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5.3 ZONE REACH AND TIMER TESTS
Z3DISTANCE
(301)
Z3PHASE = NO
(304)
Z3GRND = YES
Z4DISTANCE
(401)
Z4PHASE = NO
(405)
Z4GRND = NO
2.
Connect the relay as shown in Figure 4–3: PHASE TO GROUND TEST CONNECTIONS on page 4–12 for the appro-
priate phase under test.
3.
Set the relay to test mode 16 (Any Z3 Ground). The LUI displays: ANY Z3 GRND ON
4.
Set the voltage inputs to the following values:
VA: 67 volts rms ∠ 0°,
VB: 67 volts rms ∠–120°,
VC: 67 volts rms ∠+120°.
5.
Set the fault current, I
∠I DEGREES
–49
–79
–109
†
Reference only
6.
Set the fault current to 3.5 (0.7) A rms. Reduce the voltage of the faulted phase and check that the A1 contact closes
5
when the voltage is within the limits above.
7.
Reduce the fault current to zero. Note that the trip target indication concurs with the fault. An AG fault will be displayed
as follows: TRIP: AG Z3 "DIST", where "DIST" is the displayed target.
8.
Repeat the test for phase BG and CG faults.
1.
Setting:
Z1DISTANCE
(101)
Z1PHASE = NO
(104)
Z1GROUND = NO
Z2DISTANCE
(201)
Z2PHASE = NO
(204)
Z2GROUND = NO
Z3DISTANCE
(301)
Z3PHASE = NO
(304)
Z3GRND = NO
Z4DISTANCE
(401)
Z4PHASE = NO
(405)
Z4GRND = YES
2.
Connect the relay as shown in Figure 4–3: PHASE TO GROUND TEST CONNECTIONS on page 4–12 for the appro-
priate phase under test.
3.
Set the relay into test mode 17 (Any Zone 4 Ground). The LUI displays ANY Z4 GRD ON
4.
Set the voltage inputs to the following values:
VA: 67 volts rms ∠0°,
VB: 67 volts rms ∠–120°,
VC: 67 volts rms ∠+120°.
5-10
, to the phase-angle value listed below (increase VA, VB, and VC to 75V when ∠ I
op
VOLTS RMS
DISPLAYED TARGET
57 to 64
–
66 to 73
195 to 205
57 to 64
–
ALPS Advanced Line Protection System
5 FUNCTIONAL TESTS (FACTORY SETTINGS)
†
5.3.5 T14 - ZONE 4 GROUND REACH, M4G GROUND FAULTS
= – 79°).
op
GE Power Management
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