Tester for a frequency-dependent ground fault interrupt wiring device

A tester for a frequency-dependent ground fault interrupt wiring device, comprising:

• a tester circuit, comprising:
• a switch disposed between a first terminal and a second terminal, wherein a leakage current flows through a leakage path between the first terminal and the second terminal when a voltage is applied across the first terminal and the second terminal, a magnitude of the leakage current being determined, at least in part, by a conductivity of the switch;
• a waveform generator configured to generate a waveform generator output signal;
• and
• a comparator configured to generate a comparator output signal based on a comparison of the waveform generator output signal to a current sense signal, the current sense signal being representative of the leakage current, wherein the conductivity of the switch is adjusted according to the comparator output signal such that the leakage current follows the waveform generator output signal.