CBT-20N

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Circuit breakers are devices used to protect buildings and homes from short circuits, ground faults and overloads. This article is about the CBT-20N circuit breaker and its application fields and working principles.

Introduction to the CBT-20N circuit breaker

The CBT-20N circuit breaker is a type of trip unit manufactured by ABB, a leading global technology company. The CBT-20N is a small circuit breaker, suitable for installation in buildings as well as for industrial applications. The breaker is a single-pole, trip-free device with adjustable trip characteristics. Its rating of 20A and sensitivity to current of 10kA provide reliable and efficient protection for the power system.

Application field of the CBT-20N

The CBT-20N circuit breaker can be used in various applications, ranging from residential to commercial buildings as well as industrial systems. This circuit breaker is designed to provide protection against both overloads and short circuits in the electrical circuit. It is especially suitable for use in residential applications where the load is usually low. The breaker can also be used to protect motors, transformers, and other components in industrial systems.

Working Principle of the CBT-20N

The CBT-20N circuit breaker is a trip-free device which means that it trips automatically when it detects an overload or short circuit. The device is connected to an adjustable resistor inside the breaker, which is known as a thermostat. This thermostat has a predetermined temperature rating which, when exceeded, causes the breaker to trip. When an overload or short circuit occurs, the current in the circuit rises, resulting in increased heat and causing the thermostat to trip.

The CBT-20N also has adjustable trip characteristics, meaning that the sensitivity of the breaker can be set to a particular level. This allows the user to set the sensitivity to the most suitable level for the application. For example, in a residential application the breaker can be set to trip at lower overload and short-circuit currents.

Conclusion

The CBT-20N is a highly versatile circuit breaker which can be used in a variety of applications. Its adjustable trip characteristics make it suitable for low load circuits as well as high load industrial applications. Its 20A rating and 10kA sensitivity provide reliable protection for the electrical system.

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