Partial discharge in high-voltage distribution equipmentcan be used as an early warning indicator of insulation degradation and eventual failure, and without detection, can evolve into complete dielectric breakdown, arc faults, and potentially explosive equipment failure.
If partial discharge goes unmonitored, the consequences can compound over time, with the progressive erosion of insulation that will eventually lead to full dielectric breakdown. If uncontrolled, this can result in cable termination explosions, transformer winding faults, and bushing flashover. And these failures are often both sudden and violent.
Even in the best-case scenario, the accelerated aging of the insulation will cut years from a transformer’s service life, and cable systems will require premature replacement, with assets losing reliability margins long before visible failure appears.
The effect of this can be emergency replacement costs running into the millions of dollars and unplanned downtime for utilities and customers… plus regulatory fines. Indirect costs include loss of customer trust, brand damage, potential decline in company valuation, and increased audits or investigations that may disrupt ongoing operations.
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