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Semi automatic oil test set


  • OTS60SX/2
  • Overview  
  • Application  
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  • Robust oil chamber lid, fully opening for easy access
  • Robust and protective control panel lid
  • Lightweight portable unit for field use
  • Simple, semi-automatic operation
  • Suitable for all oil breakdown testing to 60 kV
  • Automatic 1 minute timer for easy withstand testing
  • 1ms HV switch off time eliminates damage to the oil samples

The OTS60SX is a lightweight, semi-automatic, oil dielectric strength test set. The instrument is suitable for field use and is powered from a range of line voltages. The maximum 60 kV output allows tests to be performed on oil from a wide variety of electrical installations including transformers, circuit breakers and other equipment.


Oil has been used as an insulating medium in transformers for over one hundred years. From the earliest days of transformer design, oil has been recognised as being an efficient coolant with a high flash point and high electric strength. Oil can be used in electrical equipment for a long time if adequately maintained.

Many factors can lead to a weakening of the insulation properties of oil. Oil degradation takes place due to oxidation, acids, sludge, gas and water absorption. These processes change the electrical properties of the oil which can be seen from a dielectric strength test.


The range of oil test sets available from Megger offers solutions for all oil testing applications. The popular portable OTS60PB, OTS80PB and laboratory OTSAF/3 series are fully automatic oil testers that incorporate a built in printer and enable the user to program custom tests.