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essi avatar image
essi asked

Dealing with power surges on low-current devices in stand-alone PV system

We own a property disconnected from the public power grid with a self-sufficient PV system. The other day we had big problems with our low current devices (router, house control, heating, heating control etc. all failed) and I investigated the problem. Apparently, a power-hungry device was turned on at about 9:10 on a Friday morning, so phase B was overloaded. It probably caused voltage spikes which caused power surges to the low-current devices. My investigation revealed that the culprit was a very powerful drill. Fortunately, I don't think anything is broken. The alarm messages are in the portal and everything can be traced in the log files.


My questions:

Can I protect my power grid from such power surges? How?

How else can I prevent such risks?



overvoltage
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Alexandra avatar image Alexandra ♦ commented ·

Is this and AC PV set-up?

Are you sure it was load start up and not drop off/over production surge?


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essi avatar image essi Alexandra ♦ commented ·
yes, I'm absolutely sure!
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1 Answer
wkirby avatar image
wkirby answered ·

Perhaps adding a SPD into your AC distribution board would help to clamp Voltage spikes.
Something like this:
https://hager.com/uk/products/h/spn240d-spd-2p-pluggable-40ka-ind

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