Technical data

11/98
©1995 Square D—All Rights Reserved
32
Accessories
Mechanical Interlocks
n 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withdrawn.
n 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.
n 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.
Electrical Interlocks
n 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.
n Mechanical Pop-out Type Indicator (Standard):
Under overcurrent or ground-fault conditions, the trip indicator located in the control unit will pop
out. It is not possible to close the circuit breaker until this trip indicator is reset. This standard
function can be disabled upon request.
n Anti-pumping Function (Standard):
In case the closing coil (XF) becomes permanently energized, the circuit breaker remains in the
open position A 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 B.
Note: This anti-pumping function can be disabled by series connecting a "ready to close" (NC
contact) switch (PF) with the closing coil (XF).
06313066
Without
Anti-pumping
Function
ON
ON
OFF
ON
OFF OFF
OFF B
ON
OFF OFF
A
ON
Closing Coil
Circuit
Breaker Status
Shunt Trip (same anti-pumping function with undervoltage trip device)