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Primary current clamp(CT1)
1. Primary current transformer (CT1)
3. Antenna
5. MEM buttons (5 pcs)
7. Secondary current transformer (CT2)
IV. Working Principle
In 380/220V power system, without the need to shut down the power, perform
sampling on primary and secondary loop current of current transformer by using
CT1 and CT2, conduct signal processing, amplification, filtering and A/D
conversion, and then input to the central processing unit of the tester. The CPU
analyzes and processes the A/D signals from both channels, then the tester
displays transformer ratio and ratio difference converted at secondary current of
5A, thus enabling safe and fast detection on variation and angle difference of
current transformer during operation.
The working principle is shown in the diagram below:
Host meter
Secondary current clamp(CT2)
2. Switch of primary current transformer
4. Display screen
6. Tester
3
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