Different transformers are ideal in different locations like outdoors, indoors, and even near hazardous substances. Consider also where you will place your transformer and its size. For instance, machines designed to be used in the US uses 60 Hz, while in the UK, the frequency is 50 Hz, so choose a 12 volts to 24 volts transformer that will meet your frequency requirements. Different loads use different transformers hence, choose your transformer accordingly.īesides, consider frequency requirements as different countries use different frequencies. It is the load requirement that a transformer will fulfill in your application. So depending on your requirement, buy a suitable 12 volts to 24 volts transformer at wholesale price at. Second, consider the voltage requirement and main power supply voltage as transformers are made to support different voltages. However, if you want a 12 volts to 24 volts transformer for your small apartments or houses, consider a single-phase transformer as they are ideal for household equipment. If you want a transformer for industrial uses, consider buying a three-phase transformer as they are ideal for heavy equipment.
One, consider the number of phases you require depending on your application. I had to crawl into many attics to diagnose and replace stuff after DIYers installed their own thermostat and didn't keep the red wire isolated from the others.While choosing a 12 volts to 24 volts transformer, there are some factors to consider. If you short red to chassis, you hope you only blow a fuse (and usually will on a modern machine) but can fry a transformer on an old machine with no protection. You will likewise have nominal 24V (usually 28 actual) from red to blue, or red to chassis, but not blue to chassis. You will get shocked if you touch 120V black to ground, but not if you touch the neutral/white to ground. Regardless, the "common" of the control 24V is tied to ground potential, like the common/neutral of a 120V source. Also, the chassis is sometimes bonded to this control "common" at several places sometimes, and then will parallel the current also. I can't think of any late-model ones that do, but I did think of those old ones in my explanation. I work on really old machines sometimes, and have seen many that use the chassis as the return on some of the controls. Thanks again, appreciate the help.Ĭurrent is never "consumed " it all makes it back to the source, usually on a wire. If it seems like I have a misunderstanding of the basics please don't hesitate to correct me. Anyways, as mentioned the 24v becomes it's own power source with essentially it's own neutral/ground? Instead of the transformer being center tapped like our homes we're just referencing one end of the secondary to the other? Also LarryFine added, the voltage wants to return on a single wire to the transformer that is connected to the chassis? Why is it that the chassis isn't energized? Is this just the physics/nature of electricity to go back to it's source/least resistance? Or as MAC702 said the chassis is carrying current back to the transformer but it is a negligible amount? Would that be because the loads/resistance through the low voltage circuit consume the current? I realize the neutral and ground of a main panel are only bonded at one point, but perhaps seeing them together inside the unit is what is throwing me off. This makes it easy to troubleshoot and adds over current protection to the low voltage side, not sure whether an inline fuse would accomplish the same task if it weren't grounded. The common of the transformer is grounded which puts it at ground potential(0v). I believe this is where the confusion is for me and I apologise if it seems as though I'm repeating myself.
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