Patent ID: 7847439

Claim:
A dry-type high-voltage load system apparatus having a high-voltage load system circuit for testing a high voltage generator, comprising: a central breaker arranged for connection to the high voltage generator; a transformer having an input terminal connected to the central breaker and an output terminal; a low-voltage bank comprised of: a first plurality of switches; a plurality of first lower-capacity configuration banks each being a low-voltage resistor circuit comprised of a plurality of low-voltage three-phase resistor circuits, the first lower-capacity configuration banks each respectively connected to a corresponding one of the first plurality of switches to form first switched bank series circuits, the first switched bank series circuits being connected in parallel to the output terminal of the transformer; and a high-voltage bank comprised of: a second plurality of switches; a plurality of second lower-capacity configuration banks each being a high-voltage resistor circuit comprised of a plurality of high-voltage three-phase resistor circuits, the second lower-capacity configuration banks each respectively connected to a corresponding one of the second plurality of switches to form second switched bank series circuits, the second switched bank series circuits being connected in parallel to the central breaker: said low-voltage three-phase resistor circuits and said high-voltage three-phase resistor circuits each being comprised of resistor arrays configured for three phases, each of said resistor arrays being comprised of resistor elements connected in a series resistor connections, and the resistor arrays being arranged in a form of at least one of: a Y-connection of three of the series resistor connections arranged to form an isolated and independent neutral point unconnected neutral points of other Y-connections, and the Y-connection having terminals connected to each of in-phase branch distribution lines of a power cable from the circuit breaker; or a Δ-connection of three of the series resistor connections arranged with terminals of the Δ-connection connected to each of in-phase branch distribution lines of a power cable from the circuit breaker; and said resistor elements each comprising: a cylindrical outer tube made of metal; electrode rods inserted respectively from both ends of said outer tube; a resistive heat-generating wire wound spirally and extending between inner ends of the electrode rods inside said outer tube; an insulating material filling up a space between said resistive heat-generating wire and an internal surface of said outer tube; and high-voltage proof insulating sleeves extractably encasing and anchored in portions of the metal tube adjacent to the both ends of said outer tube, said high-voltage proof insulating sleeves being configured to be supported by various supporters.