DC current transformer variation and short-term stability

- Jul 12, 2019-

In the process of using DC current transformer, it mainly refers to the mutual inductance used for the magnitude conversion of DC current. The utility model utilizes the nonlinearity and asymmetry of the iron core in the core coil to be magnetized by the direct current and the alternating current, and converts the direct current of the direct current passing through the coil into a direct current with a small direct current by a rectification circuit through a rectifying circuit. It is mainly used to measure DC high current and is also used as current feedback, control and protection components in rectifier systems. Compared with the shunt, it has low power loss and isolation.

DC current transformer variation

The DC current transformer is preheated, rises to the rated current value for 10 minutes, and then quickly drops to any point within the measurement range. The error between the rising and falling values should not be greater than the error limit corresponding to its accuracy level. 1/3. The error during the test shall not exceed the error limit corresponding to its accuracy level.

Short-term stability of DC current transformer

Preheating the DC current transformer, within the environmental conditions specified by the technical conditions and ensuring accuracy, within 30 minutes of the rated working current, the error change should be greater than 1/ of the error limit corresponding to its accuracy level. 3. The error during the test shall not exceed the error limit corresponding to its accuracy level.

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