A weak spring or broken valve seat. Just drain tank slightly and replace it,they are cheap and not worth fixing.
That would depend on the application as there are many uses and shapes and specifications for a vacuum breaker
A bad circuit breaker. Replace it.
There are two conditions that would cause a breaker to trip off. One is an overload of the circuit and the other is a short circuit on the circuit. The heating element within the breaker is what monitors for circuit overloads.
No, they each need their own breaker of the right amp. Neither of them would cause the breaker to trip if there was a problem.
Yea
the circuit breaker spark when it comes an over load, loss contact,but the probable cause is loss contact...and also the circuit breaker is going to be damage or destroyed.
Something wrong with it like a bad motor.
vacuum leaks
I would think not. However, if live were to come into contact with either the ground, or the neutral or both, this would cause a breaker to trip.
Blown fuse or tripped breaker. Replace the fuse or reset the breaker.
A vacuum circuit breaker has the circuit interrupting contacts inside a vacuum bottle. Without air the arc created by interrupting the circuit contains only material from the contacts. As a result the arc cannot sustain itself as well as it would if in air and the contacts will be able to handle higher currents. In an SF6 breaker the arc occurs in SF6 gas. SF6 captures free electrons from the arc quickly quenching it. In the process SF6 is broken apart but will recombine back into SF6. Some "SF6" breakers use vacuum bottles. This results in the small size of SF6 Switchgear with the advantages of vacuum breakers.
It's a noun. Use it as you would any other noun. "This geyser is the largest in Europe."