Function Key Input Mapping - GE P741 Technical Manual

Programmable Logic
MiCOM P741, P742, P743
Peripheral Unit P743:
Relay
Contact P74x Relay Text
Number
1 Relay Label 01
2 Relay Label 02
3 Relay Label 03
4 Relay Label 04
5 Relay Label 05
6 Relay Label 06
7 Relay Label 07
8 Relay Label 08
9 Relay Label 09
10 Relay Label 10
11 Relay Label 11
12 Relay Label 12
13 Relay Label 13
14 Relay Label 14
15 Relay Label 15
16 Relay Label 16
Note:
A fault record can be generated by connecting one or a number of contacts to the "Fault
Record Trigger" in PSL. It is recommended that the triggering contact be 'self reset' and not
a latching. If a latching contact were chosen the fault record would not be generated until the
contact had fully reset.
1.13

Function key input mapping

The default mappings for each of the function key inputs are as shown in the following table:
Central Unit P741:
LED
Number
1 FnKey 1
2 FnKey 2
3 FnKey 3
4 FnKey 4
5 FnKey 5
6 FnKey 6
7 FnKey 7
8 FnKey 8
9 FnKey 9
10 FnKey 10
P74x Relay
Conditioner
Pick-up 0/0
Pick-up 0/0
Pick-up 0/0
Pick-up 0/0
Pick-up 0/0
Pick-up 0/0
Pick-up 0/0
Pick-up 0/0
Pick-up 0/0
Pick-up 0/0
Pick-up 0/0
Pick-up 0/0
Pick-up 0/0
Pick-up 0/0
Pick-up 0/0
Pick-up 0/0
It is essential that Relay 1, 2 and 3 are used for tripping purposes as
this output is directly driven in the fixed logic to obtain the typical 13ms
tripping time.
Text Setting
Normal
Normal
Normal
Toggled
Toggled
Normal
Normal
Normal
Normal
Not Used
P74x/EN PL/Na7
Function
Trip 87BB or 50BF backtrip (fixed)
Trip 87BB or 50BF backtrip (fixed)
Trip 87BB or 50BF backtrip (fixed)
Circuit Breaker failure
Circuit Breaker failure or out of service
Circuit Breaker failure retrip
Trip or Dead Zone Fault
Circuit Breaker or Isolator status alarm
Circuit Breaker failure retrip phase A
Circuit Breaker failure retrip phase B
Circuit Breaker failure retrip phase C
Not Mapped
Not Mapped
Not Mapped
Not Mapped
Not Mapped
Function
To reset Zone or CZ circuitry fault
To reset Zone or CZ PU error fault
To Disable All protections (CU & PU)
To block in Zone 1: 87BB & 50BF
To block in Zone 2: 87BB & 50BF
To reset CU Indications
To reset CU & PU Indications
To reset PU Trip Latch
To trigger the Manual DR
Not used
(PL) 7-49
PL