GE Feeder Management Relay 750

iv 750/760 Feeder Management Relay GE Multilin
TABLE OF CONTENTS
7.2.3 CRC-16 Algorithm...............................................................................................7-3
7.2.4 Message Timing .................................................................................................7-3
7.3 MODBUS OPERATIONS
7.3.1 Modbus Function Codes.....................................................................................7-4
7.3.2 Exception Responses .........................................................................................7-7
7.3.3 Clock Synchronization of Multiple Relays...........................................................7-8
7.3.4 Reading the Event Recorder ..............................................................................7-9
7.3.5 Reading Trace Memory ....................................................................................7-10
7.3.6 Reading the Data Logger..................................................................................7-11
7.3.7 Accessing Data via the User Map.....................................................................7-11
7.3.8 Memory Map Organization ...............................................................................7-12
7.4 MODBUS MEMORY MAP
7.4.1 Memory Map.....................................................................................................7-13
7.4.2 Data Formats ....................................................................................................7-40
7.5 DNP COMMUNICATIONS
7.5.1 Device Profile Document ..................................................................................7-49
7.5.2 DNP Implementation.........................................................................................7-51
7.5.3 DNP Point Lists.................................................................................................7-52
8. COMMISSIONING TESTS 8.1 OVERVIEW
8.1.1 Safety Precautions..............................................................................................8-1
8.1.2 Requirements .....................................................................................................8-1
8.1.3 Conventions........................................................................................................8-2
8.1.4 Test Equipment...................................................................................................8-2
8.1.5 Installation Checks..............................................................................................8-2
8.1.6 Wiring Diagrams .................................................................................................8-3
8.2 INPUTS/OUTPUTS
8.2.1 Logic/Virtual Inputs 1 to 14 .................................................................................8-4
8.2.2 Virtual Inputs 15 to 20.........................................................................................8-8
8.2.3 Output Relays.....................................................................................................8-9
8.3 METERING
8.3.1 Current Metering...............................................................................................8-10
8.3.2 Voltage Metering...............................................................................................8-10
8.3.3 Power Metering.................................................................................................8-12
8.3.4 Demand Metering .............................................................................................8-13
8.3.5 Analog Input Metering.......................................................................................8-15
8.4 PROTECTION SCHEMES
8.4.1 Setpoint Groups................................................................................................8-16
8.4.2 Phase Overcurrent............................................................................................8-16
8.4.3 Neutral Overcurrent ..........................................................................................8-20
8.4.4 Ground Overcurrent..........................................................................................8-23
8.4.5 Negative-Sequence Overcurrent and Voltage ..................................................8-24
8.4.6 Voltage..............................................................................................................8-25
8.4.7 Frequency.........................................................................................................8-29
8.4.8 Breaker Failure .................................................................................................8-31
8.4.9 Reverse Power .................................................................................................8-32
8.5 MONITORING
8.5.1 Current Monitoring ............................................................................................8-33
8.5.2 Fault Locator.....................................................................................................8-33
8.5.3 Demand Monitoring ..........................................................................................8-34
8.5.4 Analog Inputs....................................................................................................8-35
8.5.5 Overfrequency Monitoring ................................................................................8-35
8.5.6 Power Factor ....................................................................................................8-36
8.5.7 VT Failure .........................................................................................................8-36
8.5.8 Trip Coil Monitor ...............................................................................................8-37
8.5.9 Close Coil Monitor ............................................................................................8-37
8.5.10 Breaker Operation Failure ................................................................................8-37
8.5.11 Arcing Current...................................................................................................8-38
8.5.12 Analog Output Channels...................................................................................8-38
8.5.13 IRIG-B ...............................................................................................................8-38
8.5.14 Pulse Output .....................................................................................................8-38
Courtesy of NationalSwitchgear.com