Choose the Megger Insulation Tester That is Right for You

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POSTED BY Protec Tech Team

Testing electrical insulation can be quick and easy when using test equipment specifically designed to perform insulation resistance measurements. A good insulator should have a very high resistance to current flow.  Factors such as temperature, electrical and mechanical stresses, weather and moisture ingress are all capable of adversely impacting the characteristic qualities of materials that make them such good insulators. The degradation of these materials over time can result in unplanned outages, safety concerns for personnel and an overall degradation of power system reliability.  

If you are looking for a good insulation tester, check out Megger's MIT series. Two of the devices in this product line are the Megger MIT525 and the Megger MIT1025. These testers are capable of performing insulation measurements on on a variety of power system components including cables, transformers and motors. They are lightweight, compact and portable; which makes them ideal for field testing. They also feature a double insulated case design for extra user protection. These meters are rated CATIV 600 Volts on all terminals and have an Ingress  Protection 65 rating. Here is a comparison of features of the MIT525 and the MIT1025.

Megger MIT525 5kV Insulation
Resistance Tester

Megger_MIT525_Megger MIT525 5kV Insulation Resistance Tester

The  Megger MIT525 can conduct automatic Step Voltage, Ramp and Dielectric Discharge tests.

Features

·  Analog and Digital display

·  Operation through batteries or through AC mains

·  Variable voltage from 50 Volts to 1 kV at 10 Volt increments

·  Variable voltage from 1 kV to 5 kV at 25 volt increments

·   Measurement of voltage, capacitance, time constant and leakage current

·  Automatic Insulation Resistance, Polarization Index, Step Voltage, Dielectric Discharge  and Dielectric Absorption Ratio testing

·  Built-in timer control and display

·  3 mA test current

·  Measurement of resistance from 10 kΩ to 10 TΩ

·  USB and RS232 ports

·  Real time clock

·  Alarm limit mode

·  3 mA noise rejection

· Includes Guard Terminal to exclude unwanted leakage currents from measurements; ensuring a more accurate measurement.

 

Megger MIT1025 10kV Insulation
Resistance Tester

Megger MIT1025 10kV Insulation Resistance Tester

The Megger MIT1025 is like the  Megger  MIT525 when it comes to features but has a higher test voltage output and a wider range of resistance measurement.

Features

·  Analog and Digital display

·  Operation through batteries or through AC mains

·   Variable voltage from 100 Volts to 2.5 kV at 10 Volt increments

·  Variable voltage from 2.5 kV to 10 kV at 25 volt increments

·  Measurement of voltage, capacitance, time constant and leakage current

·  Automatic Insulation Resistance, Polarization Index, Step Voltage, Dielectric Discharge  and Dielectric Absorption Ratio testing

·  Built-in timer control and display

·  3 mA test current

·  Measurement of resistance from 10 kΩ to 20 TΩ

 ·  USB and RS232 ports

·  Real time clock

·  Alarm limit mode

·  3 mA noise rejection

· Includes Guard Terminal to exclude unwanted leakage currents from measurements; ensuring a more accurate measurement.

Use this comparison to help determine the most suitable meter for your testing needs. Choosing the right meter will help you get tasks done easily and also give you the best value for your money.

Megger is one brand you can count on, and Protec offers for rent, lease or purchase all the electrical testing equipment you need to get the job done. 

Editor’s Note: This post was originally published October, 2013 and has been updated freshness, accuracy and comprehensiveness.

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