Noticed before when swapping the Jaycar "crappy" power meter to different sockets that the *plug* of the UPS gave me a bit of a buzz when it was chirping away in backup/no mains mode.
Obviously it's not going to be backfeeding its full inverter power into the socket that it's plugged into, otherwise it would be attempting to power everything (other devices on the power board, the rest of the house wiring, ...)
Just curious what it may be, whether it's common or a cause for concern.
Suppression capacitor(s) discharging into your hand?
Chris
you can fix this by adding another relay on the mains side, fined a relay that runs on a 240 volt winding from your electircal outlet there not cheep sometimes, connect the mains to the relay that added on its coil and to the open contacts of the relay and connect the moving contacts to were the mains go on the UPS board. so when the mains gos off it cuts the the mains input to your UPS, no leaks. that leak can trip the safety switch on your house.
Normal and doubtless within IEC limits.
Graham
You got it.
Graham
Don't bother. He'll be breaking electrical code already.
Graham
Have something to add? Share your thoughts — no account required.
Ask the community — no account required