Polarity test instrument for current transformer

The utility model discloses a polarity detection device of the electric system, especially discloses a polarity test instrument for the current transformer. The polarity test instrument of the current transformer comprises a main body of the test instrument and the upper cover of the test instrument which are mutually connected. The instrument is characterized in that a primary circuit control module of the apparatus, a electricity quantity display module for the battery, a CT secondary current display module, and an external lead wire module all connected with an accumulator are mounted inside the body of the test instrument. The polarity test instrument for the current transformer is simple for operation, convenient and rapid, capable of completing the operation by a single person, highly safe. Moreover, the electric power module is embedded inside the apparatus, and the voltage is adjustable. A positive range and a negative range are set for the current meter, and the pointer can deflect to two directions. Bi-directional display can be performed, and the requirements of different primary circuit for the apparatus can be satisfied.