SZ9 ON-load Tap-changer Power Transformer

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Q:in the Transformers comics/TV, do humans ever take control/become a transformer? ?
no they don't
Q:please help physics transformer?
No, it can't. If it is connected to 120VDC, the output will give an initial pulse that decays to zero and stays there. The input will draw far more current than designed, overheat, and either open up or catch on fire. Here is how a transformer works with AC: The input winding generates a magnetic field (because it is an electromagnet). The field alternates because the applied current alternates. The alternating magnetic field couples into the output winding where it induces an electric voltage that alternates because the magnetic field is alternating. Now here's the kicker. The voltage induced in the output winding is proportional to the rate of change of the fluctuating magnetic field. If the field is static (ie, steady, as is the case if the input winding is powered by DC), then the rate of change is zero and the induced voltage is zero. That's why the transformer can't transform DC. Other interesting facts: The input winding converts electrical energy into energy in the magnetic field that is then converted back into electrical energy in the output winding. The input winding resists DC current based on the winding's resistance. If the input current is alternating, then it resists the current additionally based on the inductance of the winding, and the higher the frequency, the more it resists. A transformer is designed to work on a specific frequency (eg, 50Hz or 60Hz). Operating it at 0Hz (DC) will allow too much current to flow. The higher the applied frequency, the more power the transformer can transfer. Think of it as though the transformer passes a bucket of energy from input to output on each cycle. The more cycles per second, the more energy per second, aka the more power. At 0Hz (DC), it isn't passing any buckets of energy. Hope that helps.
Q:Question on a auto transformer?
At 40 V and 10 A the VA is 400 on the secondary side. At 240 V on the primary side the current is 400/240 which is 1.66 A. If the load on the secondary side is 34.5 ohms at 40 V then the secondary current is 40/34.5 1.16 A and the the VA on the secondary side is 40 x 1.16 46.4. T he VA on the primary side then is 46.4 and the primary current is then 46.4/240 0.19 A. 3 hp is 746 x 3 Watts 2238 W and its rated current on the primary side is 2238/240 9.325 A. In other words the VA loaded on to the secondary side is the same VA (more or less) as that on the primary side.
Q:TN-S system in the transformer side pe line and n-line neutral point how to take
1, this part you can not look at the design rules, the design process is just that principle, should go to check the installation Atlas; 2, the transformer is the neutral point leads to two lines, one to the transformer shell, and then the shell is also grounded; another to the indoor low-voltage cabinet; this is a line after the PEN line, conditions can lead two , But mostly cited a, is shared by PE and N; 3, in the low-voltage cabinet, from the transformer zero leads to the line is divided into two, one neutral line N, the other is to protect the ground PE; generally in order to ground and reliable, where the PE to access the cabinet, The distribution cabinet is installed on the ground network, is directly connected with the ground network, so it is equal to repeat the ground; 4, N line is the work line, for single-phase load, that is, to over-current, or single-phase equipment can not work; and PE line is the protection line, there is no current flow, a current, , And this should pay attention.
Q:How do I determine if a transformer is beyond the normal temp range and is at risk of failure?
The temperatures you measured seem hot but might be acceptable for the type of materials used to insulate the coil inside the transformer. Only the designer of the transformer could tell if it's too hot or not. One rule of thumb : for non industrial electrical devices, the outside temperature of the device should remain at a temperature that lets you touch it without feeling pain. But one thing is sure: high temperature is not good because the transformer will age faster and it's less efficient (and therefore generates more heat). The transformer can overheat for 2 reasons : either your load is above the nominal rating or the transformer is not able to cool down as designed (usually because it's in an enclosure which doesn't let the heat get out). If you are indeed getting 750kva from it, then you are definitely at risk. That's more than 3 times the nominal rating. I would be surprised that it lasted for so long. If you can't reduce the load (best option), try to let more air flow freely around it by removing stuff around it. Last resort try cooling it down by forcing cool air to flow around it with a fan. But this can be tricky because the bottleneck of the heat exchange could be inside the transformer so the outside might get cooler and the inside could remain very hot.
Q:How much capacity the transformer has
For power transformers, there are 10 20 30 40 50 63 80 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000 2500 3150 4000 5000 6300, etc. kVA.
Q:Why are transformers made with parallel plates and not solid metal?
Transformers Plates
Q:Are they planning a 3rd Transformers movie?
yes, Transformers 3 is the working title for the third film in the live action Transformers series, directed by Michael Bay and produced by Steven Spielberg. It is the sequel to Transformers: Revenge of the Fallen and is scheduled for release on July 1, 2011.
Q:High Voltage RF transformer design? ?
Last transformer I made had a 1000 volt secondary, a 28 volt primary, ran at 22kHz, and a 20mA capability. It was wound on a ferrite form and was a cube about 1.5 inches on each side. I had a lot of difficulty keeping it from shorting out. I used lots of special HV insulating tape between winding layers, and managed to get a few working, but it was difficult. It was used in a voltage doubler to generate 2500 volts DC, so the entire winding had to withstand that voltage. Remember that there are only a few volts between consecutive turns, but after a hundred turns, that builds up to hundreds of volts. .
Q:physics transformer output and input question. help?
just read your text book. lets say we have a transformer with a turns ratio of 10:1 If we apply 20 V on the high voltage side, (the side with the higher turns ratio aka 10:1), on the other side it will have 2 V. This is because of the turns ratio. Lets say that the power input on the high V side is 100W. So the current on the high V side is 100W/20V5 A Assuming ideal transformer with no losses, power in is power out. So on the other side, you will also get 100W. So the current on the low V side is 100W/250 A Basically, going from one side to the other, the V increases and the I decreases to keep the same power on both sides, as according to the turns ratio. I hope that you can figure out how the turns ratio of 10:1 made sense here. I better get best answer for this, lol. But seriously, read the text book, see how the turns are wound see how the electric field makes a magnetic field, which makes the electric field, etc.

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