Demanding applications demand Joslyn Clark reliability

Joslyn Clark ControlsOur AC and DC contactors, medium voltage controllers, medium voltage vacuum contactors and combination starters are used in some of the most extreme industrial environments in the world. Just a few of the industries and applications our products are used in include water and oil pumping, coal and metal mining, compressors, HVAC, industrial electric furnace control, capacitor switching, rock crushing, crane control and lighting control.

The complete line of Joslyn Clark diesel and electric fire pump controllers are known the world-over for their rugged, heavy-duty design, and for their unparalleled performance in enhancing the life safety and fire protection requirements of a wide variety of commercial and industry settings.

Manufactured with a combination of solid state electronics and relay logic, our controllers meet or exceed all requirements of the National Fire Protection Association, Standard NFPA 20, are listed by the Underwriters Laboratories, Inc., and are approved by the Factory Mutual System. 

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Technical Articles

Current Chopping a Simple Explanation, and Calculations to Determine Transient Voltages When Using Vacuum Interrupters (Switches) Current chopping is a term that came to our vocabulary with the advent of vacuum switching which was commercially started back in the 1950's. Earlier switching means in air or oil are in terms of... (View Full Article)