Megger manufactures resonating inductor. It is an accessory for use with the semi-automatic 12 kv extended-range capacitance and dissipation factor test set or the automated insulation power factor test set. Resonating inductor is used to expand the capacitance range of these test sets and cannot be used with the standard 12 kv capacitance and dissipation factor test set. The product is connected in parallel with the internal power supply of the test set. A manual tuning wheel on the resonating inductor varies the inductance to tune the parallel circuit for minimum load current. The salient features of resonating inductor are:
