Siemens ISGS SG8158-00 - Manual (Page 78)

Appendix D: Acceptance Test Procedures
72 Siemens Energy & Automation, Inc.
ISGS Acceptance Test Directional Phase Time Overcurrent (67) Function
(Phase-Neutral 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,
3. Connect suitable AC voltage
to phase A, terminals 41 and 42,
to phase B, terminals 43 and 44,
to phase C, 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 ∠ 0 to phase A,
69 V ∠ 240 to phase B,
69 V ∠ 120 to phase C.
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,
-increase phase A and phase B current in reverse direction until relay picks up (at 1.06 x pickup)
for example, 1.06 A
∠ 210 to phase A and 1.06 A ∠ 30 to phase B, or
1.06 A ∠ 90 to phase B and 1.06 A ∠ 270 to phase C, or
1.06 A ∠ 330 to phase C and 1.06 A ∠ 150 to phase A.
D
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