Hitachi Relion 670 Series Commissioning Manual page 122

Section 11
Testing functionality by secondary injection
Observe that the zones that are not tested have to be blocked and the zone that is tested has to be
released.
4. Repeat steps
and table .
11.4.8.4 Measuring the operating time of distance protection zones
Procedure:
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 and table for zone 1. Compare the result of the measurement with the setting
t1PP.
3. Repeat steps
10 in figure and table . Compare the result of the measurement with the setting t1PG.
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.
11.4.8.5 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.
11.4.8.6 Completing the test
Continue to test another function or end the test by changing the TESTMODE setting to Disabled.
Restore connections and settings to the original values, if changed for testing purposes.
11.4.9 Power swing detection, blocking and unblocking ZMBURPSB
Prepare the IED for verification of settings outlined in Section
Values of the logical signals for ZMBURPSB are available on the local HMI under Main menu /Test/
Function status /Impedance protection/PowerSwingDetection(68,Zpsb) /ZMBURPSB(68;Zpsb):1
The Signal Monitoring tool in PCM600 shows same signals that are available on the local HMI.
116
1 to 3 to find the operating value for the phase-to-ground fault C-G according to figure
Test points 8, 9, 10 and 11 are intended to test the directional lines of impedance protection.
Since directionality is a common function for all seven measuring zones, it is only necessary
to test points 8, 9, 10 and 11 once, in the forward direction in order to test the accuracy of
directionality (directional angles). Directional functionality testing (trip inside, no-trip outside)
should always be made for all impedance zones set with directionality (forward or reverse).
1 to 2 to find the operating time for the phase-to-ground fault according to test point
1 to 2 to find the operating time for all other used measuring zones.
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"Preparing the IED to verify
Line distance protection REL670
Commissioning manual
settings".