Megger MTO210 Transformer Ohmmeter, 10A 120-240V

A line-operated, field-portable resistance tester designed for accurately and reliably measuring the DC resistance of all types of magnetic windings such as rotator machine windings and transformers. The Megger MTO210 Transformer Ohmmeter can also perform low-current resistance measurements on connections, contacts, and control circuits. It is ideal for testing the windings and contact resistance of tap-changers with “make-before-break” contacts and voltage regulators; the Megger MTO210 will alert the user if pitted or misaligned contacts are detected.

Equipped with a dual set of potential inputs and a dual readout, the Megger MTO210 Transformer Ohmmeter can measure the resistance of the primary and secondary windings of a single- or three-phase transformer simultaneously. This improves efficiency when testing low voltage windings on large three-phase power transformers.

The Megger MTO210 Transformer Ohmmeter measures resistance between 1mΩ to 2000Ω to an accuracy of 0.25%. Data is displayed on the Megger MTO210’s high-contrast, large, alphanumeric display (readable in bright sunlight) and can be stored to the internal flash memory; measurements may be exported to a PC for analysis or printing via the RS232 serial port.

A user-selectable maximum current range protects small transformers; the Megger MTO210 Transformer Ohmmeter provides a maximum 10A DC test current. In addition to this, it includes an integrated demagnetisation circuit which demagnetises the transformer core once resistance testing is complete. The demagnetisation circuit can also be used as a stand-alone feature before SFRA testing or when the transformer is put back into service. Furthermore, the Megger MTO210 Transformer Ohmmeter features a built-in discharge circuit for safely discharging the transformer when the test is complete or if a lead accidentally disconnects or power is lost. The Megger MTO210 Transformer Ohmmeter delivers a very fast discharge time.

The Megger MTO210 Transformer Ohmmeter can be operated while in its transit case; the leads will also stay connected while the tester is in the case. Other useful features include:

• Beacon drive circuit for use with an optional beacon strobe light
• Remote trigger switch for testing transformers with tap-changers
• Ruggedised clamps with 100mm/ 4-inch jaws, removing the need for bushing adapters
• Detachable lid

The Megger MTO210 Transformer Ohmmeter is a durable, dependable, accurate transformer resistance tester.

Applications

The Megger MTO210 Transformer Ohmmeter can be used for the following:

• Verifying factory test readings
• Regular maintenance
• Identifying defects in transformers such as loose connections
• Checking the “make-before-break” operation of on-load tap-changers

Megger MTO210 Transformer Ohmmeter Key Features

• Line-operated, field-portable resistance tester
• Accurately and reliably measure the DC resistance of all types of magnetic windings such as rotator machine windings and transformers
• Perform low-current resistance measurements on connections, contacts, and control circuits
• Test the windings and contact resistance of tap-changers with “make-before-break” contacts and voltage regulators
• Alerts for pitted or misaligned contacts
• Dual set of potential inputs
• Dual readout
• Measure the resistance of the primary and secondary windings of a single- or three-phase transformer simultaneously
• Improves efficiency when testing low voltage windings of large three-phase power transformers
• Resistance measurement range: 1mΩ to 2000Ω
• Accuracy: 0.25%
• High-contrast, large, alphanumeric display that is readable in bright sunlight
• Store data to the internal flash memory
• RS-232 serial port
• Export data to a PC for analysis or printing
• User-selectable current range protects small transformers
• Maximum test current: 10A DC
• Integrated demagnetisation circuit
• Built-in discharge circuit: safely discharges the transformer when the test is complete, a lead accidentally disconnects, or power is lost
• Very fast discharge time
• Can be operated while in the transit case
• Leads stay connected while in the case
• Beacon drive circuit for use with an optional beacon strobe light
• Remote trigger switch for testing transformers with tap-changers
• Ruggedised clamps with 100mm/ 4-inch jaws, removing the need for bushing adapters
• Detachable lid
• Durable, dependable, accurate transformer resistance tester

What’s Included?

• Megger MTO210 Transformer Ohmmeter
• V1 60ft/18m Potential Lead Set
• V2 60ft/18m Potential Lead Set
• 60ft/18m Current Lead Set
• 30ft/9m Jumper Lead
• 15ft/4.5m Ground Lead
• RS-232 Cable
• Remote Hand Switch
• 8ft/2.5m Universal AC Power Cord Set, IEC (includes US standard, Schuko CEE 7/7, BS1363, AS/NZ S3112:2004)
• Quick Start Guide
• Backpack Lead Bag
• Ethernet Cable
• Instruction Manual
• Megger PowerDB LITE Software