239-1-2717-1

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A circuit breaker is an important component in any electrical system, as it is designed to automatically disconnect the current when an over current, under current, over voltage, or short circuit occurs. The 239-1-2717-1 circuit breaker is an industrial grade three-phase molded case circuit breaker (MCCB) that functions as a critical protection and control component of industrial machinery and equipment. It is a hard-darling, reliable device with a simple, safe and reliable operating principle.

Application Fields

The 239-1-2717-1 circuit breaker is designed for applications requiring an effective protective device and reliable control of AC motors and other electrical equipment rated three-phase for 208-415 volts and up to 30,000 AIC. It is used in a variety of industrial settings to ensure safe operation at all times. Common applications include industrial motors, transporters, crane motor and traction control systems, loaders, compressors, and electric casting.

Working Principle

The 239-1-2717-1 works according to the differential air trip mechanism principle. It utilizes pressure generated by a heat or pressure-sensitive element to operate the circuit breaker trip unit. When the pressure or heat element senses an over current, under current, over voltage, or short circuit, the pressure on the trip unit is increased and the breaker trip actuator is released. This releases the contacts inside the breaker, and the current flow is interrupted. The 239-1-2717-1 also offers adjustable trip settings for current limit/sensitivity and fault breaking capacity. This allows for more precise control, as well as greater protection against over current, under current, and short circuit conditions.

The 239-1-2717-1 can be equipped with a range of protection and control functions, such as thermal overload protection, phase fault protection, reverse phase protection, overvoltage protection, and undervoltage protection. It also features adjustable overload settings, manual reset capabilities, as well as a lockout/tagout feature. In addition to these features, it is also possible to add a field replaceable test connector to make testing and maintenance easier and faster.

The 239-1-2717-1 circuit breaker is an important component in any industrial setting, as it is both reliable and efficient. Its working principle ensures that it is able to provide effective protection and control of AC motors and other electrical equipment efficiently and safely. Its adjustable trip settings also provide a precise control of current limits, sensitivity, and fault breaking capacity. With its wide range of protection and control functions, as well as easy maintenance capabilities, it is an invaluable tool for anyone looking for a reliable, efficient and safe circuit breaker.

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