Megger MIT30 Insulation Resistance Tester



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  • Specifically designed for ungrounded test samples only
  • Continuously variable test voltage from 0 to 30kV
  • Test current 0 to 330 μA
  • Output voltage accuracy, + 1.5% (full scale)
  • Built-in adjustable ionization indicator
  • Fail-safe grounding and “zero-start” switches
  • Fast charging of high-capacitance samples
  • User selectable current trip points
  • Current guard circuit avoids external interference
  • Universal input 85-264 V ac, 47-440 Hz
  • Output current overload relay
  • Protected output for both short/open circuit conditions
  • Fused power inlet module
  • Rugged, compact, lightweight, and portable
  • Ergonomic design ensures ease of use

What's in the Box

  • HV triaxial output cable, 3 m
  • Input power cord, 120 V
  • Input power cord, 230 V
  • Instruction manual

The Megger MIT30 is a portable 30-kV insulation tester that has been developed to undertake tests on ungrounded test samples. It satisfies the demand for a variety of high voltage, high accuracy, and low current applications. The MIT30 CANNOT be used on grounded/earthed test samples. Otherwise, the unit will be damaged.

The MIT30 has a test current of up to 330 μA, and user-selectable trip levels from 0 to 360 μA. The MIT30 provides protection to the test piece against flashovers (arcing) and further damage in the event of a breakdown. An audible ionization indicator gives an audio indication of any electrical discharges present during the test period.

The MIT30 can be used to perform step-voltage and proof tests which, when incorporated into a routine maintenance program, can aid in predicting potential failure before breakdown occurs.

The Megger MIT30 insulation tester will operate from a wide range of input voltages and frequencies. The unit will will operate from 85-264 V ac with a frequency range of 47-440 Hz.

Megger Discharge Stick
70 kV high-voltage discharge stick