These clamps are designed for measuring medium current of up to 600A AC. They have curved jaws which enable the user to hook onto cables and clamp small bars.
Y1, Y2 and Y3 clamps provide current output that can be used by a multimeter, recorder or other instrument with current calibres
There are two types of clamps:
the Y4 and Y7 models (clamp with BNC connector) provide DC voltage output, in proportion to the AC current measured (1 mV/A or 10 mV/A).