Megger MIT1525 15 kV Insulation Resistance Tester
- MIT1525/2 from the ‘Advanced Range‘
The Megger MIT1525 is the most powerful model in Megger’s Advanced range, offering up to 15 kV output for testing the insulation integrity of extra-high-voltage (EHV) equipment.
With a resistance measurement range up to 30 TΩ, advanced diagnostics, and selectable test currents, the MIT1525 is designed for engineers and technicians who need the highest voltage capability in the Advanced category while maintaining portability and ease of use.
Why choose the Megger MIT1525?
If you work with EHV transmission assets, long cables, or large generators, the MIT1525’s 15 kV test range provides the headroom needed to meet stringent testing standards.
It offers all the advanced features of the MIT525 and MIT1025 — including memory storage, USB/Bluetooth® transfer, and advanced test modes — but with the additional capability to test at 15 kV and a CAT IV 1000 V safety rating up to 4000 m altitude.
Key features of the Megger MIT1525:
- RE>Act mode for improved accuracy and safety.
- Patented PI predictor (PIp) – shortens PI test times.
- Measures up to 30 TΩ at 15 kV.
- ±5% accuracy to 3 TΩ at 15,000 V.
- Advanced diagnostic modes: PDC, Ramp, Dielectric Discharge.
- Noise rejection up to 6 mA for reliable results in HV environments up to 230 kV.
- Selectable test currents: 1 mA, 3 mA, 6 mA.
- Onboard memory with time/date stamps.
- USB and Bluetooth® LE connectivity.
- Safety rated CAT IV 1000 V to 4000 m altitude.
- Rugged dual-case design with large backlit colour display.
↑ 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.
Specifications:
| Feature | Details |
| Max Test Voltage | 15 kV |
| Insulation Resistance Range | up to 30 TΩ |
| Accuracy | ±5% to 3 TΩ at 15,000 V |
| Noise Rejection | up to 6 mA |
| Test Currents | 1 mA, 3 mA, 6 mA (6 mA on mains) |
| Safety Rating | CAT IV 1000 V, 4000 m altitude |
| Connectivity | USB and Bluetooth® LE |
| Memory | Time/date stamped onboard storage |
| Display | Large, backlit colour display |
| Design | Dual case, impact and ingress protection |
Built for your environment
The MIT1525 is engineered for extreme field use, from high-voltage substations to remote transmission sites. Its dual-case design resists physical impact, dust, and moisture, while its high noise immunity ensures accurate results even in challenging HV electrical environments.
The bright, high-contrast colour display makes it easy to read results in direct sunlight or low light.
Applications:
- Testing EHV transmission cables and switchgear.
- Commissioning and maintenance of large motors, generators, and transformers.
- High-voltage maintenance in utility and industrial sectors.
- Long-term trend analysis and asset condition monitoring.
What comes with the Megger MIT1525?
- MIT1525 insulation resistance tester
- Li-ion rechargeable battery (pre-installed)
- Mains power lead
- Test leads rated for 15 kV
- User guide and quick-start lid reference
- Carry-all holdall with removable lid pouch
❓ Frequently Asked Questions (FAQ)
Q1: Why choose 15 kV over 10 kV?
A. 15 kV capability is often required for EHV assets, long transmission cables, and testing to higher industry standards.
Q2: Does it have the same advanced features as the MIT1025?
A. Yes – the MIT1525 includes all the diagnostics and connectivity of the MIT1025, but with higher voltage output and CAT IV 1000 V safety up to 4000 m.
Q3: Can I use it in high-noise environments?
A. Yes – it has up to 6 mA of noise rejection, suitable for HV work up to 230 kV.
Q4: Can I adjust the test current?
A. Yes – selectable between 1 mA, 3 mA, and 6 mA depending on application needs.
Category Comparison:
The MIT1525 is part of the Advanced range, offering the most voltage capability in its category. Compared to the Essential range (MIT515, MIT1015), it adds:
- Onboard memory and data transfer.
- Advanced diagnostics (PDC, Ramp, DD tests).
- Higher noise immunity (6 mA vs 3 mA).
- Selectable test currents.
The Expert range (S1-568, S1-1068, S1-1568) builds on this with:
- Even greater noise immunity (8 mA).
- Remote control capability.
- Adaptive filtering for extreme EHV environments up to 1000 kV.
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