I understand withstand voltage test is to check the insulation of a product, for example between a live metal part (AC input terminal block) and a dead metal part.
I saw this specification in one of our products. It says withstand voltage between same polarity of output relay is 1000 Vac.
The product has two relays. Let's name the output of relay 1 as COM1 and NO1 and output of relay 2 as COM2 and NO2. All relay contacts are connected to an output terminal block (exposed metals) via PCB routes. Where is this 1000 V applied and what does "between same polarity mean"?
Does it mean between NO1 and NO2 or COM1 and COM2? It doesn't make sense to me though because the contacts of relay 1 is completely isolated to relay 2 output contacts in the first place.
Unfortunately, I couldn't use "withstand" in the tags. Sorry about that.