Megger MTO106 Transformer Ohmmeter

Overview

The Megger MTO106 is a line-operated transformer ohmmeter specifically designed for safe and accurate field measurement of winding resistance in transmission and distribution transformers. It features dual channels and a wide measurement range suitable for power transformers, reactors, and instrument transformers of various sizes.

The instrument offers simplicity of operation with a single selector switch for test current and a single button to activate the test cycle. It is supplied with 10 meter test leads fitted with Kelvin clamps for secure one-time connection to units under test. The compact, lightweight design is housed in a rugged plastic case rated IP67, ensuring portability and protection in harsh field conditions.

Key Features

• Dual channels with maximum 6 A current output
• ±0.25% measurement accuracy
• 48 V test voltage for fast transformer saturation
• Automatic passive discharge circuitry for safety
• 10 m (33 ft) test leads with Kelvin clamps
• IP67 rated plastic case for harsh environment protection
• Multimeter-type operation for intuitive use

Applications

• Field testing of power transformer winding resistance
• Reactor and instrument transformer testing
• Pole-mounted transformer diagnostics

Included Accessories

• Test leads with Kelvin clamps (10 m / 33 ft)
• Rugged plastic carrying case