4430.1121 Circuit Protection

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Circuit breakers are safety devices which play an important role in the electrical installations of commercial and industrial sectors, and in homes and vehicle electrical systems. The 4430.1121 is a reliable, self-contained circuit breaker providing tested, certified, and UL tested protection and switching features in a single package.

The 4430.1121 circuit breaker is designed for use in industrial and commercial applications and is used to protect an electrical circuit or equipment from over-current or overload conditions. It also prevents short circuits and other abnormal conditions on the system. By isolating the circuit when an over-current or short circuit occurs, the 4430.1121 will prevent extensive damage to the electrical system.

The 4430.1121 is a single-pole circuit breaker with a rated voltage of 277-600 volts and current ratings from 20-50 amps. The 4430.1121 circuit breaker also has a trip curve function which allows it to trip at different levels of current parameters. This feature allows the 4430.1121 to protect the circuit from various levels of overloads and different types of short circuit currents. This circuit breaker is UL certified for use in the United States and Canada as well as internationally.

The 4430.1121 is a type of thermal-magnetic circuit breaker which operates on the principle of sensing current draws and then tripping when a determined level of current is exceeded in the circuit. As a one-time thermal-magnetic circuit breaker, the 4430.1121 uses a bimetallic device as a current sensor which generates a small amount of voltage when an over-current occurs in the circuit. The voltage generated by the bimetallic device causes the magnetic coil to be energized, in turn releasing the latch which will disconnect the circuit.

The 4430.1121 circuit breaker also has an adjustable trip function which allows the user to adjust the current at which the breaker will trip. This feature is especially useful when using larger loads that require higher trip currents to protect the system. The 4430.1121 also offers high switching frequency and fast tripping characteristics which are necessary for quick disconnections in many commercial and industrial applications.

The 4430.1121 circuit breaker can be used in many different applications including HVAC systems, industrial process control, electronics, communications, and power distribution. The 4430.1121 can also be used for non-critical circuits such as lighting, pumps, and motors. It is designed for indoor use and comes with a mounting plate and wiring connections.

In conclusion, the 4430.1121 is a highly reliable, UL tested, self-contained circuit breaker that provides protection and switching features for commercial and industrial applications. It operates on the principle of sensing current draws and then tripping when a certain predetermined level of current is exceeded on the circuit. Additionally, the adjustable trip function allows the user to set the current at which the breaker will trip. The 4430.1121 is UL listed for use in the US, Canada, and internationally. This makes it a great choice for many applications including HVAC systems, industrial process control, electronic, communications, and power distribution.

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