The MI 3281 Winding Resistance Analyser (WR Analyser) is a portable test instrument intended for diagnosing of winding resistance of single and three phase transformers with manual or automatic tap changer test and demagnetization of tested transformer. Selectable test current in range from 10 mA to 20 A. The operation is straightforward and clear to enable the user to operate the instrument without the need for special training. For advanced users the AUTO SEQUENCES and visual tests are available.

Measuring functions

Available functions and features offered by the WR Analyser:

• Winding resistance measurement of single and three phase transformers;
• Winding resistance measurement of single and three phase transformers with manual or automatic tap changer test (automatic measurement of all windings);
• Demagnetization of single and three phase transformers.

Key features

• Selectable test current up to 20 A.
• Automatic winding resistance tests of transformers with On-Load or No-Load Tap Changer.
• Automatic discharge after finished measurement.
• Built-in help screens for referencing on site.
• EMERGENCY STOP switch in case of any emergency situation.
• A 4.3'' color LCD display with touch screen offers easy-to-read results and all associated parameters.
• The operation is straightforward and clear to enable the user to operate the instrument without the need for special training.
• Test results can be stored on the instrument.
• PC SW Metrel ES Manager for creation of test structures and uploading, downloading of test results, Auto Sequence® editor and report generation.
• Generation and printing of reports (optional)
• BT communication with PC, Android tablets and smart phones via built-in BT.
• Winding resistances conversion to a desired reference temperature.
• Degree of protection IP 65 (case closed), IP 40 (case open).

Ordering Information 

MI 3281 5M Standard set	MI 3281 10M Standard set
MI 3281 Instrument A 1715 5M H-side test cable A 1716 5M X-side test cable A 1757 Large Kelvin test clip with jaw opening 65 mm A 1813 Tap changer control cable 10 m USB cable Mains cable A 1552 Bag for accessories Metrel ES Manager BASIC license* Instruction manual Calibration certificate * The BASIC license can be any time upgraded to PRO license with ordering the PRO license key P 1101	MI 3281 Instrument A 1715 10M H-side test cable A 1716 10M X-side test cable A 1777 2 x Transportation reel for cables A 1757 Large Kelvin test clip with jaw opening 65 mm A 1814 2 x Fastening rope 1 m with carabiner hook A 1813 Tap changer control cable 10 m USB cable Mains cable A 1006 Bag for accessories Metrel ES Manager BASIC license* Instruction manual Calibration certificate * The BASIC license can be any time upgraded to PRO license with ordering the PRO license key P 1101