MTO210 Transformer ohmmeter/ Transformer winding resistance ohmmeters

Description

MTO210 Transformer ohmmeter/ Transformer winding resistance ohmmeters

MTO210 transformer ohmmeter is a line-operated, field-portable instrument designed specifically to measure the dc resistance of all types of magnetic windings safely and accurately. It can test transformers and rotating machine windings and perform low-current resistance measurements on connections, contacts and control circuits. The Transformer Ohmmeter is extremely useful when testing the windings and contact resistance of tap-changers with “make-before-break” contacts and voltage regulators. Transformer  winding resistance ohmmeter action will check for pitted or misaligned contacts as the instrument will give an indication if either condition occurs.

MTO210 Features

• Direct 2-channel digital reading (1 µΩ to 2000 Ω)
• DC test current up to 10 A maximum
• 25% measurement accuracy
• Integrated demagnetization feature
• Tests operation of on-load tap-changers
• Very fast auto safety discharge circuit

Transformer  winding resistance ohmmeter MTO210 Applications

• To verify factory test readings.
• As part of a regular maintenance program.
• To help locate the presence of defects in transformers, such as loose connections.
• To check the “make-before-break” operation of on-load tap-changers.

Transformer  winding resistance ohmmeter MTO210 Features and benefits

• Direct 2-channel digital reading allows for testing two windings at a time.
• Very fast discharge time.
• High-contrast, large alphanumeric displays can be seen in bright sunlight.
• User-selectable maximum current range ensures protection of small transformers.
• Beacon drive circuit is provided for use with optional beacon strobe light.
• Built-in demagnetization circuitry allows the operator to de-magnetize the transformer core upon completion of resistance testing, or as a stand-alone feature before SFRA testing or when the transformer is put back in service.
• The MTO210 in India allows for test of transformers with on-load tap-changers and provides a “break-before-make” indicator, in the event of any discontinuity.
• For those users who choose to create an external interlock safety perimeter, a safety interlock circuit is
• Remote trigger switch is also provided for testing transformers with tap-changers.
• Internal flash memory allows for mass storage of dataset records, for later recall, printing, and analysis.
• Ruggedized clamps, with 4 inch (100 mm) jaws, are provided eliminating the need for bushing adapters.
• Kelvin clamps/cables (optional) for easy connection to the transformer
• Compatible with PowerDB software package.
• Built-in discharge circuit safely discharges the specimen when test is completed, if lead accidentally disconnects,  or if power is lost.
• Output RS232 serial port is provided for optional printing of results and/or data analysis on a PC.
• Detachable lid for ease of use.
• Unit can be operated while in transit case.
• Leads can stay connected while in transit case