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6 FUNCTIONAL TESTS (USER SETTINGS)
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:
RATEDVOLTS
VA:
--------------------------------------- - V rms
1.732
RATEDVOLTS
VB:
--------------------------------------- - V rms
1.732
RATEDVOLTS
VC:
--------------------------------------- - V rms
1.732
5. Set I
to zero Amps.
op
The overvoltage function is a positive sequence overvoltage detector with adjustable time delay such that:
RATEDVOLTS
V
=
--------------------------------------- -
op
1.732
6. Raise phase A voltage from nominal to V
±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.
GE Power Management
∠
0°
∠
–
120°
∠
240°
–
×
PHOVPICKUP
+ 5 V = [________] V and check that contact A1 closes within
op
LPS-O Line Protection System
6.2 MEASURING UNIT TESTS
6.2.10 T10 – OVERVOLTAGE TEST
6
6-
7
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