FREQUENCY TRACKING frequency applications. NOTE The frequency tracking feature functions only when the C70 is in the “Programmed” mode. If the C70 is “Not Pro- grammed”, then metering values are available but can exhibit significant errors. NOTE 5-100...
  • Page 225: Signal Sources

    CT wiring problem. A disturbance detector is provided for each source. The 50DD function responds to the changes in magnitude of the sequence currents. The disturbance detector scheme logic is as follows: GE Multilin C70 Capacitor Bank Protection and Control System 5-101...
  • Page 226 This configuration could be used on a two-winding transformer, with one winding connected into a breaker-and-a-half sys- tem. The following figure shows the arrangement of sources used to provide the functions required in this application, and the CT/VT inputs that are used to provide the data. 5-102 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 227 Figure 5–25: EXAMPLE USE OF SOURCES Y LV D HV SRC 1 SRC 2 SRC 3 Phase CT F1+F5 None Ground CT None None Phase VT None None Aux VT None None GE Multilin C70 Capacitor Bank Protection and Control System 5-103...
  • Page 228: Breakers

    Range: 0.000 to 65.535 s in steps of 0.001 MANUAL CLOSE RECAL1 MESSAGE TIME: 0.000 s Range: FlexLogic operand BREAKER 1 OUT OF SV: MESSAGE Range: Disabled, Enabled BREAKER 1 EVENTS: MESSAGE Disabled 5-104 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 229 1. The number of breaker control elements is dependent on the number of CT/VT modules specified with the C70. The follow- ing settings are available for each breaker control element.
  • Page 230 5.4 SYSTEM SETUP 5 SETTINGS Figure 5–26: DUAL BREAKER CONTROL SCHEME LOGIC (Sheet 1 of 2) IEC 61850 functionality is permitted when the C70 is in “Programmed” mode and not in the local control mode. NOTE 5-106 C70 Capacitor Bank Protection and Control System...
  • Page 231 Note that IEC 61850 commands are event-driven and dwell time for these is one protection pass only. If you want to main- tain the close/open command for a certain time, do so either on the contact outputs using the "Seal-in" setting or in Flex- Logic. GE Multilin C70 Capacitor Bank Protection and Control System 5-107...
  • Page 232: Disconnect Switches

    SWITCH 1 MODE: This setting selects “3-Pole” mode, where disconnect switch poles have a single common auxiliary switch, or “1-Pole” mode where each disconnect switch pole has its own auxiliary switch. 5-108 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 233 This allows for non-simultaneous operation of the poles. IEC 61850 functionality is permitted when the C70 is in “Programmed” mode and not in the local control mode. NOTE GE Multilin...
  • Page 234 5.4 SYSTEM SETUP 5 SETTINGS Figure 5–28: DISCONNECT SWITCH SCHEME LOGIC 5-110 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 235: Flexcurves

    0.88 15.5 0.50 0.90 16.0 0.52 0.91 16.5 0.54 0.92 17.0 0.56 0.93 17.5 0.58 0.94 18.0 0.60 0.95 18.5 0.62 0.96 19.0 0.64 0.97 19.5 0.66 0.98 10.0 20.0 GE Multilin C70 Capacitor Bank Protection and Control System 5-111...
  • Page 236 The multiplier and adder settings only affect the curve portion of the characteristic and not the MRT and HCT set- tings. The HCT settings override the MRT settings for multiples of pickup greater than the HCT ratio. NOTE 5-112 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 237 EnerVista UR Setup software generates an error message and discards the proposed changes. NOTE e) STANDARD RECLOSER CURVES The standard recloser curves available for the C70 are displayed in the following graphs. GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 238 Figure 5–32: RECLOSER CURVES GE101 TO GE106 GE142 GE138 GE120 GE113 0.05 7 8 9 10 12 CURRENT (multiple of pickup) 842725A1.CDR Figure 5–33: RECLOSER CURVES GE113, GE120, GE138 AND GE142 5-114 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 239 Figure 5–34: RECLOSER CURVES GE134, GE137, GE140, GE151 AND GE201 GE152 GE141 GE131 GE200 7 8 9 10 12 CURRENT (multiple of pickup) 842728A1.CDR Figure 5–35: RECLOSER CURVES GE131, GE141, GE152, AND GE200 GE Multilin C70 Capacitor Bank Protection and Control System 5-115...
  • Page 240 GE132 GE139 GE136 GE116 0.05 GE117 GE118 0.02 0.01 7 8 9 10 12 CURRENT (multiple of pickup) 842726A1.CDR Figure 5–37: RECLOSER CURVES GE116, GE117, GE118, GE132, GE136, AND GE139 5-116 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 241 Figure 5–38: RECLOSER CURVES GE107, GE111, GE112, GE114, GE115, GE121, AND GE122 GE202 GE135 GE119 7 8 9 10 12 CURRENT (multiple of pickup) 842727A1.CDR Figure 5–39: RECLOSER CURVES GE119, GE135, AND GE202 GE Multilin C70 Capacitor Bank Protection and Control System 5-117...
  • Page 242: Flexlogic

