Three-phase transformer can exchange current it, such expertise, only a few of the science excellence talent to understand it, it consists of iron core and coil composition, of course, the coil has more than two oh! The use of three-phase transformer, the altitude can never be lower than five thousand meters, the temperature environment can not be higher than forty-five degrees Celsius, about humidity, I think less than ninety percent is the perfect choice. Of course, the installation of three-phase transformers must be away from the chemical nature of the while it, otherwise there will be dangerous it.
Three-phase transformers are widely used in AC 50Hz to 60Hz, voltage 660V below the circuit, widely used in the import of important equipment, precision machine tools, mechanical and electronic equipment, medical equipment, rectifier, lighting and so on. Products of various input and output voltages, coupling group, adjust the number and location of taps (generally ± 5%), the distribution of winding capacity, secondary single-phase winding equipment, rectifier circuit, whether the use of the request with the shell, etc., can be based on the user's requirements of the careful design and manufacture.
In the three-phase transformer to establish a new center line - grounding can be lifted from the grid *** mode interference and other center line of the trouble, three-phase transformer will be three-wire △ wiring converted to a four-wire Yo system, plus shielding will be further exempted from internal coupling of high-frequency impulse interference from the transformer and the noise, although there are shielded three-phase transformer to a variety of N-G to the interference (impulse and high-frequency noise) can be effectively prevented, but the transformer must be correctly and properly grounded, whether to require a shell, etc. can be carefully designed and manufactured according to user requirements. But the transformer must be properly grounded or anti-*** mode interference will be ineffective.
Transformer is to change the AC voltage, current and impedance of the device, when the primary coil AC current, the iron core (or core) in the AC flux, so that the secondary coil induced voltage (or current). With the continuous development of the transformer industry, more and more industries and enterprises use the transformer, more and more enterprises into the transformer industry, the transformer by the iron core (or core) and coil composition, the coil has two or more than two windings, which is connected to the power supply of the winding called the primary coil, the rest of the windings called the secondary coil.
Transformer Parameter Variables
Views: three-phase transformer parameter variables several non-primary parameter variables note, three-phase transformer parameter variables
1 rated power Being the frequency and voltage, the characteristics of the current transformer sign parameter variables
2 rated voltage The axe in the transformer's coils of the promised voltage. Transformer can work for a long time, without exceeding the temperature rise of the output power.
3 voltage ratio refers to the ratio of transformer high voltage and secondary voltage, no no-load voltage ratio and load voltage ratio difference.
4 work frequency transformer core injury consumption with frequency relationship is very large, it should be in accordance with the use of frequency to envision and use, that kind of frequency is called work frequency.
5 rate refers to the secondary power P2 to primary power P1 ratio of the percentage. As long as the transformer's rated power is greater, the rate is higher.
6 no-load injury refers to the transformer when the secondary open, is higher measured power injury. Non-major injury is the core injury, followed by no-load current is the original coil copper resistance on the injury (copper loss) that department of injury is small.
7 no-load current three-phase transformer secondary open when there is still no certainty of the current, that sector of the current is called the no-load current. No-load current by the magnetization current (flux) and iron loss current (caused by the core injury). For 50Hz current transformer, the no-load current root level is higher than the magnetizing current.
8 Insulation resistance private illustration of the transformer between the coils, between the coils and the core of the insulation function. Insulation resistance is related to the function of the insulating material utilized, temperature and humidity.
Power calculation:
U is the line voltage, I is the line current, apparent power: S=1.732UI, active power: P=ScosΦ, reactive power: Q=SsinΦ, power factor: cosΦ=P/S.
Three-phase power = 3-way single-phase power aggregation
Three-phase rated power = Root III x rated current x Rated line voltage (380V) = 3-phase × rated current × rated phase voltage (220V)
That is: ?P = 1.732 × I × U line = 3 × I × U phase
Three-phase transformers are widely used in many places, such as textile machinery, printing and packaging, industrial and wide range of enterprises and so on it. Of course, the most used must be household appliances and high-rise buildings. Think about it, three-phase transformers are so widely used, can be said to be the power of super strong, unparalleled. Such a high degree of isolation performance has a good transformer to go where to find it? Of course, three-phase transformers! At home as long as there is a three-phase transformer, what is there to be afraid of? Resistance and voltage are not a problem.