Partial discharge analysis coupling device that generates a pulse signal and a reference signal

A partial discharge analysis (PDA) coupling device comprising:

• a connector electrically connecting a first coupling capacitor and a second coupling capacitor;
• a first conductive rod configured to electrically connect the first coupling capacitor to a high voltage output of a generator;
• a second conductive rod configured to electrically connect the second coupling capacitor to ground;
• a current transformer substantially surrounding a portion of the second conductive rod, the current transformer configured to generate a pulse signal;
• a reference signal generator adjacent to the current transformer configured to generate a reference signal in phase with the pulse signal and electrically coupled to the second conductive rod;
• and
• a casing comprising a cavity including electrical potting material, wherein the cavity includes at least the connector, the first and second coupling capacitors, the first and second conductive rods, and the current transformer.