GE DGP Series Instruction Manual page 139

4 ACCEPTANCE TESTS
1. Make the following Settings changes:
81-1O
(2103) SET PNT = 60
(2104) TL15 = 2
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 81-1O function; 81-1O ON will be displayed on the MMI.
4. Set all current inputs to 0. Using a 59 Hz source set the voltage inputs to:
VA = 70 V rms ∠0°,
VB = 70 V rms ∠–120°,
VC = 70 V rms ∠–240°.
5. Verify that the test pickup and test trip do not operate.
6. Change the frequency of the voltage inputs to 61 Hz.
7. Verify test pickup operates immediately and test trip operates in 2.0 to 2.1 seconds.
1. Make the following Settings changes:
81-2O
(2203) SET PNT = 60
(2204) TL16 = 2
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 81-2O function; 81-2O ON will be displayed on the MMI.
4. Set all current inputs to 0. Using a 59 Hz source set the voltage inputs to:
VA = 70 V rms ∠0°,
VB = 70 V rms ∠–120°,
VC = 70 V rms ∠–240°.
5. Verify that the test pickup and test trip do not operate.
6. Change the frequency of the voltage inputs to 61 Hz.
7. Verify test pickup operates immediately and test trip operates in 2.0 to 2.1 seconds.
GE Power Management DGP Digital Generator Protection System
4.7 PROTECTION TESTS
4.7.20 T23: OVERFREQUENCY UNIT #1 81-1O
4.7.21 T24: OVERFREQUENCY UNIT #2 81-2O
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