LEGBX66-1REC4-39503-20-V

Series:	LEG
Part Status:	Active
Lead Free Status / RoHS Status:	--
Breaker Type:	Magnetic (Hydraulic Delay)
Moisture Sensitivity Level (MSL):	--
Current Rating:	--
Number of Poles:	2
Actuator Type:	Rocker
Illumination:	--
Illumination Voltage (Nominal):	--
Mounting Type:	Panel Mount

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Introduction

Circuit breakers are vital components in electrical systems. They are designed to shut off the flow of electricity in the event of an overload or a short circuit. The LEGBX66-1REC4-39503-20-V is one such device. In this article, we’ll take a closer look at the application field and working principle of this specific type of circuit breaker.

Application Field

The LEGBX66-1REC4-39503-20-V circuit breaker is designed for both protecting and controlling circuits with a voltage rating at up to 1000V AC or 1500V DC. This breaker is suitable for many different applications including lighting, motors, HVAC systems, transformers, and more.It is also moisture-resistant, making it ideal for use in wet or damp environments. The LEGBX66-1REC4-39503-20-V is rated for short circuit current of 3000A and a maximum continuous current of 400A. Its rated frequency is 50/60Hz.The LEGBX66-1REC4-39503-20-V meets the requirements of UL 1077 supplemental protection, CSA certified and, it is an IEC 60947-2 compliant device.

Working Principle

The LEGBX66-1REC4-39503-20-V circuit breaker features a mechanical trip unit which continuously tracks and measures the load current in the circuit. In the event of an overload or a short circuit, the breaker will trip, which will cut off the flow of electricity and cause the circuit to shut off.The trip unit contains several types of components, such as a thermal element, a bi-metallic thermal element, and a magnetic element. When a current overload occurs, the thermal element will expand and cause the breaker to trip. The bi-metallic element will deform as a result of increased temperature due to the overload and also contribute to the breaker’s tripping action.The magnetic element is designed to detect fault currents, essentially making the breaker sensitive to changes in the current, which are then interpreted as overloads or short circuits. When the current detected by the magnetic element exceeds the set trip points, the breaker trips and the circuit is shut off.

Conclusion

The LEGBX66-1REC4-39503-20-V circuit breaker is a reliable and effective device for protecting circuits from overloads and short circuits. It is suitable for a wide range of applications, is moisture resistant, and is certified for safety. Its trip unit, composed of a thermal, bi-metallic, and magnetic element, constantly monitors the electrical load and trips the breaker when necessary.

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