AT MI3211 INSULATION TESTER
MI 3211 TeraOhmHP 10 kV
The MI 3211 TeraOhmHP 10 kV is a portable high-voltage insulation tester, powered by battery or mains supply, designed for insulation resistance testing and dielectric diagnostics on critical electrical assets.
It combines adjustable test voltage up to 10 kV DC, insulation measurement up to 35 TΩ, IP65 protection with the case closed, and CAT IV 600 V rating, making it suitable for transformers, cables, rotating machinery, and other demanding applications.
In addition, it integrates data storage, numerical and graphical results, and connectivity for PC-based analysis and reporting.
Measures insulation resistance in high-voltage ranges.
Performs PI, DAR, and DD diagnostic tests.
Performs step voltage testing and DC dielectric withstand testing up to 10 kV.
Measures voltage and frequency up to 600 V TRMS.
Measures capacitance up to 50.0 μF.
Stores results on an 8 GB SD card and allows download via MESM software.
Performs step voltage testing and DC dielectric withstand testing up to 10 kV.
Measures voltage and frequency up to 600 V TRMS.
Measures capacitance up to 50.0 μF.
Stores results on an 8 GB SD card and allows download via MESM software.
Measures voltage and frequency up to 600 V TRMS.
Measures capacitance up to 50.0 μF.
Stores results on an 8 GB SD card and allows download via MESM software.
Measures capacitance up to 50.0 μF.
Stores results on an 8 GB SD card and allows download via MESM software.
Ideal for:
Electrical maintenance teams in power generation, distribution, and industrial plants.
Insulation diagnostics on transformers, cables, and rotating machinery.
Users who need field testing with robustness, traceability, and reporting.
Not ideal for:
Low-voltage applications where a lower-range standard megohmmeter is sufficient.
Users requiring advanced automated tests not specified in the datasheet, beyond PI, DAR, DD, step voltage, and DC resistance testing.
Users requiring advanced automated tests not specified in the datasheet, beyond PI, DAR, DD, step voltage, and DC resistance testing.
Benefits
Greater confidence in insulation diagnostics — achieved through adjustable test voltage from 50 V to 10 kV and measurement up to 35 TΩ.
Lower risk of field errors — achieved through coded locking banana connectors and improved-grip HV clamps.
Greater operational continuity — achieved through PI, DAR, DD, and step voltage tests, which help detect deterioration before failure.
Reliable use in demanding industrial environments — achieved through CAT IV 600 V, IP65 enclosure with case closed, and high immunity to electromagnetic interference.
Higher measurement productivity — achieved through numerical and graphical results, programmable timers, and programmable automatic sequences.
Greater flexibility in the field and workshop — achieved through Li-ion battery or AC mains power supply.
Traceability and work documentation — achieved through 8 GB SD card, MESM software, and USB, RS-232, and Bluetooth ports.
Greater safety at the end of the test — achieved through automatic discharge of the test object and live voltage detection above 30 V.
Applications
Power transformers — problem: insulation degradation in windings and risk of failure or outage; how it solves it: applies insulation and diagnostic tests with adjustable voltage up to 10 kV DC; result: greater visibility into dielectric condition before an unplanned shutdown.
Power cables and long cables — problem: leakage, aging, or insulation weakness that is not detected with less demanding tests; how it solves it: combines high test voltage,> > 6 mA charging current, and capacitance measurement; result: more reliable verification during installation, maintenance, or troubleshooting.
Rotating machinery and generators — problem: progressive insulation deterioration in stators or equipment exposed to moisture, contamination, or electrical stress; how it solves it: incorporates PI, DAR, and DD for comparative evaluation of insulation condition; result: better-founded maintenance decisions and lower operational risk.
What does it include?
- MI 3211 TeraOhmHP 10 kV main unit
- HV test lead A 1794, 3 m, black, shielded
- HV test lead A 1795, 3 m, blue
- HV test lead A 1793, 3 m, red
- Power cable A 1728, 2 m
- USB cable A 1727, type A/B
A 1772 soft carrying bag, XXL size
BASIC license for Metrel ES Manager
1201 Metrel ES Manager software (installation)
Abbreviated instruction manual
Calibration certificate
Technical information - A 1772 soft carrying bag, XXL size
- BASIC license for Metrel ES Manager
1201 Metrel ES Manager software (installation)
Abbreviated instruction manual
Calibration certificate
Technical information - 1201 Metrel ES Manager software (installation)
- Abbreviated instruction manual
- Calibration certificate
Technical information
Download the MI 3211 TeraOhmHP 10 kV datasheet; it enables insulation testing and dielectric diagnostics on transformers, cables, and rotating machinery with up to 10 kV DC and measurement up to 35 TΩ.
Frequently Asked Questions
It measures insulation resistance from 0.01 MΩ to 35.0 TΩ. Accuracy depends on the range and the applied voltage; for example, at 10 kV it is specified as ±(5%) for 1 TΩ and ±(20%) for 20 TΩ.
Yes. The standard kit includes a calibration certificate. The public datasheet does not specify additional metrological scope or recommended periodicity.
It can operate from a 14.4 V / 4.4 Ah Li-ion battery or from 100 to 240 V AC, 45 to 65 Hz, 100 VA mains supply. It offers IP65 with the case closed and IP40 when open. The datasheet does not publish an operating temperature range.
Yes. The manufacturer positions it for power transformers, cables, rotating machinery, high-voltage generators, and insulation troubleshooting.
It weighs 6.2 kg without accessories, and the standard kit includes a carrying bag. It is not a pocket-size device, but it is a portable instrument intended for field and industrial environments.