I am aware of several switchgear manufacturers that have developed, an
I am aware of several switchgear manufacturers that have developed, an
(OP)
I am aware of several switchgear manufacturers that have developed, and are marketing, mechanical "zero-volt closing" capacitor switches. they claim that this eliminates transients when energizing capacitors. These switches energize capacitors on the zero-volt crossing of the line voltage.
My question is:
How will these switches react to energizing capacitors that have residual voltage on them from "zero-current" switch openings, which is a natural occurence?
It is my understanding that zero-volt closing is only practical when energizing completely de-energized capacitors.
My question is:
How will these switches react to energizing capacitors that have residual voltage on them from "zero-current" switch openings, which is a natural occurence?
It is my understanding that zero-volt closing is only practical when energizing completely de-energized capacitors.






RE: I am aware of several switchgear manufacturers that have developed, an
Otherwise you are right, the residual energy could create some voltage transients. That is why it is so important to verify that those resistors are connected, or even better, built into the capacitor.
Hope this was helpful !
RE: I am aware of several switchgear manufacturers that have developed, an