JDCF-110,132,220,230 Voltage Transformer

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Loading Port:: Shanghai

Payment Terms:: TT OR LC

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Supply Capability:: 1000sets set/month

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Brief Introduction
The"JDCF"series voltage transformers are inducitive type,single phase,oil filled,outdoor type.It accords to the GB 1207-1997<voltage transformer>,IEC 186 and IEC60044,This type of voltage transformer is of cascade full seal construction,The product consists of winding assembly,porcelain housing,transformer oil,base and stainless steel Bellow.

The primary winding of 110KV or 132KV voltage transformer is divided into two parts,wound separately around the upper and lower core,Wound around the lower core,three secondary windings are respectively measuring winding,protective winding and residual voltage winding.

The primary winding of 220KV or 230KV voltage transformer is divided into four parts,wound separately around two cores.Wound around the lower core,three secondary windings are respectively measuring winding.protective winding and residual voltage winding.

The active part is located to the base by suporting frame made of high quality insulation materials and is put into porcelain housing with degassed and de-watered transformer oil after vacuum treatment,All outlet wires of secondary winding and the terminal "N" of primary wnding are connected to the epoxy resin board which is in the waterproof and dust-proof terminal box of the base.There is a valve for oil-filling or oil-exhausting on the base.
Type description

Technical Data

JDCF-110,132 Voltage Transformer Outline Drawing

1.Oil-level indicator
2.Bellow
3.Primary terminal
4.Porcelain bushing
5.Insulation support frame
6.Winding body
7.Secondary terminal box
8.Base
9.Name plate
10.Valve
11.Earthing bolt

Type
JDCF-110W2
JDCF-110GYW2 JDCF-132W2
H1
1500±20
1700±20
H2
1800±25
2000±25

JDCF-220,230 Voltage Transformer Outline Drawing

1.Bellow
2.Observation window
3.Primary terminal
4.Primary terminal
5.Hook
6.Oil draining outlet
7.Name plate
8.Earthing bolt
9.Secondary terminal box
10.Base

Type
JDCF-220W2
JDCF-220GYW2 JDCF-230W2
H1
2510
2750
H2
2960
3200

Q: Electrical Machinery, electrical machines, transformers: A transformer steel core's remanence means that it retains a static magnetic field when power is removed. When power is then reapplied, the residual field will cause a high inrush current until the effect of the remanent magnetism is reduced, usually after a few cycles of the applied alternating current. Overcurrent protection devices such as fuses must be selected to allow this harmless inrush to pass. When a transformer is livened, the magnetizing inrush currents are estimated as multiples of the transformer's nameplate kVA. Time Current (sec) - (amps) 0.01 -- 25x 0.10 -- 12x In addition, during the normal life of a transformer you can expect hot-load and cold-load pick-up events. These are estimated as Time Current 1.00 -- 6x 10.0 -- 3x 100. -- 2x You must select transformer fusing that will not be damaged by these events. Drop me an e-mail for a more detailed explanation.

Q: When the transformer voltage is a rated voltage, the secondary voltage in the end is how to change with the load, what is the basis for the theory of the way you ask you about the inrush: 2 excitation current characteristics When closing the circuit breaker to charge the transformer, sometimes you can see the transformer ammeter pointer put great, and then quickly return to the normal no-load current value, the impact current is usually called the inrush current, features are as follows: 1) The inrush current contains high-order harmonic components (mainly secondary and tertiary harmonics), so the variation of the inrush current is a steep wave. 2) The attenuation constant of the inrush current is related to the saturation of the core. The deeper the saturation, the smaller the reactance and the faster the attenuation. Therefore, at the beginning of the moment decay quickly, then gradually slow down, after 0.5 ~ 1s after its value does not exceed (0.25 ~ 0.5) In. 3) Under normal circumstances, the greater the capacity of the transformer, the longer the duration of attenuation, but the general trend is the inrush current decay rate is often slower than the short-circuit current attenuation. 4) The value of the inrush current is very large, the maximum rated current of 8 to 10 times. When setting up a circuit breaker to control a transformer, the quick break can be set according to the transformer excitation current.