    Figure 5–40: UR ARCHITECTURE OVERVIEW The states of all digital signals used in the C70 are represented by flags (or FlexLogic operands, which are described later in this section). A digital “1” is represented by a 'set' flag. Any external contact change-of-state can be used to block an ele- ment from operating, as an input to a control feature in a FlexLogic equation, or to operate a contact output.
  • Page 243 The virtual input is presently in the ON state Virtual Output Virt Op 1 On The virtual output is presently in the set state (i.e. evaluation of the equation which produces this virtual output results in a "1") GE Multilin C70 Capacitor Bank Protection and Control System 5-119...
  • Page 244 5.5 FLEXLOGIC 5 SETTINGS The operands available for this relay are listed alphabetically by types in the following table. Table 5–15: C70 FLEXLOGIC OPERANDS (Sheet 1 of 10) OPERAND TYPE OPERAND SYNTAX OPERAND DESCRIPTION CONTROL CONTROL PUSHBTN 1 ON Control pushbutton 1 is being pressed...
  • Page 245 5 SETTINGS 5.5 FLEXLOGIC Table 5–15: C70 FLEXLOGIC OPERANDS (Sheet 2 of 10) OPERAND TYPE OPERAND SYNTAX OPERAND DESCRIPTION ELEMENT: BANK OV 1 STG 1A PKP Bank overvoltage element 1 picked up in phase A of stage 1 Bank phase...
  • Page 246 5.5 FLEXLOGIC 5 SETTINGS Table 5–15: C70 FLEXLOGIC OPERANDS (Sheet 3 of 10) OPERAND TYPE OPERAND SYNTAX OPERAND DESCRIPTION ELEMENT: BREAKER 1 OFF CMD Breaker 1 open command initiated Breaker control BREAKER 1 ON CMD Breaker 1 close command initiated BREAKER 1 ΦA BAD ST...
  • Page 247 5 SETTINGS 5.5 FLEXLOGIC Table 5–15: C70 FLEXLOGIC OPERANDS (Sheet 4 of 10) OPERAND TYPE OPERAND SYNTAX OPERAND DESCRIPTION ELEMENT: CUR BAL 1 STG1A PKP Phase current unbalance element 1 picked up in phase A of stage 1 Phase current...
  • Page 248 5.5 FLEXLOGIC 5 SETTINGS Table 5–15: C70 FLEXLOGIC OPERANDS (Sheet 5 of 10) OPERAND TYPE OPERAND SYNTAX OPERAND DESCRIPTION ELEMENT: MONTH JANUARY Current month is January Time of day timer MONTH FEBRUARY Current month is February month MONTH MARCH Current month is March...
  • Page 249 5 SETTINGS 5.5 FLEXLOGIC Table 5–15: C70 FLEXLOGIC OPERANDS (Sheet 6 of 10) OPERAND TYPE OPERAND SYNTAX OPERAND DESCRIPTION ELEMENT: NTRL VOLT 1 STG1 PKP Neutral voltage unbalance element 1 picked up in stage 1 Neutral voltage NTRL VOLT 1 STG2 PKP...
  • Page 250 5.5 FLEXLOGIC 5 SETTINGS Table 5–15: C70 FLEXLOGIC OPERANDS (Sheet 7 of 10) OPERAND TYPE OPERAND SYNTAX OPERAND DESCRIPTION ELEMENT: SELECTOR 1 POS Y Selector switch 1 is in Position Y (mutually exclusive operands) Selector switch SELECTOR 1 BIT 0...
  • Page 251 5 SETTINGS 5.5 FLEXLOGIC Table 5–15: C70 FLEXLOGIC OPERANDS (Sheet 8 of 10) OPERAND TYPE OPERAND SYNTAX OPERAND DESCRIPTION ELEMENT TRIP BUS 1 PKP Asserted when the trip bus 1 element picks up Trip bus TRIP BUS 1 OP Asserted when the trip bus 1 element operates...
  • Page 252 5.5 FLEXLOGIC 5 SETTINGS Table 5–15: C70 FLEXLOGIC OPERANDS (Sheet 9 of 10) OPERAND TYPE OPERAND SYNTAX OPERAND DESCRIPTION INPUTS/OUTPUTS: Virt Ip 1 Flag is set, logic=1 Virtual inputs Virt Ip 2 Flag is set, logic=1 Virt Ip 3 Flag is set, logic=1 ↓...
  • Page 253 5 SETTINGS 5.5 FLEXLOGIC Table 5–15: C70 FLEXLOGIC OPERANDS (Sheet 10 of 10) OPERAND TYPE OPERAND SYNTAX OPERAND DESCRIPTION SELF- ANY MAJOR ERROR Any of the major self-test errors generated (major error) DIAGNOSTICS ANY MINOR ERROR Any of the minor self-test errors generated (minor error)
  • Page 254: Flexlogic Rules

    When making changes to FlexLogic entries in the settings, all FlexLogic equations are re-compiled whenever any new FlexLogic entry value is entered, and as a result of the re-compile all latches are reset automatically. 5-130 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 255: Flexlogic Example

    State=Pickup (200 ms) DIGITAL ELEMENT 2 Timer 1 State=Operated Time Delay on Pickup (800 ms) CONTACT INPUT H1c State=Closed VIRTUAL OUTPUT 3 827026A2.VSD Figure 5–42: LOGIC EXAMPLE WITH VIRTUAL OUTPUTS GE Multilin C70 Capacitor Bank Protection and Control System 5-131...
  • Page 256 Following the procedure outlined, start with parameter 99, as follows: 99: The final output of the equation is virtual output 3, which is created by the operator "= Virt Op n". This parameter is therefore "= Virt Op 3." 5-132 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 257 86: The upper input to OR #1 is operand “Virt Op 1 On". 85: The last parameter is used to set the latch, and is operand “Virt Op 4 On". GE Multilin C70 Capacitor Bank Protection and Control System 5-133...
  • Page 258 In the following equation, virtual output 3 is used as an input to both latch 1 and timer 1 as arranged in the order shown below: DIG ELEM 2 OP Cont Ip H1c On AND(2) 5-134 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 259: Flexlogic Equation Editor

    TIMER 1 TYPE: This setting is used to select the time measuring unit. • TIMER 1 PICKUP DELAY: Sets the time delay to pickup. If a pickup delay is not required, set this function to "0". GE Multilin C70 Capacitor Bank Protection and Control System 5-135...
  • Page 260: Flexelements

    The element can be programmed to respond either to a signal level or to a rate-of-change (delta) over a pre-defined period of time. The output operand is asserted when the operating signal is higher than a threshold or lower than a threshold as per user's choice. 5-136 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 261 The FLEXELEMENT 1 DIRECTION following figure explains the application of the FLEXELEMENT 1 DIRECTION FLEXELEMENT 1 PICKUP FLEXELEMENT 1 HYS- settings. TERESIS GE Multilin C70 Capacitor Bank Protection and Control System 5-137...
  • Page 262 Figure 5–49: FLEXELEMENT DIRECTION, PICKUP, AND HYSTERESIS In conjunction with the setting the element could be programmed to provide two extra charac- FLEXELEMENT 1 INPUT MODE teristics as shown in the figure below. 5-138 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 263 = maximum nominal primary RMS value of the +IN and –IN inputs BASE SOURCE POWER = maximum value of V × I for the +IN and –IN inputs BASE BASE BASE GE Multilin C70 Capacitor Bank Protection and Control System 5-139...
  • Page 264 FLEXELEMENT 1 COMP MODE This setting specifies the pickup delay of the element. The setting FLEXELEMENT 1 PKP DELAY FLEXELEMENT 1 RST DELAY specifies the reset delay of the element. 5-140 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 265: Non-Volatile Latches

    LATCH N LATCH N TYPE RESET Reset Dominant Previous Previous State State Dominant Previous Previous State State Figure 5–51: NON-VOLATILE LATCH OPERATION TABLE (N = 1 to 16) AND LOGIC GE Multilin C70 Capacitor Bank Protection and Control System 5-141...
  • Page 266: Grouped Elements

