Transformer Problem

If it is happening on the supply side, then it is the result of someone else, likely near by, overloading that phase. You need to call your utility, it's their problem.

You might have a loose connection someplace....I would use an infrared temp gun to check for hotspots, and any loose connections on main lugs and breakers....might be a loose or bad neutral wire....use link below for troubleshooting guide...

http://www.epanorama.net/newepa/2010/09/14/ground-currents-open-neutral/

how do you know that other 2 phases don't have the problem while you are only using the other phase?

Are you the only household having this issue?

If no then it is a distribution power issue possibly a bad transformer, an overloaded transformer, or a bad connection on the transformer.

If you are the only household having issues:

If you have a main breaker or manual disconnect included in your service it would be a good idea to:

1. Check the all of feeder connections where the main breaker and conductors attach to the main terminal lugs for loose connection(s).

2. If equipped with a disconnect check the knife blades and /blade contacts/receivers for loose connections and heating damage. If the disconnect is a fused type; check the fuse sockets for loose fit, sprung contacts, and evidence of heating damage.

3. If all connections are properly torqued and there is not any indication of heating on any of the conductors and/or bus bar up to the meter base then the utility company is responsible for all connections on/in the meter base, all connections at the top of the service entrance riser, in the feeder cable(s) back to the service transformer, and all transformer connections.

Be prepared to experience denial and pushback from the utility company.

Example:

My niece who lives about 60 miles away not long ago was having the same issue as you describe resulting in loss of her almost new clothes dryer and a freezer.

The utility was contacted and they would not accept responsibility for the issues so she was told to hire a local contractor to fix her problem.

Ten days later and after spending over $2,000 with two local electric contractors the issues were still present.

I travelled to the site and found a bad crimp connection on one of the aluminum triplex conductors at the pole transformer.

Proving the issue to be on the utility side and leading the utility lineman to the location of the fault was one of the most trying experiences in my life.

I had to open up and prove the service entrance conductors up to the meter base before the linemen crew would pull the meter and check the conductors connections.

Once the meter was removed I put my DVM on the incoming (supply) side of the base to prove the voltage to the meter base was faulty.

I then had to walk the linemen step-by-step through the troubleshooting procedure while experiencing severe pushback at every step.

It took seven hours that day from start to finish to get the utility company to correct their issue.

One of the linemen did apologize to my niece then thanked me for teaching them how to correctly troubleshoot a residential service so maybe that crew will know what to better do in the future.

All told it cost my niece around $1,500 to replace her dryer and freezer so with the $2,000 paid to the two local contractors the direct cost to her was around $3,500.

Sounds like you have a good case for small claims court.....

http://myorangeclerk.com/enu/Pages/court-services/small-claims.aspx

thankssssssss alottttttttt

Did Seth Brundle transport you in a Telepod along with a cobra a few days ago???

Op, is a little bit weird. " Thanksss alottttt"

Since you're speaking of a home running 220V single phase, a variation in voltage can have many reasons that 'll get to in a minute. I do have a question though; The other two phases never reach your home, so how do you know that they are okay?

Most neighborhoods only have single phase power on the poles or underground, while commercial has 3 phase power. The voltage on the incoming line is typically 7,200V and is stepped down to 220V at the pole. If you're getting voltage variations, the reasons is:

1. The 7,200V source have variations - not likely, since all your neighbors would be having this problem and most likely, you aren't on the same line as a heavy industrial user.

2. The step down transformer could be having trouble. These transformers are very reliable, but they do go out.

3. The wires leading from the transformer to your house could have a bad connection.

4. It could be something in your home that's causing the variations - AC uses a lot of current or it could even be a big home theater system. Electric stove or oven, electric clothes dryer, electric water heater or an air compressor or air tools in the garage. Your EV car could be charging as well. A combination of these can cause voltage drops and spikes, depending on the current usage.

At this point, you should start isolating the problem. First, find out when it's happening and check what's running in your home. Add up the current usage and see if it's excessive. If you have the old style electric meter, you can watch the wheel to see how fast it's spinning. If you have the new style electric meter, your power company most likely won't tell you when you have a current spike - they'll typically show how much current you used in a one hour time period - won't help you much. Second, I would check the connections at your power panel - most likely won't be bad. Also, depending on the age of your home, check the wires coming into your stack (on the roof). If the insulation is cracked, you should have new lines dropped. Third, I would take a look at the connections on the transformer (on the power pole).

Good luck and let us know what you find out.

First of all how do you know that there is voltage variation occur at one phase? What is the Voltage measurement at your home, 200V, 220V, 240, or 180V, ?? and what is the actual voltage measurement at the other 2 phases?? Can you please give us some data on it...