OVCD has been traditionally used with online UPS . Many UPS dealers use OVCD for protection against over voltage problems at remote sites as there it is too far and also visit expenses become too high.
One of our dealers requested us to add bypass switch to unit so that in case of problem in OVCD , they can ask the client to simple bypass the unit.
You can see the demo of 440V protection as well as bypass function in video below
MSS 