    (see the Control elements section for additional details). If the device incorrectly switches to group 1 after power cycling, upgrade the firmware to version 7.25, 7.31, or later to cor- rect this issue. 5-142 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 267 Range: 0.001 to 30.000 pu in steps of 0.001 BF1 N AMP HISET MESSAGE PICKUP: 1.050 pu Range: 0.001 to 30.000 pu in steps of 0.001 BF1 PH AMP LOSET MESSAGE PICKUP: 1.050 pu GE Multilin C70 Capacitor Bank Protection and Control System 5-143...
  • Page 268 5-144 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 269 BREAKER FAILURE TIMER No. 2 (±1/8 cycle) INITIATE (1/8 cycle) BREAKER FAILURE CURRENT DETECTOR PICKUP (1/8 cycle) BREAKER FAILURE OUTPUT RELAY PICKUP (1/4 cycle) FAULT cycles OCCURS 827083A6.CDR Figure 5–52: BREAKER FAILURE MAIN PATH SEQUENCE GE Multilin C70 Capacitor Bank Protection and Control System 5-145...
  • Page 270 In microprocessor relays this time is not significant. In C70 relays, which use a Fourier transform, the calculated current magnitude will ramp-down to zero one power frequency cycle after the current is interrupted, and this lag should be included in the overall margin duration, as it occurs after current interruption.
  • Page 271 Upon operation of the breaker failure element for a single pole trip command, a three-pole trip command should be given via output operand BKR FAIL 1 TRIP OP GE Multilin C70 Capacitor Bank Protection and Control System 5-147...
  • Page 272 5.6 GROUPED ELEMENTS 5 SETTINGS Figure 5–54: SINGLE-POLE BREAKER FAILURE, INITIATE 5-148 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 273 5 SETTINGS 5.6 GROUPED ELEMENTS Figure 5–55: SINGLE-POLE BREAKER FAILURE, TIMERS GE Multilin C70 Capacitor Bank Protection and Control System 5-149...
  • Page 274 5.6 GROUPED ELEMENTS 5 SETTINGS Figure 5–56: THREE-POLE BREAKER FAILURE, INITIATE 5-150 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 275 5 SETTINGS 5.6 GROUPED ELEMENTS Figure 5–57: THREE-POLE BREAKER FAILURE, TIMERS GE Multilin C70 Capacitor Bank Protection and Control System 5-151...
  • Page 276  UNBALANCE 3 b) INVERSE TOC CURVE CHARACTERISTICS The inverse time overcurrent curves used by the time overcurrent elements are the IEEE, IEC, GE Type IAC, and I t stan- dard curve shapes. This allows for simplified coordination with downstream devices.
  • Page 277 22.819 14.593 11.675 10.130 9.153 8.470 7.960 7.562 7.241 51.512 30.426 19.458 15.567 13.507 12.204 11.294 10.614 10.083 9.654 10.0 64.390 38.032 24.322 19.458 16.883 15.255 14.117 13.267 12.604 12.068 GE Multilin C70 Capacitor Bank Protection and Control System 5-153...
  • Page 278 0.668 0.526 0.451 0.404 0.371 0.346 0.327 0.311 0.80 2.446 1.423 0.890 0.702 0.602 0.538 0.494 0.461 0.435 0.415 1.00 3.058 1.778 1.113 0.877 0.752 0.673 0.618 0.576 0.544 0.518 5-154 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 279 = characteristic constant, and T = reset time in seconds (assuming energy capacity is 100% RESET is “Timed”) RESET Table 5–24: GE TYPE IAC INVERSE TIME CURVE CONSTANTS IAC CURVE SHAPE IAC Extreme Inverse 0.0040 0.6379 0.6200 1.7872 0.2461...
  • Page 280 = Reset Time in seconds (assuming energy capacity is 100% and RESET: Timed) RESET RECLOSER CURVES: The C70 uses the FlexCurve feature to facilitate programming of 41 recloser curves. See the FlexCurve section in this chapter for details. 5-156 C70 Capacitor Bank Protection and Control System...
  • Page 281 (see the figure below); the pickup level is calculated as ‘Mvr’ times the setting. If the voltage restraint PHASE TOC1 PICKUP feature is disabled, the pickup level always remains at the setting value. GE Multilin C70 Capacitor Bank Protection and Control System 5-157...
  • Page 282 5.6 GROUPED ELEMENTS 5 SETTINGS Phase-Phase Voltage ÷ VT Nominal Phase-phase Voltage 818784A4.CDR Figure 5–58: PHASE TIME OVERCURRENT VOLTAGE RESTRAINT CHARACTERISTIC Figure 5–59: PHASE TIME OVERCURRENT 1 SCHEME LOGIC 5-158 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 283 The input current is the fundamental phasor magnitude. For timing curves, see the publication Instan- taneous Overcurrent Element Response to Saturated Waveforms in UR-Series Relays (GET-8400A). Figure 5–60: PHASE INSTANTANEOUS OVERCURRENT 1 SCHEME LOGIC GE Multilin C70 Capacitor Bank Protection and Control System 5-159...
  • Page 284 Phasors for Phase A Polarization: × VPol = VBC (1/_ECA) = polarizing voltage IA = operating current ECA = Element Characteristic Angle at 30° 827800A2.CDR Figure 5–61: PHASE A DIRECTIONAL POLARIZATION 5-160 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 285 When set to "Yes", the directional element blocks the operation of any phase overcurrent element under directional control, when voltage memory expires; when set to "No", the directional element allows tripping of phase overcurrent elements under directional control. GE Multilin C70 Capacitor Bank Protection and Control System 5-161...
  • Page 286 If current reversal is of a concern, a longer delay – in the order of 20 ms – may be needed. Figure 5–62: PHASE DIRECTIONAL SCHEME LOGIC 5-162 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 287 Range: 0.00 to 600.00 s in steps of 0.01 CUR UNBALCE 1 STG 2 MESSAGE PKP DELAY: 10.00 s Range: 0.00 to 600.00 s in steps of 0.01 CUR UNBALCE 1 STG 3 MESSAGE PKP DELAY: 1.00 s GE Multilin C70 Capacitor Bank Protection and Control System 5-163...
  • Page 288 SOURCE CT bank Grounding method not relevant, neutral points must be connected together 8347516A1.CDR Figure 5–63: PHASE CURRENT UNBALANCE BASIC CONNECTIONS The following settings are available for all three elements. 5-164 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 289 At minimum this function shall be blocked when the two banks are not paralleled. Note that when unblocked, the function becomes operational after five cycles of intentional delay. High-set instantaneous protection on energization can be provided by a separate instantaneous overcurrent function. GE Multilin C70 Capacitor Bank Protection and Control System 5-165...
  • Page 290 See page 5–168.   NEUTRAL IOC2 MESSAGE See page 5–168.  ↓  NEUTRAL IOC12 MESSAGE See page 5–168.   NEUTRAL MESSAGE See page 5–169.  DIRECTIONAL OC1 5-166 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 291 See page 5–173.  UNBALANCE 3 The C70 contains protection elements for neutral time overcurrent (ANSI device 51G), neutral instantaneous overcurrent (ANSI device 50G), and neutral current unbalance (ANSI device 60N). A maximum of six ground time overcurrent and twelve ground instantaneous overcurrent elements are available, dependent on the CT/VT modules ordered with the relay.
  • Page 292 × Kx I_1 where K 1 16 ⁄ (EQ 5.15) – The positive-sequence restraint allows for more sensitive settings by counterbalancing spurious zero-sequence currents resulting from 5-168 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 293 Range: 40 to 90° in steps of 1 NEUTRAL DIR OC1 REV MESSAGE LIMIT ANGLE: 90° Range: 0.006 to 30.000 pu in steps of 0.001 NEUTRAL DIR OC1 REV MESSAGE PICKUP: 0.050 pu GE Multilin C70 Capacitor Bank Protection and Control System 5-169...
  • Page 294 –V_0 + Z_offset × I_0 I_0 × 1∠ECA = 3 × (|I_0|) if |I | ≤ 0.8 pu Forward Dual, Dual-V, Dual-I –V_0 + Z_offset × I_0 –I_0 × 1∠ECA Reverse –I_0 5-170 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 295 V_0 calculated from the phase voltages, or the zero-sequence voltage supplied externally as the auxiliary voltage V_X, both from the NEUTRAL DIR OC1 SOURCE GE Multilin C70 Capacitor Bank Protection and Control System 5-171...
  • Page 296 180°. • NEUTRAL DIR OC1 FWD LIMIT ANGLE: This setting defines a symmetrical (in both directions from the ECA) limit angle for the forward direction. 5-172 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 297 NTRL CUR UNBALCE 1  UNBALANCE 1 FUNCTION: Disabled Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6 NTRL CUR UNBALCE 1 MESSAGE BANK SOURCE: SRC 1 GE Multilin C70 Capacitor Bank Protection and Control System 5-173...
  • Page 298 NTRL CUR UNBALCE 1 MESSAGE TARGET: Self-Reset Range: Disabled, Enabled NTRL CUR UNBALCE 1 MESSAGE EVENTS: Disabled Up to three identical neutral current unbalance elements, one per each installed CT/VT module. 5-174 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 299 Without the phase currents configured under this source, the function would run only if the magnitude of the inherent unbalance factor is set to zero. GE Multilin C70 Capacitor Bank Protection and Control System 5-175...
  • Page 300 At minimum this function shall be blocked when the two banks are not paralleled. Note that when unblocked, the function becomes operational after five cycles of intentional delay. High-set instantaneous protection on energization can be provided by a separate instantaneous overcurrent function. 5-176 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 301 5 SETTINGS 5.6 GROUPED ELEMENTS Figure 5–70: NEUTRAL CURRENT UNBALANCE SCHEME LOGIC GE Multilin C70 Capacitor Bank Protection and Control System 5-177...
  • Page 302 The ground current input value is the quantity measured by the ground input CT and is the funda- mental phasor or RMS magnitude. Two methods of resetting operation are available: “Timed” and “Instantaneous” (see the 5-178 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 303 The ground instantaneous overcurrent element may be used as an instantaneous element with no intentional delay or as a definite time element. The ground current input is the quantity measured by the ground input CT and is the fundamental phasor magnitude. GE Multilin C70 Capacitor Bank Protection and Control System 5-179...
  • Page 304   NEG SEQ IOC2 MESSAGE See page 5–182.   NEG SEQ DIR OC1 MESSAGE See page 5–183.   NEG SEQ DIR OC2 MESSAGE See page 5–183.  5-180 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 305 For example, if the element reset characteristic is set to “Instanta- neous” and the element is blocked, the time accumulator is cleared immediately. Figure 5–73: NEGATIVE SEQUENCE TOC1 SCHEME LOGIC GE Multilin C70 Capacitor Bank Protection and Control System 5-181...
  • Page 306 The operating quantity depends on the way the test currents are injected into the relay (single-phase injection: ⋅ 0.2917 I ; three-phase injection, opposite rotation: injected injected Figure 5–74: NEGATIVE SEQUENCE IOC1 SCHEME LOGIC 5-182 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 307 The positive-sequence restraint allows for more sensitive settings by counterbalancing spurious negative-sequence and zero-sequence currents resulting from: • System unbalances under heavy load conditions. • Transformation errors of current transformers (CTs). • Fault inception and switch-off transients. GE Multilin C70 Capacitor Bank Protection and Control System 5-183...
  • Page 308 CT errors, since the current is low. The operating quantity depends on the way the test currents are injected into the C70. For single phase injection: = ⅓ × (1 – K) × I •...
  • Page 309 The element characteristic angle in the reverse direction is the angle set for the forward direction shifted by 180°. • NEG SEQ DIR OC1 FWD LIMIT ANGLE: This setting defines a symmetrical (in both directions from the ECA) limit angle for the forward direction. GE Multilin C70 Capacitor Bank Protection and Control System 5-185...
  • Page 310 NEG SEQ DIR OC1 TYPE selecting this setting it must be kept in mind that the design uses a positive-sequence restraint technique. Figure 5–76: NEGATIVE SEQUENCE DIRECTIONAL OC1 SCHEME LOGIC 5-186 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 311: Voltage Elements

