Transient Directional Element; Completing The Test; Power Swing Detection Zmrpsb; Verifying The Signal And Settings - ABB Relion 670 Series Commissioning Manual

Section 11
Testing functionality by secondary injection
1. Subject the IED to healthy normal load conditions for at least two seconds.
2. Apply the fault condition to find the operating time for the phase-to-phase fault
according to test point 10 in figure
measurement with the setting
3. Repeat steps
test point 10 in figure
setting
4. Repeat steps
Observe that the zones that are not tested have to be blocked and the zone that is tested
has to be released.
11.4.8.3

Transient directional element

Since the transient directional element is operating in the time domain, based on an RL circuit
model, it expects that the input current signals have proper transitions going from healthy to
faulty state. This essentially means that the test equipment has to be able to generate
currents with a DC-component bridging the two states, without discontinuities, even when a
pre-fault load current is present. If not, the result of the test will not be valid.
11.4.8.4

Completing the test

continue to test another function or end the test by changing the
Restore connections and settings to their original values, if they were changed for testing
purposes.
11.4.9

Power swing detection ZMRPSB

Prepare the IED for verification of settings outlined in Section
settings".
Values of the logical signals for ZMRPSB are available on the local HMI under Main menu/Test/
Function status/Impedance protection/PowerSwingDetection(68,Zpsb)/
ZMRPSB(68;Zpsb):1
The Signal Monitoring tool in PCM600 shows same signals that are available on the local HMI.
11.4.9.1

Verifying the signal and settings

Measure the operating characteristics during constant current conditions. Keep the measured
current as close as possible to the rated value of the IED or lower. Ensure that it is higher than
the set minimum operating current.
Ensure that the maximum continuous current to the IED does not exceed four times of its
rated value, if the measurement of the operating characteristics runs under constant voltage
conditions.
The test is mainly divided into two parts, one aim is to verify that the settings are in
accordance with the selectivity plan and another aim is to verify the operation of ZMRPSB.
Before starting this testing process, all impedance measuring zones shall be set and in
operation. Ensure that the inner zone of ZMRPSB must cover all impedance measuring zones
that are set for operation.
Test of the interactions or combinations that are not configured are not considered in this
instruction.
130
1 to 2 to find the operating time for the phase-to-earth fault according to
38 and table 33. Compare the result of the measurement with the
t1PE .
1 to 2 to find the operating time for all other used measuring zones.
© Copyright 2017 ABB. All rights reserved
37 and table 32 for zone 1. Compare the result of the
t1PP .
1MRK 504 165-UEN E
GUID-401518F3-26DD-4994-80A1-DE94D51945E9 v1
GUID-7FA2EA27-B6E2-48AB-8D53-22425E322FFA v1
TESTMODE setting to Off .
"Preparing the IED to verify
GUID-8C431186-DD43-4A24-B94B-7E44CA27CB73 v1
Transformer protection RET670
Commissioning manual
M13888-2 v10