SZ9-200~2500/11KV Three Phase On-load Pressure Regulating Power Transformer

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SZ9-200~2500/11KV  three phase on-load pressure regulating power transformer is suitable for distribution saatem with 10KV,50HZ for industrial and mine enterprise ,power illumination .it confirms to GB1094<power transformer> standard.

SZ9-200~2500/11KV  three phase on-load pressure regulating power transformer.can ajust automatically volatage underload condition according to electric grid voltage fluctuation to improve power supply quality,its performance parameter reaches international advanced level of 90s similar product,it has strongpoint of advanced workmanship,novel design.nice appearance and less groung demand.

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Q:Why is the transformer coil insulation?
Insulation grade refers to the heat resistance of the insulation material used, divided into A, E, B, F, H grade. Allowable temperature rise is the limit of the temperature of the motor compared to the ambient temperature. Insulation temperature Class A Class E Class B Class F Class H Maximum allowable temperature (° C) 105 120 130 155 180 Winding temperature limit (K) 60 75 80 100 125 Performance reference temperature (° C) 80 95 100 120 145 Generators and other electrical equipment, the insulation material is the most weak link. Insulation material is particularly susceptible to high temperature and accelerated aging and damage. Different insulation materials have different heat resistance, the use of different insulation materials, electrical equipment, the ability to withstand high temperatures are different. So the general electrical equipment is specified in the maximum temperature of its work. According to the different insulation materials to withstand the high temperature of its ability to set the maximum allowable temperature of seven, according to the temperature size were: Y, A, E, B, F, H and C. Their allowable operating temperatures are: 90,105,120,130,155,180 and 180 ℃ above. Therefore, Class B insulation indicates that the insulation temperature of the generator used is 130 ° C. The user should ensure that the generator insulation does not exceed the temperature during operation of the generator to ensure proper operation of the generator. Insulation class for the B-class insulation material, mainly by the mica, asbestos, glass fiber by the organic glue or impregnated from. Commonly used B-class insulation materials are PVC glass fiber casing (yellow wax tube), 6520 composite paper, DMD insulation paper.
Q:What is the meaning of the high voltage side and the low side of the transformer?
In general, the "high voltage side" refers to the "side of the high voltage side" (high pressure side) "low side" from the power supply to the primary side of the transformer (low voltage outlet) The From the wiring is also basically able to distinguish: high side (into the end) is generally "△" connection, low side (outlet) is generally "Y" connection.
Q:Rated capacity of three-phase transformer S = √3 * U * I
So, when calculating the three-phase load, U is the line voltage, and I is the line current. S = 1.732 (root 3) UI. S = 3UI. Where U is the phase voltage and I is the phase current. S = 1.732UI where U is the line voltage and I is the line current. Two methods, the same result.
Q:How to understand the secondary side of the transformer
Primary side, is the primary, is connected to a fixed power grid. Secondary side, secondary conversion into what we need, or the power needed by the device. Secondary side output also has high pressure and low pressure points. The principle is that the transformer becomes the voltage we need to use.
Q:Transformers have any way of cooling
Selection of strong air-cooled cooling mode, when the pump and fan lose power supply, the transformer can not run for a long time. Even if no load can not run for a long time. Therefore, two separate power supplies should be selected for use by the cooler.     When the oil-water cooling method is selected, it can not be operated when the pump cooling water loses power. The power supply should select two independent power supplies.
Q:What is the vacuum impregnation of the transformer?
In addition, if the conditions can also be limited if the transformer high temperature dipping (100 ~ 120 degrees), you can play the same effect
Q:Transformer secondary side is high pressure or primary side is high pressure
Step-down transformer primary side is high pressure, secondary side is low pressure. The step-up transformer is just the opposite. Step-down transformer reverse use is the step-up transformer.
Q:Why the new operation of the transformer to be charged
New installation or overhaul after the transformer, have to carry out the explosion test, test the performance of the transformer. The general impact of 3 to 5 times, the first impact of transmission for about 15 minutes, after every 5 minutes each time the impact of a time, about 10 minutes each time.       1, test transformer insulation, mechanical strength can withstand the impact of working voltage and excitation inrush.       2, test whether the transformer differential protection can avoid the impact of inrush current.
Q:What is the SN on the transformer? What is the difference between it and the actual power of the transformer?
SN is the rated capacity of the transformer, the capacity is also called the apparent power. It represents the maximum power that the transformer can transmit in the rated state, that is, the maximum power that the transformer can transmit when the power factor is 1 is SN kW. Transformers are only used to transmit power, in addition to their own no-load loss and load loss, the power does not consume. The actual power it delivers depends on the load. Transformer: 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). In electrical equipment and wireless circuits, commonly used as lifting voltage, matching impedance, safety isolation and so on. The main functions are: voltage conversion, current conversion, impedance conversion, isolation, voltage regulator (magnetic saturation transformer) and so on. According to the use can be divided into: distribution transformers, power transformers, sealed transformers, modular transformers, dry-type transformers, oil-immersed transformers, single-phase transformers, electric transformers, rectifier transformers.
Q:This transformer outputs AC or DC
If you have 220V output voltage, then the peak voltage of the waveform is 220 * 1.414 = 311v, then your rectifier at least reverse voltage of not less than 400V, then the voltage is not more than 400V The Look at your transformer current, if the full load current is 7A, then your rectifier load capacity should not be less than 10A. So the main consideration is the rectifier voltage and current these two aspects.

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