For several months, strange things have been happening in my apartment (I live in a block of flats). I will describe briefly what it is about. At the beginning (a few months ago) I noticed that, especially at night, the light bulbs in my room sometimes dim for a second and then it's ok. I thought maybe I already have something with my eyesight, but over time we all noticed it in one room as well as in other rooms. For about 2 weeks there has been a massacre, the light can dim quite strongly, or it blinks for seconds as if there were very short voltage drops or something like that. All other devices in the house work OK only with this light such circuses. The installation was checked somehow at the end of summer 2010 and everything was ok. I also did not notice that such flashing / dimming takes place when some device is started. I even did a test - I turned off everything I could in the house and just left the light on in the room and the dimming of the light happened anyway. I don't know much about it so I described how I can.
The fact that the company has welders and uses them does not affect other efficient devices connected to the network. Your equipment broke for completely different reasons.
. It burns out when it fucks. If you don't detect anything, ask your neighbors if they have the same problem.