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