Uv release coil in circuit breaker
A UV release coil, also known as a UV trip coil or UV release mechanism, is a critical component in a circuit breaker that helps to ensure the safe and reliable operation of the breaker.
Here's how it works:
What is a UV release coil?
A UV release coil is a spring-loaded mechanism that is designed to release the trip mechanism of a circuit breaker when the voltage across the breaker's contacts exceeds a certain threshold, typically around 30-40% of the rated voltage. This threshold is known as the "undervoltage" (UV) level.
How does it work?
When the voltage across the breaker's contacts drops below the UV level, the UV release coil is triggered, which causes the trip mechanism to release. This allows the breaker to trip and disconnect the power supply to the circuit, preventing damage to equipment or electrical shock.
Why is it important?
The UV release coil is important for several reasons:
- Safety: It helps to prevent electrical shock or equipment damage by disconnecting the power supply when the voltage drops below a safe level.
- Reliability: It ensures that the circuit breaker operates reliably and consistently, even in the presence of voltage fluctuations or drops.
- Compliance: Many electrical codes and standards, such as IEEE and IEC, require circuit breakers to have a UV release mechanism to ensure safe and reliable operation.
Types of UV release coils
There are two main types of UV release coils:
- Mechanical UV release coil: This type of coil uses a mechanical linkage to release the trip mechanism when the voltage drops below the UV level.
- Electromagnetic UV release coil: This type of coil uses an electromagnetic mechanism to release the trip mechanism when the voltage drops below the UV level.
In summary, the UV release coil is a critical component in a circuit breaker that helps to ensure safe and reliable operation by releasing the trip mechanism when the voltage drops below a certain threshold.