68MVA/500kV standby 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:		Coil Structure:	Toroidal
Coil Number:	3 Winding	Capacity:		Rated Voltage:	68MVA/500kV
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 the 68MVA/500kV standby transformer power plant, and matches well with the transmission capacity of UHV lines, which has wide prospect of application. Because of its large capacity and large volume, the whole transportation weight with nitrogen is about 200-490 tons, and due to the restricted transport conditions, the transportation becomes the critical issue for application of the 68MVA/500kV standby transformer power plant. In order to make the products applicable to any UHV substation in our country, the state grid of corporation of China set the "A study of easy-transport large capacity UHV 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 UHV 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 UHV transformer 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 UHV Transformer’s right at the first time once again filled the gap in the field of UHV transformer research after Chinese transformer industry overcame the difficulty of integral transport of the 68MVA/500kV standby 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 UHV construction application in our country, greatly improved the technical level and manufacturing ability of BTW in terms of UHV Transformer products.

Q:I have a standard transformer with 7 wires:2 black2 red2 yellow1 red/yellow stripedWhat connections do these wires correspond to?That is, which should connect internally to the primary coil, the secondary coil, and coil-taps (based on the number of wires, I assume that the secondary coil is tapped).I must determine this in order to connect the wires (externally) appropriately.Any help is greatly appreciated!: Transformer Wire Colors

Q:I would like to use this circuit to power arrays of high power LED'sI understand the properties required to power LED'sI have beginners knowledge in electric circuits and have done some research on this circuit. I have come across several posts stating it is dangerous to connect this circuit straight to mains power. I don't understand is what makes it is so dangerous?AndIf possible, how can it be made safe without using a transformer.: The neutral leg of the AC (assume the bottom on the diagram) is grounded to earth ground at the house service entrance and also at the center tap of the power pole transformer (in the US). If your project box was metal, and you had the 0 volt output attached to the metal case and happened to touch earth ground through you. You would get shocked since during the negative half cycle, positive voltage would go through ground, then you, the metal box, through D4, back to the AC hot (on the negative half cycle). Ouch! Always use an isolation transformer or any transformer where the secondary is not in any way tied to the primary. That way you can ground either dc lead from the rectifier to ground and not have to worry about electrocution.

Q:I just saw the movie and it has left me with a thirst for more on the story of transformersbut where can I turnComics, animated series?Thanks: Almost anywhere you go, you're going to get a slightly different story than what you got in the movie. If you really want something that fits in directly with the movie continuity, publisher IDW did a series of movie prequel comics which are probably available as a trade. For TV shows, the closest thing to what you saw in the movie is the original 1980's animated series, which is available on DVD. Beast Wars and Beast Machines both reference the 1980s cartoon (the former more than the latter) and Beast Wars at least is worth watching. Since then, there have been a number of largely terrible dubbed anime TransFormers shows airing in the US, which I would reccommend you skip. There are also a few shows that aired exclusively in Japan, of varying quality. And there's a new animated series coming out sometime next year which I think could be quite good. In terms of comics, you have the original Marvel series, some of which has been reprinted in trades, the Dreamwave series (which I personally did not care for), and the current IDW books, which I really enjoy. IDW covers a lot of different parts of the TransFormers mythos (G1, Beast Wars, movie, etc.) so you can pick what most interests you.

Q:Is the upper oil temperature of the transformer high or lower?: Of course, is the upper high, thermocouple generally installed in the top.

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?: Selection of main transformers Main transformer is mainly used for electrical system power supply, the general capacity of large, to ensure the reliability of electrical system power supply, improve the system impact resistance. 1, the number of the main transformer: In order to ensure the reliability of power supply, substation should be installed in general two main transformer. 2, the main transformer winding connection: 110KV using a direct grounding neutral point effective grounding system, using star wiring. If necessary, the use of triangular wiring by arc-suppression coil connected to the use of high-pressure side of the change. 35KV using arc suppression coil neutral point non-effective grounding system grounding point, the use of star wiring. 10KV generally use unattached system 3, the choice of the main transformer winding: China 110KV and above voltage transformer winding are used star wiring, 35KV also uses star wiring, 35KV following voltage transformer windings are triangular connection. 4, the choice of main transformer capacity: the main transformer capacity is generally based on substation built 5 to 10 years of planning load selection and take into account the late 10 to 20 years of load development, when a transformer outage, the remaining transformer capacity should Can guarantee 70% of the total load. The choice of choice Used to change the main power supply system, the capacity according to their own distribution load to choose. The number of units used to consider the general standby power supply, when there are two used when the variable, the use of single bus segment wiring, usually run to limit the scope of failure to improve the reliability of power supply. The power system uses 380 / 220V neutral point directly grounded three-phase four-wire system, power and lighting combined with a power supply.

