Trip Lockout Function - ABB REF 610 Technical Reference Manual

REF 610
4.1.6.
64
Feeder Protection Relay
Technical Reference Manual - ANSI Version
closed. The opening contact, on the contrary, is to be connected in series with the
external shunt resistor, which will enable trip-circuit supervision when the circuit
breaker is open; see Fig. 4.1.5.-1.
Trip-circuit supervision can be selected either via the HMI or with SPA parameter
V113.
PO1
TCS
SO2
HW
SW
TRIP-CIRCUIT
SUPERVISION
TCS STATE WARNING
Fig. 4.1.5.-1 Connecting the trip-circuit supervision using two external contacts
and the external resistor in the trip circuit

Trip lockout function

The trip lockout function is used to prevent accidental closing of the circuit breaker
after a trip. The trip lockout function must be locally reset with a separate reset
command before the circuit breaker can be closed again. This function is useful
when the trip output contact of the relay is latched or the open circuit of the circuit
breaker remains activated.
The trip lockout function is selected in SGF1. When selected, PO3 will be dedicated
to this function. As long as no trip occurs, PO3 will be closed.
Every signal which has been routed to PO3 via the output signal matrix will activate
the trip lockout function and open the contacts of PO3. When the contacts have
opened, they will be locked into the open state. The trip lockout function can also be
activated externally, via a digital input.
The trip lockout function can be reset via a digital input, the HMI or SPA parameter
V103, but not before the signal which activated the function has been reset.
X4.1
18
19
16
17
7
8
6
SGF1/8
HMI
1MRS 755535
+
R ext
-
R s