Megger MIT525 5 kV Insulation Resistance Tester
- MIT525/2 from the ‘Advanced Range‘
The Megger MIT525 is a versatile Advanced range 5 kV insulation resistance tester designed for professionals who require more than basic “go/no-go” testing. It offers high accuracy, enhanced noise immunity, onboard data storage, and connectivity options for streamlined reporting.
With measurement capability up to 30 TΩ, selectable test currents, and additional diagnostic tools such as PDC testing, Ramp tests, and Dielectric Discharge, the MIT525 is an excellent choice for maintenance teams, electrical contractors, and utility engineers needing deeper analysis and flexible data handling.
Why choose the Megger MIT525?
The MIT525 bridges the gap between simplicity and advanced diagnostics. Unlike Essential models, it includes memory storage, USB/Bluetooth® transfer, and enhanced noise rejection (up to 6 mA), making it ideal for environments up to 230 kV.
If your work involves trend analysis, detailed reporting, and high-capacitance assets, the MIT525 provides the performance and tools to do the job efficiently.
Key features of the Megger MIT525:
- RE>Act mode – detects reabsorption current to improve accuracy and safety.
- Patented PI predictor (PIp) – speeds up PI testing by predicting results mid-test.
- Measures up to 30 TΩ at 5 kV.
- ±5% accuracy to 1 TΩ at 5000 V.
- PDC (Polarisation/Depolarisation Current) test capability for advanced insulation diagnostics.
- Ramp and Dielectric Discharge testing modes.
- Up to 6 mA of noise rejection for stable readings in higher-voltage environments (up to 230 kV).
- Selectable test currents (1 mA, 3 mA, 6 mA).
- Onboard memory with time/date stamps and USB/Bluetooth® transfer.
- Safety rated CAT IV 1000 V to 3000 m altitude.
- Rugged dual-case design and large backlit colour display.
Specifications:
| Feature | Details |
| Max Test Voltage | 5 kV |
| Insulation Resistance Range | up to 30 TΩ |
| Accuracy | ±5% to 1 TΩ at 5000 V |
| Noise Rejection | up to 6 mA |
| Test Currents | Selectable – 1 mA, 3 mA, 6 mA (6 mA on mains) |
| Safety Rating | CAT IV 1000 V, 3000 m altitude |
| Connectivity | USB and Bluetooth® LE |
| Memory | Time/date stamped storage for test results |
| Display | Large, colour, backlit |
| Design | Dual case for impact, dust, and moisture resistance |
↑ The Advanced Range models (MIT525/2, MIT1025/2, MIT1525/2) are an ideal choice if, in addition to the above, you need to record test results, transfer results to software/mobile app (via USB or Bluetooth LE), and want the benefits of more diagnostic insulation testing. The Advanced range also adds additional noise immunity for power distribution environments, and the ability to either increase or decrease the output current.
Built for your environment
The MIT525 is engineered for challenging field conditions, from noisy substation yards to industrial plants. The dual-case design offers drop and impact protection, while dust and moisture ingress protection ensures reliable operation in harsh conditions.
Its enhanced noise immunity makes it suitable for higher-voltage environments, and the large colour display ensures test data is easy to read in any light.
Applications:
- Commissioning and maintenance of transformers, switchgear, motors, and generators.
- High-voltage cable testing and fault location.
- Industrial and utility maintenance requiring advanced diagnostics.
- Trend analysis and condition monitoring via stored test data.
What comes with the Megger MIT525?
- MIT525 insulation resistance tester
- Li-ion rechargeable battery (pre-installed)
- Mains power lead
- Test leads rated for 5 kV
- User guide and quick-start lid reference
- Carry-all holdall with removable lid pouch
❓ Frequently Asked Questions (FAQ)
Q1: How is the MIT525 different from the MIT515?
A. The MIT525 offers advanced diagnostics (PDC, Ramp, DD tests), onboard memory, data transfer, and enhanced noise immunity compared to the Essential range MIT515.
Q2: Can I transfer results wirelessly?
A. Yes – the MIT525 has Bluetooth® LE and USB for data transfer to PC or mobile apps.
Q3: Is the MIT525 suitable for high-capacitance assets?
A. Yes – selectable higher test currents reduce charge time for long cables and large equipment.
Q4: What environments can it handle?
A. It’s rated for CAT IV 1000 V up to 3000 m altitude and offers strong environmental sealing for outdoor and industrial use.
Category Comparison:
The MIT525 is in the Advanced range, offering more diagnostic capability, data handling, and noise immunity than the Essential models. It is designed for users who require deeper analysis and reporting but do not need the extreme noise handling and remote control of the Expert range.
Ready to upgrade your kit?
Don’t leave faults to chance—get your Megger MIT525/2 today!
Get the right test equipment at the right price — contact us now for a fast, competitive quote.
💬 Talk to the Experts
Our team is ready to discuss your requirements. Get straightforward advice, proven performance, and reliable solutions that work.
📍 Want to See It in Action?
We’ll bring the demo to you. Book a live on-site demonstration and see our test equipment perform in real-world conditions.