Multilin SR469 - Voltage Phase Reversal Test

ADDITIONAL FUNCTIONAL TESTING 7. TESTING
7-12
The SR469 specification for unbalance accuracy is ±2%. Perform the steps below to verify accuracy.
1. Alter the following setpoints:
SETPOINT S2:SYSTEM SETUP\CURRENT SENSING\PHASE CT PRIMARY: 1000A
SETPOINT S2:SYSTEM SETUP\CURRENT SENSING\MOTOR FULL LOAD AMPS FLA: 1000A
2. Inject the values shown in the table below and verify accuracy of the measured values. View the measured values in:
ACTUAL VALUES A2:\METERING DATA\CURRENT METERING
Table 7-16 CURRENT UNBALANCE TEST
INJECTED
CURRENT
1A UNIT
(A)
INJECTED
CURRENT
5A UNIT
(A)
EXPECTED
UNBALANCE
LEVEL
(%)
MEASURED
UNBALANCE
LEVEL
(%)
Ia= 0.78 ∠0°
Ib=1 ∠247°
Ic=1 ∠113°
Ia= 3.9 ∠0°
Ib=5 ∠247°
Ic=5 ∠113°
14
Ia=1.56 ∠0°
Ib=2 ∠247°
Ic=2 ∠113°
Ia=7.8 ∠0°
Ib=10 ∠247°
Ic=10 ∠113°
15
Ia= 0.39 ∠0°
Ib=0.5 ∠247°
Ic=0.5 ∠113°
Ia= 1.95 ∠0°
Ib=2.5 ∠247°
Ic=2.5 ∠113°
7
7.3.4 VOLTAGE PHASE REVERSAL TEST
The SR469 can detect voltage phase rotation and protect against phase reversal. To test the phase reversal element, perform the following
steps:
1. Alter the following setpoints:
SETPOINT S2:SYSTEM SETUP\VOLTAGE SENSING\VT CONNECTION TYPE: Wye or Delta
SETPOINT S2:SYSTEM SETUP\POWER SYSTEM\SYSTEM PHASE SEQUENCE: ABC
SETPOINT S9:VOLTAGE ELEMENTS\PHASE REVERSAL\PHASE REVERSAL TRIP: Latched
SETPOINT S9:VOLTAGE ELEMENTS\PHASE REVERSAL\ASSIGN TRIP RELAYS: Trip
2. Apply voltages as per the table below. Verify the SR469 operation on voltage phase reversal.
Table 7-17 VOLTAGE PHASE REVERSAL TEST
APPLIED VOLTAGE EXPECTED RESULT
8 NO TRIP
4 PHASE REVERSAL TRIP
OBSERVED RESULT
8 NO TRIP
4 PHASE REVERSAL TRIP
Va=120V ∠0°
Vb=120V ∠120°
Vc=120V ∠240°
8
Va=120V ∠0°
Vb=120V ∠240°
Vc=120V ∠120°
4