SZ9 ON-load Tap-changer Power Transformer

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Q:The type of transformer and where the different transformers are used
Q:In the transformer load calculation to be calculated when the fire pump
The fire pump is not included in the normal operation of the transformer load, because when the fire pump is running, but also when the fire, the other load had to stop. The usual fire pump test check, the pump start running time is very short, the transformer allows a short time overload.
Q:10 (6) /0.4kv three-phase transformer what does it mean
Therefore, the decision to 60 and 35kV winding connection to be careful when the connection must meet the transmission system voltage phasor requirements. The connection between 60 and 35kV windings is determined according to the relative relationship of the voltage phasors. Otherwise, even if the capacity of the voltage ratio is also right, the transformer can not be used, connected wrong, the transformer can not be connected with the transmission system. 3). Domestic 10,6,3 and 0.4kV transmission and distribution system phase also has two phases. In the Shanghai area, there is a 10kV and 110kV transmission system voltage phase difference of 60 ° electrical angle, this time can be used 110/35 / 10kV voltage ratio and YN, yn0, y10 connection three-phase three-winding power transformer, but limited Three-phase three-core core. 4). But note that: single-phase transformer in the combination of three-phase group connection, can not use YNy0 connected three-phase group. Three-phase shell-type transformer can not use YNy0 connection.
Q:A 8000kva transformer can bring the maximum load
A good transformer can work at full capacity. But affect the service life. It is best to 80% of the power of this transformer is the best.
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:The difference between transformer power kva and kw
Kva is apparent power, KW is active power. inspecting power: S = 1.732UI = 1.732 × 0.38 × 100 ≈ 65.8 (Kva) Active power: P = 1.732UI cosφ = 1.732 × 0.38 × 100 × cosφ
Q:Proteus transformer how to adjust the parameters, the 220V into 14V output.
2, in the Proteus simulation diagram, double-click the transformer symbol, open the transformer parameter settings dialog box, which                 Primary Inductance 1H (set: can be fixed)                 Secondary Inductance 0.00406H (set by press)
Q:How to increase the transformer output current
2, Transformer (Transformer) is the use of electromagnetic induction to change the principle of AC voltage 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 temperature of the dry-type transformer?
Dry-type transformers are generally 130 ° C alarm. Most dry-type transformers now use H-class insulation. Under normal circumstances, the normal operation of the transformer temperature control control settings: 80 ℃ automatic fan, 100 ℃ automatic fan, 130 ℃ high temperature alarm, 150 ℃ high temperature trip. National standard "dry-type transformers" GB6450-1986 on the dry-type transformer temperature limit to make the provisions. 1, the dry-type transformer coil: A. The use of A-class insulation material, the limit operating temperature at 105 ℃, the maximum temperature rise should be less than 60K; B. When using E-class insulation material, the maximum working temperature at 120 ℃, the maximum temperature rise should be less than 75K; C. When using B-class insulation material, the maximum working temperature at 130 ℃, the maximum temperature rise should be less than 80K; D. When using F-class insulation material, the maximum working temperature at 155 ℃, the maximum temperature rise should be less than 100K; E. When using H-class insulation material, the maximum working temperature at 180 ℃, the maximum temperature rise should be less than 125K; F. When using C-class insulation material, the maximum working temperature at 220 ℃, the maximum temperature rise should be less than 150K. 2, the core, metal parts and adjacent materials, in any case, shall not appear to make the core itself, other parts or adjacent materials damaged by the temperature. Now most of the dry-type transformers are used H-class insulation material, it is generally said that the dry-type transformer temperature should be below 180 ℃.
Q:220 volts to 24 volts transformer 20a is how many watts
Transformer consists of iron core (or core) and coil, the coil has two or more than the winding, which connected to the power supply winding called the primary coil, the rest of the winding called secondary coil. It can transform AC voltage, current and impedance. The simplest core transformer consists of a core made of soft magnetic material and a coil of two turns on the core, as shown in the figure. Turn left to turn right The role of the core is to strengthen the magnetic coupling between the two coils. In order to reduce the iron in the eddy current and hysteresis loss, the core from the painted silicon steel sheet laminated; between the two coils there is no electrical connection, the coil by the insulated copper wire (or aluminum) A coil connected to the AC power supply is called the primary coil (or the original coil), and the other coil is called the secondary coil (or secondary coil). The actual transformer is very complicated, inevitably there is copper loss (coil resistance heating), iron loss (core fever) and magnetic flux leakage (by air closed magnetic induction line), etc., in order to simplify the discussion here only describes the ideal transformer. The ideal transformer is set up under the condition that the leakage flux is ignored and the resistance of the original and secondary coils is ignored. The loss of the core is ignored and the no-load current is ignored (the current in the secondary coil turns the original coil). For example, when the power transformer is running at full load (the secondary coil output rated power) is close to the ideal transformer situation.

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