ABB UniGear ZS1 - Page 24

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4. Panel design and equipment
Door interlocking
The panels are equipped with the following
interlocks:
• The apparatus (circuit-breaker or contactor)
can not be racked-in if the apparatus
compartment door is open. This interlock is
not available for emergency manual
operation with motorized withdrawable
apparatus.
• The apparatus compartment door cannot be
opened if the apparatus (circuit-breaker or
contactor) is in service or in an undefined
position.
• The earthing switch cannot be operated if
the cable compartment door is open.
• The cable compartment door cannot be
opened if the earthing switch is open.
Note:
When the interlocking for circuit-breaker is used
then it is necessary to use the OFF push button
on the door to provide emergency switching OFF.
Interlocks between panels
• The busbar earthing switch can only be
closed when all the withdrawable parts in the
relative busbar section are in the test /
disconnected position (electromechanical
interlock).
• When the busbar earthing switch is closed,
the withdrawable parts in the earthed busbar
section cannot be moved from the test /
disconnected position to the service position
(electromechanical interlock).
Locking devices
• The shutters can be secured independently
of each other with padlocks when the
withdrawable circuit-breaker part has been
removed.
• Access to the operating-shaft of the earthing
switch can be restricted with a padlock.
• Access to the circuit-breaker racking slot can
be restricted with a padlock.
• Access to the circuit-breaker compartment
and the cable compartment can be restricted
with a padlock.
WARNING
• The locking magnet is not installed in the
case of a motor operator; busbar earthing
switches or the withdrawable parts are
electrically locked. The manual emergency
switch is not locked!
• The apparatus compartment door interlock
is not available for motor operated
withdrawable apparatus as a mechanical
device (Figure 22). Manual operation of a
motorized withdrawable circuit-breaker
part should be performed in emergency
case only!
WARNING
• The door’s handle which is an integral part
of doors has to be push to its final close
position – see Figure 18 of closed and not
closed position of door’s handle.
• In case the door’s handle is not in its final
close position the doors are not closed yet.
In this case the interlock function cannot be
ensured.
Figure 18: A) Closed position of door’s handle; B) Not
closed position of door’s handle