Signal Diagram - ABB REF601 Applications Manual

1MDU07212-YN Rev. A
4.9
REF601 / REJ601
Application Manual

Signal Diagram

The figure below schematically illustrates the analogue input, binary input / output
and LED indications.
Figure 4: Signal diagram of relay REF601/REJ601
Table 13: Analog inputs
L1, L2, L3 Current transformer input for phase L1, L2, L3 , either 1A or 5A
according to order type.
Io Earth current input through CBCT for external earth measurement,
either 1A or 5A according to order type.
Table 14: Binary inputs
BI1 Default configured as UNBLOCK
BI2 Default configured as TCS
BI3 Default configured as external trip command to breaker
BI4 Default configured as reset command for resetting indications and
contacts
Protection and Control Function
Section 4
21