CB255-40

Series:	CB255
Part Status:	Active
Lead Free Status / RoHS Status:	--
Breaker Type:	Thermal
Moisture Sensitivity Level (MSL):	--
Current Rating:	40A
Voltage Rating - DC:	32V
Number of Poles:	1
Actuator Type:	Push to Reset
Illumination:	--
Illumination Voltage (Nominal):	--
Mounting Type:	Panel Mount

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CB255-40 Circuit Breaker: Application Field and Working Principle

Circuit breakers are used to protect electrical components and electronic devices from damage that can be caused by short circuits or overloading. The CB255-40 circuit breaker is a type of circuit breaker used to protect motors and other high amperage applications. This article aims to discuss the application field and working principle of the CB255-40 circuit breaker.The CB255-40 circuit breaker is used for the protection of motors against over current and is designed to break high amperage of up to 4000A. The circuit breaker can be used for either AC or DC applications, including marine, industrial and off-shore applications. The CB255-40 circuit breaker is a 3-pole, thermal-magnetic, a.c. manually operated circuit breaker with trip characteristics based on a standard IEC 60947-2. The circuit breaker is also UL 1077 certified, making it suitable for international installation requirements.To understand how the CB255-40 circuit breaker works, one must first understand the difference between thermal and magnetic protection. Thermal protection works by monitoring the current flowing through the circuit and when the current exceeds the maximum rating the breaker will trip. Magnetic protection works by monitoring the flow of current through a magnetic coil, when the flow of current is interrupted the breaker will trip. The CB255-40 circuit breaker has two main parts: the main switch and the thermal overload device. The main switch is responsible for switching the circuit breaker on and off and the thermal overload device monitors the current flowing in the circuit and trips the main switch when the current reaches the maximum rated value.The CB255-40 circuit breaker is equipped with an adjustable overload relay that is used to trip the switch when an overload occurs. It can be adjusted to trip at higher or lower amperage; this allows the user to customize the circuit breaker to better protect the motor or appliance.The circuit breaker can also be connected to a thermal sensor which measures the temperature of the motor or equipment. The thermal sensor will trip the breaker in case of an over temperature to further protect the motor or equipment.In addition, the CB255-40 circuit breaker is equipped with a built-in manual reset button that can be used to reset the circuit breaker after a trip has occurred. This is useful in case of a false trip due to an external fault or a power surge as the user can manually reset the circuit breaker without having to replace it or reset it from the power source.In conclusion, the CB255-40 circuit breaker is an advanced, reliable, and economical solution for protecting motors, appliances, and other large electrical loads from overloads and power surges. It\'s adjustable overload relay and thermal sensor makes it ideal for customized protection and its manual reset button and UL certification make it suitable for international installation requirements.

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