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Post by bhammer on Dec 16, 2018 6:38:31 GMT
Seasons Greetings.
Some of you may have followed turbokinetic's excellent thread (including video) about restoring my control bellows system.Well I've been slow in getting the DR restored and the turbokinetics control re-installed due to winter weather and lack of decent work space. I have made some progress and hope to get that control installed and tested soon.
My question is: Are the DR unit control systems sensitive to the higher line voltage we now see in most geograpies? I have some experience with old vacuum tube electronics and use a variac to control line voltage to those systems. Back in the day the line voltage was typically in the 115 AC voltage range. Nowadays my line voltage gets as high as 124 VAC. Are the components in the control unit, or the motor in the refer unit, sensitive to these higher line voltages?
I remain optimistic that turbokinetics work is going to prove to be the magic that brings my DR to life.
Looking forward.
Bhammer
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Post by elec573 on Dec 16, 2018 7:02:58 GMT
That’s a good question.
I don’t think it’s a problem though. When these fridges were built electricity was still a luxury in a lot of places and subject to Variations.
But if you want more protection put in line fuses ,or gfci outlet in . I’ve had my ck plugged into a regular outlet for over 2 years now . Through power outages and just turned off
and on for various reasons . No problems , but adding safety won’t hurt any thing .
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Post by ckfan on Dec 16, 2018 7:25:01 GMT
I know that most products have a fair amount of tolerance built in. They can take higher and lower voltages no problem. It just depends on how much it strays from the listed voltage. I think most items have a 10% variance. I have no idea how much variance the old GEs had though.
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Post by cablehack on Dec 16, 2018 7:57:12 GMT
From the DR manual, it says, "While the rated voltage is 110 volts, a standard machine will operate satisfactorily on any voltage between 100 and 125 volts"...."When the voltage is above 125 volts and the machine is operating under heavy load conditions, the current to the motor may be sufficient to trip the motor protective device".
Although it no longer applies in the U.S., for 50 cycle supply the maximum voltage for the DR is 120V.
If high mains supply voltage is a problem, it's possible to connect up a low voltage power transformer in such a way to subtract from the incoming supply voltage. Back when I had a modern fridge, I had troubles with the Klixon tripping on hot days, the first summer after I bought the fridge. The compressor was labelled as 220V. This shouldn't have been sold in Australia with its 240-250V mains. I connected up a 240 to 24V transformer so that it dropped the mains by 24V and never had any further trouble.
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