So I'm using a Fluke i200s current clamp in combination with an oscilloscope to measure the AC current. Normal current clamps have a current output, but this one has a voltage as output. Now my question is does this clamp has the same working principle as the others(like a transformer with one primary winding), and just measures the voltage instead of the current. Or does this clamp works differently, and how?
Electronic – Voltage output of AC current clamp
accurrentcurrent measurementoscilloscope
Best Answer
Figure 1. The Fluke I200S current clamp.
simulate this circuit – Schematic created using CircuitLab
Figure 2. The internal wiring.
It is a true current transformer but with a shunt resistor built in. The current will create a voltage drop across the resistor and this voltage is monitored by the oscilloscope.