Marine Generator / Alternator · Power Generation
The Marathon MaraGlobe 500 kVA is a marine‑rated diesel generator/alternator delivering 440 V at 60 Hz, designed for auxiliary power on medium‑size vessels.
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| Insulation resistance test | every 3-6 months, and before any extended lay-up |
|---|---|
| Bearing grease replenishment/replacement | per manufacturer's schedule - confirm exact figure against the manufacturer manual |
| AVR and protection function test | annually |
| Full winding inspection/overhaul | condition-based, typically around every 5 years |
| Insulation resistance | assess against the machine's own baseline trend rather than a single absolute figure - confirm minimum acceptable value against class/manufacturer's criteria |
|---|---|
| Bearing vibration | assess against trend/baseline rather than a fixed limit without manufacturer's vibration criteria for this frame size |
| Terminal connection torque | per manufacturer's torque spec - re-inspect on any sign of overheating discolouration |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Auxiliary generators fall under machinery/electrical survey requirements - class checks insulation resistance records, protective relay function tests and generator/prime mover load tests at periodic and annual survey.
Estimated lifetime: This entry's specifications carry a needs-verification flag from a general reference catalogue rather than a confirmed manufacturer's datasheet, so no lifetime hours figure is given - obtain confirmed technical data from Marathon Electric or the vessel's generator documentation before using this for maintenance planning
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