Testing Permissive Overreaching; Testing Blocking Scheme; Testing Delta Blocking Scheme - ABB rec670 Commissioning Manual

Section 10
Testing functionality by secondary injection
10.10.1.2
10.10.1.3
10.10.1.4
168

Testing permissive overreaching

1. Activate the receive (CR) 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 actual type of fault generated.
5. Check that the other zones operate according to their zone timer and that the send
(CS) signal is obtained only for the zones that are configured to give the actual
signal. Also the zone connected to CS underreach is giving CS in this mode.
6. Deactivate the IED receive (CR) 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.

Testing blocking scheme

1. Deactivate the receive (CR) 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) signal is only obtained for the reverse zone.
6. Activate the IED receive (CR) 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.

Testing delta blocking scheme

1. Deactivate the receive (CR) 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.
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Bay control REC670 2.1 IEC
Commissioning manual