secondary winding - French translation – Linguee
A module of a primary voltage is calculated based on a measured secondary voltage, which a primary current, its own secondary winding to have a secondary voltage Chacun de ces postes MT/BT est lui-même connecté sur une ligne moyenne .. the closer the relationship between the current primary and secondary. Many translated example sentences containing "primary winding" couples the secondary winding (7) to the antenna winding (3) follows the relationship MSA. A transformer is basically two coils of wire (inductors) sharing a common core. If you don't connect a load to the secondary you might as well.
If the direction of the field is reversed, the domains must turn so that their poles are aligned with the new direction of the external field. Power transformers normally operate from either 50 Hz, or Hz alternating current. Each tiny domain must realign itself twice during each cycle, or a total of times a second when 50 Hz alternating current is used. The energy used to turn each domain is dissipated as heat within the iron core.
Hysteresis loss can be held to a small value by proper choice of core materials. The input power is equal to the product of the voltage applied to the primary and the current in the primary. The output power is equal to the product of the voltage across the secondary and the current in the secondary. The difference between the input power and the output power represents a power loss.
You can calculate the percentage of efficiency of a transformer by using the standard efficiency formula shown below: If the input power to a transformer is watts and the output power is watts, what is the efficiency? Hence, the efficiency is approximately The voltage, current, and power-handling capabilities of the primary and secondary windings must also be considered.
The maximum voltage that can safely be applied to any winding is determined by the type and thickness of the insulation used.
When a better and thicker insulation is used between the windings, a higher maximum voltage can be applied to the windings. The maximum current that can be carried by a transformer winding is determined by the diameter of the wire used for the winding. If current is excessive in a winding, a higher than ordinary amount of power will be dissipated by the winding in the form of heat.
This heat may be sufficiently high to cause the insulation around the wire to break down.
If this happens, the transformer may be permanently damaged. The power-handling capacity of a transformer is dependent upon its ability to dissipate heat. If the heat can safely be removed, the power-handling capacity of the transformer can be increased.
This is sometimes accomplished by immersing the transformer in oil, or by the use of cooling fins. The power-handling capacity of a transformer is measured in either the volt-ampere unit or the watt unit. Two common power generator frequencies 50 hertz and hertz have been mentioned, but the effect of varying frequency has not been discussed.
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If the frequency applied to a transformer is increased, the inductive reactance of the windings is increased, causing a greater ac voltage drop across the windings and a lesser voltage drop across the load.
However, an increase in the frequency applied to a transformer should not damage it.
What is the core type and shell type transformer?
But, if the frequency applied to the transformer is decreased, the reactance of the windings is decreased and the current through the transformer winding is increased. If the decrease in frequency is enough, the resulting increase in current will damage the transformer.
For this reason a transformer may be used at frequencies above its normal operating frequency, but not below that frequency. A brief discussion of some of these applications will help you recognize the importance of the transformer in electricity and electronics.75 - Primary Partners and Priority in Polyamory
These transformers have two or more windings wound on a laminated iron core. The number of windings and the turns per winding depend upon the voltages that the transformer is to supply. Their coefficient of coupling is 0. You can usually distinguish between the high-voltage and low-voltage windings in a power transformer by measuring the resistance.
The low-voltage winding usually carries the higher current and therefore has the larger diameter wire. This means that its resistance is less than the resistance of the high-voltage winding, which normally carries less current and therefore may be constructed of smaller diameter wire. So far you have learned about transformers that have but one secondary winding.
The typical power transformer has several secondary windings, each providing a different voltage. The schematic symbol for a typical power-supply transformer is shown in figure For any given voltage across the primary, the voltage across each of the secondary windings is determined by the number of turns in each secondary. A winding may be center-tapped like the secondary volt winding shown in the figure.
To center tap a winding means to connect a wire to the center of the coil, so that between this center tap and either terminal of the winding there appears one-half of the voltage developed across the entire winding. Most power transformers have colored leads so that it is easy to distinguish between the various windings to which they are connected.
Carefully examine the figure which also illustrates the color code for a typical power transformer. Usually, red is used to indicate the high-voltage leads, but it is possible for a manufacturer to use some other colors. There are many types of power transformers. They range in size from the huge transformers weighing several tons-used in power substations of commercial power companies-to very small ones weighing as little as a few ounces-used in electronic equipment.
Note that a single coil of wire is "tapped" to produce what is electrically a primary and secondary winding. The invention also relates to a transformer station of a first electric current having a first AC voltage into a second electric current having a second AC voltage, comprising: These features and advantages of the invention will become apparent from reading the description which follows, given by way of example, and with reference to the accompanying drawings, wherein: The processing station 10 is adapted to transform the electric current I1j issued by the network 12 and having a first AC voltage u1j, into an electric current I2j having a second alternating voltage U2J.
The grid 12 is an alternating current network comprising P phases where P is an integer greater than or equal to 1, such as a three-phase network.
Transformer - Wikipedia
The grid 12 is a medium voltage network, that is to say a network whose voltage is greater than V and less than 50 V. The first phase voltage is then u1j an average voltage. Each supply lead 26A, 26B, 28A, 28B, 30A, 30B is connected to the power line 12 via for example a respective incoming circuit breaker The three-phase current flowing in the arrival I1j conductors 26A, 26B, 28A, 28B, 30A, 30B corresponding presents the first phase voltage u1j.
The first arrival of conductors 26A, 26B, the second arrival conductors 28A, 28B, the third arrival conductors 30A, 30B are connected to a first primary conductor 32 connecting respectively a second primary connection conductor 33 and a third primary connecting conductor These primary connecting conductors connect arrivals 24 to the actuator 20 of the transformer The second table 16 comprises a first 35, second 36, third 37, fourth 38 and a second connecting conductor and a plurality N of departures 40A, 40B, The second conductor connecting 35, 36, 37, 38 connect the transformer 18 to departures 40A, The second phase voltage U2J then a low voltage.
The first departure 40A includes first 42A, 44A a second, a third and a fourth 46A 48A from conductors and three starting circuit breakers The first, second, third from conductors 42A, 42B, 42C are respectively connected to first, second and third secondary conductor connection 35, 36, 37 through a starting switch 50 corresponding.