Multi-functional integrated testing system

A test system for testing an electrical cable having a first end and an opposing second end, and further having an electrically conductive element circumferentially surrounded by a first electrically insulative layer, the electrical cable further including an unshielded portion and a shielded portion including a first electrically conductive shield circumferentially surrounding the first electrically insulative layer, the first end electrically coupled to the second end to define a loop, the test system comprising:

• a voltage source configured to supply a first voltage signal;
• a current transformer having an annular core defining a bore, a primary winding, and a secondary winding, the primary winding being wound around a leg of the annular core, with the unshielded portion of the electrical cable being disposable through the bore to define the secondary winding;
• a first circuit having a first leg coupled to the voltage source via a first node and arranged electrically in series between the voltage source and an upstream end of the primary winding, the first leg having a first switch, the first circuit further including a second leg arranged in series between a downstream end of the primary winding and the voltage source via a second node, the second leg having a second switch, wherein the first circuit is configured to receive the first voltage signal when the first switch and the second switch are closed;
• an electrically conductive enclosure defining an interior space, arranged to operatively receive the shielded portion of the electrical cable within the interior space, the first electrically conductive shield being coupleable to the electrically conductive enclosure, the electrically conductive enclosure being couplable to an electrical ground;
• a second circuit coupled electrically in parallel with the first circuit, the second circuit coupled to the voltage source via the first node and arranged in series between the voltage source and the secondary winding, the second circuit including a third leg having a third switch, the second circuit further including a fourth leg arranged in series between the electrically conductive enclosure and the voltage source via the second node, the fourth leg including a fourth switch, wherein the second circuit is configured to receive the first voltage signal when the third switch and fourth switches are closed;
• a first current sensor configured to sense a first electrical current in the electrically conductive element at the unshielded portion of the electrical cable and to generate a first current sensor signal indicative of a first value of the first electrical current;
• a second current sensor configured to sense a second electrical current through the second node and to generate a second current sensor signal indicative of a second value of the second electrical current;
• a third current sensor configured to sense a third electrical current in the shielded portion of the electrical cable, and to generate a third current sensor signal indicative of a third value of the third electrical current, the third electrical current defined by a sum of the first electrical current and a fourth electrical current induced in the first electrically conductive shield;
• a testing unit comprising a first test module and a second test module, the testing unit communicatively coupled to the voltage source to receive a status signal indicative of a value of the first voltage signal therefrom, and further communicatively coupled to the first current sensor, the second current sensor, and the third current sensor to receive the first, second, and third current sensor signals respectively therefrom;
• wherein, when the third switch and the fourth switch are closed, the first test module is configured to determine the value of the first voltage signal, determine a magnitude of at least one of the first electrical current and the third electrical current, and to correlate the magnitude of the at least one of the first electrical current and the third electrical current with the value of the first voltage signal;
• and
• wherein, when the first switch and the second switch are closed, the second test module is configured to determine a difference between the first electrical current and the third electrical current and to correlate the magnitude of the at least one of the first electrical current and the third electrical current with the value of the first voltage signal.