PP21-4-20.0A-XX-V

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Circuit Breakers

A circuit breaker is an automated device designed to detect a fault and disconnect the power supply to an electrical circuit for the safety of the occupants and property. Circuit breakers are classified according to their current rating and the type of circuit they protect. The PP21-4-20.0A-XX-V is an example of a circuit breaker used to protect against short-circuit and overload conditions.

Application Field and Working Principle

The PP21-4-20.0A-XX-V circuit breaker is designed for residential and commercial applications. This circuit breaker can be used to protect supply lines, motors, switches, and other electrical equipment from overloads, short circuits, and other overload conditions. It is available in two different types; one-pole and two-pole. The single-pole version is used for single-pole service entrances, distribution panels, and other single-pole applications. The two-pole version is used for two-pole panels, three-phase service entrances, and other two-pole applications.

The PP21-4-20.0A-XX-V is a thermal-magnetic, auto-reset breaker with trip settings that are adjustable with a calibrated adjustment knob. An indicator shows when the breaker is tripped and the reset knob must be manually operated to reset the circuit breaker. The breaker has a range of tripping points, which are adjustable. When the current or voltage on the circuit exceeds the preset trip setting, the breaker trips, disconnecting the circuit.

The PP21-4-20.0A-XX-V is built with a modular construction to provide greater flexibility in installation. The breaker can be installed in various types of panels, including flush mounted and surface mount. The breaker can be securely mounted using either the two mounting screws provided or with the included clamping system. The breaker is designed to meet UL489C, UL1077, and ANSI/NSAJ standards.

The PP21-4-20.0A-XX-V is designed for use on 120/240-volt systems up to 50 Amps. It is a very reliable and versatile circuit breaker that is UL listed for use in capable of safely and effectively supplying the necessary electrical power to many different types of loads. The PP21-4-20.0A-XX-V has a unique self-adjusting trip unit that can accurately detect short circuits and overloads, allowing it to trip in less than 1 second.

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