     DIFFERENTIAL 2  VOLTAGE MESSAGE See page 5–194.  DIFFERENTIAL 3  BANK MESSAGE See page 5–197.  OVERVOLTAGE  NEUTRAL VOLTAGE MESSAGE See page 5–201.  UNBALANCE 1 GE Multilin C70 Capacitor Bank Protection and Control System 5-187...
  • Page 312 V = secondary voltage applied to the relay = pickup level pickup % of voltage pickup 842788A1.CDR Figure 5–77: INVERSE TIME UNDERVOLTAGE CURVES At 0% of pickup, the operating time equals the UNDERVOLTAGE DELAY setting. NOTE 5-188 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 313 The minimum voltage setting selects the operating voltage below which the element is blocked (a setting of “0” will allow a dead source to be considered a fault condition). Figure 5–78: PHASE UNDERVOLTAGE1 SCHEME LOGIC GE Multilin C70 Capacitor Bank Protection and Control System 5-189...
  • Page 314 PHASE OV1 PKP 827066A7.CDR Figure 5–79: PHASE OVERVOLTAGE SCHEME LOGIC > × If the source VT is wye-connected, then the phase overvoltage pickup condition is Pickup for V and V NOTE 5-190 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 315 NEUTRAL OV1 CURVE VT errors and normal voltage unbalance must be considered when setting this element. This function requires the VTs to be wye-connected. Figure 5–80: NEUTRAL OVERVOLTAGE1 SCHEME LOGIC GE Multilin C70 Capacitor Bank Protection and Control System 5-191...
  • Page 316 The negative-sequence overvoltage element may be used to detect loss of one or two phases of the source, a reversed phase sequence of voltage, or a non-symmetrical system voltage condition. Figure 5–81: NEGATIVE-SEQUENCE OVERVOLTAGE SCHEME LOGIC 5-192 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 317 AUX OV1 EVENTS: MESSAGE Disabled The C70 contains one auxiliary overvoltage element for each VT bank. This element is intended for monitoring overvoltage conditions of the auxiliary voltage. The nominal secondary voltage of the auxiliary voltage channel entered under SYSTEM ...
  • Page 318 Range: 0.00 to 600.00 s in steps of 0.01 VOLTAGE DIF 1 STG 1 MESSAGE PKP DELAY: 30.00 s Range: 0.00 to 600.00 s in steps of 0.01 VOLTAGE DIF 1 STG 2 MESSAGE PKP DELAY: 10.00 s 5-194 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 319 The function works with grounded and ungrounded banks. In the latter case, the neutral point voltage must be measured by the relay. For additional information, refer to the Theory of Operation and Application of Settings chapters. The following settings are available for each voltage differential element. GE Multilin C70 Capacitor Bank Protection and Control System 5-195...
  • Page 320 The VT fuse fail condition from both the bus and tap VT should also be considered. Note that when unblocked, the function becomes operational after five cycles of intentional delay. 5-196 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 321 Range: 1.00 to 10.00 in steps of 0.01 BANK OV 1 CURVE TIME MESSAGE MULTIPLIER: 1.00 Range: 0.800 to 2.000 pu in steps of 0.001 BANK OV 1 STG 1A MESSAGE PICKUP: 1.050 pu GE Multilin C70 Capacitor Bank Protection and Control System 5-197...
  • Page 322 5-198 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 323 Vop_C = VC – VX Vop_C = (VBC – VCA) / 3 Delta Vop_A = (VCA – VAB) / 3 Vop_B = (VAB – VBC) / 3 Vop_C = (VBC – VCA) / 3 GE Multilin C70 Capacitor Bank Protection and Control System 5-199...
  • Page 324 • BANK OV 1 BLK: This input is used to block the function when required; in particular, when the bank is offline. 5-200 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 325 Range: 0.0 to 10.0% in steps of 0.1 NTRL VOL UNBAL 1 MESSAGE STG 1 SLOPE: 0.0% Range: 0.001 to 1.000 pu in steps of 0.001 NTRL VOL UNBAL 1 MESSAGE STG 2 PKP: 0.020 pu GE Multilin C70 Capacitor Bank Protection and Control System 5-201...
  • Page 326 The slope of the operating characteristic is user adjustable, and if desired, it can be effectively removed yielding a straight compensated overvoltage function. For additional information, see the Theory of operation and Application of settings chapters. 5-202 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 327 The value of resistor R should be chosen so the voltage measured by the auxiliary input of the relay matches bus V0 during system faults (for example, an SLG fault at the bus). This is accomplished by the following condition: GE Multilin C70 Capacitor Bank Protection and Control System 5-203...
  • Page 328 The function becomes blocked if all four blocking inputs are asserted. The individual blocking inputs inhibit the associated stages of the func- tion. 5-204 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 329 NTRL VOLT 1 STG4 OP t DPO FLEXLOGIC OPERANDS FLEXLOGIC OPERANDS NTRL VOLT 1 PKP NTRL VOLT 1 OP NTRL VOLT 1 DPO 834741A1.DWG Figure 5–88: NEUTRAL VOLTAGE UNBALANCE LOGIC GE Multilin C70 Capacitor Bank Protection and Control System 5-205...
  • Page 330: Control Elements

