The Megger MIT515 is a compact, lightweight 5 kV high-voltage insulation tester made for diagnosing and maintaining electrical equipment. It measures resistance all the way up to 10 TΩ, gives you selectable test voltages from 250 V to 5,000 V, and comes with a CAT IV 600 V safety rating.
Key Specs & Features
Testing Range: Measures up to 10 TΩ.
Test Voltage: Easily select between 250 V, 500 V, 1000 V, 2500 V, and 5000 V.
Diagnostic Tests: Runs timed IR tests, Polarization Index (PI), Dielectric Absorption Ratio (DAR), and Dielectric Discharge (DD).
Power Source: Runs on a fast-charging Li-ion battery, or you can plug it straight into AC power if the battery dies.
Build & Safety: Rated CAT IV 600 V, built into a tough dual-case design, and automatically discharges capacitive loads.
Noise Immunity: Features high noise rejection (up to 3 mA) so you get steady, accurate readings even in active substations.
FAQ
What’s the main difference between the Megger MIT515 and the MIT525 or higher models (like the MIT1025 and MIT1525)?
In short: It really comes down to data storage, PC connectivity, and extra diagnostic tests. The MIT515 is designed as an entry-level, essential model built for quick, on-the-spot field testing without digital data logging.
Data Storage & Export
Can the Megger MIT515 save test results and export them to a flash drive or PC?
In short: No. megger mit515 is part of the entry-level “Essential Range,” so it doesn’t have any internal memory or a USB port for data transfer. You’ll need to jot down the readings manually straight from the screen once your test is done. If saving and exporting data is a must-have for you, you’ll want to step up to the megger mit515.
Supported Test Modes
What test modes does the MIT515 actually support?
In short: It handles all your standard basic and diagnostic tests, including standard Insulation Resistance (IR), Timed IR, Polarization Index (PI), and Dielectric Absorption Ratio (DAR). Just keep in mind it doesn’t include Step Voltage (SV) or Ramp Test modes.
Battery & Power
What happens if the battery dies in the middle of a field job?
In short: You can keep right on testing! megger mit515 price runs on line power, meaning you can plug it straight into an AC outlet or a generator to keep running tests while charging up the internal Li-ion battery at the same time.
Substation Safety & Accuracy
Is this unit safe and accurate to use in active high-voltage substations?
In short: Absolutely! It comes equipped with 3 mA Noise Rejection, which filters out electromagnetic interference and induced currents from high-noise electrical environments like active substations. This keeps your on-screen readings steady and reliable.
What Is the “Guard” Terminal For?
What does the blue “GUARD” terminal actually do?
In short: The Guard terminal helps block out surface leakage currents caused by dirt, dust, or moisture. By connecting the blue lead to the outer surface of the material, you ensure your readings reflect the pure internal insulation quality rather than electricity bleeding across surface grime.
Troubleshooting Voltage Errors
Why is the screen showing a voltage error or failing to inject high voltage?
In short: This usually happens for one of two reasons:
External Voltage Detected: The unit picks up residual voltage or a strong external induction on the tested cables before you even press “TEST” (it automatically locks out to keep you safe).
Internal Component Damage: The internal Measurement Board or high-voltage circuit got damaged—often from a hard bump or drop—and needs servicing or recalibration at an authorized repair center.
