The electric transformer is some kind of converter of a system of alternating current of one tension by means of electromagnetic induction in the system of alternating current of other tension. There is it, as a rule, without significant power losses and with an invariable frequency. The transformer consists of several wire isolated windings which are captured by the general magnetic flux. They are reeled up on the core or a magnetic conductor made of ferromagnetic soft material.
Instruction
1. Perhaps, to measure by the most certain and easy way the power of the transformer the sum of power of all secondary windings is. Power of a winding in itself presents the work of current on tension. For this purpose measure resistance of a secondary winding from which transformer power is defined. In case there is no suitable ohmmeter, load on ballast and measure drawdown of tension on which estimate winding resistance. Use the following formula: Robmotki = Rshunta * (shunt Ubez - Una the shunt) / Una the shunt.
2. In addition option, it is possible to determine the power of the transformer and by wires. For this purpose load a secondary winding and at the same time control a current form in primary winding. As soon as there are peaks, count the power of secondary windings.
3. Many producers determine dimensional power as the maximum measured power in loading. In this case heating of windings is measured in the contact way, at the same time in the set mode the heating should not exceed totally hundred five degrees. Usually this temperature is calculated for commercial insulating materials. To make stronger heating it is fraught.
4. And one more option of measurement of power of the transformer. As powerful windings two, you load them without rectifier by means of resistors both at once, at the same time lower resistance until tension considerably does not decrease, approximately for ten percent. Surely you look behind a warming up. If in twenty minutes of such tests the transformer heated up not strongly, then load current can be increased still.
5. If tension strongly "sinks", and the transformer does not heat up, it means only one – existence of a thin wire. Such way gives estimates the power of the ready transformer. In the reference book it can differ from dimensional power considerably.
6. All considered options can be used for measurement of power of the transformer, but at the same time it is worth approaching attentively this process in terms of safety.