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Promoted item:1 NEW SIEMENS QJ23B200 200 AMP 3 POLE 240 VAC CIRCUIT BREAKER

1 NEW SIEMENS QJ23B200 200 AMP 3 POLE 240 VAC CIRCUIT BREAKER

  • WE HAVE 20 AVAILABLE!!!!!
  • Condition
  • New: Other (see details)
  • Time left
  • 13d 18h 45m
  • Brand
  • Siemens
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    The item is listed as a Top Rated Plus item
  • US $98.50
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  • Quantity 10+Available
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About Circuit Breaker

The circuit breaker is an essential safety device which can prevent fires and problems resulting from faulty wiring or equipment malfunction. A circuit breaker is a simple mechanism that cuts the electrical power whenever excessive current flows through the wiring or a short occurs. Household 110-volt circuits usually require a circuit breaker rated between 15 and 20 amperes. The circuit breaker is often confused with the fuse, which can perform a similar function. However, as opposed to the fuse, which melts when its rating is exceeded, the circuit breaker is reusable. It can be manually or automatically reset once the problem is corrected. Many leading American and international electric and electronic corporations make circuit breakers. Their products are often categorized by the number of poles or the amperage rating. It is possible to find low-voltage circuit breakers with rated currents as low as under 15 amperes and as high as over 3,000 amperes. Thermal, magnetic, thermal-magnetic, and electronic are common circuit breaker designs.Low-voltage circuit breakers can usually be found in main electrical panels in homes and buildings and is also common in commercial and light-industrial applications. Available types include the miniature, moulded case, air, and vacuum circuit breakers. Larger, high-voltage models are routinely available up to 765 kV AC. High-voltage circuit breakers are classified according to the medium employed to extinguish the arc through which the current is carried after contacts are separated. Common ones include oil-filled, air blast, and sulfur hexafluoride. They are mainly used in generators, electrical substations and with transmission and distribution lines.