    If more than one operate-type operand is required, it may be assigned directly from the trip bus menu. 5-206 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 331 As such, a reset command the front panel interface or via RESET OP communications will reset the trip bus output. GE Multilin C70 Capacitor Bank Protection and Control System 5-207...
  • Page 332: Setting Groups

    MESSAGE Range: up to 16 alphanumeric characters GROUP 2 NAME: MESSAGE ↓ Range: up to 16 alphanumeric characters GROUP 6 NAME: MESSAGE Range: Disabled, Enabled SETTING GROUP MESSAGE EVENTS: Disabled 5-208 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 333 The assigned operand is used to control the “On” state of a particular settings group. VIRTUAL OUTPUT 1 GE Multilin C70 Capacitor Bank Protection and Control System 5-209...
  • Page 334: Selector Switch

    SELECTOR 1 3BIT ACK: MESSAGE Range: Restore, Synchronize, Sync/Restore SELECTOR 1 POWER-UP MESSAGE MODE: Restore Range: Self-reset, Latched, Disabled SELECTOR 1 TARGETS: MESSAGE Self-reset Range: Disabled, Enabled SELECTOR 1 EVENTS: MESSAGE Disabled 5-210 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 335 SELECTOR 1 3BIT A0, A1, and A2: These settings specify a three-bit control input of the selector. The three-bit con- trol word pre-selects the position using the following encoding convention: POSITION rest GE Multilin C70 Capacitor Bank Protection and Control System 5-211...
  • Page 336 The selector position pre-selected via the stepping up control input has not been confirmed before the time out. SELECTOR 1 BIT ALARM The selector position pre-selected via the three-bit control input has not been confirmed before the time out. 5-212 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 337 POS 1 POS 2 POS 3 POS 4 POS 5 POS 6 POS 7 BIT 0 BIT 1 BIT 2 STP ALARM BIT ALARM ALARM 842737A1.CDR Figure 5–92: TIME-OUT MODE GE Multilin C70 Capacitor Bank Protection and Control System 5-213...
  • Page 338 Make the following changes to selector switch element in the    SETTINGS CONTROL ELEMENTS SELECTOR SWITCH menu to assign control to user programmable pushbutton 1 and contact inputs 1 through 3: SELECTOR SWITCH 1 5-214 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 339 SELECTOR 1 BIT ALARM 3-bit position out SELECTOR 1 ALARM SELECTOR 1 PWR ALARM SELECTOR 1 BIT 0 SELECTOR 1 BIT 1 SELECTOR 1 BIT 2 842012A2.CDR Figure 5–94: SELECTOR SWITCH LOGIC GE Multilin C70 Capacitor Bank Protection and Control System 5-215...
  • Page 340: Time Of Day Timers

    The time of day timer function provides the ability to program control actions based on real time. There are five identical time of day timers, each with an independent start and stop time setting. Each timer is on when the C70 real-time clock/cal- endar value is later than its programmed start time, and earlier than its programmed stop time.
  • Page 341: Capacitor Control

    CAP 1 LCL SET MAN: MESSAGE Range: FlexLogic operand CAP 1 TRIP 1: MESSAGE Range: FlexLogic operand CAP 1 TRIP 2: MESSAGE Range: FlexLogic operand CAP 1 TRIP 3: MESSAGE GE Multilin C70 Capacitor Bank Protection and Control System 5-217...
  • Page 342 CAP 1 BKR CLOSE BLK: MESSAGE Range: FlexLogic operand CAP 1 CLS OVERRIDE: MESSAGE Range: Self-reset, Latched, Disabled CAP 1 TARGETS: MESSAGE Disabled Range: Disabled, Enabled CAP 1 EVENTS: MESSAGE Disabled 5-218 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 343 CAP 1 BKR OPEN 52b: Selects a FlexLogic operand that cancels the trip seal-in. Expected to be set to the contact input to which a contact is wired that is closed when the capacitor breaker is open. When both 52a and 52b contacts GE Multilin C70 Capacitor Bank Protection and Control System 5-219...
  • Page 344 CAP 1 CLS OVERRIDE: Selects a FlexLogic operand that overrides all inhibits for the breaker close command and allows the command to be issued from any source as per the logic diagram. CLOSE 5-220 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 345 Off = 0 CAP 1 AUTO CLOSE OFF = 0 SETTINGS CAP 1 CLOSE SEAL-IN DELAY FLEXLOGIC OPERAND CAP 1 BKR CLOSE 834740A1.DWG Figure 5–98: CAPACITOR BANK CONTROL SCHEME LOGIC GE Multilin C70 Capacitor Bank Protection and Control System 5-221...
  • Page 346: Automatic Voltage Regulator

