400MVA/220kV main transformer power plant

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Loading Port:: Tianjin

Payment Terms:: TT OR LC

Min Order Qty:: 1 pc

Supply Capability:: 1 pc/month

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Quick Details

Place of Origin:	HeBei	Brand Name:	CNBM	Model Number:
Usage:	Power	Phase:	one	Coil Structure:	Toroidal
Coil Number:	2 Winding	Capacity:		Rated Voltage:	400MVA/220kV
Connection Symbol:	YNd11 Dyn11 YNyn0d11	Tank:	Cover type or Bell type	OLTC:	MR or ABB or SMS

Packaging & Delivery

Packaging Detail:	Mainbody --naked Disassembled parts -- crate
Delivery Detail:	3 months

Specifications

1. CESI certificate
2. High short-circuit withstand
3. Low loss, PD and noise
4. CTQC certificate
5. No leakage

Description

The application of 400MVA/220kVmain transformer power plant can significantly improve the economy of the OLTC substation, and matches well with the transmission capacity of OLTC lines, which has wide prospect of application. Because of its large capacity and large volume, the whole transportation weight with nitrogen is about 470-490 tons, and due to the restricted transport conditions, the transportation becomes the critical issue for 400MVA/220kV main transformer power plant. In order to make the products applicable to any OLTC substation in our country, the state grid of corporation of China set the "A study of easy-transport large capacity OLTC Transformer” as a key scientific research projects, and entrusted BTW to carry out the research.

During the process of research and development, BTW adopted the advanced design technology and modular design, the transformer can be transported disassembly and with advantages of compact core and winding body, less transportation weight and low transportation cost, effectively solves the need of OLTC construction in the transportation restricted areas. By using the most advanced 3D magnetic field calculation software, BTW performed detailed analysis and calculation for the magnetic flux leakage and eddy current loss of the transformer coil, iron core and oil tank steel structures. Besides, by using of the advanced electric field calculation software, BTW performed detailed analysis and calculation of main longitudinal insulation, and mastered the arrangement of the main longitudinal insulation of large capacity OLTCtransformer and the control of distribution of winding magnetic flux leakage. All of which make the products with low loss, low noise, small volume, strong anti short circuit ability, no local overheating and other significant advantages, and guarantee the long-term safe and stable operation.

The world's first on-site assembled large capacity OLTC Transformer’s right at the first time once again filled the gap in the field of OLTC transformer research after Chinese transformer industry overcame the difficulty of integral transport of 400MVA/220kV main transformer power plant, which marks BTW has fully occupied the world transformer industry technical peak. The successful development of the product filled the gaps in the domestic technology and met the urgent need of OLTCconstruction application in our country, greatly improved the technical level and manufacturing ability of BTW in terms of OLTC Transformer products.

Q: Two different impedance of the transformer, parallel load how to allocate?: Two parallel operating impedance must be equal, because the parallel operation of the transformer load is inversely proportional to the impedance voltage distribution, if the impedance voltage difference is too large, will lead to the occurrence of excessive impedance voltage overload phenomenon is recommended to allow the difference is generally not more than 10% , The general formula is St1 = S * Zt2 / (Zt1 + Zt2), St2 = S * Zt1 / (Zt1 + Zt2), where Zt is the per unit value, Zt = Uk% * Sd / 100Sn Transformer (Transformer) is the use of electromagnetic induction principle to change the AC voltage of the device, the main components are primary coil, secondary coil and core (core). The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage regulator (magnetic saturation transformer) and so on. According to the purpose can be divided into: power transformers and special transformers (electric furnace change, rectifier, frequency test transformer, voltage regulator, mine transformer, audio transformers, IF transformers, high-frequency transformers, impact transformers, instrument transformers, electronic transformers , Reactors, transformers, etc.). Circuit symbols commonly used as the beginning of the number. Example: T01, T201 and so on.

Q: b)Describe an important industrial application of one of the above devices (apart from transformers)C)Explain how this device works-that is ,what the electricity actually does: A transformer is a device that allows you to easily and efficiently convert an AC voltage to a different voltage. When you do this, the current is converted in the opposite ratio. For example, if you have a 100 volt 1 amp source and you convert it to a 1000 volt source, it will have capability of 0.1 amp. It is made by winding wires on iron cores. See the reference for details. It is very important for the transmission of AC power, as it can be changed to a very high voltage for efficient distance transmission, and back to low voltage for use in homes. .

Q: Briefly explain how an alternating current transformer works and why they are so important to the world’s electrical power infrastructure.: Current transformers are used extensively in the power generating and distribution systems. A current transformer is a dough-nut shaped device, winding actually, that slips around the cable you wish to monitor. The primary of this device obviously has one winding. Current transformers are used in the protection of network to operate circuit breakers, metering devices, reverse power relays , all type of sequence relays, I could go on and on. The nice part about current relays is the use of them keeps extremely high voltages from being taken to the control section of the equipment, thereby protecting service personnel from being exposed to these high voltages. A common current relay used for this purpose is a 5 ampere output at the rated current flow through the cable being monitored. For instance a 100:5 ratio.

