To achieve high accuracy, Rogowski Coils should be connected to devices that have high input impedance. Figure 2-8 shows the impact of the device input resistance on the secondary output voltage for an example of Rogowski Coil that produces 150 mV at rated current. In reality, different Rogowski Coils may have different requirements on the input resistance of connected devices. In addition, capacitances of the burden and/or connected cable may affect the phase error; nevertheless the effect of such capacitances is relatively small.