Led Transformers Explained
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FAQ
- If it is powered by a DC source, will there be a Back EMF generated? Why/Why Not?Obviously, there will be a higher current flowing than that of a AC supplied transformer, but I don't know why.Thanks.
- No. a transformer cannot be powered by AC.because due to the steady flow of current in dc,it will not create any disturbances in the secondary coil in transformer.
- Transformer rated capacity 500 / 750KVA (AN / AF) What does it mean?
- Air cooling can improve so much no sure no problem, and now a lot of transformer air cooling and self cooling ratio is 100: 80, 100: 70, there are 100: 60.
- i have plenty of 3 phase 220 in my shop, but one of my machines requires 440 3 phase. i was going to use a 75 kva transformer with 440 primary 220 secondary in reverse to supply the machine. it is a 15 hp motor 40 amps. i figured my minimum kva requirment to be 37.5 but more cant hurt for the potential high cutting rates i may need to achieve. i simply wanted to buy the transformer, hook the 220 3 phase supply to the primary, and the output to my machine. I think this will provide me with 440 output. the motor plate says 7-1/2 hp/15- hp. 40/20 amps. Any help is welcome, i hate to buy the transformer and not have this unit work. i would change the motor wiring, but the diagram is gone, and the wires are not numbered, also i believe id have to change all the heaters, which are hard to come by, as well as various other parts in the panel. just seems the transformer is the easiest way to get this machine up and going in prouction.
- The main disadvantage of using a transformer with a motor is the high starting current in the neighborhood of 600% of rated full load current. The transformer impedance will cause a significant voltage dip on the secondary of the transformer when the motor is coming up to speed. Using an oversized transformer will probably take care of that. If this is some type of cutting tool, I assume that it is never started with the cutting head in contact with the load. That will also help. Edit 1 You should also consider provisions for grounding the load side. The secondary should be wye connected so that you can ground the neutral. That means that you should buy a wye-wye transformer so that you can use the low low vlotage side as the primary and still have a wye secondary.
- If a transformer rating 240vac 50hz being supplied by a source 240vac 60hz,will it get hotter than by 240vac 50hz source?
- Inductive Reactance increases proportionally with frequency. Therefore, if the supply voltage remains the same but the frequency increases, the impedance increases. This will lead to an increase in heat. If the supply voltage remains the same but the frequency decreases, the impedance decreases, which means that less heat is produced. The answer to your question is NO.
- Hope to engage in the transformer predecessors to answer. I hope you help me introduce a little more recommended information better
- Oil-immersed power transformer is one of the company's leading products, the original Ministry of Machinery Industry planning in Shandong Province, 220kV and below the production of the only key power transformers. Product voltage level 6 ~ 220kV, capacity 30 ~ 360000kVA, including 23 series, more than 200 varieties, more than 1,400 kinds of specifications, the technical performance indicators all meet the national standards and the International Electrotechnical Commission standards. The company has designed and manufactured the first domestic 110-kilovolt 31500 kVA three-coil aluminum transformer. Since the 1982 production of 220kV transformer, the product has been used in sunshine, Taizhou, Jiangxi and many other national key projects
- the use of autotransformers is strictly prohibited.
- Double-winding type safety isolation transformer load side and the power supply side is not electrically connected, is safe, and autotransformer primary shared a winding, it has a direct electrical connection with the power supply, unsafe.
- describe a stabilised transformer
- I'm only guessing that you may be reffering to a transformer that is equipped with taps on the windings that allow for +/- 10% votage changes on the secondary to maintain a fixed voltage when the input voltage (primary) varies or the load on the secondary varies. Thus stabilizing the voltage to the load. These are called TCUL (tap changeing under load) or LTC (load tap changing)-the more common term-transformers.
