Masterpact ® circu it breaker
accessories
mechanical interlocks
•
disconnecting when circuit breaker is
closed
During any disconnecting attempt when the
circuit breaker is closed, an interlocking
device ensures the tripping of the circuit
breaker before the actual separation of the
main disconnects.
The circuit breaker remains, however,
operable in the other positions: test,
disconnected and withdrawn.
•
circuit breaker closing when not
completely connected
The interlocking device mentioned above
prevents closing of the circuit breaker if the
connecting operation is not completely
achieved.
•
connecting circuit breaker when door
opened
VPEC and VPOC options prevent the
compartment door from being opened when
the circuit breaker is in the connected
position and from connecting the circuit
breaker when the door is open.
door interlock (VPEC)
This lock prevents the compartment door
from being opened when the circuit breaker
is in the connected position. If the circuit
breaker is put into the "connected" position
with the door open, the door can be closed
without disconnecting the circuit breaker.
Note:
for greater protection, this interlock
can be used with racking interlock (VPOC)
below.
racking interlock (VPOC)
This lock prevents racking in the circuit
breaker when the door is open.
(Insertion of the circuit breaker racking crank
is not possible when the compartment door is
open.)
electrical interlocks
•
priority of opening orders (standard)
Opening coils (undervoltage trip devices,
shunt trip) and opening push button have
priority over the closing coils and closing
push button.
•
mechanical pop-out type indicator
(standard)
Under overcurrent or ground-fault
conditions, the trip indicator located in the
control unit will pop out. Reclosing of the
circuit breaker is impossible until this trip
indicator is reset.
This standard function can be disabled on
request.
•
anti-pumping function (standard)
In case of permanent energization of the
closing coil (XF), the circuit breaker remains
in the open position
G)
after it has been
opened, either by manual or electrical
operation. The circuit breaker can be closed
only if the closing coil is momentarily
de-energized.
@
Note:
this anti-pumping function can be
disabled by series connecting a "ready to
close" (NC contact) switch (PF) with the
closing coil (XF).
locking devices
summary of i nterlockings
push button locking device
(VBP)
This device prevents local manual operation
of the circuit breaker by covering the
opening and/or closing the push buttons.
This locking device can be locked by a
padlock or a sealing lead.
open position lock (VSKA)
A key interlock that locks the circuit breaker
in the open position by holding the push
button in its depressed position.
The key interlock is provided.
disconnected position
locking
The circuit breaker can b e locked in the
disconnected position by means of
1 to 3 padlocks (padlocks not provided) or
1
key interlock (factory-mounted option
VSKC).
The key interlock is on the stationary
assembly and accessible with the cubicle
door locked.
Note:
•
key interlock is of the captive key type,
free when locked.
•
by special order, locking may be possible
on disconnected, test and connected
positions (VSKEC).
closing coil
ON
ON
_
OFF
OFF
:
@
shunt trip @
OFF
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I
circuit
i
1
breaker status
l
OFF
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I
I
I
I
I
I
I
[
ON
I
I
ON
r
-
I
��-
- - - -
-
without
I
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1
anti-pumping
I
1
I
function
I
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-
OFF
OFF
CD
MP1017A.O
®
same anti-pumping function with undervoltage
trip device
1 9
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. ElectricalPartManuals
. com
