Current transformers (CTs) are sensors that are used for measuring alternating current. They are particularly useful for measuring whole building electricity consumption (or generation for that matter).
The split core type such as the CT in the picture above, is particularly suitable for DIY use it can be clipped straight on to either the live or neutral wire coming into the building without having to do any high voltage electrical work.
Suitable for the current measuring
Monitoring and protection of AC motor
Input Current: 0~30A AC
Output Mode: 0~1V
Build-in sampling resistance（RL): 62Ω
Turn Ratio: 1800:1
Resistance Grade: Grade B
Work Temperature: -25°C ~ ﹢70°C
Dielectric Strength(between shell and output): 1000V AC/1min 5mA