DISCONNECTING SWITCH
Operation & Maintenance Manual
05
3.2 - Operating Mechanism
The opening and closing of the disconnecting switch can be
electrically or manually operated.
However, the earthing operation is manual with an option for
motorised operation.
3.2.1 - Electrical Operation
The driving force of the motor is conveyed to a set of gears and
nally to worm wheel Worm wheel rotates the mechanism main
Figure 3.2.1 - Structure Of Operating Mechanism
shaft, charging the closing spring. Towards the end of the
operation, the closing spring will be released and this released
energy drives the mechanism to rotate at high speed. This
mechanism is connected to DS main shaft through a gas tight
coupling. The driving force from the mechanism rotates the
main DS shaft which in turn moves the contact blades. At the
end of the operation, the mechanism switching is completed
with an operation sound. The switch positions (open/ close /
earth) are displayed by a mechanical ag at the front of
mechanism housing and indicating lamps are mounted on the
front door.
Motor
Main Shaft
