ABB V-Contact VSC Series Installation And Service Instructions Manual page 22

(*) This lock consists of
some pins assembled in
the plugs of the auxiliary
circuits which, with a
suitable code, prevent
connection of the plug in
the enclosure socket.
The lock also foresees
compulsory application
of the locking magnet in
the truck.
20
5.6.2.1. Description of the locks for
withdrawable contactors
– Electric lock which prevents the contactor be-
ing closed when the truck is not in the racked-
in and isolated positions.
– Mechanical lock which prevents the contactor
being racked-in and out when it is closed and
closing of the contactor when the truck is not
in the racked-in and isolated positions.
– Electric lock which prevents closing of the
contactor when a fuse is missing or blown.
– Lock which prevents putting a contactor into
service in an enclosure preset for a circuit-
breaker (*).
– Locking electromagnet on the contactor truck
which when there is no voltage, prevents rack-
ing-in or racking-out.
– Mechanical lock which prevents contactor
racking-in if the enclosure door is not closed
(requires the same interlock in the fixed part).
– Mechanical interlock with earthing switch
placed on the enclosure - with earthing switch
closed the contactor cannot be racked-in and
with the contactor racked-in or in intermedi-
ate positions between racked-in and isolated,
it is not possible to close the earthing switch.
– Mechanical lock of the shutters when the
contactor is racked-out.
– Key lock on contactor racking-in - it is only
possible to activate the lock and free the key
preventing contactor racking-in with the
contactor in the isolated position.
– Key lock with earthing switch open - this can
only be activated with the earthing switch
open. The key can only be removed with the
electric lock activated.
– Key lock with earthing switch closed - this can
only be activated with the contactor in the iso-
lated position and with the earthing switch
closed. The key can only be removed with
the lock activated.
– Preset for independent padlock locks of the
shutters and in the closed and/or open posi-
tion.
– Electric lock on racking-in and racking-out
with the door open (microswitch on the door)
of the enclosure connected in series with the
locking electromagnet on the contactor truck.
– Key lock on earthing truck racking-in - with
the lock activated all the operations with the
contactor are possible, but positioning the
earthing truck in the isolated position start-
ing from the racked-out position is not al-
lowed.
– Mechanical lock which prevents racking-out
of the connector of the auxiliaries when the
contactor is racked-in and during racking-in
and racking-out.
– Electro-mechanical lock on de-energisation
for the earthing switch, which when there is
no voltage prevents the earthing switch op-
erations.
– Electro-mechanical lock on the compartment
door.
5.7. Description of the closing and
opening operations
The contactor drive operates in two different
ways as shown in Table 1.
For the DCO version, further personalisation
of the apparatus can be made. In fact – the first
of its kind – the V-Contact VSC contactor is fit-
ted (on request) with an undervoltage function
(UV) with delays which can be set according to
the requirements of the installation.
For a more detailed description of the behaviour
of the apparatus according to the version, see
table 2.
Supply the contactor with auxiliary voltage and
operate it several times electrically. The
contactor must carry out the opening and clos-
ing operations correctly at between 85% and
110% of the rated auxiliary control voltage.