Rotary Knife Wafer Type Auxiliary Switches

Rotary auxiliary knife switches popularly known as wafer switches due to their modular & compact design are very versatile for switching a.s. as well as d.c. resistive & inductive loads. They are used as auxiliary contacts in equipment s such as MV & HV - Vacuum Circuit Breakers, Gas Circuit Breakers, Isolators & Various equipment's, where it is More..

Rotary Auxiliary Knife Switch

Conventional free AIr Thermal Current Rating (lth) 10Amp.
Operational Voltage 220 volts d.c.
Operational Current 2.0 Amp.
Utilisation Category DC113
Switching capability Inductive loads with L/R ratio (time constant) of 20mS.
Dielectric Strength 2.0 kv for 1 minute.
Insulation Resistance ≥500 Mohm
Mechanical Durability ≥1, 00, 000 operations.
Electrical Durability ≥50, 000 operations.
Tested as per IEC 62271

Application : Rotary auxiliary knife switches popularly known as wafer switches due to their modular & companct design are very versatile for switching a.s. as well as d.c. resistive & iductive loads. They are used as auxiliary contacts in equipments such as MV & HV - Vacuum Circuit Breakers, Gas Circuit Breakers, Isolators & Various equipments, where it is linked mechanically to the equipment and follows the position as per the linkage. In most cases a straight motion of main contacts is converted into rotational through links & levers to operate the switches.

Features :

Knife type of contacting making it suitable for switching d.c. loads.
Self cleaning of contacts is done during the operation.
Modular design to achieve any number of poles with minimum components.
Brass inserts used in threads to endure more than required torque while mounting.
Superior insulating material ensures electrical & mechanical stability.

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