Useful Tips For Service Situations; Release The Door - ABB Zenith ZBTS T Series Installation And Operating Instruction

3 4 Z B T S _ 1 0 0 – 6 0 0 A r e v. B / 1 S C C 3 0 3 0 4 4 M 0 2 0 1
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9.2 Useful Tips for Service Situations

These operations are recommended for
maintenance use only. In normal use,
these operations are not recommended
unless necessary.

9.2.1 Release the Door

For safety reasons, the enclosure doors of
the withdrawable units have equipped
with a lock that prevents the door from
opening when the draw-out unit is con-
nected or in the test location. When the
switch reaches an isolated location, this
automatically releases the door allowing
it to open. It is possible to override the
lock, but it is only permitted in service
situations.
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Fig. 9.1 Release the door
If the door needs to be opened for service
situations even when the product is ener-
gized, it is possible to use a service mode:
1 Open the quarter turn and lever
latches.
2 Release the door lock by moving a
screwdriver from top to bottom in
the groove shown.
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