Megger MTO106 Transformer Ohmmeter

Brand: Megger
Model: MTO106

easy-to-use, line-operated instrument specifically designed for safe and accurate field measurement of winding resistance in smaller transmission and distribution transformers.

Product Information



It has dual channels with a wide measurement range and can accurately provide information about the vast majority of power transformers, reactors and instrument transformers. The test current can be manually set in five different ranges to fit transformers of various sizes.


The instrument is exceedingly simple to use, which minimises the need to train service engineers. It has a single selector switch for testcurrent and a single button to activate the test cycle. The instrument is also supplied with test leads fitted with Kelvin clamps that allow for a single, one-time connection to the unit under test. The test leads are 10 m (33 ft) in length to allow for easy testing of pole mounted transformers.


Entry level transformer ohmmeter
2 channels with max 6 A current output
±0.25% measurement accuracy
48 V test voltage for fast saturation of transformers
Multimeter type operation, intuitive and fast
Safety through automatic, passive discharge circuitry
True portability – compact size and low weight