Voltage Spike Protection

Hi

I recently repaired my ups , which charger was burnt due to voltage spike, at that time I was receiving 150v to 220V, my ups run on 220v and it can care of low voltage but not spikes, when charger burnt, voltage was fluctuating from 150 to 180 in neno seconds.

So I need any device or circuit breaker or anything, if it happens again, it can cut the power to ups and when fluctuation end then It can restore power to ups again.

Thanks

There are commercial spike arrestors but the cheaper ones are a joke. A good one will have a varister and a PI filter (capacitors and a choke).

Also google "VDR" and "Zenamics".
Frank

Can you please tell me this things are good for my problem:
https://www.alibaba.com/trade/searc...uct_en&CatId=&SearchText=voltage+spike+switch

What makes you think it was a spike? Hard-running a
converter at low line puts it in an input-current-overstress
region of operation unless unvervoltage lockout shuts it
down. I've seen stuff burn up from that. You evidently
have a poor power quality situation. Rapidly changing
VIN can also stress filter components. Only a teardown
and finding the damaged piece(s) and determining the
failure mode would tell you for sure what the mechanism
is, and lead to the mitigation approach.

If input power quality is really bad, then you may want
to come up with a solution similar to what power-factor-
correction guys do; a wide input range boost converter
to make a stable DC from an unstable AC, and then the
business of the UPS's battery charge management and
AC output inverter.

A "canned" UPS was designed to some input range, and
you get what you get. Operating at -32% of nominal line
seems like more than I'd sign up for, if my defined market
was one with a stable power grid (like US or EU office &
industrial).