Which Megger Insulation Tester is Right for You?

Posted by Protec Tech Team on

Megger MIT1025 10kV Insulation Resistance TesterDepending on the method of inspection, as well as application and installation, a great deal of time and effort could be invested in verifying the electrical health and integrity of electrical insulation. However, insulation resistance tests can be a relatively quick and effortless method of inspecting insulation.  This type of test can be applied to practically any electrical insulation.  Test results are recorded, trended, and if appropriate, compared to manufacturer's recommendations or industry standards and guidelines.  A good insulator should have a very high resistance to leakage current. Environmental, electrical and mechanical stresses can aid in exploiting voids and the development of microscopic cracks. These phenomenon permit increased access for contaminants to migrate into the insulator or insulating systems. When this happens, there is an increased potential for electrical faults and system failures, which relates to compromised reliability of the electrical system.Contact Us Now

If you are looking for a good insulation tester, check out Megger's MIT series. The devices in this product line are the MIT515, MIT525 and the MIT1025. These testers can conduct various tests on insulators like in cables, transformers and motors. They are lightweight, compact and portable which makes them ideal for field testing. They also feature a double case design for extra user protection. These meters are rated CATIV 600 Volts on all terminals and an Ingress Protection 65. Here is a comparison of features of the MIT515, MIT525 and the MIT1025.

Megger MIT515 Insulation Resistance Tester

If you need basic insulation testing, this Megger meter is suitable. It has a variable voltage of 50 Volts to 5 kiloVolts which allows it to measure resistance from 10 kΩ to 10 TΩ. Other features of the MIT515 include:

  • Analog and Digital display
  • Operation through batteries or through AC mains
  • Variable voltage from 50 Volts to 1 kV at 10 Volts increments
  • Variable voltage from 1 kiloVolts to 5 kV at 25 volts increments
  • Measurement of voltage, capacitance, time constant and leakage current
  • Automatic insulation resistance, Polarization Index and Dielectric Absorption Ratio testing
  • Built-in timer control and display
  • 3 milliAmpere test current
  • Alarm limit mode
  • 3 milliAmpere noise rejection
  • 2 percent error guarding 500 kΩ leakage with a 100 MΩ
  • Included accessories:

o   Manual CD

o   Power lead

o   3-meter leadset with medium insulated clips

 

Megger MIT525 5kV Insulation Resistance Tester

This Megger insulation meter is similar to the MIT515 but with additional features. The MIT525 can conduct automatic Step Voltage, Ramp and Dielectric Discharge tests. It also features a real time clock and PC connectivity through USB and RS232 ports. The PC connectivity allows advanced results analysis using the PowerDB Lite software.

Features:

  • Analog and Digital display
  • Operation through batteries or through AC mains
  • Variable voltage from 50 Volts to 1 kiloVolts at 10 Volts increments
  • Variable voltage from 1 kV to 5 kV at 25 volts increments
  • Measurement of voltage, capacitance, time constant and leakage current
  • Automatic Insulation Resistance, Polarization Index, Ramp, Step Voltage, Dielectric Discharge  and Dielectric Absorption Ratio testing
  • Built-in timer control and display
  • 3 milliAmpere test current
  • Measurement of resistance from 10 kΩ to 10 TΩ
  • USB and RS232 ports
  • Real time clock
  • Alarm limit mode
  • 3 milliAmpere noise rejection
  • 2 percent error guarding 500 kΩ leakage with a 100 MΩ
  • Included accessories:

o   Manual CD

o   Power lead

o   3-meter leadset with medium insulated clips

o   USB cable

o   PowerDB Lite Software

 

Megger MIT1025 10kV Insulation Resistance Tester

The MIT1025 is like the 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 Volts increments
  • Variable voltage from 2.5 kiloVolts to 10 kV at 25 volts increments
  • Measurement of voltage, capacitance, time constant and leakage current
  • Automatic Insulation Resistance, Polarization Index, Ramp, Step Voltage, Dielectric Discharge  and Dielectric Absorption Ratio testing
  • Built-in timer control and display
  • 3 milliAmpere test current
  • Measurement of resistance from 10 kΩ to 20 TΩ
  • USB and RS232 ports
  • Real time clock
  • Alarm limit mode
  • 3 milliAmpere noise rejection
  • 2 percent error guarding 500 kΩ leakage with a 100 MΩ
  • Included accessories:

o   Manual CD

o   Power lead

o   3-meter leadset with medium insulated clips

o   3-meter leadset with large insulated clips

o   USB cable

o   PowerDB Lite Software

This comparison can help you 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.

Related electrical test equipment available for rent from Protec:

Metrel 3200 TeraOhm 10kV Insulation Resistance Tester

Megger MIT1525 15kV Insulation Resistance Tester

 

This electrical test equipment is available for rent, lease, or purchase from Protec Equipment Resources. We are here to help you with your testing equipment needs.

Wherever the job takes you (and the equipment), with Protec's multiple locations, we always ship from the office closest to your desired drop location (if the electrical test equipment you need is in-stock at that location), and the equipment can be returned to the nearest office.

We always consider ALL shipping options in order to save you the most time and money.

Also, if you happen to be close to one of our many office locations, walk-ins are always welcome!

Rely on the Electrical Test Equipment Rental Experts, we are there when and where you need us.

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Editor’s Note: This post was originally published May, 2012 and has been updated freshness, accuracy and comprehensiveness.

Topics: Insulation Resistance, Megger Tester

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