Unit Insertion And Withdrawal; Standard Interlocking - Eaton Power Xpert UX 12 User Manual

Switching off
Press the OFF button.
The unit switches off.

 The position indicator, if fitted, shows the unit is in the
OFF position.
 For circuit breaker operation the mechanism spring is
automatically re-charged.
4.2

Unit insertion and withdrawal

This and the following paragraphs contain instructions for
the insertion and withdrawal of withdrawable circuit
breaker units. The same procedure is followed to insert
and remove other withdrawable units such as contactors,
voltage transformers, earthing trucks etc.
It is possible that any specific installation requires
operations which have not been described in this manual
for these, refer to the separate operating instructions
provided for those specific operations
.
The units are fitted with interlocks to prevent them from
being inserted or withdrawn at the wrong time or in the
wrong place. A special hand crank is provided to rack the
unit IN and OUT of the compartment.
During initial insertion (insert position) or complete
withdrawal (removed position) of a unit from the panel, a
lifting and transportation trolley is used.
4.2.1

Standard interlocking

A unit can be set in three interlocked positions, namely:
INSERT/REMOVED
Ensure that any padlocks that have been used to
lock the shutters have been removed before the unit
is inserted.
The unit is outside of the panel, mounted on the
transportation trolley and ready for insertion into the
panel. The 58-pole secondary plug is unplugged and the
unit is ready to be completely removed from the panel.
It is possible to complete a functional test on the unit in
the removed position with the use of the optional
extension umbilical cable which connects the secondary
plug of the unit with the stationary secondary socked
inside the compartment.
In this position the shutters are closed and can be
padlocked for additional safety
TEST
The unit is in the panel and located at the front of the
compartment; the unit has not yet made contact with the
cable and the busbar. The 58-pole secondary plug can
now be connected.
NOTE
®
Power Xpert UX with W-VACi circuit breaker 6063308 G01 01 14 July 2011 www.eaton.com
In the Test position, the unit can be operated electrically
and mechanically with the door open.
The earthing switch can be operated with the door open
or closed when the unit is in the Test position.
The unit can only be put into the Service position when
the earthing switch is open.
In this position the shutters are closed.
The unit can be moved (racked in) from the Test position
to the Service position by means of a hand crank. The
earth switch must be Open to allow the unit to be racked
in. Any padlocks fitted to the shutter mechanisms should
have been removed.
The unit can be put into the Service position from this Test
position only when the door is closed and any padlocks
removed.
If the shutter padlocks have not been removed
and the unit is forcibly racked in damage may be
caused to the shutters and / or the carriage
mechanism.
Opening and Closing of the unit is only possible when the
hand crank has been removed. When the unit is Closed, it
cannot be moved either into the connected or out to the
test position.
SERVICE
The unit is fully inserted and the hand crank has been
removed.
The earthing switch cannot be operated.
Opening and Closing is only possible when the hand
crank has been removed. When the unit is Closed,it
cannot be moved
The door of the compartment cannot be opened with the
unit in the Service position
The unit is now fully operational
Apart from the interlocks described above, other
interlocks may be present depending on the options
chosen.
System operation
WARNING
NOTE
41