What to do if computers often burn out at night?

Semen asks:
Often computers burn out, and with uninterrupted power, the brains of kondeya, and other consumers. Most often this happens at night. The network is three-phase, during measurements the voltage does not jump, the neutral contact is normal. What do you advise?
The answer to the question:
Could it be surge voltages? On the other hand, if this happens mainly at night, then it is likely that at night the voltage rises greatly, and this burns out. First, try connecting them through the stabilizer, if it doesn’t help, look towards the SPD, we already wrote about these two devices in the articles on the site:

https://our.electricianexp.com/en/klassifikaciya-ustrojstv-zashhity-ot-impulsnyx-perenapryazhenij.html

https://our.electricianexp.com/en/kak-zashhitit-domashnyuyu-elektroprovodku-stabilizatorom-napryazheniya.html

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