R21-4-15.0A-B161EV

R21-4-15.0A-B161EV circuit breakers are designed to protect circuits from over-currents and short-circuits in AC electric systems. They also provide a means for disconnecting a circuit from the electric supply in order for maintenance or troubleshooting to be carried out. The R21-4-15.0A-B161EV is an electrically operated, AC rated, miniature circuit breaker rated at 15A.

The R21-4-15.0A-B161EV is widely used in industrial and commercial applications. Typical applications include electrical control systems of elevators, air conditioners, welding machines, motors, and cranes; safety protection in solar energy systems, photovoltaic systems, and electric vehicles; as well as DC circuit protection in power distribution systems. It is also suitable for use in residential, recreational, and commercial settings.

The R21-4-15.0A-B161EV operates according to its principle of thermal-magnetic protection. It is equipped with an adjustable thermal component that reacts to a rise of temperature caused by an increase in current, and a magnetic component that reacts to a sudden increase in current, due to a short circuit. When an over-current or a short-circuit occurs, the thermal component begins to heat up, expands and operates the trip mechanism. This causes the breaker circuit to open and protect the circuit from further damage. After the fault has been diagnosed and repaired, the breaker can be manually reset to restore power to the circuit.

In order to ensure maximum safety in the application, it is always advisable to use the right Circuit Breaker for the right application. The rated current, voltage and required polarity of the breaker should always be within the guidelines of the electric circuits being protected. When correctly installed, the R21-4-15.0A-B161EV will provide reliable circuit protection that is essential for safety.