ABB REF 542plus Technical Reference Manual

A070120
Fig. 8.3.1.-1 Generic outgoing feeder
8.3.2. Feeder with differential protection
The schematic diagram below shows the connection for a power transformer feeder
with differential, earth-fault and restricted earth fault protection.
The used analog input board has 8 inputs for currents. The first 6 channels are used
for the differential protection; channel 7 is used for the restricted earth fault
protection and channel 8 for the earth protection.
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REF 542plusREF 542plus
Multifunction Protection and Switchbay Control
Unit
Technical Reference Manual
1MRS755859

ABB REF 542plus Specifications

General

Brand	ABB
Model	REF 542plus
Category	Control Unit
Language	English