Opening distance of vacuum circuit breaker

The opening distance of a vacuum circuit breaker refers to the separation between the contacts when the breaker is in the open or "off" position. This distance is an important parameter that affects the performance and capability of the circuit breaker. However, the specific opening distance can vary depending on the design and specifications of the vacuum circuit breaker.

In general, the opening distance of vacuum circuit breakers is relatively small compared to other types of circuit breakers, such as air or oil circuit breakers. Vacuum circuit breakers utilize the high dielectric strength of a vacuum to extinguish the arc when the contacts are separated. The vacuum gap between the contacts is designed to be minimal, typically ranging from a few millimeters to a few centimeters.

The exact opening distance for a specific vacuum circuit breaker is determined by factors such as the voltage rating, current rating, and design requirements of the circuit breaker. Higher voltage ratings and larger current capacities may require larger opening distances to ensure effective arc interruption and insulation performance.

It's important to note that the opening distance of a vacuum circuit breaker is typically specified by the manufacturer and may vary based on the specific model and application requirements. Therefore, it is recommended to refer to the manufacturer's documentation or consult the technical specifications provided for the particular vacuum circuit breaker in question to obtain accurate information about its opening distance.