Method of monitoring partial discharges in a high voltage electric machine, and connection cable therefore
AssigneeVibrosystm Inc.
InventorsMarius Cloutier, Mathieu Cloutier
Life of this patent
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Abstract
Partial discharges in a high voltage electric machine can be monitored by a partial discharge monitor connected to the high voltage electric machine successively via a capacitive coupler and a connection cable. The connection cable can have a conductive element designed to self-destruct in the presence of electric current amplitude significantly exceeding expected current amplitudes from said partial discharges, and having diameter designed to avoid creation of additional partial discharges within the cable itself. The connection cable can be light enough to avoid adding excessive weight to the stator windings.
Claims14
A connection cable for monitoring partial discharges in a high voltage electric machine, the connection cable having a semi-conductor element surrounded by a jacket, the jacket providing an insulation of above 15 kV, the semi-conductor element configured to limit a current capacity and having a cross-section area designed to self-destruct in the presence of a critical current amplitude, the critical current amplitude being below the thousands of amperes range, above 100 milli-Amperes, and significantly exceeding expected current amplitudes from the partial discharges of the high voltage electric machine, the semi-conductor element having a diameter of at least 6 mm and sufficient to avoid significant partial discharges within the cable itself.
Dependencies are inferred from the claim text.