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Section 11
Testing functionality by secondary injection
11.4.15
Phase preference logic PPL2PHIZ
Prepare the IED for verification of settings outlined in Section
11.4.15.1
Function revision history
Document
revision
A
B
C
D
E
F
G
H
11.4.15.2
Verifying the signals and settings
The Phase preference logic function PPL2PHIZ is tested with a three-phase testing equipment for
distance protections. PPL2PHIZ is tested in co-operation with the High speed distance protection
ZMFPDIS. The distance protection and the phase preference logic shall be set to values according to
the real set values to be used. The test is made by means of injection of voltage and current where
the amplitude of both current and voltage and the phase angle between the voltage and current can
be controlled.
During the test the following binary signals (outputs) shall be monitored:
•
Trip signal from distance protection
•
Start signal from phase preference logic
1.
Connect the test set for injection of voltage and current.
2.
Inject voltages and currents corresponding to a phase-to-phase to earth fault within zone 1 of
the distance protection function. In the test one of the current inputs (one of the faulted phases)
is disconnected. The remaining current is the fault current out on the protected line. All
combinations of two phase-to-earth faults with one phase current are tested. The result shall be
according to
phase-to-earth voltage, zero-sequence voltage and phase current so that the conditions set for
the logic are fulfilled.
Table 38:
OperMode
No Filter
No Pref
1231c
1321c
123a
132a
213a
Table continues on next page
152
Product
History
revision
2.2.1
-
2.2.1
-
2.2.2
-
2.2.3
-
2.2.3
-
2.2.4
-
2.2.4
Setting ranges and setting descriptions have been updated in order to make the function
more user friendly. The added logic takes over if the relay detects the two faulty phases
within 20 ms and allows a larger margin of undervoltage to detect the faulty phases.
2.2.5
-
Table
38. It should be checked that the fault will give phase-to-phase voltage,
Operation at different combinations of faults and operation mode
Fault type/Faulted phase current to the IED
L1L2N/IL1
L1L2N/IL2
Trip
Trip
Trip
Trip
Trip
No Trip
No Trip
Trip
Trip
No Trip
Trip
No Trip
No Trip
Trip
© 2017 - 2022 Hitachi Energy. All rights reserved
"Preparing the IED to verify
L2L3N/IL2
L2L3N/IL3
L3L1N/IL1
Trip
Trip
Trip
Trip
Trip
No Trip
No Trip
Trip
Trip
No Trip
No Trip
Trip
Trip
No Trip
1MRK 505 378-UEN Rev. K
GUID-E1547542-1407-4488-AD99-2A7D063885A4 v2
GUID-F8B83D26-CCDC-4E1C-940A-F3B47A5AB4B0 v2
GUID-89399120-E87F-4380-8955-37BF1BAB34AF v1
L3L1N/IL3
Trip
Trip
Trip
Trip
No Trip
Trip
Trip
No Trip
Trip
No Trip
Trip
No Trip
Trip
No Trip
Line differential protection RED670
Commissioning manual
settings".
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