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ABB Substation Automation
Products and Systems
4
4.1
4.1.1
4.1.1.1
1MRS750940-MUM
Technical Reference Manual
Technical description
Functional description
Product functions
Schema of product functions
IL1
THREE PHASE DEFINITE TIME OR
INVERSE TIME LOW-SET
OVERCURRENT PROTECTION
IL2
THREE PHASE INSTANTANEOUS OR
DEFINITE TIME HIGH-SET
IL3
OVERCURRENT PROTECTION
CIRCUIT-BREAKER FAILURE
PROTECTION
BINARY
INPUT BI
REMOTE RESET, REMOTE SETTING
CONTROL OR BLOCKING INPUT FOR
THE DIFFERENT PROTECTION STAGES
SERIAL COMMUNICATION
Figure 4.1.1.1-1 Product functions
PO1
51
PO2
50
SO1
SO2
62 BF
IRF
OPTICAL PC-INTERFACE
REJ 523
9
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