4439.0002 Circuit Protection

Series:	TA45
Part Status:	Active
Lead Free Status / RoHS Status:	--
Breaker Type:	Thermal
Moisture Sensitivity Level (MSL):	--
Current Rating:	20A
Voltage Rating - AC:	240V
Voltage Rating - DC:	60V
Number of Poles:	2
Actuator Type:	Rocker
Illumination:	Clear
Illumination Voltage (Nominal):	110V
Mounting Type:	Panel Mount

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Circuit Breakers

Introduction

Circuit breakers are devices that control and protect electrical circuits by interrupting the electric path when current is too high. In industrial applications, circuit breakers can help protect workers by providing a source of safety. Types of circuit breakers include air, induction, gas, electric, magnetic and motorized. This article will focus on the 4439.0002 application field and working principle of circuit breakers.

4439.0002 Application Field and Working Principle

The 4439.0002 circuit breaker is designed to provide reliable protection of three-phase, four-wire, low-voltage and medium-voltage electrical systems. It is used in a range of industries including power generation, power transmission & distribution, industry, marine, and transportation.The circuit breaker consists of two main parts: the main contacts and the arc-chamber. The main contacts interupt the current flow when an overloaded circuit is detected, preventing further damage to the circuit. The arc-chamber is filled with a gas, usually sulfur hexafluoride (SF6), which passes over the arc created when the contacts open, quickly extinguishing the arc and preventing further damage.The 4439.0002 circuit breaker utilizes a three-stage operation that allows it to determine when a circuit is overloaded and provide accurate protection. During the first stage, known as the pre-alarm stage, the breaker monitors the current flow in the circuit. If the current exceeds the predetermined threshold, the breaker trips, cutting the current flow and preventing further damage.During the second stage, known as the check phase, the breaker measures the fault current in the circuit. If the fault current is lower than the trip threshold, the breaker re-closes the circuit and allows normal operation to resume.The third and final stage, known as the lockout stage, is used to prevent the breaker from re-closing on an already damaged circuit. During this stage, the breaker provides a mechanical lock-out and cannot be manually reset until the circuit has been inspected and repaired.

Conclusion

The 4439.0002 circuit breaker provides reliable protection for low and medium-voltage circuits, ensuring safety and reliability. It utilizes a three-stage operation to accurately determine when a circuit is overloaded and prevent further damage. With its efficient and safe operation, the 4439.0002 circuit breaker is a valuable tool for any industrial application.

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