Testing Blocking Scheme; Testing Delta Blocking Scheme; Checking Of Unblocking Logic - ABB Relion 650 Series Commissioning Manual

Section 9
Testing functionality by secondary injection
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.
9.10.1.4

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.
9.10.1.5

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.
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. Check that for a forward fault, carrier send (CS) signal is first obtained from the delta based
fault inception detection (as it is not directional) , and immediately inhibited by the forward
zone.
7. Activate the IED receive (CR) signal.
8. Apply a fault condition in the forward directed zone used for scheme communication tripping.
9. Check that the no trip from scheme communication occurs.
10. 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.
9.10.1.6

Checking of unblocking logic

Check the unblocking function (if the function is required) when checking the communication
scheme.
Command function with continuous unblocking (Unblock = 1)
Procedure
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