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Partial discharge from localised defects in insulation is the primary cause of system failure in electrical distribution equipment

(12/08/2009)

Partial discharge refers to the electrical discharge or spark which can occur between two conducting electrodes along a section of insulation, typically in ageing cables or defective joints and terminations. Presenting in solid insulation, within gas bubbles in liquid insulation or around electrodes in gas, the accumulation of energy from partial discharge gradually weakens the insulation, leading eventually to a system malfunction. This may take... [more]

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