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#58055 - 10/27/05 03:35 PM Over voltage conditioning
qopanel Offline

Registered: 07/09/02
Posts: 16
Approx a year ago we did a build-out for a dentist. He has been constantly blowing bulbs in can lights and just recently brought it to our attention. A voltage check was done and found about 128.9v. We have since supplied him with 130v bulbs, hoping this will solve the problem. Last night we received a call telling us his compressor motor burned out. A voltage check phase to phase showed 249.8v. The tag on the motor rates the voltage to be 208-230v and around 8amps (i forgot what it said exactly). A tech from the compressor cormpany (who first found the problem) told the dentist that the voltage is way to high. What I'm asking is, is there a plug in type conditioner that I can use instead of a buck boost? The plug configuation is a 250v 20amp.

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#58056 - 10/27/05 05:11 PM Re: Over voltage conditioning
Bob Offline

Registered: 02/05/02
Posts: 182
Loc: Mobile, AL, USA
You should check with the utility and see if They can lower the voltage. That voltage should be within a specific range. Some locations it 10% and others it's 6% of 120 volts. The 130 volts seems high however the 249 volts is within range.

#58057 - 10/28/05 12:24 PM Re: Over voltage conditioning
qopanel Offline

Registered: 07/09/02
Posts: 16
The utility is within there limits. 10% either way. This office is the 8th down the line from the main service which has is a multi metering service. It is approx 190' feet from the meter. From the main service to this office we are losing only 1v. Utility said they will do nothing.

#58058 - 10/28/05 12:33 PM Re: Over voltage conditioning
winnie Offline

Registered: 09/15/03
Posts: 652
Loc: boston, ma
Given that the motor is burnt out, perhaps the place to look is at the motor itself.

Use a 240V motor, or get the present motor rewound to match the supply voltage.



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