220 V Industrial Rotary Knife Switches For On Load D.c.

Rotary knife switches are modular & compact in design and are very versatile for switching a.c. as well as d.c. resistive & inductive loads. They are used as Control switches in Control Panels and equipment such as MV & HV - Vacuum Circuit Breakers, Gas Circuit Breakers, On Load Tap Changers and Motor control panels. The switches are used as Mains switch or for instrument selector i.e. Ammeter selector & Voltmeter selector switches. These switches offer advantage of having quick make and break contacts for on load d.c. applications.

Features:

Knife type of contacting making it suitable for switching on load d.c.
Self cleaning of contacts is done during the operation.
Modular design to achieve any number of poles with minimum components.
Specially designed operator independent quick make/break mechanism.
Superior insulating material ensures electricals & mechanical stability.

Specification:

Conventional free AIr Thermal Current Rating (lth):16 Amp.
Utilisation Category: DC13
Switching capacity: Inductive loads with L/R ratio (time constant) of 20mS
Dielectric Strength: 2.0 kv for 1 minute
Insulation Resistance: > 500 Mohm
Mechanical Durability: > 5,00,000 operations
Electrical Durability: > 100,000 operations