The structure and principle of clamp meter
The clamp meter is composed of a current transformer, a clamp wrench and an ammeter. Different ranges can be changed through the shifting of the switch.
Working principle: When the wrench is tightened, the iron core of the current transformer can be opened; the wire through which the measured current passes can pass through the opening of the iron core, and the iron core is closed when the wrench is released. The circuit wire under test that passes through the iron core becomes the primary coil of the current transformer, in which the current is induced in the secondary coil through the current, and the ammeter connected to the secondary coil is displayed.
