Circuit Breakers

A circuit breaker is an important device designed to protect electrical circuits from damage caused by overload or short circuit conditions. Circuit breakers are classified according to their operating voltage, current ratings, number of poles, and fan power. The PR11-1-20.0A-XX-T circuit breaker is a three pole, 600 VAC rated, fan-cooled device designed to protect commercial and industrial equipment against overcurrent.

Application Field

The PR11-1-20.0A-XX-T circuit breaker is used in a wide range of locations, including restaurants, malls, banks, schools, commercial buildings, and industrial plants. The device can be used as a main switch or branch circuit breaker to provide protection against fire, explosion, and other hazards. The PR11-1-20.0A-XX-T circuit breaker is an UL 1053 listed device and is suitable for indoor and outdoor applications, provided it is mounted in an enclosure suitable for the environment. It is also suitable for use in ducts and conduit, and in control panels.

Working Principle

The PR11-1-20.0A-XX-T circuit breaker uses a thermal-magnetic tripping mechanism to provide reliable overcurrent protection. When an overload or short circuit occurs, the PR11-1-20.0A-XX-T circuit breaker senses the increase in current and trips the circuit, thereby preventing damage to the connected electrical equipment. The tripping mechanism includes two sets of contacts: one set that trips the circuit breaker at the rated current limit and another set that trips the circuit breaker at the rated short circuit current limit. The two sets of contacts are connected in series and are energized by a handle. When the handle is in the "on" position, the contacts are held closed by a magnet, and the circuit breaker remains in the "on" position. When an overload or short circuit occurs, the magnet is no longer able to hold the contacts together, and the circuit breaker trips. The device also features a manual reset button, which can be used to reset the circuit breaker when the overload or short circuit has been cleared.

The PR11-1-20.0A-XX-T circuit breaker provides reliable protection against overload and short circuit conditions. Its UL 1053 listing makes it suitable for both indoor and outdoor installations. The device is designed for use with a variety of loads, including resistive, inductive, and capacitive loads. With its dependable construction and thermal-magnetic tripping mechanism, the PR11-1-20.0A-XX-T circuit breaker is an ideal choice for commercial and industrial applications.