Mig And Mig Ii Relays - GE Multilin 3 Series Manual

CHAPTER 1: OVERVIEW
MIG II Generator Protection System
MIG Machine Protection Relay
350 Feeder Protection System, 345 Transformer Protection System, 339 Motor Protection System, 850 Feeder Protection System,
or P40 Agile P14D Relay
1.4.1 MIG and MIG II P to 350 or 345
Note
Feature
Protection & Current Unbalance: 46
Control
Thermal Protection: 49
IOC: 50P, 50G, 51G
TOC: 51P
Undercurrent: 37
66
Restricted Ground
Differential: 87R
3 SERIES RETROFIT – INSTRUCTION MANUAL
1.4

MIG and MIG II relays

Installed Relay
Retrofit Relay
Most MIG and MIG II features are available in 350, 345, or 339 relays as described in the
tables below. In some cases an 8 Series or P40 Agile relay may be required to replace full
functionality. For additional information, refer to the P40 Technical Manual or
850 Instruction Manual.
For the MIG II P being used as a transformer, when 87R is not required, the 350 relay is an
option. When 87R is required, the 345 relay with 87G is an option.
For the MIG II P being used as a generator, the 350 relay is an option.
The 350 Feeder Protection System does not support Restricted Ground Differential 87R. To
replace MIG and MIG II P relays when Restricted Ground Fault protection is required, the
345 relay with 87G can be used. a P40 Agile P14D relay or 850 Feeder Protection System
can also be used.
MIG MIG II P
Current Unbalance: 46
Thermal Protection: 49
IOC: 50N, 50P, 50G
TOC: 51G, 51N, 51P
Restricted Ground
Differential: 87R
1
350
Current unbalance:
51_2 or 46(1), 50_2 (1) or 46(1)
Thermal Protection: 49
IOC: 50P(2), 50G/SG(2), 50N(2),
TOC: 51P(1), 51G/SG(1), 51N(1),
Other Protection: I1/I2(46BC)
MIG AND MIG II RELAYS
2
345
Current unbalance:
51_2 or 46(1), 50_2 (1) or 46(1)
Thermal Protection: 49
IOC: 50P(2), 50G/SG(2), 50N(2),
TOC: 51P(1), 51G/SG(1), 51N(1),
Restricted Ground Fault:
87G/RGF(2)
7