Voltage power mini transformer

The function of the voltage transformer 2113 is to transform the high voltage of 5261 into 100V or lower standard voltage of 4102 times for protection, measurement and instrument devices.

At the same time, the high voltage can be isolated from the electrical workers by using a voltage transformer.Although the voltage transformer is also a device that works according to the principle of electromagnetic induction, its electromagnetic structure is opposite to that of the current transformer.

The original coil of a current transformer is wound with a thick conductor and has only one or several turns, so its impedance is very small.When the original coil is connected in series to the circuit under test, the voltage drop at both ends of the coil is minimal.Although the number of turns of the secondary coil is large, under normal circumstances, its E2 electromotive force is not high, about a few volts.

Since I1/I2=Ki (Ki is called variable flow ratio), I1=KiI2

Thus, the current passing through the load is equal to the product of the current measured by the secondary coil and the variable current ratio Ki.If the ammeter is used in conjunction with a special current transformer, the ammeter can be graduated in terms of the current in the large-current circuit.

The maximum secondary current of the CT is usually designed as 5A.Different current circuits are equipped with different current transformers, whose converter ratios are 10/5, 20/5, 30/5, 50/5, 75/5, 100/5 and so on.