Activation of the different zones verifies that the CS signal is issued from the
intended zones. The CS signal from the independent tripping zone must have a
tSendMin minimum time.
Check the tripping function by activating the CR and CRG inputs with the
overreaching zone used to achieve the
CACC 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
M13868-10 v4
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
M13868-28 v4
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
M13868-50 v5
1MRK 505 378-UEN A Section 11
Testing functionality by secondary injection
Line differential protection RED670 2.2 IEC 237
Commissioning manual
To Next Page
Loading...
Need help?
General