Q:i study transformer and found calculation for pf for open/short circuit test. but the value is bit confusing.pf at open test: 0.182pf at short tets: 0.135what the value means??why we need that??: The power factor and reactive volt-amperes are only important as intermediate steps to calculating the values of the transformer's equivalent circuit component values. The pf determined in the open circuit test is related to the magnetizing reactance and core loss resistance. The power factor determined in the short circuit test is related to the primary plus secondary leakage reactances and winding resistances. The equivalent circuit component values are needed for various transformer performance calculations and for calculating the influence of the transformer on the complete circuit. I don't believe that the open circuit and short circuit pf and VARs are used for anything once the equivalent circuit has been determined.

Q:Hi there, I live in the Dallas, Texas area and we recently had a lot of storms come through. During one of the storms I was looking out a window to my backyard when I heard some thunder and saw some lightning hit the transformer right outside my backyard, which sent sparks everywhere. The power went out, but came on about a minute later.Ever since then (it's been about 24 hours) all the lights in the house have been dimmering every few minutes, some lights dimmer when you turn on appliances and one outlet went out randomly.: Hi, You should check out first with your neighbours and then with the power house. In case if the problem is with your lighting then you will need to get it fixed. You can opt for LED light bars as they are easy to install, consume less power and are long lasting. They are cost effective and reduce the cost of maintenance.They provide equal amount of light like the traditional sources of light while consuming less energy. So you can save on the electricity costsas well. Cheers

Q:I understand that a 70-volt transformer is used in a commercial environment, to connect several 70-volt speakers to a 70-volt amplifier. But why does a 70-volt transformer have all of those different colored wires coming from it? What do they connect to, and what are they for? How would I connect a 70-volt transformer to an amplifier, and where I connect the cable that goes to the speakers? Please explain this to me in an easy to understand way, because I was curious about this for a long time.: Briefly, the reason for the multiple wires is so that a given transformer provides the option to select any of a variety of output watts, depending on its application. In other words, instead of a system installer having 1/2W transformers for classrooms, 1/16W transformers for tiny study rooms, and 2W transformers for hallway speakers, they use mostly ONE type of transformer for the majority of the installation, and select appropriate “tap” settings for each speaker's application. These selection possibilities may or may not be marked on the transformer, however! I used to use transformers that had center-tapped dual primaries that could be connected either in various series or parallel combinations, providing a whole range of wattage possibilities. This was done by looking at the spec. sheet and using any of 8 or so different wattage hook-ups by interconnecting the appropriately colored wires. Not all were used, depending on the desired wattage. There were NO markings on the transformer itself, other than the part number! I don't know your situation (or your transformer), but in general: The 70-volt line output covers the distance to the transformer-plus-speaker location, the transformer wire taps are selected for the desired output wattage to the selected speaker, and the sum of all the speaker wattages must be less than that of the amplifier rating. However, knowing the matching transformer's capability and wattage selection scheme is a key element. With luck, the secondary is marked for the speaker impedance (“common”, 4-ohm, 8-ohm, etc.) and the primary is marked for wattage (“common”, 1/4W, 1/2W, 1W, 2W, 5W, etc.). With that type of transformer, the amplifier might connect between C and 5W, and the speaker between C and 8 for example but as I said, that's if you're lucky!

Q:1. If the input voltage is 100V and output voltage is 200V, which side of the transformer winding will be primary?(a) 100V side (c) winding with loss turns(b) 200V side (d) winding with more turns2. Which of the following statement about humming of transformer is true?(a) The frequency of humming tone is 100Hz(b) The frequency of humming tone is 50 Hz(c) The humming is caused by a vibration of the low voltage winding through which the high current flows(d) The humming is caused by the private force of attraction between the lamination of the core3. In a 10 KVA, 230/1000V 1-? transformer, the no load current will be around(a) 3 A(c) 10 A(b) 0.5 A (d) 0.9 A: Each turn produces about the same voltage, and the primary is the input side. 1. The input voltage is lower than the output voltage, so the input winding (primary) must have the lower number of turns. 2. If the line frequency is 50 Hz, then a and d, since the vibration force is proportional to the magnitude of the current, but not the direction, so both half cycles produce the same force and there are two cycles of force each voltage cycle. The main vibration forces involve the magnetic attraction between the laminations and their magneto-striction (change in dimension as magnetic flux magnitude varies) 3. The load full load primary current will be roughly the power divided by the voltage or 10,000/23043 A. The no load current will be a few percent of that current, but I do not know the typical fraction for a transformer of that size. My seat-of-the-pants guess is a, about 7%. -- Regards, John Popelish

Q:Do any adults play that game online anymore? I am 19, big fan of transformers since I was a kid watched the G1 series, Transformers prime, seen the michael bayfail movies and played all the games. I love TFFOC its a gream game, with great unique multiplayer and its in cybertron! I love it and can't wait for the next game as that will be on Earth!.I have been playing this game for quite a while now and everytime I put my headset/mic on and play a match online I always come across kids that are like 13 years old and get friend requests from them lol.Should I stop playing this game?: This Transformers Fall of Cybertron Retro Pack includes a classic G1 Optimus Prime skin (available in both single and multiplayer modes) as well as Generation 1 Megatron Gun and Shockwave Cannon (single-player only)

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