GE 735

ii 735/737 Feeder Protection Relay
GE Power Management
TABLE OF CONTENTS
3.5.4 SYSTEM CONFIGURATION................................................................... 3-13
3.5.5 STATUS................................................................................................... 3-13
3.5.6 ACTUAL VALUES.................................................................................... 3-14
3.5.7 SETPOINTS............................................................................................. 3-14
3.5.8 COMMANDS............................................................................................ 3-14
3.5.9 FILE ......................................................................................................... 3-15
3.5.10 INFO ........................................................................................................ 3-15
3.5.11 RETURN.................................................................................................. 3-15
3.6 SETUP EXAMPLE
3.6.1 EXAMPLE REQUIREMENTS AND SETTINGS ...................................... 3-16
4. MODBUS
COMMUNICATIONS
4.1 OVERVIEW
4.1.1 DESCRIPTION .......................................................................................... 4-1
4.1.2 ELECTRICAL INTERFACE ....................................................................... 4-1
4.1.3 DATA FRAME FORMAT AND RATE ........................................................ 4-1
4.1.4 DATA PACKET FORMAT.......................................................................... 4-2
4.1.5 TIMING ......................................................................................................4-2
4.1.6 ERROR CHECKING.................................................................................. 4-3
4.2 SUPPORTED MODBUS FUNCTIONS
4.2.1 DESCRIPTION .......................................................................................... 4-4
4.2.2 FUNCTION CODE 03: READ SETPOINTS............................................... 4-4
4.2.3 FUNCTION CODE 04: READ ACTUAL VALUES...................................... 4-5
4.2.4 FUNCTION CODE 05: EXECUTE OPERATION....................................... 4-6
4.2.5 FUNCTION CODE 06: STORE SINGLE SETPOINT ................................ 4-7
4.2.6 FUNCTION CODE 07: READ STATUS..................................................... 4-7
4.2.7 FUNCTION CODE 16: STORE MULTIPLE SETPOINTS.......................... 4-8
4.2.8 ERROR RESPONSES............................................................................... 4-9
4.3 MEMORY MAP
4.3.1 MODBUS MEMORY MAP ....................................................................... 4-10
4.3.2 MEMORY MAP DATA FORMATS........................................................... 4-12
5. OVERCURRENT CURVES
5.1 OVERVIEW
5.1.1 DESCRIPTION .......................................................................................... 5-1
5.2 ANSI CURVES
5.2.1 ANSI MODERATELY INVERSE CURVES................................................ 5-2
5.2.2 ANSI NORMAL INVERSE CURVES ......................................................... 5-4
5.2.3 ANSI VERY INVERSE CURVES............................................................... 5-6
5.2.4 ANSI EXTREMELY INVERSE CURVES................................................... 5-8
5.3 DEFINITE TIME CURVES
5.3.1 DESCRIPTION ........................................................................................ 5-10
5.4 IAC CURVES
5.4.1 IAC SHORT INVERSE CURVES............................................................. 5-12
5.4.2 IAC INVERSE CURVES .......................................................................... 5-14
5.4.3 IAC VERY INVERSE CURVES ............................................................... 5-16
5.4.4 IAC EXTREMELY INVERSE CURVES ................................................... 5-18
5.5 IEC CURVES
5.5.1 IEC SHORT TIME CURVES.................................................................... 5-20
5.5.2 IEC A CURVES........................................................................................ 5-22
5.5.3 IEC B CURVES........................................................................................ 5-24
5.5.4 IEC C CURVES ....................................................................................... 5-26