GE DGP Series, Instruction Manual

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DGP Digital Generator Protection System GE Power Management
4.7 PROTECTION TESTS 4 ACCEPTANCE TESTS
4
4.7.8 T11: ANTI-MOTORING 32-2
Skip this test if your DGP model does not include this function. This function is not available
on DGP***ABA model relays.
1. Settings:
32-2
(903) REV PWR = 1.5 (0.3)
(904) TL2 = 1
DIG INP
(2501) SELBKDI1 = NO BLK (0)
2. Connect relay as shown in Figure 4–8: STANDARD FUNCTIONAL TEST CONNECTIONS on page 4–26.
3. Set up relay in test mode for the 32-2 function; 32-2 ON will be displayed on the MMI.
4. Using a 60 Hz source set the voltage inputs to:
VA = 20 V rms
∠
0°,
VB = 20V rms
∠
–120°,
VC = 20V rms
∠
–240°.
5. Set the current input to IA = 0.1 (0.02) A rms
∠
180°. Phases B and C should have no current.
6. Verify that test pickup operates immediately and test trip operates in 1.00 to 1.05 seconds.
4.7.9 T12: TIME OVERCURRENT WITH VOLTAGE RESTRAINT 51V
1. Settings:
51V
(1003) PICKUP = 0.5 (0.1)
(1004) TIME FAC = 1.0
2. Connect relay as shown in Figure 4–8: STANDARD FUNCTIONAL TEST CONNECTIONS on page 4–26.
3. Set up relay in test mode for the 51V function; 51V ON will be displayed on the MMI.
4. Using a 60 Hz source set the voltage inputs to:
VA = 70V rms
∠
0°
VB = 70V rms
∠
–120°
VC = 70V rms
∠
–240°.
Set the current inputs according to the table below.
Table 4–3: CURRENT INPUTS FOR TEST T12
TEST PHASE A PHASE B PHASE C
MAG. PHASE MAG. PHASE MAG. PHASE
A 0.45 (0.09) A 0° 0.45 (0.09) A –120° 0.45 (0.09) A –240°
B 2.0 (0.4) A 0° 2.0 (0.4) A –120° 2.0 (0.4) A –240°
NOTE