Instantaneous Overcurrent (50Ph, 50N, 50G Y 50Sg) - GE Multilin G650 Manual

9.10 INSTANTANEOUS OVERCURRENT (50PH, 50N, 50G Y 50SG)

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
9
9-12
50 ELEMENTS TEST PARAMETERS
Element Settings (50PH, 50G y 50SG)
Setting
Function
Input
Pickup Level
Delay time
Test Execution
Configure one output for 50 Trip
Apply times I pickup
0.9 x Pickup
1.1 x Pickup
4 x Pickup
Elements
50PH
50G
(*)
50SG
G650 Generator Protection & Control System
Value Units
Enabled
RMS NA
3 A
0 Seconds
Element Trip
NO
YES
YES
Phase
IA
IB
IC
IG
ISG
9 COMMISSIONING
Tripping times (ms)
NA
10-55
10-45
Group
0
0
0
0
0
GEK-113285A