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4.7 PROTECTION TESTS
Skip this test if your DGP model does not include this function. This function is not available
on DGP***ABA model relays.
NOTE
1. Settings:
64G2
(1203) TL5 = 0.1
DIG INP
(2501) SELBKDI1 = NO BLK (0)
2. Connect the relay as shown in Figure 4–9: STATOR GROUND TEST CONNECTIONS.
3. Set up relay in test mode for the 64G2 function; 64G2 ON will be displayed on the MMI.
4. Set the following inputs using 60 Hz for phase A and 180 Hz for phases B and C.
Table 4–6: VOLTAGE INPUTS FOR TEST T15
4
TEST
A
B
5. The following results should be obtained:
Test A : Test pickup and test trip do not operate.
Test B : Test pickup operates immediately and test trip operates in 110 to 130 ms.
6. Change the following settings:
(2501) SELBKDI1 = BLK #2 (2)
7. Apply DC voltage across DI1 (BG8—BG7). Repeat test B and verify that the test contacts do not operate.
Remove DC from DI1 (BG8—BG7) and verify that test pickup operates immediately and test trip operates
in 110 to 130 ms.
4-
28
PHASE A (60 Hz)
MAG.
PHASE
100 V
0°
100 V
0°
DGP Digital Generator Protection System
4.7.12 T15: STATOR GROUND ZONE 2 64G2
PHASE B (180 Hz)
MAG.
PHASE
10 V
0°
10 V
0°
4 ACCEPTANCE TESTS
PHASE C (180 Hz)
MAG.
PHASE
1 V
0°
0.5 V
0°
GE Power Management
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