Siemens ISGS SG8158-00 - Manual (Page 74)

Appendix D: Acceptance Test Procedures
68 Siemens Energy & Automation, Inc.
ISGS Acceptance Test
Undervoltage (27) Function
Set the ISGS as follows:
Parameter Set A
7103
Voltage Primary Rating 120 V 1201
Connection Line to Neutral 1202
Enable Function 2301
Time Characteristic: Inverse Time 2302
Trip on Line to Neutral 2303
Pickup Level 100 V 2304
Time Dial 5.0 2306
Trip Matrixed to Trip 1 Contact 6401
Phase
A B C Connections
1. Connect the appropriate source of control voltage to terminals 13 (+) and 12 (-).
Relay Disabled contact on terminals 19 and 20 opens.
With 27 enabled, pickup LED is illuminated; relay may trip on Undervoltage before VT source is applied.
2. Connect suitable variable voltage source to terminals 41, 43, and 45 with
neutral connected to 42, 44, and 46.
3. Connect timer to Trip 1 contacts on terminals 1 and 2.
Pickup
4. Apply nominal to neutral system voltage.
Pickup LED extinguishes.
Trip LED may be reset.
5. Slowly reduce voltage until relay picks up.
Pickup LED illuminates.
Display shows PICKUP 27 P1 (2, 3).
Wisdom software records pickup in event log.
6. Return voltage to nominal value.
Pickup LED extinguishes.
Wisdom software records end of pickup.
D
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