1. No human medium is required to extinguish the arc.
2. The weight of the moving contact is very low.
3. The contact has to cover a very short distance during opening.
4. The switching velocity is low.
All these reasons require very little energy for the operating mechanism of the VCB. This energy is immediately available from the relay’s interlock signal. These requirements for the operating mechanism are provided through in-built motion action or pre-loaded operating springs.
With the circuit breaker, pre-existing latches, nozzles, contact interlocking arrangements, and protective devices are provided to keep the contacts in the closed position. The operation single break type. The operating mechanism is simple and does not require any special maintenance other than normal.
The use of Vacuum Circuit Breakers offers several advantages over other types of circuit breakers:
● VCBs are known for their high reliability, with fast and efficient arc interruption capabilities.
● Due to their simple and robust design, VCBs require minimal maintenance, resulting in cost savings and increased uptime.
● As they do not use environmentally harmful gases, VCBs are considered more environmentally friendly.
● VCBs are typically more compact than other types of circuit breakers, making them suitable for applications where space is limited.
● With proper maintenance, VCBs can have a long service life, providing reliable protection for electrical systems.
● After the arc is extinguished, the contact piece rapidly deionizes, reducing the chances of the arc re-striking due to quickly restoring the dielectric strength.
● The weight of the moving parts is reduced, and the contacts need to cover less distance.
● They are cost-effective and perform better.
● There is no effect of gas composition during arcing, so they are clean from pollution.
● There is no need to fill gas or oil, and no need for any kind of auxiliary system.
● There is no risk of explosion in the enclosure.
● They are suitable for multiple operations on short circuit or load. Therefore, they are suitable for repeated operations.
● Circuit breakers create minimum disturbances and have a long service life.
● They support fast and silent operations.
● They require minimal maintenance.
● They occupy less space and can be installed at any desired location.
● There is no risk of contact oxidation in a vacuum.
● The contact resistance does not change during the working life of the VCB.
● They are suitable for copper welding cable switching and industrial load switching.
● They also have a beautiful appearance.
