ProductsInsulation testers5 kV Digital Insulation Tester
5 kV Digital Insulation Tester

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Digital Insulation Tester

  • Insulation Resistances up to 5 TΩ
  • Automated tests:
  • - Absorption index
    - Polarization index
    - Capacitance
    - Leakage Current
    - AC/DC Voltmeter
  • Step voltage test
  • Switchable filter to remove external noise interference
  • Real time clock and calendar
  • 4,000 readings memory
  • USB Interface
  • Software for data management
  • Built-in printer
  • Rechargeable battery
The digital insulation tester model MD-5075x is Megabras' cutting edge insulation analyzer equipment and it is one of the most complete and sophisticated available in the international market. A powerful software allows for further analysis of tests results, including features such as graphical representation and automatic report generation. Its proven technology provides safe, reliable and accurate measurements of insulation resistances up to 5 TW, with 5 pre-selected test voltages, 250 V - 500 V - 1 kV - 2.5 kV - 5 kV. Other test voltages may be selected in steps of 25 V, 100 V or 500 V.

A state-of-the-art microprocessor controls the equipment operation and enables the incorporation of advanced features which make measurements easier: auto-range selection, 4,000 readings memory, AC/DC voltmeter, automatic measurement of Absorption Index and Polarization Index, leakage current and capacitance measurement, timer enabling programming of test duration, configurable Pass-Fail test, Step voltage test, built-in printer, real time clock and calendar.

Built-in chronometer, indicating elapsed time, in minutes and seconds, since the test started, up to 90 minutes.

Measured values are transmitted through the USB interface and are printed in the built-in printer as a registration of the performed test. Furthermore, the measured values are stored in a non-volatile internal memory. Up to 4000 measurements may be stored, to be transferred afterward to a computer running the MegaLogg2 program. This software allows a further analysis of the test results, including a graphical representation and automatic report generation. The real time clock and calendar, and the sequential test number, facilitates the identification of each test, and the organization of a predictive maintenance system by trend analysis.

MD-5075x is powered using a rechargeable battery. The cabinet is strong and lightweight, easy to carry, impact-resistant and suitable to be used under severe weather conditions. Thus the insulation tester supplies very reliable and accurate measurements both in laboratory and out in the field.

Test voltage

250 V, 500 V, 1,000 V, 2,500 V, 5,000 V directly, one button selectable. 500 V to 5 k V in 25 V, 100 V or 500 V steps. DC, negative.

Maximum resistance reading

5 TΩ @ 1 kV up to 5 kV.
1 TΩ @ 500 V up to 1 kV.
500 GΩ @ 250 V up to 500 V.

DC Voltmeter

10 V up to 1000 Vdc.
Accuracy: ±(5% of reading + 3 digits).

AC voltmeter

10 V up to 1000 Vr.m.s.
Accuracy: ±(5% of reading + 3 digits).

Overvoltage category

CAT. III - 600 V.

Leakage currente measurement

1 nA up to 3 mA ±(10% of reading + 3 digits).

Capacitance measurement

50 nF up to 10 µF @ 500 V.
50 nF up to 5 µF @ 1,000 V.
30 nF up to 2 µF @ 2,500 V.
30 nF up to 1 µF @ 5,000 V.
Accuracy: ±10% of reading ± 3 digits.

Short circuit current

Max. 3 mA.

Test voltage accuracy

± 3% of nominal test voltages on GΩ.

Insulation tester basic accuracy

± 5% of reading 1 MΩ to 1 TΩ @ 5 kV.
± 20% of reading 1 TΩ to 5 TΩ @ 5 kV.
((for lower test voltages, the upper limit will be reduced proportionally).
± 20% of reading 10 kΩ to 100 kΩ.
± 10% of reading 100 kΩ to 1 MΩ.

Advanced features

Automated Polarization Index calculation.
Automated Dielectric Absorption Ratio calculation.
Programmable Pass-Fail test.
Step Voltage Test.
4,000 Readings memory.
Switchable filter to remove external noise interference.

Built-in printer

Prints elapsed time, actual voltage and resistance measured each 15 seconds.



Built-in chonometer

Shows elapsed time in mm:ss format. Count starts automatically for each measurement.

MegaLogg2 Software

Friendly, easy to use software. Tests are represented in graphic and tabular views. With automatic report generator, including the operator's commentaries.

Environmental protection

IP54 (with closed lid).

Safety Class

In accordance with IEC 61010-1.


In accordance with IEC 61326-1.

Electro magnetic irradiation immunity

In accordance with IEC 61000-4-3.

Electrostatic immunity

In accordance with IEC 61000-4-2.

Power supply

Internal rechargeable (LiFePO4 12.8 V - 6000 mAh).

Battery charger

12 V - 2 Amp.

Operating temperature range

-5°C to 50°C.

Storage temperature range

-25°C to 65°C.

Humidity range

95% UR (non condensing).


Approx. 4.3 kg.


340 x 295 x 152 mm.

Included accessories

2 Measuring test leads.
1 AC Adapter.
1 GUARD test lead.
1 MegaLogg2 software.
1 User guide.
1 Protective bag.
1 USB cable.

Images for illustration purposes only. Megabras reserves the right to change design and specifications without prior notice.

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