Megger MIT1525/2 Advanced 15kV HV Insulation Resistance Tester

Megger MIT1525/2 Advanced 15kV HV Insulation Resistance Tester

The Megger MIT1525/2 Advanced 15kV HV Insulation Resistance Tester is the most powerful model in Megger’s Advanced range, delivering up to 15kV of test voltage when assessing insulation integrity in large motors, generators, transformers, switchgear, and high-voltage cables.

The MIT1525/2 is able to measure insulation resistance up to 30TΩ with exceptional accuracy and stability, even in electrically noisy conditions. It supports a full suite of diagnostic tests such as Polarisation Index (PI), Dielectric Absorption Ratio (DAR), Dielectric Discharge (DD), Stepped Voltage (SV), Ramp Test, and PDC (Polarisation Depolarisation Current) analysis when used with Megger’s PowerDB software. These advanced features provide deep insights into insulation condition, helping users detect early signs of deterioration and decide how to handle maintenance. The MIT1525/2 also includes a guard terminal, which eliminates surface leakage currents and improves measurement precision in contaminated or humid environments.

The MIT1525/2 is designed with safety and durability in mind, boasting a CAT IV 1000V safety rating and certified for operation at altitudes up to 3000 metres. It comes in a rugged dual-case construction that includes a tough outer shell and a fire-retardant inner case, while an IP65 rating (with lid closed) protects it against dust and moisture ingress. The lids are removable and have Velcro-secured pouches to keep accessories organised and accessible, as well as improve access to terminals during testing. Another safety feature is the five-tier voltage warning system that alerts users to hazardous conditions and an automatic capacitive discharge that ensures safe handling post-test.

The MIT1525/2 comes complete with two sets of 3-metre test leads (one with medium clips and one with large clips rated for 15 kV), a power lead, a screened USB cable, a quick-start label, and a calibration certificate.

Comparing the Megger Essential, Advanced & Expert Ranges

part number: 1016-099

Key Features

• Selectable test voltages: 1000V, 2500V, 5000V, 10,000V, 15,000V
• Resistance measurement up to 30TΩ
• Polarisation Index (PI)
• PI Predictor (Plp) – predicts PI result early in the test
• Dielectric Absorption Ratio (DAR)
• Dielectric Discharge (DD)
• Stepped Voltage (SV)
• Ramp Test
• ±5% accuracy up to: 3TΩ @ 15kV; 2TΩ @ 10kV; 1TΩ @ 5kV
• CAT IV 1000 V rated up to 3000m altitude
• Dual-case design: rugged outer shell + fire-retardant inner case
• IP65 rating (lid closed), IP40 (lid open)
• Voltage warning system with 5 safety levels
• RE>Act mode
• Operates from AC mains or rapid-charge Li-ion battery
• Battery life: ~4.5 hours continuous testing at 15 kV
• Quick charge: 30 min for 1-hour operation
• Custom colour display with wide viewing angle
• Real-time graphing and data logging
• USB and Bluetooth LE for data transfer and remote control
• PDC (Polarisation Depolarisation Current) test
• Time/date stamped results
• Compatible with CertSuite Asset Lite (free) and CertSuite Asset (subscription)
• Supports PowerDB Lite and PowerDB Advanced/Pro
• Operating temperature: -20°C to +50°C
• Storage temperature: -25°C to +65°C
• Humidity: 90% RH non-condensing at 40°C