Functional Diagrams For Control And Interlocking - ABB REF615 Applications Manual

1MRS756378 D
3.7.3.3
REF615
Application Manual
The fuse failure supervision provides functionality for detecting failures in voltage
measurement circuits. Failures, such as open miniature circuit breaker, are detected
and the alarm is connected to the supervision alarm LED 9.
Failures in current measuring circuits are detected by the current measuring circuit
supervision function CCRDIF. When a failure is detected, the blocking signal is
activated in current protection functions measuring calculated sequence component
currents, and unnecessary operation can be avoided. The alarm signal is connected
to supervision alarm LED 9.
GUID-48DD2A49-CF29-4088-914B-7AE1629E18CA V1 EN
Figure 46: Trip circuit supervision

Functional diagrams for control and interlocking

The operate signals from the protections are connected to the two trip output contacts
PO3 (X100:16-19) and PO4 (X100:20-23) via the corresponding Master Trips
TRPPTRC1 and TRPPTRC2. Open control commands to the circuit breaker from
local or remote CBXCBR1-exe_op or from the autorecloser DARREC1-open_cb are
connected directly to the output PO3 (X100:16-19).
Section 3
REF615 variants
89