LELK1-31818-40

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Circuit Breakers: LELK1-31818-40 Application Field and Working Principle

Circuit breakers are electrical devices used to protect circuits from overload by breaking the circuit automatically. The LELK1-31818-40 is a 3 pole three thousand amp circuit breaker custom manufactured by Westinghouse. It is typically used in high power distribution systems and for medium voltage industrial installations.

The LELK1-31818-40 circuit breaker consists of three separate, non-interchangeable metal breaking elements, each of which is rated for one thousand amps. These elements are connected together in a semicircular arc shape by a heavy duty electrical cable and then housed in a metal box. The breaker cover is designed to provide a tight seal around the metal elements, preventing any electrical energy from escaping to the environment.

The basic working principle of the LELK1-31818-40 is straightforward. When a circuit is overloaded, the current in the circuit rises higher than its designed capacity, creating an electrical arc. This arc causes a spark that trips the breaker, interrupting the current and preventing further damage to the circuit or other critical components.

The breaker also has several safety features built-in for added protection. Firstly, the three separate breaking elements act as a back-up, ensuring that even if one element experiences extreme overload, the other two will remain intact and the circuit will remain functioning. Secondly, an arc-resistant seal is built into the case to contain sparks and limit electromagnetic interference from the circuit.

In addition, the LELK1-31818-40 contains a thermal overload system to detect changes in ambient conditions. If the temperature of the surroundings increases, the breaker will automatically trip, preventing any further damage to the circuit. Finally, the breaker has a mechanical interlock feature that prevents it from being opened while the circuit is still energized.

The LELK1-31818-40 is an exceptionally robust and reliable circuit breaker, designed to provide maximum protection to industrial and residential electrical installations. Its combination of safety features, overload protection and thermal overload system make it an ideal choice for applications where high power currents are regularly used.

In conclusion, the LELK1-31818-40 is a reliable, robust and secure circuit breaker that provides a substantial level of protection against electrical overloads. Its combination of safety features, overload protection and thermal overload system make it ideal for use in industrial and residential high power installations.

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