    The automatic voltage regulator element (AVR) is intended to switch a static capacitor bank breaker close and open to reg- ulate either system voltage, load voltage, power factor, or reactive power. The following figure illustrates some possible applications. 5-222 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 347 For the latter preference, set the var open mode to “Minimize No. of Ops” (minimize number of operations) and set the var open level to the negative of the close level. GE Multilin C70 Capacitor Bank Protection and Control System 5-223...
  • Page 348 AVRs facilitates coordination with those AVRs. • AVR 1 VOLT LEVEL TO CLOSE: In the voltage mode, this setting specifies the voltage level at or below which to issue the close command. 5-224 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 349 • AVR 1 BLOCK: This setting specifies a dynamic blocking condition. When blocked the element resets its output flags and internal timers. VT fuse fail is a typical application. GE Multilin C70 Capacitor Bank Protection and Control System 5-225...
  • Page 350 AVR 1 OPEN DPO SETTING see note at right VAR Open Mode Minimize No. of Ops. = 0 Minimize Uptime = 1 834739A2.CDR Figure 5–102: AUTOMATIC VOLTAGE REGULATOR SCHEME LOGIC 5-226 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 351: Digital Elements

    DIGITAL ELEMENT 1 RESET DELAY: Sets the time delay to reset. If a reset delay is not required, set to “0”. • DIGITAL ELEMENT 1 PICKUP LED: This setting enables or disabled the digital element pickup LED. When set to “Disabled”, the operation of the pickup LED is blocked. GE Multilin C70 Capacitor Bank Protection and Control System 5-227...
  • Page 352 In most breaker control circuits, the trip coil is connected in series with a breaker auxiliary contact which is open when the breaker is open (see diagram below). To prevent unwanted alarms in this situation, the trip circuit monitoring logic must include the breaker position. Figure 5–104: TRIP CIRCUIT EXAMPLE 1 5-228 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 353 In this case, it is not required to supervise the monitoring circuit with the breaker position – the setting is BLOCK selected to “Off”. In this case, the settings are as follows (EnerVista UR Setup example shown). Figure 5–105: TRIP CIRCUIT EXAMPLE 2 GE Multilin C70 Capacitor Bank Protection and Control System 5-229...
  • Page 354: Digital Counters

    –2,147,483,648 counts, the counter will rollover to +2,147,483,647. • COUNTER 1 BLOCK: Selects the FlexLogic operand for blocking the counting operation. All counter operands are blocked. 5-230 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 355 COUNTER 1 FROZEN: Off = 0 STORE DATE & TIME Date & Time SETTING COUNT1 FREEZE/RESET: Off = 0 827065A2.VSD SETTING COUNT1 FREEZE/COUNT: Off = 0 Figure 5–106: DIGITAL COUNTER SCHEME LOGIC GE Multilin C70 Capacitor Bank Protection and Control System 5-231...
  • Page 356: Monitoring Elements

      VT FUSE FAILURE 5 MESSAGE See page 5–240.   VT FUSE FAILURE 6 MESSAGE See page 5–240.   THERMAL OVERLOAD MESSAGE See page 5–242.  PROTECTION 5-232 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 357 Voltage difference drop, and Measured flashover current through the breaker. Furthermore, the scheme is applicable for cases where either one or two sets of three-phase voltages are available across the breaker. GE Multilin C70 Capacitor Bank Protection and Control System 5-233...
  • Page 358 This application does not require detection of breaker status via a 52a contact, as it uses a voltage difference larger than setting. However, monitoring the breaker contact will ensure scheme stability. BRK 1 FLSHOVR DIFF V PKP 5-234 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 359 Depending on the flashover protection application, the flashover current can vary from levels of the charging current when the line is de-energized (all line breakers open), to well above the maximum line (feeder) load (line/feeder con- nected to load). GE Multilin C70 Capacitor Bank Protection and Control System 5-235...
  • Page 360 A six-cycle time delay applies after the selected FlexLogic operand resets. • BRK FLSHOVR PKP DELAY: This setting specifies the time delay to operate after a pickup condition is detected. 5-236 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 361 5 SETTINGS 5.7 CONTROL ELEMENTS Figure 5–107: BREAKER FLASHOVER SCHEME LOGIC GE Multilin C70 Capacitor Bank Protection and Control System 5-237...
  • Page 362 MESSAGE EVENTS: Disabled One breaker restrike element is provided for each CT bank in the C70. According to IEEE standard C37.100: IEEE Standard Definitions for Power Switchgear, restrike is defined as “a resumption of current between the contacts of a switching device during an opening operation after an interval of zero current of ¼...
  • Page 363 BREAKER RESTRIKE 1 RESET DELAY: This setting specifies the reset delay for this element. When set to “0 ms”, then FlexLogic operand will be picked up for only 1/8th of the power cycle. GE Multilin C70 Capacitor Bank Protection and Control System 5-239...
  • Page 364 B failures is when positive sequence current is present and there is an insignificant amount of positive sequence voltage. Also rapid decrease in the phase voltages magnitude from a healthy 5-240 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 365 Figure 5–111: VT FUSE FAIL SCHEME LOGIC Base voltage for this element is PHASE VT SECONDARY setting in the case of WYE VTs and (PHASE VT SECONDARY)/ in case of DELTA VTs. GE Multilin C70 Capacitor Bank Protection and Control System 5-241...
  • Page 366 = measured load RMS current before overload occurs • k= IEC 255-8 k-factor applied to I , defining maximum permissible current above nominal current • = protected element base (nominal) current 5-242 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 367 When current is greater than the pickup level, I > k × I , element starts increasing the thermal energy: t Δ -------------- - (EQ 5.24) – op In GE Multilin C70 Capacitor Bank Protection and Control System 5-243...
  • Page 368 60 minutes 20 minutes Underground cable 20 to 60 minutes 60 minutes The logic for the thermal overload protection element is shown below. Figure 5–113: THERMAL OVERLOAD PROTECTION SCHEME LOGIC 5-244 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 369: Inputs And Outputs

    The DC input voltage is compared to a user-settable threshold. A new contact input state must be maintained for a user- settable debounce time in order for the C70 to validate the new contact state. In the figure below, the debounce time is set at 2.5 ms;...
  • Page 370 "Breaker Closed (52b)" CONTACT INPUT H5A ID: "Enabled" CONTACT INPUT H5A EVENTS: Note that the 52b contact is closed when the breaker is open and open when the breaker is closed. 5-246 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 371: Virtual Inputs

    FlexLogic equation, it will likely have to be lengthened NOTE in time. A FlexLogic timer with a delayed reset can perform this function. Figure 5–115: VIRTUAL INPUTS SCHEME LOGIC GE Multilin C70 Capacitor Bank Protection and Control System 5-247...
  • Page 372: Contact Outputs

