4-
34
DGP Digital Generator Protection System
GE Power Management
4.7 PROTECTION TESTS
4 ACCEPTANCE TESTS
4
4.7.18 T21: UNDERFREQUENCY UNIT #3 81-3U
Skip this test if your DGP model does not include this function. This function is not available
on DGP***ABA model relays.
1.
Make the following Settings changes:
81-3U
(1903) SET PNT = 60
(1904) TL10 = 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 81-3U function; 81-3U ON will be displayed on the MMI.
4.
Set all current inputs to 0. Using a 61 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 test pickup and test trip do not operate.
6.
Change the frequency of the voltage inputs to 59 Hz.
7.
Verify that test pickup operates immediately and test trip operates in 2.0 to 2.1 seconds.
4.7.19 T22: UNDERFREQUENCY UNIT #4 81-4U
Skip this test if your DGP model does not include this function. This function is not available
on DGP***ABA model relays.
1.
Make the following Settings changes:
81-4U
(2003) SET PNT = 60
(2004) TL11 = 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 81-4U function; 81-4U ON will be displayed on the MMI.
4.
Set all current inputs to 0. Using a 61 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 test pickup and test trip do not operate.
6.
Change the frequency of the voltage inputs to 59 Hz.
7.
Verify that test pickup operates immediately and test trip operates in 2.0 to 2.1 seconds.
NOTE
NOTE
Содержание DGP Series
Страница 2: ......
Страница 4: ......
Страница 104: ...3 8 DGP Digital Generator Protection System GE Power Management 3 4 INSTALLATION 3 HARDWARE DESCRIPTION 3...
Страница 192: ...8 18 DGP Digital Generator Protection System GE Power Management 8 5 PASSWORDS 8 INTERFACE 8...
Страница 260: ...B 4 DGP Digital Generator Protection System GE Power Management B 1 CHANGE NOTES APPENDIXB B...
Страница 262: ...B 6 DGP Digital Generator Protection System GE Power Management B 1 CHANGE NOTES APPENDIXB B...
Страница 268: ...D 2 DGP Digital Generator Protection System GE Power Management D 1 DGP WARRANTY APPENDIXD D...
Страница 276: ...viii DGP Digital Generator Protection System GE Power Management INDEX INDEX...
Страница 277: ...GE Power Management DGP Digital Generator Protection System NOTES...