ABB Relion 615 series Applications Manual page 39

1MRS756885 A
REM615
Application Manual
GUID-AC0AE2D0-1238-4D03-88AA-57D310CED5B7 V1 EN
Figure 17: Supervision functions
Two separate trip circuit supervision functions are included, TCSSCBR1 for PO3
(X100:16-19) for Master Trip and TCSSCBR2 for PO4 (X100:20-23) for circuit
breaker closing. The trip circuit supervision 1 is blocked by the Master Trip
(TRPPTRC1) and the circuit-breaker open position signal. The trip circuit
supervision 2 is used for circuit breaker closing and therefore blocked when the
circuit breaker is closed. The TCS alarm indication is connected to LED 9.
By default it is expected that there is no external resistor in the
circuit breaker tripping/closing coil circuit connected parallel with
circuit breaker normally open/closed auxiliary contact.
The motor runtime counter alarm is connected also to the alarm LED 9.
The fuse failure supervision SEQRFUF1 detects failures in voltage measurement
circuits. Failures such as open miniature circuit breaker are detected and the alarm
is connected to the alarm LED 9.
Failures in current measuring circuits are detected by CCRDIF. When a failure is
detected, blocking signal is activated in current protection functions which are
measuring calculated sequence component currents, and unnecessary operation can
be avoided. The alarm signal is connected to the alarm LED 9.
Section 3
REM615 variants
33