ABB REF 542plus - Incoming Feeder with Synchrocheck

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A051283
Fig. 8.3.2.-1 Power transformer differential protection
8.3.3. Incoming feeder with synchrocheck
The Fig. 8.3.3.-1 shows a possible connection diagram for a generic incoming
feeder with synchrocheck function on the busbar.
Channels 1, 2, 3 are used for current sensing and Channels 4, 5, 6 are used for phase
to earth voltage measurements and protection of the incoming feeder. Channel 7 is
used for the residual current for earth fault protection while channel 8 is used for
busbar phase-to-phase voltage to perform the synchrocheck.
Multifunction Protection and Switchbay Control
Unit
Technical Reference Manual
REF 542plusREF 542plus
1MRS755859