GE LPS-O - T10: Overvoltage Test

GE Power Management LPS-O Line Protection System 6-
7
6 FUNCTIONAL TESTS (USER SETTINGS) 6.2 MEASURING UNIT TESTS
6
6.2.10 T10 – OVERVOLTAGE TEST
1. Connect the relay as shown in Figure 5–1: PHASE-TO-PHASE TEST CONNECTIONS on page 5–7.
2. Protection settings:
VOLTAGE
(701)
RATEDVOLTS
= [________] V rms
(702)
PHASEOVER
= YES
(703)
PHOVPICKUP
= [________] p.u. V
(704)
PHOVTMDLY
= [________] sec.
3. Set the relay into test mode 31. The LUI displays
OVERVOLTAGE ON
4. Set the voltage inputs to the following values:
VA:
VB:
VC:
5. Set
I
op
to zero Amps.
The overvoltage function is a positive sequence overvoltage detector with adjustable time delay such that:
6. Raise phase A voltage from nominal to
V
op
+ 5 V = [________] V and check that contact A1 closes within
±7% of PHOVTMDLY = [________] seconds. Set phase A voltage back to (RATEDVOLTS / 1.732) =
[________] V and check that contact A1 opens. Repeat for phases B and C.
RATEDVOLTS
1.732
----------------------------------------
V rms 0
°∠
RATEDVOLTS
1.732
----------------------------------------
V rms 120
°
–
∠
RATEDVOLTS
1.732
----------------------------------------
V rms 240
°
–
∠
V
op
RATEDVOLTS
1.732
----------------------------------------


PHOVPICKUP
×
=