Transformers are divided into voltage transformers and current transformers. Voltage transformers can be used for voltage and power measurement in HV and UHV power systems. Current transformers can be used for measurement of exchange current, measurement of exchange intensity and protection of electric drive lines.

There is some difference between the current transformer and the voltage transformer.

The current transformer is composed of a closed core and coils. Because of current transformer coil circle number is very little at a time, so the string in the line of need to measure current it often have all the current flows through the circuit, the current transformer secondary coil circle number is more, the secondary coil of current transformer in the concatenated while he was working in the measuring instrument and protection circuit, can make it 2 times is always closed loop, Therefore, the resistance encountered by the measuring instrument and the protection loop in the series coil is relatively small, and the current transformer is equivalent to a short circuit.

The voltage transformer is mainly composed of primary and secondary coils, as well as iron core and insulation. It is a transformer with iron core. If a flux φ is created in the core, it means that a voltage U1 is applied to the coil. According to the magnitude of the induced electromotive force generated in the conductor coil is proportional to the number of magnetic field lines cut by the coil per unit time, a secondary voltage U2 will be generated in the secondary coils. By changing the number of turns of the primary or secondary coils, different primary voltage to secondary voltage ratios can be generated, which can form voltage transformers with completely different ratios. The voltage transformer can convert high voltage into low voltage proportionally, that is, 100V. The voltage transformer is connected to the primary system at the primary side, and to the measuring instrument and relay protection at the secondary side

Hefei Mycoil Technology Co.,Ltd(MCT) specializes in the production of various precision current transformers and small current transformers, which are customized for the majority of users and provide fast and high-quality services.If you have any interests and need more information, welcome to contact us at any time.

Email: sales008@mycoiltech.com

Sales engineer: Bob Bao
Tel: +86 551 6291 5885