S9-M-50~2500/33KV Three Phase Oil-immersed No-excitation Voltage-regulating Power Transformer

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S9-M-50~2500/33KV three phase oil-immersed no-excitation voltage-regulating power transformer is suitable for distribution system with 10KV.50 HZ for industrial and mine enterpprise,power illumination.It confirms to GB1094<power transformer>standard.

it performance parameter reaches international advanced level of 90s simila product..it has strongpoint opf advanced workmanshiop.novel design,nice appearance and less ground demand.provide S9-M type product based on user requirments.

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Q:How to test a Current Transformer (CT) ? thanks in advance?
Yes, Current transformers can produce dangerous voltages, but I don't think they are properly loaded with an ac milliamp meter. If the primary has 1/2 turn and the secondary 5000 turns, the turns ratio is 10,000:1. One millivolt drop in the primary produces 10 volt ac in the secondary, but the volt meter loads the primary somewhat, so the voltage is somewhat less. A calibration curve can be made of ac current verses ac voltage for the particular volt meter, possibly up to 1000 volts ac, which may represent several thousand amps. Neil
Q:What is a true magnetic transformers?
All transformers are magnetic. Perhaps if you would provide a link to the product in question, maybe even to its user's manual, some more information could be gleaned that would allow a more helpful answer. I have no idea what an alien bees unit is. -------- Ok with that I was able to google some more info. So you have a unit that came with a 120V power cord, intended to be plugged into a north american AC power outlet (120V, 60 Hz), and you need it to run on your local current, which is 220. You don't have a power brick or wall wart, the AC goes right to the flash unit. Yes? And the specs say it draws up to 6 amps at 120 volts, 60 Hz. What they're talking about is that you need a true voltage conversion transformer (usually this is actually an autotransformer), NOT any other sort of voltage converter. Travel stores in this country (US) sell these small and cheap voltage converters, made to allow use of certain high wattage devices (up to 1500 watts) on 240 even though they're made to run on 120. But they don't use a transformer, they use a capacitor and a diode. They're ok for things like curling irons and space heaters. They're completely unsuitable for anything electronic. You can usually tell the difference between a true transformer voltage converter and the voltage converter by weight. The latter weigh just about nothing. Whereas even a 50 watt transformer will sit fairly heavily in your hand. For a device that pulls 6 amps at 120 volts, you need a transformer of at least 1000 watts capacity. I've linked one below. Of course that is a US seller, but this will give you an idea of what to look for. Note that it weighs 17 pounds (about 8 kg) and is about 5 x 7 x 8 inches (13 x 18 x 20 cm). There just isn't any way these get much smaller or lighter. .
Q:three phase transformers pole mounted.?
In electric distribution structures transformers are available countless sizes. Heavy ones are generally located on the floor with a concrete pad located under it to furnish help. those pad fastened transformers are risk-free against touch with the regularly occurring public generally with a fence. Pole fastened transformers are lighter and can be accurately located immediately on the skill pole. i don't comprehend of any floor fastened transformers different than for transformers located in vaults while the distribution strains are underground. yet those additionally desire some form of pad under them.
Q:why doesn't the emf induced in the primary of a transformer does not cancel out with the supply voltage?
Your logic is valid but a careful look will tell what is happening. This strange behaviour is not that uncommon, it has analogy in other areas also. For example when you push a large stone, it is pushing you back (famous third law), then how does it move at all, if it cancels the supply force? On the other hand when you push a strong wall, it reacts with equal and opposite reaction. The thing is if the wall did not exert this reaction it would have allowed itself to be pushed back without any resistance!! These action / reaction like, supply voltage and induced emf (other examples are terminal volt of a d c motor and back emf, generator output and its reaction on prime mover etc etc) are all must be conceptually understood. I can dare say that they do not exist as such! They are merely way of understanding the concepts. When you supply ac volt to a coil (transformer without secondary load is just a coil) because of energy transformations taking place we see that the coil offers resistance much different from pure resistance, which is called impedance. But the same can be viewed as reduction of available voltage due to induced emf. I repeat this is a conceptual understanding of the phenomenon.
Q:Power drawn by a transformer?
Ns/Np Vs/Vp Ns (8/120) * 600 40 turns P Pp Ps Vs * Is (an ideal transformer) 8 * 0.570 4.56 watt 13.5 percent of the input power is dissipated, then the power from output coil (100 - 13.5) % 86.5% of input power. ---Po 86.5% Pi 4.56 0.86 Pi ---Pi 4.56/0.86 5.30 watt
Q:AC Transformer & Circuit Board Problem?
Transformers don't normally fail for no reason. In most cases, something caused the transformer to fail, so it is incumbent upon the person servicing the unit to figure that out first before installing another transformer and powering it up. If it can't be determined what caused the failure, it is best to install an in-line fuse so, if there is an issue, the fuse will blow before taking out the transformer and the circuit board. Having said that, in a lot of cases, the circuit board has its own built-in fuse to protect the board from cases such as yours, so the board fuse should have blown before the board became damaged. I don't have much confidence in what your man did, so I'm more likely to blame him for blowing out your circuit board and the new transformer, unless he can prove otherwise.
Q:Low volts transformer question?
you need a transformer that will support the 12volts lamps and still connect to the 120volt outlet. the best suggestion is to go to the Radio Shack and talk to the counter dude for help --- or --- go to the garden lighting section at Lowe's etc, for
Q:How do transformers work, no not the robots.?
Transformers can e used only for A.C the fluctuating current in the primary coil produces a magmetic field.this magnetic field by mutual induction makes a current in secondary coil The no:of turns in primary and secon determines thr rating of transformers more the no:of turns more magnetic field will be produced in primary and less the no:of turns in the secon lesser will be the current induced and vice versa For more details visit
Q:Transformer issues?
500 kVA ÷ 0.380 kV ÷ √3 760 amps The nameplate rating (kVA) of a transformer is designed for 50% insulation life after being loaded to nameplate kVA and running with a top oil temperature of 110 °C for 20.55 years. (180,000 hours) Since your ambient temperature is not constant, and the equipment does not run continuously, the transformer's insulation will last far longer. In most real world applications, if a transformer is not loaded to nameplate, it will theoretically last for more than 100 years. Many electric utilities load their transformers beyond nameplate to take advantage of this overly long life. Motor Inrush: As for the motor starting inrush, the missing factor is how often the motor starts. If it is only seeing an inrush once an hour, the transformer can handle an inrush of 4x nameplate. Your motor's inrush of 1700 amps is 1700 ÷ 760 2.2 times nameplate. According to a transformer manufacturer's table, a transformer can handle an inrush of 2.2 times nameplate more than twenty times an hour. I highly doubt this 450 HP motor is starting and stopping every three minutes. You are good to go with the 500 kVA transformer.
Q:Ok I tried to make my own step up transformer that uses a pulsed DC current in the primary and it doesn't work?
I think your current detector was not good enough. Was it a bulb? It wouldn't supply enough current for one. I'd suggest you need a more sensitive indicator. What you should see is about 48V. AC on the secondary, plus some more due to the inductance of the primary. Your electrode you rub on the file must be very small, such as the end of a wire, to give an interruption. You could probably get an indication on a digital multimeter on an AC range. Just don't expect it to be an accurate reading. If you're game, you could hold one end of your secondary in your fingers, and touch the other end to your tongue, then do the file thing. But you might only want to try once! I often use my tongue for low voltage indications. But 48V. would be a bit much for me. Ouch!

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