Megger MTO210 transformer ohmmeter

The Megger MTO210 measures winding resistance quickly and safely.  Incorporating the latest test technology and field experience, the MT0210 transformer ohmmeter measures the DC resistance of all types of magnetic winding quickly, safely and accurately. The unit is also suitable for checking the operation of on-load tap changers, one of the most common causes of transformer problems.

Time-saving features include dual-channel operation, which allows the resistances of transformer primary and secondary windings to be measured simultaneously, and bidirectional current output capabilities that allow users to take advantage of any existing magnetisation in the winding core to aid rapid current stabilisation.

When used to check the contact resistance of make-before-break tap changes and voltage regulators, the MTO210 provides fast indication of pitted or misaligned contacts.

For added safety, circuitry is included that automatically discharges the winding or windings under test when the test is completed, if a lead is accidentally disconnected or in the event of a power failure.

The MTO210 offers facilities for demagnetising winding cores before or after resistance testing is carried out and can also be used as a standalone core demagnetiser. Remaining magnetisation will affect frequency response measurements on the transformer and may also cause high in-rush currents when the unit is back in service.

Test results are show on large LCDs and can be stored in the instrument’s memory for printing or downloading at a later time. The MTO210 is fully compatible with Megger’s PowerDB Lite software, which provides uniform test result analysis and reporting features for all types of power equipment tests.

Weighing less that 13.5 kg and built into a rugged case with a hinged lid and carrying handle, the MTO210 is equally suitable for use on site and in the workshop.