Megger MIT515 5 kV Insulation Resistance Tester
- MIT515/2 from the ‘Essential Range‘
The Megger MIT515 is a 5 kV Essential range insulation resistance tester designed for reliable, high-accuracy testing in electrical maintenance, commissioning, and troubleshooting. Engineered for industrial users, service contractors, and utility technicians who need dependable performance without unnecessary complexity, the MIT515 delivers insulation resistance measurements up to 20 TΩ with ±5% accuracy up to 1 TΩ.
Featuring Megger’s patented PI predictor and innovative RE>Act mode, this tester offers time savings, increased measurement reliability, and enhanced operator safety in every test. Whether you are working in substations, manufacturing plants, or remote field locations, the MIT515 combines portability, robust construction, and world-class Megger safety standards.
Why choose the Megger MIT515?
If you need a 5 kV insulation resistance tester that covers all the core tests with no compromise on safety or accuracy, the MIT515 is the perfect choice. As part of the Essential category, it is ideal for “go/no-go” testing, periodic maintenance checks, and insulation health assessments where advanced diagnostic features are not required. You get Megger’s proven build quality, intuitive operation, and outstanding measurement stability — without paying for extras you may never use.
Key features of the Megger MIT515:
- RE>Act mode for accurate results – measures and manages reabsorption currents before and after testing to prevent false readings.
- PI predictor (PIp) function – patented technology that predicts Polarisation Index results in as little as three minutes, saving valuable test time.
- Measures insulation resistance up to 20 TΩ at 5 kV.
- ±5% accuracy to 1 TΩ at 5000 V.
- 3 mA for noise rejection, providing stable readings in LV and MV environments up to 45 kV.
- Safety rated CAT IV 1000 V (up to 3000 m altitude).
- Operates from a rapid-charge Li-ion battery or AC mains supply.
- Dual-case design – rugged outer case and fire-retardant inner case for added durability.
- Large, backlit colour display with wide viewing angle, even in sunlight.
Specifications:
| Feature | Details |
| Max Test Voltage | 5 kV |
| Insulation Resistance Range | up to 20 TΩ |
| Accuracy | ±5% to 1 TΩ at 5000 V |
| Noise Rejection | up to 3 mA |
| Safety Rating | CAT IV 1000 V, 3000 m altitude |
| Power Supply | Li-ion rechargeable battery / AC mains operation |
| Display | Colour, backlit, high-contrast for outdoor visibility |
| Design | Dual case with impact and dust/moisture resistance |
Built for your environment
The MIT515 thrives in demanding environments. The dual-case design protects the instrument from knocks, drops, dust, and moisture during transportation or operation. Its IP-rated enclosure keeps it safe in harsh site conditions, and the large colour display remains readable in direct sunlight. Whether working in a climate-controlled plant or in the middle of a windswept substation yard, you can count on the MIT515 for consistent, safe, and accurate insulation testing.
- Power utilities: Maintenance of transformers, switchgear, and cables.
- Industrial facilities: Troubleshooting motors, generators, and electrical panels.
- Electrical contractors: Commissioning and inspection of installations.
- Preventive maintenance programs: Routine insulation health checks to reduce unplanned downtime.
What comes with the Megger MIT515?
- MIT515 insulation resistance tester
- Li-ion rechargeable battery (pre-installed)
- Mains power lead
- Double-insulated test leads with 5 kV-rated clips
- User guide and quick-start lid reference
- Carry-all holdall with removable lid pouch
❓ Frequently Asked Questions (FAQ)
Q1: Does the MIT515 store test results?
A. No – as an Essential range tester, it is designed for real-time testing without onboard storage.
Q2: Can it operate in noisy electrical environments?
A. Yes – it has 3 mA of noise rejection for LV/MV environments up to 45 kV, but Advanced or Expert models are recommended for extreme HV/EHV conditions.
Q3: Can I operate it while charging?
A. Yes – it can run on AC mains if the battery is low, but charging pauses during testing.
Q4: Is it portable?
A. Absolutely – lightweight, compact, and supplied with a durable carry case for field mobility.
Choosing the right insulation resistance tester
The Essential range is perfect if you need robust, reliable insulation testing for maintenance and commissioning without advanced diagnostics or data logging. If your work involves high-voltage transmission systems, remote operation, or detailed trend analysis, you may want to consider the Advanced range (e.g., MIT525/2, MIT1025/2) or Expert range (e.g., S1-568/2) for additional features such as PDC testing, selectable test currents, enhanced noise immunity, and remote control capability.
Category Comparison:
The Essential Range – The MIT515/2 (5 kV) and new MIT1015 (10 kV), are designed for straightforward "go/no-go" insulation resistance testing. Both models offer advanced features like RE>Act mode and a PI predictor (PIp) function. They measure up to 20 TΩ with up to 3 mA of noise rejection and include on-board memory for convenience. Models: MIT515, MIT1015.
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