ABB REU 610, Technical Reference Manual

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+
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Rext
R
int
TCS
HW
SW
X4.1
Rs
18
19
16
17
SO2
7
8
6
HMI
PO1
SGF1/8
TRIP-CIRCUIT
SUPERVISION
TCS STATE WARNING
A0403292
Fig. 5.1.5.-1 Connecting the trip-circuit supervision using two external contacts
and the external resistor in the trip circuit
5.1.6. 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 is
dedicated to this function. As long as no trip occurs, PO3 is closed.
Every signal which has been routed to PO3 via the output signal matrix
activates the trip lockout function and opens the contacts of PO3. When the
contacts have opened, they are 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.
In case of loss of auxiliary power when the trip lockout function is in use, the
contacts of PO3 return to the same state as before the loss, provided that the
battery has been inserted and is charged. If no battery has been inserted, the
trip lockout function is activated and the contacts of PO3 remain open when
the auxiliary power is switched on again.
50
REU 610
Voltage Relay
Technical Reference Manual - ANSI Version
1MRS755972