Photovoltaic

For solar panel installations, problems such as insulation resistance degradation or issues with ground/earth continuity can pose a risk to safety as well as efficient operation. Continuous and predictive maintenance is essential to ensure regulatory compliance as well as the prevention of electrical hazards and fire risks, and enables operators to ensure the optimal performance of PV installations.

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Insulation Testing

Megger Group Ltd.

Measures the total resistance between any two points separated by electrical insulation.

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AC Insulation Testing

Megger Group Ltd.

AC insulation tests are a popular response to the increasingly demanding industrial, power and domestic marketplaces. Insulation materials have had to become more efficient to keep up with demand; more efficient equipment requires less insulation material to meet the minimum acceptable value of insulation resistance. In turn, cables have become smaller and lighter. However, under certain higher stress testing conditions such as DC testing, cables like Crossed Linked Polyethylene (XLPE) can quickly degrade.

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DC Insulation Testing

Megger Group Ltd.

Diagnostic insulation testing today represents over a hundred years of constant development. When Sydney Evershed pioneered the first insulation tests in the late 19th century, the only measurable values were insulation at 500 volts and a basic continuity check. However, measurement techniques have continuously evolved to keep pace with new insulation technologies. From electronic design and household wiring to generators and power transmission systems, all different kinds of insulation must operate at a safe minimum value.

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DC Hipot Testing

Megger Group Ltd.

Megger is the originator of the insulation tester with over 100 years of experience and leadership in providing high performance insulation testers for electrical equipment diagnostic applications. Regular insulation testing is one of the most cost effective methods of identifying aging in any type of electrical equipment. With over 60% of equipment failures being ascribed to insulation breakdown, it is a key area to monitor for early identification of potential failure problems.

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Insulation Resistance Testers < 1 kV

Megger Group Ltd.

With over twenty 1-kV models to choose from, selecting the proper Megger insulation tester can appear a bewildering task at first. Actually all the process requires is a little organization. All Megger insulation testers perform essentially the same test in fundamentally the same manner - accurately and reliably. Refinements and added features, however, separate one model from another in application and operator appeal.

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VLF Insulation Testing

Megger Group Ltd.

VLF testing uses very low frequencies as part of an AC cable maintenance routine. VLF testers are smaller and more practical than AC testers but output the same amount of power as a 50 Hz mains device. This combination of size and power makes Very Low Frequency cable testing perfect for testing longer sections of cable and apparatus

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DC Overvoltage or Withstand Testing

Megger Group Ltd.

Overvoltage protection is critical to the long-term health of any cable. DC overvoltage testing (also known as withstand testing) is the most popular method of general condition and integrity assessment in the power, industrial and domestic markets. This method of testing is distinguished a number of key advantages:

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Photovoltaic

Topics

Insulation Testing

AC Insulation Testing

DC Insulation Testing

DC Hipot Testing

Insulation Resistance Testers < 1 kV

VLF Insulation Testing

DC Overvoltage or Withstand Testing