Push your insulation testing further — up to 10 kV with confidence.

The Metrel MI 3211 TeraOhmHP 10 kV is designed for professionals who need reliable, high-voltage insulation testing in power generation, transmission, distribution, and heavy industry. Whether you’re verifying insulation on motors, generators, transformers, or high-voltage cables, the MI 3211 delivers precision, durability, and safety in one instrument.

What does it do?

The MI 3211 measures insulation resistance up to 30 TΩ at test voltages from 250 V to 10 kV. It provides accurate diagnostics of insulation integrity, helping prevent failures, reduce downtime, and ensure compliance with safety standards.

Who is it for?

• Electrical contractors and utility engineers

• Industrial maintenance teams

• Power plant technicians

• Anyone working with medium- and high-voltage equipment requiring 10 kV insulation testing

Why is it better?

Compared to older models (like the MI 3210), the MI 3211 offers:

• Higher test voltage range (up to 10 kV) for greater application coverage

• CAT IV / 600 V safety rating for robust protection

• Large LCD graphic display with real-time test progress and results

• Advanced features: polarization index (PI), dielectric absorption ratio (DAR), step voltage, ramp tests

• Rechargeable Li-ion battery for extended field use

Key Technical Specifications

• Test voltage range: 250 V – 10 kV, adjustable in 50 V steps

• Insulation resistance: up to 30 TΩ

• Short-circuit current: 5 mA

• Measurement functions: RISO, DAR, PI, step voltage, ramp test, capacitance, leakage current

• Safety: CAT IV 600 V / CAT III 1000 V

• Power supply: Li-ion rechargeable battery, mains charger

• Display: large LCD with backlight and graphical support

• Memory & Communication: 8 GB internal memory, USB & Bluetooth® for data transfer

• Weight: approx. 4.5 kg

Included Accessories

• High-voltage test leads (red/black, shielded)

• Crocodile clips

• Guard terminal lead

• Mains adapter + charging cable

• Transport bag

• User manual and calibration certificate