203-2-1-64F-203-E-1-1

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A circuit breaker is a protective device utilized to prevent damage caused by electrical shock or overloads. The 203-2-1-64F-203-E-1-1 circuit breaker is commonly found in industrial, commercial and residential applications. It is a general purpose circuit breaker and is designed to meet the requirements of UL-489, for Branch Circuit Protectors.

The 203-2-1-64F-203-E-1-1 circuit breaker is equipped with a magnetic or thermal-magnetic trip unit. The magnetic trip units are typically used with circuit breakers that have an adjustable trip setting, allowing the user to select a trip point within a given range. This magnetic trip unit uses a bimetallic strip that bends when excessive current passes through it. This bends opens the contacts of the circuit breaker and breaks the circuit, effectively preventing further damage.

The thermal-magnetic trip unit is used on circuit breakers to prevent damage caused by sustained over-currents. This type of trip unit combines a thermal portion with the magnetic type system. Once the thermal portion senses a sustained over-current, it trips the breaker to open the contacts. A bimetallic strip is used to detect the sustained current and is connected to a thermally sensitive element, known as the trip coil. When the current exceeds the set trip point, the thermal element trips the circuit, thus preventing damage.

The 203-2-1-64F-203-E-1-1 circuit breaker is used in applications such as small motor control, lighting control and general purpose circuits. It is suitable for applications such as industrial control, residential and commercial switches, and service entrance rated electrical panels. The 203-2-1-64F-203-E-1-1 circuit breaker is also available in rated short time and instantaneous trip units and a wide variety of mounting styles to meet a variety of applications. It has a high breaking capacity and a thermal memory trip to ensure that the breaker reliably trips under fault conditions.

Most 203-2-1-64F-203-E-1-1 circuit breakers are UL-listed and are tested for proper operation. This UL listing ensures that all components meet the safety requirements for circuit breakers. In addition, the circuit breakers are designed and provided with a trip-free response and are constructed to withstand high short-term current and voltage surges.

The overall working principle of a 203-2-1-64F-203-E-1-1 circuit breaker is that it prevents damage by either tripping on an adjustable magnetic trip unit when excessive current passes through it, or by tripping on thermal-magnetic trip units when sustained over-currents are detected. This way it provides protection against electrical shock and electrical overloads.

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