Current transformer

Current transformer field tester according to national standards for measuring current transformer ratio error and the angular difference, but also measuring current

1% to 200% of any percentage ratio between the difference and the angle difference; directly measuring current transformer ratio and polarity; may actual field

measurements of the current transformer

Secondary load and so on. Instrument uses a high-precision, automatic linear regulated DC and AC power; high speed, high reliability digital processing module; high

measurement accuracy, high stability of pre-measuring instruments to measure the circuit to ensure the accuracy and high stability. In addition, the instrument

Uses the latest development out of the 320x240 large LCD full Chinese interface platform technology, with user-friendly interface, prompts wiring and operation, and

has saved any measurement parameters and measurement results printing function.
Current transformer principle is based on the principle of electromagnetic induction. Current transformers are closed by the core and windings. It is a small number of

turns, the current string in the line to be measured, so it is often the entire current flows through the circuit, the secondary winding turns

More, connected in series in the measuring instrument and the protection circuit, a current transformer in operation, it is always the secondary circuit is closed, the

measurement instrument and the series impedance of the coil protection circuit is small, close to the operating state of the current transformer short circuit.
Principle
In power generation, transformation, transmission, distribution and electricity lines in the current size of the gap, from a few to tens of thousands Ann Ann has. For

ease of measurement, protection and control needs to be converted to more uniform current, the voltage on the other line higher than the general risk, such as direct

measurement is

Insurance. Current transformer to play the role of current transformation and electrical isolation.