Siemens ISGS SG8158-00 - Manual (Page 71)

Appendix D: Acceptance Test Procedures
Siemens Energy & Automation, Inc. 65
ISGS Acceptance Test Neutral Time Overcurrent (51N) Function
Set the ISGS as follows:
Parameter Set A
7103
5000:5 Current Transformer (CT) 1102
Curve SEA 5, Very Inverse 1802
1 A Nominal Pickup 1803
Time Dial per Chart 1805
Trip Matrixed to Trip 1 Contact 6401
Enable 51N 1801
Disable Other Conflicting Functions 1501, 1551, 1601, 1651, 1901, 2001, 2301
Raise 51 Pickup to Maximum 1703
Phase
N
Connections
1. Connect the appropriate source of control voltage to terminals 13 (+) and 12 (-).
Relay Disabled contact on terminals 19 and 20 opens.
2. Connect suitable variable source current
to neutral, terminals 9 and 10.
3. Connect timer to Trip 1 contacts, terminals 1 and 2.
Pickup
4. Increase current until relay picks up (this should occur at 1.06 A x pickup).
Pickup LED illuminates.
Wisdom software records pickup in event log.
Return current to zero and reset timer.
Timing
5. Apply appropriate value of current for the test. The results match Table D.2.
Pickup LED illuminates.
Display shows PICKUP 51N PN.
Wisdom software records pickup in event log.
D
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