top of page

MI-20KVe High-Voltage Insulation Tester

The MI‑20KVe is a high-voltage, portable insulation resistance tester designed for professional applications requiring test voltages up to 20 kV. This advanced instrument enables accurate and safe measurement of insulation resistances up to 4,000,000 MΩ (4 TΩ) across four selectable test voltages: 5 kV, 10 kV, 15 kV, and 20 kV.

Equipped with a large analog scale, the MI‑20KVe provides real-time visual feedback that is particularly effective for diagnosing insulation issues over time — making it ideal for field testing of transmission lines and medium-voltage distribution systems, both overhead and underground.

With a rugged, IP65-rated enclosure, rechargeable battery, and complete accessory kit, the MI‑20KVe is designed to perform reliably even in harsh environments.

Key Features

  • Insulation testing up to 4 TΩ

  • Four high-voltage test settings: 5 kV, 10 kV, 15 kV, 20 kV

  • Analog display with large mirror scale for high visibility and accuracy

  • GUARD terminal to reduce surface leakage errors

  • Short-circuit current limit: 500 µA for safety

  • Fully enclosed plastic cabinet with high dielectric strength

  • No exposed metal parts for maximum operator safety

  • Visual high-voltage indicator and automatic discharge function

  • IP65-rated for water and dust resistance (with lid closed)

  • Supplied with high-voltage leads and carrying case

Technical Specifications

Test Voltages

  • 5 kV, 10 kV, 15 kV, 20 kV

Maximum Resistance Readings

  • 1 TΩ @ 5 kV

  • 2 TΩ @ 10 kV

  • 3 TΩ @ 15 kV

  • 4 TΩ @ 20 kV

Short Circuit Current

  • 500 µA

Test Voltage Accuracy

  • ±2% of nominal voltage (on R ≥ 10 GΩ)

Current Limiting Resistance

  • 10 MΩ @ 5 kV

  • 20 MΩ @ 10 kV

  • 30 MΩ @ 15 kV

  • 40 MΩ @ 20 kV

Insulation Tester Accuracy

  • Class 2 (±2% of full-scale deflection)

Analog Indicator

  • Scale length: Up to 98 mm

  • Taut band with mirror scale (anti-parallax)

Environmental Protection

  • IP65 (lid closed)

Compliance and Safety

  • IEC 61010-1 (Safety)

  • IEC 61326-1 (EMC)

  • IEC 61000-4-3 (Electromagnetic Immunity)

  • IEC 61000-4-2 (Electrostatic Immunity)

Power Supply

  • Internal 12 V / 7 Ah sealed lead-acid rechargeable battery

  • Charger input: 100–240 V AC

Temperature & Humidity

  • Operating: -10 °C to 50 °C (14 °F to 122 °F)

  • Storage: -25 °C to 70 °C (-13 °F to 158 °F)

  • Humidity: Up to 95% RH (non-condensing)

Physical

  • Weight: Approx. 21.6 lb (9.8 kg)

  • Dimensions: 14.88" x 12.13" x 6.89" (378 x 308 x 175 mm)

Application

  • Medium-voltage and high-voltage transmission lines

  • Underground and aerial distribution systems

  • Cable failure detection

  • Substation and utility maintenance

  • Industrial equipment insulation testing

Included Accessories

  • 2 High-voltage measuring test leads

  • 1 GUARD test lead

  • 1 AC adapter / battery charger

  • 1 Carrying bag

  • 1 Operating instructions manual

bottom of page