Fuse Holders showing resistive heating,  due to a loose connection

415v electrical cubicle following failure of the incoming busbar connections. The resultant electric arc has melted the steel enclosure.

Resistive heating due to slack connection or corrosion

Thermography as a predictive maintenance tool is gaining increasing acceptance for use in ship's engine rooms

Thermography can be used for the preventative maintenance of electrical systems by detecting overheating connections before they fail or potentially result in fire

Thermography can also be used to survey lagging and insulation on steam pipes and exhaust sytems. Defective lagging is a potential source of fire in the event of a spray release of diesel fuel or hydraulic oil.Some 15 - 20 engine room fires are reported to DNV every year, out of a fleet of about 4.500 vessels. Approximately 60 % of these fires are caused by oil leakage hitting a hot surface.

Engines can be surveyed for abnormal heating of components and motors for overheating windings or bearings.

DNV ARTICLE ON THERMOGRAHIC SURVEYING

Fuse Holders

Fire Damaged Electric Cubicle

Overheating connection