2907505

Series:	TMC 8
Part Status:	Active
Lead Free Status / RoHS Status:	--
Breaker Type:	Thermal Magnetic
Current Rating:	4A
Voltage Rating - AC:	480V
Voltage Rating - DC:	125V
Number of Poles:	2
Actuator Type:	Lever
Illumination:	--
Illumination Voltage (Nominal):	--
Mounting Type:	DIN Rail

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Circuit Breakers

A circuit breaker is a device used to protect equipment and personnel from over-currents and short-circuits. It applies its switching mechanism to cut off the power supply to the circuit if the current drawn exceeds a preset threshold. This prevents the system from being overloaded or damaged and ensures the safety of personnel. The 2907505 application field and working principle are discussed below.

Applications

Circuit breakers are commonly used in the industrial, commercial and residential sectors to provide protection against over-currents in electronic and electrical systems. They can be installed to protect motor circuits, control circuits, lighting systems, air-conditioning systems, refrigeration systems, and fire alarm systems, among others. Generally, the application of a circuit breaker is dependent upon its rating, which indicates the voltage and current capability of the device.

Working Principles

The working principle of a circuit breaker is relatively simple. It utilizes an over-current protection device (OCPD) to provide the switching mechanism, which together with the secondary protection mechanisms form the complete protection system. When the current flow in a circuit exceeds the nominal value, the OCPD trips the circuit breaker, thus interrupting the current flow.When the current starts to exceed the rated current, the OCPD reacts by heating a contact, which in turn trips the circuit breaker. The contact then deforms and opens the circuit, allowing the current to dissipate safely. Once the current is brought down to safe levels, the contact cools and the circuit breaker can be reset.The resetting process involves manually resetting the OCPD and ensuring that the contact has cooled. It is important to note that circuit breakers can only be reset a limited number of times before they need to be replaced.

Conclusion

The 2907505 application field and working principles provide a brief overview of the use and function of circuit breakers. These devices are an essential component in the protection of personnel and equipment from over-currents and short-circuits. By understanding the principles behind the operation of circuit breakers, it is possible to ensure that a comprehensive protection system is in place.

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