33
A
B
1
1
For the withdrawable VSC/P contactors placed in UniGear
ZS1 switchgear or PowerCube modules and for the
withdrawable VSC/PN and VSC/PNG contactors in UniGear
MCC switchgear, carry out the emergency operation with
the compartment door closed. To carry out the operation,
work towards the opening on the compartment door using
the special tool provided, fitted on the end with an 8 mm
hexagonal spanner. Apply a torque of 5 N with an operating
angle of about 30° clockwise. The point to operate in is
shown by the special plate located on the contactor shield
(see detail 1 - fig. 14b and 14c).
For fixed contactors, if the operations
are carried out with the medium voltage
protection “B” removed, pay great attention
to the moving parts.
For withdrawable contactors, do not remove
the front shield to carry out the emergency
opening operation.
In any case, if auxiliary voltage is present,
take special care not to remove the
protective shield of the stored energy
capacitor and not to touch the capacitor
itself in any way.
5.8. Emergency opening operation
The contactor is fitted with manual
emergency operation which must be carried
out by suitably qualified personnel with in-
depth knowledge of the apparatus.
The following Standards must be taken into
particular consideration during installation
and service:
– IEC 62271-1/DIN VDE 0101
– VDE 0105: Operation of electrical plants
– DIN VDE 0141: Earthing systems for
electrical installations with rated voltage
higher than 1 kV
– All the accident prevention regulations, in
force in the relative countries.
To manually open the contactor, it is necessary to work on
operating part A, consisting of a 8 mm hexagonal-head bolt,
working clockwise with a torque of about 5 Nm and at an
angle of about 30° (see fig. 14a).
If the contactor (in the fixed version) is placed inside the
switchgear, it is necessary to use a transmission made
of insulating material of suitable length, which allows safe
operation. The transmission device is to be provided by the
customer.
Fig. 14a
Fig. 14b
Fig. 14c
NEPSI.COM - Northeast Power Systems. Inc.
