Product Description Myers Power Products HSN Circuit Breaker offers proven performance and protection combined with ease and versatility in housing, assembly, and operation & maintenance. The HSN Circuit Breaker is available in panel mounted and truck mounted designs. Truck-mounted breakers are enclosed in a housing that contains bus bars, cable connections, isolating contacts, control relays and metering equipment that is affixed to a wheeled truck that accommodates the breaker and its mechanism, controls, and closing and tripping devices. Bolting multiple truck-mounted HSN Breakers together forms a switchboard in which the trucks remain independent, allowing each one to be easily inserted or removed without the need to disassemble the switchboard or affect the operation of the other breakers. In accordance with ANSI standards, all trucks of a similar current rating are fully interchangeable. 
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HSN Circuit Breaker