GE LPS-O - T13: Zone 3 Phase Reach Test

6-
12
LPS-O Line Protection System GE Power Management
6.3 ZONE REACH TESTS 6 FUNCTIONAL TESTS (USER SETTINGS)
6
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
op
, phase angle to
∠
I
2
= [________]° lagging. Note that the leading phase angle is
180° out of phase with the line to which it is shorted.
6. Set the fault current to
I
T
= [________] A rms. Simultaneously reduce the voltages of the faulted phases
and verify that the A1 contact closes when the voltages are within 7% of
V
NOM 2
.
7. 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.
8. Repeat the test for phase BC and CA faults.
6.3.6 T13 – ZONE 3 PHASE REACH TEST
1. Setting:
Z1DISTANCE
(101)
Z1PHASE
= NO
Z2DISTANCE
(201)
Z2PHASE
= NO
Z3DISTANCE
(301)
Z3PHASE
= YES
(302)
Z3PHREACH
= [________]
Ω
(304)
Z3P_TIME
= 2.0 sec.
Z4DISTANCE
(401)
Z4PHASE
= NO
LINEINFO
(1204)
TRSFMRTYPE
= NONE
2. Record the following values:
V
NOM 3
= [________] V
I
T
= [________] A
∠
I
3
= [________]°
3. Connect the relay as shown in Figure 5–1: PHASE-TO-PHASE TEST CONNECTIONS on page 5–7 for
the appropriate phase under test. Set the relay to test mode 16 (Any Zone 3 Phase). The LUI displays:
ANY Z3 PHASE ON