ABB Relion 670 Series Commissioning Manual page 227

1MRK 506 371-UUS E
Check the tripping function by activating the CR and CR_GUARD inputs with the overreaching zone
used to achieve the PLTR_CRD signal.
It is sufficient to activate the zones with only one type of fault with the secondary injection.
11.11.1.1 Testing permissive underreaching
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 indications are obtained for the actual
type of fault generated.
5. Check that other zones operate according to their zone timers and that the send (CS) signal
is obtained only for the zone configured to generate the actual signal.
6. Deactivate the receive (CR) 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.
11.11.1.2 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.
11.11.1.3 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 trip time complies with the
5. Check that the other zones trip 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.
Line distance protection REL670
Commissioning manual
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Testing functionality by secondary injection
tCoord timer (plus relay measuring time).
Section 11
M13868-10 v4
M13868-28 v4
M13868-50 v5
221