Hitachi Relion 670 Series Commissioning Manual page 226

Section 11
Testing functionality by secondary injection
4. Check that correct trip outputs, external signals, and indications are obtained for all the actual types
of fault generated.
5. Check that other zones operate according to their zone timers and that the send (CS_x) signal is
obtained only for the zone and phase configured to generate the actual signal.
6. Deactivate the receive (CRLx) signal in the IED.
7. Check that the trip time complies with the zone timers and that correct trip outputs, external signals,
and indications are obtained for the actual type of fault generated.
11.11.2.3 Testing permissive overreaching
1. Activate the receive (CRLx) signal in the IED.
2. Apply healthy normal load conditions to the IED for at least two seconds.
3. Apply a fault condition within the permissive zone.
4. Check that correct trip outputs, external signals, and indication are obtained for the all actual types
of fault generated.
5. Check that the other zones operate according to their zone timer and that the send (CS_x) signal is
obtained only for the zones and phases that are configured to give the actual signal. Also the zone
connected to CS_x underreach is giving CS_x in this mode.
6. Deactivate the IED receive (CRLx) signal.
7. Apply healthy normal load conditions to the IED for at least two seconds.
8. Apply a fault condition within the permissive zone.
9. Check that trip time complies with the zone timers and that correct trip outputs, external signals,
and indications are obtained for the actual type of fault generated.
11.11.2.4 Testing blocking scheme
1. Deactivate the receive (CRLx) signal of the IED.
2. Apply healthy normal load conditions to the IED for at least two seconds.
3. Apply a fault condition within the forward directed zone used for scheme communication tripping.
4. Check that correct trip outputs and external signals are obtained for the type of fault generated and
that the operate time complies with the tCoord timer (plus relay measuring time).
5. Check that the other zones operate according to their zone times and that a send (CS_x) signal is
only obtained for the reverse zone.
6. Activate the IED receive (CRLx) signal.
7. Apply a fault condition in the forward directed zone used for scheme communication tripping.
8. Check that the no trip from scheme communication occurs.
9. Check that the trip time from the forward directed zone used for scheme communication tripping
complies with the zone timer and that correct trip outputs, external signals, and indications are
obtained for the actual type of fault generated.
11.11.2.5 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.
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Line distance protection REL670
Commissioning manual