Checks for Vacumn Circuit Breakers

What does the maker of said breakers say regarding operation and maintenance of their equipment?

There must be hundreds of sites on the web with general O&M guidelines.

Do a search for "operation and Maintenance of Vacuum circuit breakers" and let us know what you find.

That'll save us from having to do your legwork.

Good Luck.

Yes there are, but you haven't even told us the make and model number. If this piece of equipment is new to you or your client, then the only source to be trusted is the original equipment manufacturer's literature/tech support team.

Not all VCB's (Vacuum Circuit Breakers) are the same, there are even differences within one manufacturer's product line. Performing the checks in the wrong sequence by untrained personnel without the proper instructions/training is a formula for, at a minimum, equipment damage, and at a maximum, loss of life. Get the proper documentation/training, your client will thank you.