500MVA/765kV substation auto-transformer

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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:	Three	Coil Structure:	Toroidal
Coil Number:	3 Winding	Capacity:		Rated Voltage:	500MVA/765kV
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 500MVA/765kV substation auto-transformer 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 application of 500MVA/765kV substation auto-transformer. In order to make the products applicable to any substation in our country, the state grid of corporation of China set the "A study of easy-transport large capacity 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 500MVA/765kV substation auto-transformer, 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 OLTC Transformer products.

Q:I have a doorbell that quit working. I don't know how to tell if it is the bell or the transformer: It could be the switch as well! Unless you know about electricity, you would be better off hiring a handyman!! Or ask around, if a neighbor asked me I would help them out!

Q:Where is the transformer used?: You ask more general, there are many kinds of transformers, 1 is the power transformer, it is 10,000 volts drop to 380,220 V commonly used low pressure for us to use. Small transformers are 220V voltage reduced to household appliances used when the operating voltage rectified as electrical power. High-frequency transformers are generally used as switching power supply pulse output transformer. High-frequency signal transformer only a few turns of the coil, the transmission of high-frequency signal. Simply say this kind of bar, a wide range of various types of transformers.

Q:For my proposed new aluminium extrusion factory I ve the load of 250 kw heater and 670 HP of motors.Whats the kva rating of the transformer I should go for?Pls advice.: Your connected load is about 250 kW plus about another 700 kW (from the motors when taking into account efficency and Power Factor). So the total connected load is just under 1000 kw. This 1000 kw is about 1 MegaWatt ( MW). A MegaWatt is 1000 kW You want to oversize your transformer, to account for added load at a later time as well. If I was ordering the transformer, I would be looking at one to cover at least a 1.5 MW. This would be roughly a 1,500 kVA transformer. You could order one slightly smaller, and add cooling fans which come on at max loads to cool down the transformer and increase its kVA rating. Because you have a large motor load, you will likely need the full 1500 kVA unit, because of the Power Factor issues with motor loads. BTW --- there may be a 1 year lead time on ordering a transformer that size.

Q:how transformer came to know that it has to draw lagging current during summers: A transformer on open circuit is just an inductance and that will draw a small lagging (magnetising) current in that operation mode. On load, the phase of the current drawn will depend on the load. If the load is capacitive then the transformer may well draw a net capacitive current. The small inductive contribution due to the magnetising current will still be there but may be subordinate to the load. The season is of no significance.

Q:how to calculate the secondary current of the transformer for example 1200 amps in primary ,primary voltage is 220kv and the secondary voltage is 34.5 kv of the transformer .: For an ideal transformer, the voltage ratio is set by the turns ratio, so the transformer is a stepdown with the ratio of 220/34.5. The current ratio is also set by the turns ratio, but current goes up as voltage goes down, so the secondary voltage is 1200 x (220/34.5). Again, for an ideal transformer only.

Q:Transformer voltage range of 10.5 ± 2 * 2.5% kV and 10.5 ± 5% kV What is the difference: 1, the voltage range is the same, are 10kV ± 5%; 2, the difference is that the accuracy of different voltage regulator, 10.5 ± 2 * 2.5% kV transformer sub-switch has five stalls, respectively, 10.5 +5% kV, 10.5 + 2.5% kV, 10.5kV, 10.5-2.5% , 10.5-5% kV; and 10.5 ± 5% kV transformer section switch has three stalls, respectively .5 +5% kV, 10.5kV, 10.5-5% kV; 3,10kV transformer sub-switch three more for the power failure regulator transformer, and sub-section switch five for overload regulator of the transformer, relatively speaking, the fifth gear than the third gear section switch Much more complex, so the price should be slightly higher for the load change is relatively large, the voltage quality requirements of the relatively high important occasions.

Q:How we can check the output wattage of any voltage transformer? For example if we buy a voltage stabliser for television or A/C, how we can be certain that the output watts provided by the stabiliser will suit our appliance? Is there any device to check the output watts, if yes, then how to?Please help.: Watts is the volts x amps. You will know the supply voltage and you can use an amp meter to find out the amps. For example 230V x 3A is 690 Watts.

Q:I watch Terminator Salvation first, it was really good I thought. The best part of the movie, I thought, was when T-800 turns evil again and attacks John. It took both John and Kyle to beat T-800.But other than that, I didn't really enjoy Transformers 2. Neither did I make plans to watch it, and I thought they should've dropped Megatron as one of the villains again. I thought it was average.But which is the better sci-fi movie of the year? (I think Star Trek is, but that's out of the question.): I thought Transformers was the better movie. There's a lot of history and storyline involved, but even if you don't know all of it, the movie is still very good.

Q:I fried a transformer in my lathe. I went to the electrical supply near my house and the got me a new transformer and said it will work. The old transformer is 3 times bigger. they are both 100VA. the voltage on the original is 230v in and 100v out. It powers the on/off switches for the forward/ reverse micro switches. from the micro switch it powers the magnetic puill in for the contactors. The contactor say 100V.will using a 110v transformer cause and problems or issues?Should I return the one I purchased and order a 100V ?I have work piled up and waiting and really need this lathe operational ASAP.Thank You in advance for any information.Earle: It should be fine. A 10 increase in voltage will create about a 10 % increase in current through your contactor coils and control switches. This is generally well within the safe limits of electrical design.

Q:The difference between the reflection impedance of the ideal transformer and the hollow core transformer is different.: The reflection impedance of the hollow core transformer reflects the influence of the secondary circuit on the primary circuit through the mutual inductance. The reflection impedance is in series with the self-impedance of the primary circuit. The reflected impedance of the air-core transformer is opposite to the reactance characteristic of the secondary circuit impedance.

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