Operator`s manual

Appendix D: Acceptance Test Procedures
74 Siemens Energy & Automation, Inc.
ISGS Acceptance Test
Directional Phase Time Overcurrent (67) Function
(Phase-Phase Connected VTs)
Set the ISGS as follows:
Parameter Set A 7103
5000:5 Current Transformer (CT) 1101
Curve SEA 5, Very Inverse 1902
1 A Nominal Pickup 1903
Time Dial per Chart 1905
Impedance to 45° 1907
Direction to Reverse 1908
Trip Matrixed to Trip 1 Contact 6401
Enable 67 1901
Disable Other Conflicting Functions 1501, 1551, 1601, 1651, 1801, 1901, 2001, 2301
Raise 51 Pickup To Maximum 1703
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.
2. Connect suitable variable source current
to phase A, terminals 3 and 4,
to phase B, terminals 5 and 6,
to phase C, terminals 7 and 8,
to neutral, terminals 9 and 10,
3. Connect suitable AC voltage
to phase A-B, terminals 41 and 42,
to phase B-C, terminals 43 and 44,
to phase C-A, terminals 45 and 46,
Connect timer to Trip 1 contacts, terminals 1 and 2.
Pickup
4. Apply nominal voltage to the relays voltage inputs,
for example, 69 V
∠ 30 to phase A-B,
69 V
∠ 270 to phase B-C,
69 V
∠ 150 to phase C-A.
Apply 2x pickup current to phase A and B in forward direction,
for example, 2.0 A
∠ 30 to phase A and 2.0 A ∠ 210 to phase B, or
2.0 A
∠ 270 to phase B and 2.0 A ∠ 90 to phase C, or
2.0 A
∠150 to phase C and 2.0 A ∠ 330 to phase A.
-relay should not go into pickup,
-reset test current to zero A,
D
isv3o_1.bk : isv3otst.frm Page 74 Wednesday, August 7, 1996 10:51 AM