Can a power transformer with oil dielectric be an air-cooled transformer also?
923631
Yes.You have to appropriately reduce the rating and use it at low voltage low current applications.
544081
ok remember that freon or r134 are used in AC but is not like it is a substance that stays cold... you to compress it in order to make it liquid and then it absorves heat and evaporates completing the cycle... if you are looking for a sort of system that will make something stay cool.. .hmmm man it is called Air Conditioned
330911
A system cooled by liquid nitrogen
679718
The deciding factor here would be the Utility Company Service Entrance. THAT cannot be rewired by you! The other two points ( Low side of transformer and Motor Windings) can easily be configured either way by simply rewiring the 3 windings on the motor, and the 3 windings on the output of the transformer.\n\nOptimum efficiency will be DELTA-DELTA-DELTA or STAR-STAR-STAR...Either way no 'ground loops' to cause loss.
569589
I guess it can be done, but since your car isn't as well-insulated as your freezer, you'll need to change your AC and use a lot of power in order to do it. More power means a larger engine (more expensive) and more gas consumed (MORE expensive). You can also try buying a refrigerated truck and hanging out at the back.
265159
Yes. liquid/fluids have some property called Dielectric Strength, which upon breaking this strength by increasing/applying enough voltage, it conducts electricity.\n\nIn transformers, Oil is used as sheild (insulation) between the coils. But a transformer can burn out when subject to huge voltage that it breaks the oil dielectric strength.\n\nSalt water conducts electricity very well. Do not stand high above the electricity lines and piss over the wires. You will sure die. :)\n\nBut PURE WATER DOES NOT CONDUCT ELECTRICITY.
482056
I am not sure I understand your question. Are you asking, what are the effects of core losses in relationship with frequency and supply voltage?\n\nThe total power loss in a transformer is a combination of three types of losses. One is due to the DC resistance in the primary and secondary windings. This is called Copper loss. The two other losses are due to Eddy Currents and Hysteresis in the core of the transformer. Copper loss, Eddy Current and Hysteresis loss result in unwanted conversion of electrical energy into heat energy.
143229
odds are, that you would be beter off buying a manufactued device, dc to ac inverters are very complicated and have many different circuits. not only that, but for you to make something that can invert that much power would need an extreme amount of skill to to get the proper components. I would recomend geting a manufactured model from marine purposes perhaps. Some companies should offer custom built electronics.
874613
Power transformers are used in power system transmissions in many applications.  Specifically, step up transformers are used before sending power over long distance transmission lines, and then step down tranformers are used before the loads.  This reduces transmission line losses.
1164029
Types of transformers\nIn general, transformers are used for two purposes: signal matching and power supplies.\n\n \n\nPower Transformers\nPower transformers are used to convert from one voltage to another, at significant power levels.\n\n \n\nStep-up transformers\nA "step-up transformer" allows a device that requires a high voltage power supply to operate from a lower voltage source. The transformer takes in the low voltage at a high current and puts out the high voltage at a low current.\n\nExamples:\n\n    * You are a Swiss visiting the U.S.A., and want to operate your 220VAC shaver off of the available 110 VAC.\n    * The CRT display tube of your computer monitor requires thousands of volts, but must run off of 110 VAC from the wall. \n\n \n\nStep-down transformers\nA "step-down transformer" allows a device that requires a low voltage power supply to operate from a higher voltage. The transformer takes in the high voltage at a low current and puts out a low voltage at a high current.\n\nExamples:\n\n    * Your Mailbu-brand landscape lights run on 12VAC, but you plug them into the 110 VAC line.\n    * Your doorbell doesn't need batteries. It runs on 110 VAC, converted to 12VAC. \n\nThis page from the All Electronics catalog (#103, Winter 2003) shows some step-down transformers.\n\nIn many cases, step-down transformers take the form of wall warts.\n\n \n\nIsolation transformers\nAn "isolation transformer" does not raise or lower a voltage; whatever voltage comes in is what goes out. An isolation transformer prevents current from flowing directly from one side to the other. This usually serves as a safety device to prevent electrocution.\n\n \n\nVariable auto-transformers\nA "variable auto-transformer" (variac) can act like a step-up transformer or step-down transformer. It has a big knob on top that allows you to dial in whatever output voltage you want.\n\nThis page from the All Electronics catalog (#103, Winter 2003) shows some variacs.\n\nWARNING: A variable auto-transformer does not provide isolation from line current. For that you need an isolation transformer.\n\n \n\nInverters\nAn "inverter" takes a DC power source and boosts it up to a higher voltage. The most common type of inverter takes power from an automobile and cranks out 110 VAC to run appliances and power tools. Inverters are also used to operate fluorescent lamps from battery power.\n\nTechnically, an inverter isn't a transformer; it contains a transformer (and lots of other stuff).\n\n \n\nSignal Transformers\n"Signal transformers" also take one thing in and transform it to another thing out. But in this case, the power levels are low, and the transformed thing carries some type of information signal.\n\nIn most cases, these transformers are thought of as impedance matching.
777054
The product of flow and pressure put out by the power pack is approximately the power available to do work at the remote actuators.\n\nIn a real system, piping, fittings, filters, etc. cause some pressure drop, so the actual power available is somewhat less.
413927
Create an enclosure around it. There are plenty of acoustically dampening cloths. Use fireproof materials only. \nAlso make sure that the enclosure is vented.\n\nAs a precaution, leave an air gap of around three or four inches around all surfaces of the transformer's outside metal box. Lastly dont let the air inside ever get hot.
448145
Transformers do not store energy, that would be a battery or a capacitor.  Transformers work by wrapping wire around an iron core that is basically a circle.  For each wrap of the wire on the input side, you divide the total number of wraps into the voltage. If the input is 120 volts, and you have ten wraps, you get 12 volts per wrap.  Then, on the output side, you get an equivalent voltage per wrap.  So, that means on the example I gave, if you have five wraps on the output side you get 60 volts.  (5 x 12 volts = 60) This example would be a step down transformer, because you have a lower voltage than you started with.  If you have 20 wraps on the output side, you would get 240 volts. (20 x 12 volts = 240)  This is a step up transformer.  Note: Using Ohm's Law, you do not actually increase the total amount of power available, only change it's configuration.  Thank you, Nikola Tesla, inventor extraordinaire.
879340
If it has to be a WATER bath then you are limited by the freezing and boiling points of water, and the lowest you can get will also depend on whether the equipment is capable of cooling as well as heating - if not, then agree with previous answer, ambient room temperature is as low as you will get. If you have an OIL bath capable of both cooling and heating then your useable temperature range will be hugely expanded.
1168894
there are 2 types of transformers-1)step-up and 2)step-down.step up transformer increases the voltage& dec. the current & a step down transformer dec. the voltage & inc. the current...by now u might hv gussed ..yep...a transformer is used to inc. or dec. current which is distributed to diff. houses & factories acc. to the requirement.
107063
Yes, a full-wave rectifier can be made with only four diodes. No transformer is required.
780349
permeability and dielectric