1With high quality alloy core, it has stable performance, high precision and strong anti-interference ability, and is suitable for complex interference environment. 2The clamp structure does not need to cut off the power supply and disconnect the line under test. It is especially suitable for on-line field testing. 3Non-contact measurement, easy to operate, fast, safe and reliable. 4It is suitable for high precision detection of AC current, high harmonic current, phase, electric energy, power, power factor, etc. 5With the new CT technology, it can connect phase detection analyzer, industrial control device, data recorder, oscilloscope, harmonic analyzer, power quality analyzer, high precision digital multimeter and so on. 6The transformer can output current and voltage signals. It is compact and easy to carry. 7It is widely used in electric power, communication, meteorology, railway, oil field, construction, metrology, scientific research and teaching units, industrial and mining enterprises and other fields.