• Published: 28 Jun 2011
  • Incident ID: 3355

Harmonic Filter Failure

Cause & Consequence

  • Not Assigned
Incident Consequence
Not Assigned

Incident Location

Specialist vessel eg diving, construction, survey

Incident Activity

Sea transport

Incident Info Source


Specific Incident Equipment

A capactiors in a harmonic filter

Lessons Identified

See Recommendations

Incident Recommendations

Operators of vessels with electronic propulsion which have large capacitors in harmonic filters, should urgently:

  • Inspect the capacitors and check for any physical distortion, unusual smells ( indicating dielectric fluid leakage) and signs of external overheating.
  • Ensure that the cooling and ventilation systems are functioning correctly.
  • Caliberate and function test any fault detection or condition monitoring system fitted.
  • Ensure that if there is a history of capacitors in the equipment needing to be replaced, the underlying causes are understood.
  • Carry out a thorough check fir the cleanliness of all exposed conductors as well as for external signs of chaffing damage on high voltage cables.

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