ABB REB670 Series, Applications Manual

Page: 136 / 476

1. Connect the two auxiliary contacts (i.e. normally open and normally closed auxiliary
contacts or also sometimes called “a & b contacts”) from each of the three busbar
disconnectors to the IED. This can be done by wiring using binary inputs or via
communication (e.g. via GOOSE or via LDCM).
2. Use three BDCGAPC function blocks (i.e. one per busbar disconnector) to derive open or
closed status of the respective disconnector primary contacts.
3. Connect the close status output from each BDCGAPC function block to the respective
zone control input on the feeder bay function block BFPTRC_Fxx. This will ensure proper
dynamic inclusion of the feeder CT measurement towards the differential protection
zones.
4. Connect the feeder current from the TRM via pre-processing block to the bay function
block BFPTRC_Fxx.
5. Connect the trip output from BFPTRC_Fxx function block to the binary output contact
(alternatively the tripping can also be arranged using GOOSE communication). This will
ensure proper tripping of this feeder bay for any relevant operation of the BBP including
BFP tripping.
ACT configuration example for Feeder 01 located at Section 1 is given in Figure 76 . Any other
feeders located at Section 1 shall be engineered in the similar way.
IEC16000147-1.en.vsdx
IEC16000147 V1 EN-US
Figure 76: ACT configuration example for Feeder 01 in Section 1
Step 3: ACT engineering of the feeder bays at Section 2
Identical steps to Step 2 shall be done for the feeders located at the second section, namely
Section 2. The only difference is that in Section 2, the relevant zones are Z4, Z5 and Z6.
ACT configuration example for Feeder 17 located at Section 2 is given in Figure 77 . Any other
feeders located at Section 2 shall be engineered in the similar way.
Section 6 1MRK 505 370-UEN D
Differential protection
130 Busbar protection REB670
Application manual