2907200

Circuit Breakers

A circuit breaker is a protective device installed within electrical equipment to protect it against sudden abnormal or rapid increases of amperage or voltage. When an overload or short circuit occurs, the breaker interrupts the electrical current, cutting off power to the equipment. This action, however, is not permanent, as the breaker can be reset, allowing restored power to resume.

The 2907200 circuit breaker is a thermal-magnetic breaker which offers both thermal and magnetic protection. It is suitable for use in 3-phase AC circuits in residential buildings, restaurants, offices, and other commercial establishments. The breaker includes a current limiting feature, which restricts the maximum current that can flow through the device to a safe level during abnormal operation. It can be used as a branch protection device or as a main-line protection device.

2907200 Application Field and Working Principle

The 2907200 circuit breaker is designed for use in standard AC circuits in residential and commercial installations with a wide variety of loads. It is suitable for use in distribution panels and switchboards with molded case circuit breakers. The breaker boasts a wide range of adjustable configurations, making it applicable for many different applications.

The 2907200 circuit breaker has two levels of protection, a thermal device as well as a magnetic trip unit. The thermal device protects against continuous overloads while the magnetic trip unit works to protect against short circuits.

The thermal protection device is composed of a bimetallic strip that is shaped like the letter U. When the current passing through the circuit goes over the bimetallic strip’s rated amperage, the two metals expand differently, causing the strip to bend, which ultimately trips the breaker.

The magnetic protection device utilizes an electromagnet, which is located between the breaker’s line and load terminals. During a short circuit, the electromagnet acts as a ‘solenoid’ and rapidly de-energizes the breaker, thus cutting off the flow of electricity and protecting the circuit. This process is incredibly fast, taking less than 0.0016 seconds (1.6ms) to trip the breaker.

The adjustable configurations of the 2907200 circuit breaker include adjustable short-circuit and overload settings, as well as thermal delay settings. These adjustable settings can be adjusted to provide protection for equipment against both overloads and short circuits.

In addition to adjustable configurations, the 2907200 circuit breaker boasts numerous features, including an isolator switch and an optional manual reset. The isolator switch allows the user to disconnect the breaker from the electrical circuit without interrupting the power source. The optional manual reset feature allows the breaker to be manually reset if manual resetting is desired; this feature is helpful in the event of an accidental trip.

The 2907200 circuit breaker is a compact, efficient device that offers reliable protection against both overloads and short circuits. It is made of high-quality materials and is designed to meet the safety standards set by UL, CSA, and other ratings agencies. The adjustable configurations of the breaker allow it to be customized for many types of applications and provide reliable, efficient protection for equipment.