219-3-1-66-7-5-7.5

Circuit Breakers

Circuit breakers are an essential part of any electrical system. They are designed to detect overloads or short circuits and immediately cut off the power supply when they occur. This prevents damage to electrical equipment and potential injury or death to people that could occur from such an incident. Hence, circuit breakers are a vital safety feature of any electrical system.

The 219-3-1-66-7-5-7.5 application field is mostly applicable to appliance circuit power protective and distribution circuit breaker system, which are mainly used as electricity supply and equipment protection device. This series of circuit breaker is characterized by small body size, light weight, superior protection and reliability, and is widely used in civil household and similar places of wiring system.

Working Principle

Circuit breakers work by means of a current transformer that is designed to measure the current in the circuit and then activate the circuit breaker when a specified current is exceeded. When power is supplied to a circuit breaker its contacts will be in contact closing the circuit, if current exceeds the specified value then the circuit breaker will trip and the contacts will open, disconnecting the current supply to the circuit. The circuit breaker can then be reset manually after the issue has been resolved and it will draw a small current to determine whether either the overload or short circuit has been resolved.

This type of circuit breaker uses an electromagnetic coil to pull the contacts apart when the current is exceeded, and at the same time it will trip a small flag that will indicate the type of fault caused the trip. It will also provide a manual reset button that needs to be pressed to reset the breaker and enable it to close the circuit again.

Circuit breakers are a critical part of any electrical system, and they provide the necessary protection against overloads and short circuits. The 219-3-1-66-7-5-7.5 application field and working principle shown are all features that make them an essential part of any electrical system.