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- Oct 31, 2015
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If it is a resistance heater, which it appears to be, the amps will not drop, they will go up by the ratio of the voltages. And the heat output will go up by the ratio of the voltages squared. So, as someone said earlier, yes you will get more heat, but for how long before burning out the elements is anyone's guess. The manufacturer can probably answer your questions without guessing.If you use 220v your current ( amps ) will drop a bit. I wouldn't worry about it
Sent from my SAMSUNG-SM-J320A using TapatalkI recently acquired a muffle furnace in an auction. The nameplate specifies 208 volt single phase input. Am I going to fry it if I use standard 240 volt input? If so, is there an economical way to convert 240v to 208v?
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You only need a 7.5 kva since the transformer only carries part of the load. Still about $125.A 32 volt bucking capable of carrying 28 amps will be around 900 watts. A substantial transformer. New cost would be close to $200.
http://www.newark.com/hammond/1182u30/transformer-toroid-60v-1kva/dp/54X7560
The muffle furnace is rated at 3.8 kva. I calculated the power requirement for a bucking transformer from the bucking voltage x the rated current draw; 32 volts x 28 amps = 896 watts.You only need a 7.5 kva since the transformer only carries part of the load. Still about $125.
Firstly, the nameplate shows an operating voltage of 208 and a current of 28 amps. This would calculate to 5700 watts. The nameplate also states 3800 watts. Looking at ThermoFisher specifications for current products, it appear that the 5700 watt rating would be correct. I thought at first that the current rating may have been maximum inrush current but most of the common resistance heating alloys have resistance increases of less than 10% at 1200ºC. I would assume that the current specification was the correct value unless additional information proved otherwise.
A 32 volt bucking capable of carrying 28 amps will be around 900 watts. A substantial transformer. New cost would be close to $200.
http://www.newark.com/hammond/1182u30/transformer-toroid-60v-1kva/dp/54X7560
You only need a 7.5 kva since the transformer only carries part of the load. Still about $125.
The muffle furnace is rated at 3.8 kva. I calculated the power requirement for a bucking transformer from the bucking voltage x the rated current draw; 32 volts x 28 amps = 896 watts.
If you check out the transformer recommended by the calculator (1S46F), you'll find that it is a 1 KVA transformer capable of bucking or boosting a 7.5 KVA load. It is not a 7.5 KVA tranformer. RJS's calculation is correct. A 1 KVA buck/boost transformer will handle the OP's application.
Or "Two heads are better than one." ....... especially when you're taking about draught beer........... Proves the old saying "All of us are smarter than one of us."
According to Schneider/Square D, that's the right model for your application. Can't vouch for that particular one. You pays your money and takes your chances on ebay.So this one should do the trick?
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/392033126635