Zakład Wytwórczy Aparatów Elektrycznych Sp. z o.o.
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2.2. Housing
The housing is made of aluminum sheet, grade PA4, covered with a layer of epoxy powder paint. The door is
sealed with a silicone gasket. The housing construction provides a interior protection at IP55 level with simul-
taneous ventilation of the interior. It has been achieved by applying labyrinth seal of drive shaft's output on the
top of housing and using net-protected gland hole in the bottom of housing.
2.3. Principle of operations
Maneuvering the operating mechanism is carried out by using a lever, which is blocked in the limit positions
and secured with a padlock. Anytime throughout the operation of operating mechanism, the shaft movement
is transferred to the auxiliary contact switch, opening its normally-closed contacts, and then, when the main
shaft reaches the limit position, the contacts normally open are closed.
2.4. Climatic condtitions
Operating mechanisms are dedicated for use in outdoor switchgears in the following conditions:
a) temperature (from - 50°C to + 40°C)
b) air humidity (up to 100% at 20°C)
c) altitude (up to 1000 m)
d) wind speed (up to 30 m/s)
2.5. Nameplate
