s9 s11 10KV grade oil type transformer

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Product Description:

10KV GradeS9, S11 series of oil-immersed power transformer

1. Model

---------------------------------product code (D: Single phase, S: three phase,


---------------------------------performance code (7, 8, 9, 10, 11, 12)

---------------------------------special usage or special structure code (M-hermetically sealed

                                                       R: wound core)

---------------------------------rated capacity KVA

---------------------------------voltage class KV

---------------------------------special application environment code (GY: plateau

WF: anticorrosion TA: dry tropics TH: humid tropics)

2. General

The three-phase oil-immersed distributing transformer applies new type insulating structure and makes short-circuit resistance strong. The iron core is made of high-quality cold-rolled silicon-steel plate. High voltage winding group is made up of high-quality oxygen-free copper lines and it adopts multilayered drum type structure. All fasteners have been processed with special treatment to prevent them from loosening.

As high-tech product that promoted by the country, the product has many advantages such as high efficiency, low loss. Its social benefits are remarkable that it will save much of electricity consumption and operating cost.

1. Technical parameters

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Q:What is the vacuum impregnation of the transformer?
To complete the winding and core assembly of the transformer, into a special dipping tank, the first vacuum, then open the lacquer,
Q:KW how to know how much transformer?
You said KW, it should be refers to the active power of the. Select the transformer depends on the nature of your load, and what type of load, such as emotional load, or resistive load? If it is purely resistive load (very little), then the transformer capacity to choose the same as your load can be, if it is emotional load, then according to the formula S × cosφ ≥ P can be. Calculated after the election can be selected transformer, the general will leave a margin of more than 5%.
Q:What is the unit of the transformer?
KVA instead of KW? VA or KVA is the apparent power, AC line used, also known as the capacity, that is, voltage and current rms product, the unit ... but will affect the load design of the transformer, so use VA or KVA to calculate more accurate. And W or KW is our usual habit of the law, written formal.
Q:What is a transformer paused?
5. Users who charge the basic electricity charges according to the maximum demand shall apply for the suspension of all the capacity (including high-voltage motors that do not pass the receiving transformers) and comply with the relevant provisions of Clauses 1 to 4 of this Regulation.
Q:Can a transformer make a small voltage change?
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:What is the main purpose of the transformer?
If the secondary connected to the load, the secondary coil to generate current I2, and thus produce magnetic flux ф2, ф2 and ф1 opposite the direction, played a mutual offset effect, so that the total magnetic flux in the core has been reduced, so that the primary Self-induced voltage E1 reduced, the result is I1 increase, showing the primary current and secondary load are closely related. When the secondary load current increases when I1 increases, ф1 also increases, and ф1 increase part of the part is just to be replaced by ф2 that part of the magnetic flux to keep the total magnetic flux in the core unchanged. If you do not consider the loss of the transformer, you can think of an ideal transformer secondary load power consumption is the primary power from the power supply. The transformer can change the secondary voltage by changing the number of turns of the secondary coil as needed, but can not change the power that allows the load to be consumed.
Q:What is the M of the transformer capacity MVA?
MVA with a table of his capacity, read: trillion volts in which M with a sign The conversion unit is 1MVA = 1000KVA = 1000000VA
Q:Why 21 lighting transformers must use double-winding safety isolating transformers,
The double-winding type safety isolating transformer has two windings which are input (primary) windings and output (secondary) windings, and the two windings are insulated from each other, only by magnetic connection, that is, secondary Winding and the earth does not constitute a loop, if the use of additional insulation appliances, you should use a safe isolation transformer. And since the lotus transformer all of its winding are connected, by sliding the position of the contact to change the size of the voltage. Therefore, the autotransformer primary winding (power circuit) and the secondary winding (power supply circuit) is not only between the magnetic connection, as well as the direct connection of the circuit. It and the earth constitute a loop, so it can not be used as a safe voltage power supply. Therefore, the safety regulations: lighting transformers must use double-winding type safety isolation transformer, prohibit the use of autotransformers.
Q:What is the meaning of auxiliary transformer, sub-variable and box change
During the main transformer failure or overhaul, the auxiliary transformer provides the substation's own electricity. Maintenance of substation lighting, high and low voltage switch action, with the cabinet switch operation, for instrumentation and automatic control system work, sub-change can be box change,
Q:What are the malfunctions and abnormal operation of the transformer?
working principle: Transformer is the use of electromagnetic induction principle made of static appliances. When the transformer's original coil connected to the AC power supply, the core will produce alternating magnetic flux, alternating magnetic flux with φ said. The original, the secondary coil φ is the same, φ is also a simple harmonic function, the table for the φ = φmsinωt. By Faraday's law of electromagnetic induction, we can see that the induced electromotive force in the original and secondary coils is e1 = -N1dφ / dt, e2 = -N2dφ / dt. Where N1, N2 is the original, the number of turns of the secondary coil. U1 = j1n1, U2 = E2 = -jN2ωΦ, and the complex value is U1 = -I1 = jN1ωΦ, U2 = E2 = -jN2ωΦ, and the complex value is U1 = Let k = N1 / N2, said the variable ratio of the transformer. U1 / U2 = -N1 / N2 = -k, that is, the ratio of the original value of the transformer and the secondary coil voltage, is equal to its turns ratio and the difference between the original and the secondary coil voltage is π. And then come to: U1 / U2 = N1 / N2 In the case of no-load current, I1 / I2 = -N2 / N1, that is, the original and secondary coil current RMS value is inversely proportional to the number of turns, and the phase difference π. And then available I1 / I2 = N2 / N1 Ideal transformer original, vice coil power equal P1 = P2. Indicating that the ideal transformer itself without power loss. The actual transformer always has the loss, its efficiency is η = P2 / P1. Power transformers are highly efficient and up to 90%.

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