5-
18
LPS-D Line Protection System
GE Power Management
5.4 PHASE-TO-PHASE ZONE REACH TESTING
5 FUNCTIONAL TESTS (FACTORY SETTINGS)
5
5.4.2 T17 – ZONE 2 PHASE REACH, M2 FAULTS
1.
Protection Settings:
Z1DISTANCE
(101)
Z1PHASE = NO
(104)
Z1GROUND = NO
Z2DISTANCE
(201)
Z2PHASE = YES
(204)
Z2GROUND = NO
(209)
Z2P_TIME = 0.1
(210)
Z2G_TIME = 0.1
Z3DISTANCE
(301)
Z3PHASE = NO
(304)
Z3GRND = NO
Z4DISTANCE
(401)
Z4PHASE = NO
(405)
Z4GRND = NO
OVERCUR
(601)
50 = NO
(605)
50G = NO
(610)
51G = NO
OS BLOCKING
(1603) BLOCKWHAT = 3 (BLKNONE)
2.
Connect the relay as shown in Figure 5–1: PHASE-TO-PHASE TEST CONNECTIONS on page 5–7 for
the appropriate phases under test. Set the relay to test mode 31 (Any Zone 2 Phase). The LUI displays:
ANY Z2 PHASE ON
3.
Set the voltage inputs as follows: VA: 67 V rms
∠
0°, VB: 67 V rms
∠
–120°, VC: 67 V rms
∠
+120°.
4.
Set the fault current,
I
op
, to the phase-angle value listed in below. Note that the leading phase angle is 180°
out of phase with the line to which it is shorted (Increase VA, VB, and VC to 75 V when
∠
I
op
= –55°).
5.
Set the fault current to 6.7 (1.4) amps rms. Reduce the voltages of the faulted phases and check that the
A1 contact closes when the voltages are within the limits shown above.
6.
Reduce
I
op
of the faulted phase to zero. Note that the trip target indication concurs with the fault. For
example, an AB fault is displayed as follows:
TRIP AB Z2 "DIST"
where “DIST” is the displayed target.
7.
Repeat the test for phase BC and CA faults.
∠
I Degrees
Volts rms
Displayed Target
†
–25
57 to 64
–
–55
65 to 73
146 to 154
–85
57 to 64
–
†
Reference only
Содержание LPS-D
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