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Circuit Breakers

A circuit breaker is an electrical device designed to protect an electrical circuit from damage caused by overload or short circuit. It consists of a switching device that can switch off the power supply when too much current is detected. The 4230-T110-K0BU-4A is one type of circuit breaker that is frequently used in industrial applications. This article will discuss the application field and working principle of the 4230-T110-K0BU-4A.

Application Field of the 4230-T110-K0BU-4A

The 4230-T110-K0BU-4A is a three-phase, air-break circuit breaker rated for 600 volts and 125 amps for use in areas designated as Class I Division 2 hazardous locations, per UL 886. These areas are characterized by the presence of flammable gasses, vapors, liquids, or combustible dusts in low concentrations over an extended period of time. This type of circuit breaker is designed to help protect electrical equipment and wiring from damage due to overvoltage, overloads, or short circuits in these hazardous locations. It can also be used to trip the power supply to associated equipment in the event of an emergency.

Working Principle of the 4230-T110-K0BU-4A

The 4230-T110-K0BU-4A circuit breaker works on the principle of thermal overload protection. It is designed with an internal trip device that senses a rise in the current flow in the circuit and triggers the breaker to open, thus breaking the circuit and preventing further current overload. This trip device is typically a bimetallic strip that is heated as the current passes through it. When a certain current is exceeded, the strip bends and trips the breaker open.

The 4230-T110-K0BU-4A circuit breaker is also designed with an over-temperature protection feature. This feature is a second internal trip device that protects the circuit from extremely high temperatures that can cause the bimetallic strip to fail. In the event of an over-temperature situation, the device trips the breaker before damage is caused.

Conclusion

The 4230-T110-K0BU-4A is a three-phase, air-break circuit breaker that is rated for use in Class I Division 2 hazardous locations. It is designed to protect electrical equipment from damage due to overvoltages, overloads, and short circuits. It operates on the principle of thermal overload protection, with an internal trip device that triggers the breaker to open in the event of an overload, and an over-temperature protection feature that trips the breaker in the event of an extreme temperature overload.

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