16 VM1 - USER MANUAL
—
7. Operation
7.1.6. Truck locking magnet (compulsory device)
The locking magnet is inserted in withdrawable
circuit breakers with manual movement and
prevents traverse of the withdrawable truck when
there is no power supply voltage.
It is always provided since it is an integral part of
the safety interlock against racking-out with the
apparatus closed due to any possible fault
situation.
Circuit breaker closed Circuit breaker open Capacity of the capacitor/s
Ready signal: lit Ready signal: lit
Sufficient energy for an O-C-O cycle
Ready contact: closed Ready contact: closed
Not Ready contact: open Not Ready contact: open
Ready signal: flashing Ready signal: flashing
Sufficient energy for a C-O cycleReady contact: closed Ready contact: closed
Not Ready contact: open Not Ready contact: open
Ready signal: flashing Ready signal: off
Sufficient energy for one opening
Ready contact: closed Ready contact: open
Not Ready contact: open Not Ready contact: closed
Ready signal: off Ready signal off:
Insufficient energy for opening
Ready contact: open Ready contact: open
Not Ready contact: closed Not Ready contact: closed
Meaning of the signals according to the charging state of the capacitor/s
Circuit breaker closed Circuit breaker open State of the coils
Ready signal: flashing Ready signal: off
No continuity
the closing coil
Ready contact: closed Ready contact: open in
Not Ready contact: open Not Ready Contact: closed
Ready signal: off Ready signal: off
No continuity
in the opening coil
Ready contact: open Ready contact: open
Not Ready contact: closed Not Ready contact: closed
Meaning of the signals according to the state of continuity of the coils
7.1.5. “READY” signalling
The luminous signal and relative “READY/NOT
READY” contacts signal:
capacitor/s charged
detection of the correct “CLOSED” and “OPEN”
positions by the position sensors
watchdog (function only present on the FULL
OPTION control module).
If the luminous “READY” signal is off or flashing,
please refer to the table below to find the cause.
Note:
To carry out circuit breaker closing it is not sufficient for the
luminous READY signal to be lit and the relative contact
activated. It is indispensable to apply voltage to the logical
“-SL1”: 24 ... 240 V d.c. / a.c. input (input for commanding
locking on closing; this function is the same as the one carried
out by the locking electromagnet in the mechanical operating
mechanism of the VD4 circuit breaker).
To Next Page
Loading...
