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Megger MTO300 & MTO330 Automated Six-Winding Transformer Ohmmeters

  • mto330 sm
mto330 sm
Downloads & Videos MTO300_330_Datasheet

Brand: Megger

Model: MTO330 and MTO330

Megger MTO300 and MTO330 delivers full eight-terminal/six-winding resistance measurement capability. It is designed to save time for the user by testing all normal 6 windings without having to disconnect and reconnect leads during testing.


The MTO3xx series also shares the Megger TTR3xx series lead set. Users who test both turns ratio and winding resistance can save time and money since only one lead set is needed to connect to the transformer.


The base model - MTO300, is designed to be remote controlled via PowerDB software on an external PC or a Megger transformer test product with on-board computer.


The MTO330 offers the same functionality as the MTO300. However, it is equipped with an onboard computer featuring full QWERTY keyboard and navigational pushbuttons as displayed on an 8.4 inch full-color VGA transflective screen viewable in bright sunlight.



  • Automated 8-terminal/6-winding measurement capability
  • Simultaneous winding magnetization
  • Tests operation of on-load tap-changers
  • Built-in auto-demagnetization feature
  • Automatic discharge
  • Power DB software (MTO330)