Transformer and transformer are the same work principle, the use of electromagnetic induction principle to work. The role of the transformer is to transform the voltage of a class into a different level of the same frequency voltage, it can only realize the voltage conversion, can not achieve power conversion.
The function of voltage transformer is to supply measuring instrument, relay voltage, so as to reflect the operation of an electrical system. The power transformer is to ensure the safety of personnel and two times, and the high voltage of electric power system is the same as that of voltage transformer. The difference is that the current transformer is 1 or 5. |