Voltage output of AC current clamp
Figure 1. The Fluke I200S current clamp.







simulate this circuit &ndash; Schematic created using CircuitLab

Figure 2. The internal wiring.


  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.


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.