ABB RER670 - Verifying the Directional Sensitive Protection; Verifying the Directional Unrestrained Protection; Verifying the Restrained Protection; Verifying the Unrestrained Protection

10.3.2.1 Verifying the restrained protection
GUID-2429DE17-A458-4773-9A59-3C0E138B3CDF v2
1. Use settings for the installation.
2. Inject currents corresponding to the transformer rated current on both sides so
that the differential current is 0% and the bias current is 100%.
3. Decrease the injected current on one side until TRRES is set, and note the
value.
4. Increase the injected current until TRRES is reset, and note the value.
10.3.2.2 Verifying the unrestrained protection
GUID-F637A553-A3B7-4CA8-A975-29566DAF86B5 v2
1. Use the settings for the installation.
2. Feed one side of the IED with injected current only, increase the current until
TRUNRES is set, and note the value.
3. Decrease the injected current until TRUNRES is reset, and note the value.
10.3.2.3 Verifying the directional unrestrained protection
GUID-F129A972-AE80-4D19-A6D4-0F5547A4FC8F v2
1. Use settings for the installation.
2. Inject currents corresponding to the transformer rated current on both sides so
that the differential current is 0% and the bias current is 100%.
3. Decrease the phase angle between the sides slowly from 180 degrees until
TRDRUNR is set, and note the value of the angle between the two sides at
the moment of the TRDRUNR operation.
4. Increase the phase angle back slowly until TRDRUNR resets, and note the
value.
10.3.2.4 Verifying the directional sensitive protection
GUID-98EE9BC4-BF63-42B1-A132-AFB24CA200DB v2
1. Use settings for the installation.
2. Inject currents corresponding to the transformer rated current on both sides so
that the differential current is 0% and the bias current is 100%.
3. Make sure that both currents are above 10 percent of the rated current values.
4. Slowly decrease the phase angle between the sides from 180 degrees apart
until TRDRSEN is set, and note the value.
5. Ensure that START is not set, otherwise it will block TRDRSEN.
6. Increase the phase angle back slowly until TRDRSEN resets, and note the
value.
1MRK 506 377-UEN C Section 10
Testing functionality by secondary injection
Railway application RER670 2.2 IEC 79
Commissioning manual