I have a very unstable power line that goes from 189V to 230V, so I installed a voltage regulator (APC Line-R 1200).
The problem is that when the voltage regulator switches from one coil to another, that switch generates interference.
With DSO connected to a not regulated electrical outlet (so that the instrument itself is not affected by the interferences introduced by the voltage regulator) I measured:
- the ripple of a stabilized power supply (DP832)
- the stability of 1MHz sine waveform
Both readings show interferences, expecially in the case of the power supply (800mV ripples!!!).
What do you recommend?
a. eliminate the voltage regulator and let your instruments go with a unstable power line
b. install an isolation transformer between the voltage regulator and the instruments
c. eliminate the voltage regulator and install a double conversion UPS
p.s. I know that the main problem is with the power company. But the voltage instability is not a problem that will be easily solved. The section of the cables that supplies us was ok many years ago; now the number of housing has increased and that small section is no longer enough to serve all us without problems. The power company will not replace the entire line just because I'm complaining, I need a lot more people to join me, but for them it is all ok, tvs turns on and all is fine
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