Description

Megger MIT1025 10kV Insulation Resistance Tester

The Megger MIT1025 10kV Insulation Resistance Tester is a high-performance, precision instrument designed for accurate testing of insulation in high-voltage electrical systems. Built for professionals in power utilities, industrial plants, and maintenance engineers, this tester ensures reliable insulation diagnostics to safeguard equipment and personnel.

Equipped with a test voltage range up to 10 kV, the MIT1025 allows users to measure insulation resistance on transformers, cables, motors, switchgear, and other high-voltage apparatus with confidence. Its advanced microprocessor-controlled design delivers fast, stable readings, minimizing errors caused by environmental factors or operator handling.

Key features include a large, easy-to-read display, intuitive user interface, and multiple test functions such as insulation resistance, PI (Polarization Index), and DAR (Dielectric Absorption Ratio) measurements. Built for both field and laboratory use, the MIT1025 offers robust construction, excellent portability, and long battery life, making it an indispensable tool for ensuring electrical system reliability and compliance with international standards.

With the Megger MIT1025, engineers can perform high-voltage insulation testing safely, efficiently, and with confidence, protecting critical equipment and reducing the risk of electrical failures.

Specifications

Test Voltage & Measurement Range

• DC Test Voltage: 500 V, 1 kV, 2.5 kV, 5 kV, and 10 kV (user-defined also available)

• Resistance Range (digital): 10 kΩ to 20 TΩ

• Resistance Range (analogue): 100 kΩ to 10 TΩ

Accuracy & Performance

• Resistance Accuracy: ±5 % up to 2 TΩ, ±20 % up to 20 TΩ

• Output Voltage Accuracy: +4 % / -0 % ± 10 V at 1 GΩ load

• Voltmeter Range: 30 V–660 V AC/DC

• Voltmeter Accuracy: ±3 % ± 3 V

• Measurement Current Range: 0.01 nA – 6 mA

• Short-Circuit Current: 3 mA (nominal)

• Resistance Limit Alarm: 100 kΩ – 1 GΩ

Test Modes & Functions

• Test Modes: IR, IR(t), DAR, PI, DD, SV, Ramp

• Capacitance Measurement (above 500 V): 10 nF – 25 µF

• Capacitance Charging Time: <5 s/µF to 10 kV

• Fast Capacitance Discharge after test

Memory & Interface

• Data Logging Capacity: ~5.5 hours (5-second interval)

• Interface: USB Type-B (for data transfer & real-time output)

Power & Operation

• Power: AC Adapter (85–264 V, 50/60 Hz) + Rechargeable Li-ion Battery

• Battery Charging Time: ~2.5 hours; continuous test operation ≥4.5 hours (depending on load)

Environment & Safety

• Operating Temperature: ‑20 °C to +50 °C

• Storage Temperature: ‑25 °C to +65 °C

• Humidity: Up to 90 % RH non-condensing

• Protection Class: IP65 (lid closed); IP40 (lid open)

• Operating Altitude: Up to 3000 m

• Safety Rating: CAT IV 600 V per IEC 61010‑1

Physical & Display

• Large backlit LCD for clear visibility

• Portable design suitable for field and laboratory use