ABB MNS-MCC, Инструкция по установке, эксплуатации и обслуживанию

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M N S - MCC
LO W VO LTAG E M OTO R CO N T R O L C EN T ER
Move a unit to the isolated position
1) Rotate the operating handle to the MOVE
position. The disconnecting means within the
unit is now in the OFF position.
2) Grasp the pulling handles and firmly withdraw
the unit. The unit will move approximately 30 mm
(1.2 in) and stop. The operating handle returns
automatically to the OFF position. If the handle
does not return to the OFF position, see
Troubleshoot Withdrawable Unit Interlock. The
unit is now in the ISOLATED position; all power
and control electrical contacts are disengaged.
Removing a unit
1) To remove a unit, rotate the operating handle to
the MOVE position.
Note:
The circuit protective device within
the unit must be turned OFF since the
operating handle must be moved through
the OFF position in order to reach the
MOVE position, preventing a unit from
being removed under load.
Pull firmly and sharply on the two pull handles on
the door. The unit should move out of the MCC
cubicle approx. 30 mm (1.2 in) and stop in the
ISOLATED position. The operating handle will
spring return to the OFF position. The unit is now
locked in place and cannot move either inward or
outward with the operating handle in the OFF
position.
In this ISOLATED position, all power and control
contacts connected via the control or power
terminals are disengaged and the unit is electrically
isolated. See (fig. 63).
2) Rotate the operating handle again to the MOVE
position and pull the unit outward sharply again.
The unit will move out of the cubicle approx. 50
mm (1.97 in) to the WITHDRAWN position and
stop. The unit is retained in the cubicle by the
thumb operated safety stop (mechanical latch)
on the lower left side of the unit.
Warning:
Do not leave the unit in the
WITHDRAWN position longer than
necessary since it is beyond its center of
gravity and prone to mechanical damage.
Notice:
Use of partially withdrawn units or
pulling handles as climbing aids will
damage the units and may break the plastic
pull handles.
3) The unit can be padlocked in this position,
preventing it from being moved.
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61
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62
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63
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64
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61 Isolated position
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62 Isolated position
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63 Isolated position
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64 Mechanical latch
mechanism