Q: I am building a high voltage RF transformer and I'm wondering what considerations I need to take in order to build it correctly.The transformer primary will be powered by a 12V square wave signal around 5-20kHz. The secondary needs to put out at least 1kV at very low amperage (in the mA range, the lower the better).What considerations I need to take into account in building the transformer?Thanks for all the help!: 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: I need to run 12 amps through a 5-ohm electromagnet which means 60 volts must fall across it. I am building a power supply bridge rectifier circuit to fit my needs. I have a transformer capable of handling the wattage requirements but I am having trouble figuring out the amount of turns on the transformer to have on both the primary and secondary. The primary will be connected to an American outlet and I just don't understand how to get 60 volts DC out since the AC RMS voltage will be different than the rectified DC voltage.: The transformer's primary should not disturbed, if possible. If not, then replace the primary wire using the same wire gauge and number of turns. The secondary winding needs a wire that handles about twice as much current as the primary's winding, which would require a wire that has twice the cross sectional area. I don't think that capacitor filtering of the bridge rectifier's output is necessary, but it would cause a lot of hum. If the capacitor is not used, the current and voltage feeding the magnet will be relative the average value (.63 of peak value), rather that the RMS value (.707 of peak value), Therefore, the peak value of the secondary winding would be 60/0.63 plus bridge rectifier drop or about 95 volts. Its RMS value is then 95*.707 67 volts and the turns ratio would be 67/102 .56 to 1.

Q: I am looking into purchasing a counter top coffee roaster that requires a 30 Amp 120 outlet; manufacturer says it uses about 21A.The only plug/circuit that can handle this load at this time is a 240 V outlet. We have a gas stove and we are not currently using the circuit.Does anyone know of a manufacturer that makes a external/freestanding step down (240 to 120) voltage transformer / regulator that I can plug into a grounded (North American) 220V outlet ? Note: a) I don't need it to be variable, just a fixed 240V to 120V is perfect. b)It would also need some sort of internal voltage regulation/ stabilization as erratic voltages would affect the (coffee) roast.: a regulator

Q: I think they can, especially since there has been a series of some sort in the US and/or Japan series on going since 1996. Here is the track record:The Transformers (1984-1987 season 1-4 in the US)Japan's cotinuation of G1:Transformers: Headmasters (1987)Masterforce (1988)Victory (1989)Zone (1990)Beast Wars: Transformers (1996-1998)Japan's continuation of Beast Wars:Beast Wars Second (1998)Beats Wars Neo (1999)Beast Machines (1999-2000)Transformers: Robots In Disguise (2001)Armada (2002-2003)Energon (2004-2005)Cybertron (2005-2006)Animated (2007-present)This also includes two movies with a third on the way:Transformers: The Movie (1986)Transformers (2007)Transformers: Revenge Of The Fallen (2009)They might not as long running and continuous as the Simpson but to me the franchise has a good case for being one of longest running series with all of its incarnations.: Not to downplay Transformers or their cultural impact on the world- but I'm going to disagree. Certainly Transformers is a world renown series, and has stayed active for an exceptionaly long time in a variety of different itterations- but I wouldn't QUITE go so far as to say it is one of the longest running although it is certainly more than most). I am assuming we are just talking about animated series too (since well, this is the animated section) because in the broad scope of ALL TV, then Transformers can't even light a candle to stuff like the Today Show or Sports Center which have both been going on for decades and have tens of thousands of episodes. But even if we are just looking at animated features, I would point to Sazae-san. That same series has been running since the 1960s and has thousands of episodes- and is still ongoing If we are looking at number of variations and types of shows, I'd say Mickey Mouse. He has countless movies and short films, and more than a few lengthy series that have been showing up for decades and decades still to come. And even if we are talking about animated series about robots- Gundam still has Transformers beat. It's been going on since ths 70s and has around twelve 25+ episode series, with dozens of specials and movies, and more than a handful of OAVs that range from a few episode on up to 13 or more. (absurd Gundam graph: anidb /perl-bin/animedb.pl?sho ) So yes, Transformers is quite exceptional- but there are just too many giants out there for me to consider it to be one of the longest.

Q: I needto know the full conditions of parallel operation of transformers including details about vector groups.: I am putting 1 QA for reference. Question If I parallel three 2MVA 22/11kV three phase 50Hz Dyn11 transformers of the same voltages, vector groups and impedances, do I connect all three star points to earth or only one star point to earth? If I want to put a resistance in the neutral connection to earth (NER), do I only connect one which is common to all three or a seperate NER for each? Answer Dear Dario, I will start with the imepdance: every transformer shall have its own because it is there to protect against internal faults as well. You may install only one impedance but that will depend on your protection devices and what they measure, i.e. where you put your CTs and VTs. These impedances must have a disconnect switch. For the first part, it is very general to me but i figure your load is large Medium Voltage motors (a mill), because 2MVA seems little for distribution and a Y secondary in MV is tricky. All neutrals shall be interconnected and connected individually to earth. This is for the case where the only link you have in mind is gone, the whole system will go float; so again, for the first part: all three star points shall be connected. If you're already protected against lightning, then you don't need limitation in surge voltage, i advise not to install a resistor and not connect N to E, i.e. go for an IT system which provides you with two benefits: fault currents are small and it take more than one fault to trip and cause discontinuity to the service,

Q: im building a step up transformer and im wondering if a 10:130 turn ratio would give me the same results a 100:1300 turn ratio. my specific questions are:1) Would i get the same power boost?2) If not, would it be similar or close to it?3) If not, why not?: I assume your question refers to an ideal transformer. The turns ratio is the turns ratio. 10/130 100/1300. A transformer won't boost the power since the power in power out. If it's a step-up transformer, the voltage is increased on the secondary side compared to the primary side by the turns ratio.

Q: The specific steps and procedures for installing the transformer: Hello, you said it should be the frequency transformer installation steps it. Steps are as follows: first equipped with skeleton Oh, and then use the winding machine around the enameled wire, and then add the fuse (if the customer specified to), then dip tin, dip tin is the dressing, the package is finished shake the film, shake the film is Plus shell, such a transformer to do a good job. I hope I can help you.

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