| Appendix D: Acceptance Test Procedures |
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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
NConnections
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
Siemens Energy & Automation, Inc. | 65 |
