9-12
G650 Generator Protection & Control System
GEK-113285A
9.10 INSTANTANEOUS OVERCURRENT (50PH, 50N, 50G Y 50SG)
9 COMMISSIONING
9
9.10INSTANTANEOUS OVERCURRENT (50PH, 50N, 50G Y 50SG)
Set the relay to trip for the protection element being tested. Configure any of the outputs to be enabled only by the
protection element being tested.
Apply 0.9 times the Pickup current and check that the relay does not trip.
Gradually increase the current value and verify that the relay operates between 1 and 1.1 times the set pickup current. The
relay must trip by instantaneous in a time frame of 10 to 55 ms. All the relay trip contacts must operate, as well as the
contact set as 50.
Remove current and apply it again suddenly to a value of 4 times the pickup current. The relay should trip instantaneously
in a time frame of 10 to 45 ms.
Test one point for each phase and group of the protection element.
Note (*): Only available for Enhanced models
50 ELEMENTS TEST PARAMETERS
Element Settings (50PH, 50G y 50SG)
Setting
Value
Units
Function
Enabled
Input
RMS
NA
Pickup Level
3
A
Delay time
0
Seconds
Test Execution
Configure one output for 50 Trip
Apply times I pickup
Element Trip
Tripping times (ms)
0.9 x Pickup
NO
NA
1.1 x Pickup
YES
10-55
4 x Pickup
YES
10-45
Elements
Phase
Group
50PH IA
0
IB
0
IC
0
50G
IG
0
50SG
(*)
ISG
0
Summary of Contents for Multilin G650
Page 9: ...8 G650 Generator Protection Control System GEK 113285A TABLE OF CONTENTS ...
Page 426: ...GEK 113285A G650 Generator Protection Control System A 31 APPENDIX A A 1 LOGIC OPERANDS A ...
Page 427: ...A 32 G650 Generator Protection Control System GEK 113285A A 1 LOGIC OPERANDS APPENDIXA A ...
Page 587: ...C 22 G650 Generator Protection Control System GEK 113285A C 8 ANALOG INPUTS APPENDIXC C ...
Page 639: ...G 2 G650 Generator Protection Control System GEK 113285A G 1 GE MULTILIN WARRANTY APPENDIXG G ...