Hi. I measured electricity frequency as variable between 50-800 Hz. Does it cause any problem in my home?

 

Hi. I measured electricity frequency as variable between 50-800 Hz. Does it cause any problem in my home?

How did you measure this? There is almost no possibility this is correct.

 

I measured it with multimeter. Can some devices make frequency distortion in my home?

 

I measured it with multimeter

THe way that AC power is generated requires the frequency be maintained within a very small range, about ±1Hz.

Your meter is having some sort of problem and not giving you reliable readings.

 

I mesured 1 phase as 50Hz stable and 1 phase varying 50-800Hz.

 

Also, if you actually had such a situation, very few of your household appliances simply would work, if any at all, and things with motors like refrigerators and air conditioners would make it very clear they were unhappy, so absent screeching, fires, and failures—your meter is not working.

 

My water pumps broken due to that I measured frequency.

 

I mesured 1 phase as 50Hz stable and 1 phase varying 50-800Hz.

There is no mechanism for your mains to have a frequency other that 50Hz with a < 1Hz variation. There is an absolute requirement the generators creating the power stay in the range and nothing between you and them that could shift ithe frequency.

 

I mesured 1 phase as 50Hz stable and 1 phase varying 50-800Hz.

Sounds like your meter isn't reading it correctly, what country are you in?

 

High frequency noise on the line may be causing your bogus meter readings.

My water pumps broken due to that I measured frequency.

I highly doubt that.
What makes you think that's what caused the failure?

 

High frequency noise on the line may be causing your bogus meter readings.
I highly doubt that.
What makes you think that's what caused the failure?

I read it as the pump is broken, so that's why he's probing around and seeing the odd frequency reading.

If the circuit has failed open, perhaps he's seeing an artifact such as EM from fluorescent lights.

 

Your power comes from a rotating machine somewhere. That machine is spinning 3,000 RPM (maybe 1,500RPM) to deliver 50Hz. In order for it to deliver 800Hz, it would have to spin 16 times faster, 48,000RPM. Even if you receive power from a nuclear plant in runaway condition, I doubt it could spin that fast without flying apart. All the transformers on poles would be exploding around you. In other words, you are not receiving 800Hz power. Your meter is lying to you. They do that sometimes, especially the cheap/crappy ones.

 

Perhaps one phase is open and he's seeing noise pickup (but no power). Or is this a 3 phase circuit?

 

Perhaps one phase is open and he's seeing noise pickup (but no power). Or is this a 3 phase circuit?

Probably noise, not necessarily an open circuit. To get a proper measurement on a noisy circuit it would be best to use a low impedance meter. Either an analog meter or a DMM with low-Z mode

 

I mesured 1 phase as 50Hz stable and 1 phase varying 50-800Hz.

what meter do you have to measure frequency ?

 

I read it as the pump is broken, so that's why he's probing around and seeing the odd frequency reading.

That's why at school they still teach to put commas somewhere in sentences.

 

Sounds like your meter isn't reading it correctly, what country are you in?

I live in Turkey, I opened circuit breaker and measured only network side, it was 50 Hz

 

I read it as the pump is broken, so that's why he's probing around and seeing the odd frequency reading.

If the circuit has failed open, perhaps he's seeing an artifact such as EM from fluorescent lights.

Pump broken, then I tried to investigate source of the problem I saw the frequency was unstable

 

what meter do you have to measure frequency ?

I measured with multimeter VICTOR VC97.

 

Thank you,
What I think is happening, is to do with the meter.
It looks a lovely meter,

but I wonder how it measures frequency ?

If the input was say a nice square wave, it could time between two rising edges, to give a frequency,
same would work for a nice sine wave, as in perfect AC mains.

BUT

The real AC mains, is going to have lots of spikes on it, like this,


now what is the meter to do ,
it measures between rising edges,
in this case its going to read 6 times the real frequency

what happens if it has two spikes, quiet close,
the it would measure these as the frequency , and could be very high.


You really need to look at the quality of the signal,
which is a scope job,
if its a nice sine wave, then the frequency meter is fine,
if it has spikes, then the frequency meter is not of much use.