Q: I need to know the details of TRANSFORMER OUTEGE, if possible an equations related ,or any sources for getting idea on this .Pls help.THank u.: Means that someones going without any electicity tonight. A Transformer changes voltage. As in, The Thermostat in most homes workes off 24 volts. A Transformer will take 120 volts and drop it down to 24.

Q: A 8000kva transformer can bring the maximum load: A good transformer can work at full capacity. But affect the service life. It is best to 80% of the power of this transformer is the best.

Q: I am going to see Transformers tonight at an 8:00 pm showing. Do you think there will be a big line to see it? Should I show up earlier to get a good seat or do you think going a 1/2 hour before the show starts, like I usually do, will be enought time to get good seats?: I would think there will be a fairly long line for it. So I would say maybe go like 45 minutes to even an hour early just to be on the safe side of things. Good luck and hope you enjoy the movie, I know I cannot wait to see it.

Q: The specification states that the 35KV substation is capable of obtaining the power supply after the main transformer is powered down. Therefore, in this case, the transformer used should be connected to the power supply side of the circuit breaker. My question is that the main transformer which, the main transformer is not connected to the power supply side of the circuit breaker?: 1, the so-called main transformer or (plant) with transformers are transformers, but according to their use of different names. The so-called main transformer: generally in the power plant or substation are so called, its function is for the system through the required level of power transformer; the so-called (factory) with the transformer is inside (power plant interior) Electrical equipment to provide power transformer. 2, the (plant) with the transformer power supply connected to the main transformer on the same bus, and some received another external power supply, so that when the main transformer can be maintained when the maintenance (plant) to continue to have power!

Q: How many different types of transformers are there if anyone can remember from the cartoons?: well gee i watch the cartoons as much as i can and well from what i remember, the first few episodes from g1 (1984 series) there were like 15 autobots and 18 decepticons (i don't know exactly). And then in the Armada series if you don't include the dozens of mini-cons seen fighting unicron then i'd say only about 8 known autobots and then 10 known decepticons Tidal Wave Tidal Wave. and i didn't get to see much of energon but i suspect that there were a little more then in armada plus a few mini-cons seen here and there and then the hundreds of terrorcons and smaller number of omnicons (thse are the guys that collect the energon)

Q: I read comments on youtube saying avatar cg looks like computer games.I liked avatar cg. transformers cg looks more real but I don't think movies always have to look more real.: Avatar is really a wonderful epic movie. I love the CG cause they made the characters look more like the real actors, the place looks like an amazing paradise, and the story really touches my heart seriously although I know it's fiction. Plus the battle at the end is awesome, it's like when you watch Star Wars because you get to see these incredible creatures fighting machines and the human race

Q: And what are the prospects for Transformers 3? I mean, should i just skip it?I forced myself to watch Transformers Twice. Didnt care for it much, either time. Barely, BARELY passable.: I agree! I loved the first Transformers. But the second oneugh! The only thing I liked in that movie were the amazing special effects on the robots. Anyway, here are the reasons, it sucked: 1) Michael Bay did not follow the original script/story that screenwriters Orci and Kurtzman laid out. Here's what they said in an interview: We were very surprised when we saw it, too, and it’s a choice that was made. If anything, it just shows you that we don’t control every aspect of the movie. 2) Production was rushed to meet the premiere deadline. 3) Autobots got shoved to the side for more extended human drama military action. 4) Too much attention spent on CGI at the cost of crafting a good story or character development. 5) I really think Steven Spielberg (exec producer) had a hand creatively in Transformers 1. I guess he was really distracted by other things during the making of the sequel. Shia Labeouf sums it up perfect: We got lost. We tried to get bigger. It's what happens to sequels. It's like, how do you top the first one? You've got to go bigger. Michael Bay went so big that it became too big, and I think you lost the anchor of the movie. I suggest viewing Transformers 3 with very low expectations.

Q: about transformers: 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.

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