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LOAD BREAK SWITCHES

UNIQUE CONTACT MECHANISM
Efficient Switching & Long life
Switch Disconnectors 200A and above employ a unique Knife Contact 1
Mechanism which utilises the magnetic attraction principle on the moving
contacts. As current increases, the contact force automatically increases,
ensuring optimum contact at all times, high making and breaking capacity up
to 690V and low temperature rise leading to a long electrical life.
The fixed contact design results in separate arcing and current carrying
surfaces. It again ensures that the current carrying surface remains unaffected
by arcing, maintaining the same contact pressure and enhancing electrical
life. The special shape of the fixed contact also helps to blow the arc into the
arc-chute where it is swiftly extinguished under controlled conditions, safely. LOAD BREAK SWITCHES
With every switching cycle, the knife contacts clean themselves. This makes
them perfectly suited for adverse conditions in general and for high pollution
and corrosive conditions as in Chemical Plants, Cement Plants, Steel Plants,
etc., including applications such as motors and capacitor switching.

SWITCH CONSTRUCTION
Safety Built-in
C&S designers introduced the concept of protection in case of "welded
contacts" by positive break forced opening of the contacts. In the event of high
currents and protection systems failing to operate, leading to welding of
contacts, the handle will not turn beyond 45 from the ON position, clearly
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indicating that the contacts are welded.
Convenience of contact visibility permits contact position inspection, without
removing the switch from installation, thus enhancing reliability and saving
time.

The self-extinguishing fibre glass re-inforced insulated body of each pole has
a very high tracking index. The large gap between the fixed and moving
contacts in the OFF position, makes them suitable for isolation.
Visible Contacts Door interlocking prevents the door opening with the switch in the ON
position, guarding the operator against an accidental mishap. As a standard,
up to 3 padlocks can be utilised in the OFF position to prevent closing the
circuit during maintenance work. The interlock can be defeated with a minor
modification where required.

ACCESSORIES
Flexibility to suit Application
The accessory range increases the switches suitability for diverse application,
enhances operational flexibility and improves installation safety.
The handle mounting kit enables the switch to be mounted completely inside
an enclosure so that it can be operated only after opening the door.

The auxiliary contacts permit electrical interlocking, remote indication and
alarms. The key interlock components enable interlocking with different
categories of products.
Shrouds encase the terminals so that no falling hardware may get embedded
between the terminals resulting in flashovers. External changeover mechanisms are
available for both switch disconnectors and switch fuse disconnectors.

IPD INDUSTRIAL PRODUCTS Phone: 1300 556 601 www.ipdgroup.com.au