Each CP Type HSN circuit breaker unit can consist of either a wheeled truck and housing or be panel mounted. The circuit breaker can be mounted on the truck together with its mechanism, controls, closing, and tripping devices. The housing contains bus bars, cable connections, isolating contacts together with control relays and metering equipment. It is normal for a number of circuit breaker units to be side-by-side to form a switchboard.

HSN CIRCUIT BREAKER PHOTOS

Housings which make up a switchboard are bolted together, while trucks remain independent, and can be readily inserted or withdrawn without disrupting the others. All trucks of a similar current rating are fully interchangeable.

• HSN MAIN INDEX: • HSN OPTIONS: • HSN DIMENSIONS:

• HSN CIRCUIT DIAGRAM: • HSN ANSI RATINGS: • HSN WEIGHTS:

Control switches and indicator lamps for each circuit breaker are mounted on the front panel of the truck. The control selector switch selects either local or remote control. The trip and close switch trips the breaker direct and either closes the breaker direct or initiates the load measuring auto-reclose sequence. The closing operation is powered by the closing solenoid which also charges the opening springs. The breaker can be closed by hand using the manual closing handle provided, but this is intended for emergency and maintenance operations only.

Step-down type housing designs are typically used in applications where the front panel must contain all metering and applicable instrumentation, or where minimal housing depth is important (such as inside traction power substations).