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Function and effect:
Intrument transformer is a special type of transformers, including current transformer and voltage transformer. It is a very important core part of entire power supply system.
Instrument transformer transfer voltage from high level to low level, and transfer large current to small current. For the purpose of measurement and protection.
Main categories:
Transformers are classified according to the main categories, including current transformers and voltage transformers.

With the development of science and technology, its respective subdivisions are becoming more and more diverse, mainly the following: current transformer, according to use: measuring current transformer, protection current transformer, voltage transformer, according to use: measuring voltage transformer or voltage transformer measurement winding, protection voltage transformer or voltage transformer protection winding.