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DGP Digital Generator Protection System
GE Power Management
4.7 PROTECTION TESTS
4 ACCEPTANCE TESTS
4
4.7.12 T15: STATOR GROUND ZONE 2 64G2
Skip this test if your DGP model does not include this function. This function is not available
on DGP***ABA model relays.
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.
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.
Table 4–6: VOLTAGE INPUTS FOR TEST T15
TEST
PHASE A (60 Hz)
PHASE B (180 Hz)
PHASE C (180 Hz)
MAG.
PHASE
MAG.
PHASE
MAG.
PHASE
A
100 V
0°
10 V
0°
1 V
0°
B
100 V
0°
10 V
0°
0.5 V
0°
NOTE
Содержание DGP Series
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