    INPUTS/OUTPUTS CONTACT OUTPUTS CONTACT OUTPUT H1a Range: Up to 12 alphanumeric characters  CONTACT OUTPUT H1a OUTPUT H1a ID  L-Cont Op 1 Range: FlexLogic operand OUTPUT H1a OPERATE: MESSAGE 5-248 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 373 USER-PROGRAMMABLE PUSHBUT-  menus: TONS USER PUSHBUTTON 1 USER PUSHBUTTON 2 “Self-reset” “Self-reset” PUSHBUTTON 1 FUNCTION: PUSHBUTTON 2 FUNCTION: “0.00 s” “0.00 s” PUSHBTN 1 DROP-OUT TIME: PUSHBTN 2 DROP-OUT TIME: GE Multilin C70 Capacitor Bank Protection and Control System 5-249...
  • Page 374 Write the following FlexLogic equation (EnerVista UR Setup example shown): Program the Latching Outputs by making the following changes in the   SETTINGS INPUTS/OUTPUTS CONTACT OUT-  menu (assuming an H4L module): PUTS CONTACT OUTPUT H1a 5-250 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 375: Virtual Outputs

    32 “DNA” bit pairs that represent the state of two pre-defined events and 30 user-defined events. All remaining bit pairs are “UserSt” bit pairs, which are status bits representing user-definable events. The C70 implementation provides 32 of the 96 available UserSt bit pairs.
  • Page 376 5 SETTINGS b) LOCAL DEVICES: ID OF DEVICE FOR TRANSMITTING GSSE MESSAGES In a C70 relay, the device ID that represents the IEC 61850 GOOSE application ID (GoID) name string sent as part of each GOOSE message is programmed in the ...
  • Page 377: Remote Inputs

    This setting identifies the Ethernet application identification in the GOOSE message. It should match the corre- sponding settings on the sending device. setting provides for the choice of the C70 fixed (DNA/UserSt) dataset (that is, containing REMOTE DEVICE 1 DATASET DNA and UserSt bit pairs), or one of the configurable datasets.
  • Page 378: Remote Double-Point Status Inputs

    REMOTE OUTPUTS DNA BIT PAIRS REMOTE OUTPUTS DNA- 1(32) BIT PAIR Range: FlexLogic operand  REMOTE OUTPUTS DNA- 1 OPERAND:  DNA- 1 BIT PAIR Range: Disabled, Enabled DNA- 1 EVENTS: MESSAGE Disabled 5-254 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 379: Resetting

    Each of these three operands generates an event in the event record when AND) activated. The setting shown above selects the operand that activates the operand. RESET OP (OPERAND) GE Multilin C70 Capacitor Bank Protection and Control System 5-255...
  • Page 380: Direct Inputs And Outputs

    APPLICATION EXAMPLES The examples introduced in the earlier Direct Inputs and Outputs section (part of the Product Setup section) are continued below to illustrate usage of the direct inputs and outputs. 5-256 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 381 5 SETTINGS 5.8 INPUTS AND OUTPUTS Example 1: Extending input/output capabilities of a C70 relay Consider an application that requires additional quantities of contact inputs or output contacts or lines of programmable logic that exceed the capabilities of a single UR-series chassis. The problem is solved by adding an extra UR-series IED, such as the C30, to satisfy the additional inputs/outputs and programmable logic requirements.
  • Page 382 DIRECT INPUT 6 BIT NUMBER: UR IED 2: "1" DIRECT INPUT 5 DEVICE ID: "2" DIRECT INPUT 5 BIT NUMBER: "3" DIRECT INPUT 6 DEVICE ID: "2" DIRECT INPUT 6 BIT NUMBER: 5-258 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 383: Iec 61850 Goose Analogs

    The following text must be used in the UNITS setting, to represent these types of analogs: A, V, W, var, VA, Hz, deg, and no text (blank setting) for power factor. GE Multilin C70 Capacitor Bank Protection and Control System 5-259...
  • Page 384: Iec 61850 Goose Integers

    GOOSE ANALOG 1 PU: This setting specifies the per-unit base factor when using the GOOSE analog input FlexAna- log values in other C70 features, such as FlexElements. The base factor is applied to the GOOSE analog input Flex- Analog quantity to normalize it to a per-unit quantity. The base units are described in the following table.
  • Page 385: Transducer Inputs And Outputs

    –20 to +180 MW; in this case the value would be “–20” and the DCMA INPUT F1 MIN VALUE DCMA INPUT F1 MAX value “180”. Intermediate values between the min and max values are scaled linearly. VALUE GE Multilin C70 Capacitor Bank Protection and Control System 5-261...
  • Page 386: Rtd Inputs

    1.5 pu. FlexElement operands are available to FlexLogic for further interlocking or to operate an output contact directly. Refer to the following table for reference temperature values for each RTD type. 5-262 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 387 233.97 16.00 172.46 291.96 243.30 16.39 175.84 303.46 252.88 16.78 179.51 315.31 262.76 17.17 183.17 327.54 272.94 17.56 186.82 340.14 283.45 17.95 190.45 353.14 294.28 18.34 194.08 366.53 305.44 18.73 GE Multilin C70 Capacitor Bank Protection and Control System 5-263...
  • Page 388: Dcma Outputs

    MAX VAL MIN VAL MAX VAL < 0.1 pu. The resulting characteristic is illustrated in the following figure. DRIVING SIGNAL MIN VAL MAX VAL 842739A1.CDR Figure 5–123: DCMA OUTPUT CHARACTERISTIC 5-264 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 389 The CT ratio is 5000:5 and the maximum load current is 4200 A. The current should be monitored from 0 A upwards, allow- ing for 50% overload. The phase current with the 50% overload margin is: GE Multilin C70 Capacitor Bank Protection and Control System 5-265...
  • Page 390 – • ±0.5% of reading For example, under nominal conditions, the positive-sequence reads 230.94 kV and the worst-case error is 0.005 x 230.94 kV + 1.27 kV = 2.42 kV. 5-266 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 391: Testing

    TEST MODE FORCING: MESSAGE The C70 provides a test facility to verify the functionality of contact inputs and outputs, some communication functions and the phasor measurement unit (where applicable), using simulated conditions. The test mode is indicated on the relay face- plate by a Test Mode LED indicator.
  • Page 392: Force Contact Inputs

    Following a restart, power up, settings TEST MODE FUNCTION upload, or firmware upgrade, the test mode will remain at the last programmed value. This allows a C70 that has been placed in isolated mode to remain isolated during testing and maintenance activities. On restart, the TEST MODE FORCING setting and the force contact input and force contact output settings all revert to their default states.
  • Page 393: Force Contact Outputs

    1 to initiate the Test mode, make the following changes in the menu:   SETTINGS TESTING TEST MODE “Enabled” and “ ” TEST MODE FUNCTION: TEST MODE INITIATE: GE Multilin C70 Capacitor Bank Protection and Control System 5-269...
  • Page 394 5.10 TESTING 5 SETTINGS 5-270 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 395: Actual Values

