David
Which, if any were 220v single phase?
Do you have three phase?

There is a problem called "single phasing" whereby one leg of the circuit goes soft/low/to zero and wreaks havoc on motors...causing excessive instantaneous current draw on one leg and killing them. The challenge is catching it as often it is somewhat intermittent.
In order to catch it the power company would need to set a line monitor in place.

This can be caused by any recently added large single ph loads in the area, and, when turned on, can cause an imbalance. It can also be caused by a transformer that is beginning to fail.

Regardless, hound your power company. As others have stated, this is a potentially disastrous situation on many levels if not remedied.

Good luck!