Products
-> Ancilliaries
-> Isolators and Switches
Isolation Switches
Isolators are switching devices that create a break
in the circuit that will withstand a minimum voltage
breakdown to ensure the output remains isolated at all
times from the input of the switch in order to ensure
the output can not become live due to a breakdown fault
Isolators can be supplied in two standard formats,
‘Panel Mounting’ and ‘Door Interlocking’.
Panel Mounting
Here the isolation switch is mounted directly on an
external panel so that the switching handle which is
an integral part of the unit is accessible from outside
the transformer enclosure. The panel to which it is
mounted does not open to allow access to the inside
of the enclosure. The isolator simply provides a means
of disconnecting the supply to the output from the transformer.
Door Interlocking
Here the switch body and the switching handle are separate
units that are linked by a shaft. The handle is mounted
on a panel that can be opened to allow access to the
inside of the transformer enclosure. The switching body
is mounted internally within the enclosure with the
shaft aligned to mate with the handle when the access
panel is closed. When in the ‘ON’ position
the shaft can not be released by the handle so the door
can not be opened with the system live.
Both types of isolator can be supplied with padlockable
catches to ensure that the isolator can not be switched
without the keyholders authority e.g. during service
work the isolator can be locked off until the work has
been completed and can not be made live during the service
General Purpose Switching
In addition to Isolation Switches we can offer general
purpose switches fitted to perform a variety of functions.
While isolators are restricted to a simple ‘ON
/ OFF’ function switches in general can be used
to perform more varied functions
E.g.
- Emergency Stop Switches
- Start Button Switches
- Selector Switches for meters
- Off-load Tap Changer Switches
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Push Button Switches |
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Multi Position
Selector Switch |
Tap Changer Switch |
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