     GOOSE UINTEGERS  COMM STATUS See page 6-9.  REMAINING CONNECT  PRP See page 6–10.   ACTUAL VALUES  SOURCE SRC 1 See page 6-14.  METERING  GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 396 See page 6-22.   DATA LOGGER See page 6-23.   ACTUAL VALUES  MODEL INFORMATION See page 6-24.  PRODUCT INFO   FIRMWARE REVISIONS See page 6-24.  C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 397: Contact Inputs

    The state displayed will be that of the remote point unless the remote device has been established to be “Offline” in which case the value shown is the programmed default state for the remote input. GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 398: Remote Double-Point Status Inputs

    For example, ‘Virt Op 1’ refers to the virtual output in terms of the default name-array index. The second line of the display indicates the logic state of the virtual output, as calculated by the FlexLogic equation for that output. C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 399: Remote Devices

    (the count units label will also appear). Also included, is the date and time stamp for the frozen count. The value refers to the microsecond portion of the time stamp. COUNTER 1 MICROS GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 400: Selector Switches

    STATUS ETHERNET Range: Fail, OK  ETHERNET ETHERNET PRI LINK  STATUS: Fail Range: Fail, OK ETHERNET SEC LINK MESSAGE STATUS: Fail Range: Fail, OK ETHERNET TRD LINK MESSAGE STATUS: Fail C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 401: Real Time Clock Synchronizing

    PTP-— IRIG-B DELTA being received via PTP and that being received via IRIG-B. A positive value indicates that PTP time is fast compared to IRIG-B time. GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 402: Direct Inputs

    Range: Offline, Online DIRECT DEVICE 2 MESSAGE STATUS: Offline ↓ Range: Offline, Online DIRECT DEVICE 16 MESSAGE STATUS: Offline These actual values represent the state of direct devices 1 through 16. C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 403: Iec 61850 Goose Integers

    UINT INPUT 16 MESSAGE The C70 Capacitor Bank Protection and Control System is provided with optional IEC 61850 communica- tions capability. This feature is specified as a software option at the time of ordering. See the Order Codes section in chapter 2 for details.
  • Page 404: Parallel Redundancy Protocol (Prp)

    Mismatches Port B: MESSAGE The C70 Capacitor Bank Protection and Control System is provided with optional PRP capability. This fea- ture is specified as a software option at the time of ordering. See the Order Codes section in chapter 2 for details.
  • Page 405: Metering Conventions

    WATTS = Negative VARS = Positive PF = Lead PF = Lag PF = Lead Current UR RELAY 827239AC.CDR S=VI Generator Figure 6–1: FLOW DIRECTION OF SIGNED VALUES FOR WATTS AND VARS GE Multilin C70 Capacitor Bank Protection and Control System 6-11...
  • Page 406 • ACB phase rotation: -- - V -- - V -- - V -- - V -- - V -- - V The above equations apply to currents as well. 6-12 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 407 The power system voltages are phase-referenced – for simplicity – to VAG and VAB, respectively. This, however, is a relative matter. It is important to remember that the C70 displays are always referenced as specified under SETTINGS ...
  • Page 408: Sources

    MESSAGE 0.000 SRC 1 PHASOR Ia: MESSAGE 0.000 0.0° SRC 1 PHASOR Ib: MESSAGE 0.000 0.0° SRC 1 PHASOR Ic: MESSAGE 0.000 0.0° SRC 1 PHASOR In: MESSAGE 0.000 0.0° 6-14 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 409 RMS Vab: MESSAGE 0.00 SRC 1 RMS Vbc: MESSAGE 0.00 SRC 1 RMS Vca: MESSAGE 0.00 SRC 1 PHASOR Vab: MESSAGE 0.000 0.0° SRC 1 PHASOR Vbc: MESSAGE 0.000 0.0° GE Multilin C70 Capacitor Bank Protection and Control System 6-15...
  • Page 410 φb: 0.000 SRC 1 REACTIVE PWR MESSAGE φc: 0.000 SRC 1 APPARENT PWR MESSAGE 3φ: 0.000 SRC 1 APPARENT PWR MESSAGE φa: 0.000 SRC 1 APPARENT PWR MESSAGE φb: 0.000 6-16 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 411 S = V x Î x Î x Î (EQ 6.1) When VTs are configured in delta, the C70 does not calculate power in each phase and three-phase power is measured as S = V x Î x Î (EQ 6.2)
  • Page 412 The harmonics are a percentage of the fundamental signal obtained as a ratio of harmonic amplitude to fundamental ampli- tude multiplied by 100%. The total harmonic distortion (THD) is the ratio of the total harmonic content to the fundamental: … (EQ 6.4) 6-18 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 413: Capacitor Control

    NEUTRAL VOLTAGE UNBALANCE     PATH: ACTUAL VALUES METERING CAPACITOR BANK NEUTRAL VOLTAGE... NEUTRAL VOLTAGE UNBALANCE 1(3)  NEUTRAL VOLTAGE NEUTRAL-POINT Vx:  UNBALANCE 1 0.0000 pu / 0.0° GE Multilin C70 Capacitor Bank Protection and Control System 6-19...
  • Page 414: Tracking Frequency

    DCMA INPUT MAX under the +IN and –IN inputs. FREQUENCY = 1 Hz BASE ϕ PHASE ANGLE = 360 degrees (see the UR angle referencing convention) BASE 6-20 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 415: Iec 61580 Goose Analog Values

    MESSAGE 0.000 The C70 Capacitor Bank Protection and Control System is provided with optional IEC 61850 communica- tions capability. This feature is specified as a software option at the time of ordering. See the Order Codes section of chapter 2 for details.
  • Page 416: Records

    This menu allows the user to view the number of triggers involved and number of oscillography traces available. The value is calculated to account for the fixed amount of data storage for oscillography. See the Oscillog- CYCLES PER RECORD raphy section of chapter 5 for additional details. 6-22 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 417: Data Logger

    It counts up at the defined sampling rate. If the data logger channels are defined, then both values are static. Refer to the  menu for clearing data logger records. COMMANDS CLEAR RECORDS GE Multilin C70 Capacitor Bank Protection and Control System 6-23...
  • Page 418: Product Information

    Date and time when the boot program was built. 2012/09/15 16:41:32 The shown data is illustrative only. A modification file number of 0 indicates that, currently, no modifications have been installed. 6-24 C70 Capacitor Bank Protection and Control System GE Multilin...
  • Page 419: Commands And

    If applied from this command level, a given value is placed into the setting file and applied instanta- neously in all setting groups of the relay with the same source as the active group during the auto-setting procedure. GE Multilin C70 Capacitor Bank Protection and Control System...
  • Page 420 “Auto” to “Disabled” and 87V becomes operational. In essence, when in the “Auto” mode, the user confirmation is processed immediately after the balancing values become available. The C70 does not display the applied coefficients in “Auto” mode; rather, they are be viewed under in the menu.
  • Page 421 After the process if finished, it is recommended to disable the auto-setting feature. If not manually disabled, the feature automatically disables itself when user-initiated front panel interface activity ceases and the C70 display is dimmed. Certain security conditions are checked during the auto-setting process, such as the frequency deviation from the nominal frequency and the magnitude of the positive-sequence current above 0.1 pu.