Megger Group Ltd.
Megger has been a leader in electrical test and measurement globally for 130 years. From power generation to the power outlets in your home, Megger products cover almost every application within the Electrical Supply Industry.
- +44 (0) 1304 502101
- uksales@megger.com
- Archcliffe Road
Dover, CT17 9EN
United Kingdom of Great Britain and Northern Ireland
Categories
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Oil Tan Delta Tester
OTD
The Oil Tan Delta (OTD) is a laboratory instrument, which measures the Tan Delta, Resistivity and Relative Permittivity of insulating liquids. These tests give a wider picture of the overall quality of the insulating oil, and will indicate if there is any contamination. Megger has developed features of the OTD to ensure that productivity levels within laboratories are maximised. The microprocessor controlled inductive heater means that there is uniformity of temperature throughout the cell, in compliance with IEC 60247, and for cooling a fan effectively speeds up the cell cooling time. The instrument has a temperature measuring range of 10 to 110 C, with an accuracy of 1 C. It can be set to preheat before testing takes place. The automated oil drain facility negates the need to move the oil vessel. User safety is paramount and with this in mind, Megger have designed independent and dual redundant high voltage cut-off circuitry. If for any reason the user needs to abort the test, this can be done so by pressing any key, immediately terminating the test and removing the high voltage. The design of the cell components maximise oil fill rate but minimise turbulence in oil flow and eliminate trapping of air. With only 32 cell components, it is easy to assemble and disassemble.
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Battery Testing
With the increasing dependency of back up systems on battery strings, and the escalating cost of replacing batteries, instrumentation and software systems that can measure, trend and manage the life-cycle of cells is a cost effective option.
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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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Cable Fault, Test And Diagnostics
Allows an operator to test twisted pair cables for faults without physically disconnecting the cables from the switch.
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Insulation Testing
Measures the total resistance between any two points separated by electrical insulation.
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Time Domain Reflectometers
Locating high and low impedance faults on paired metallic cables is a crucial yet often difficult task for a telecoms engineer. Megger designs TDRs specifically for the communications industry, which makes each unit a safe, application specific tester that can be used on virtually all communications cable types. The wide range of TDRs makes it easy to choose the tester with the resolution and range you need.
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Turns Ratio Testing
The transformer turns ratio test, or TTR test, confirms that the transformer has the correct ratio of primary turns to secondary turns. Using this test correctly can help to identify tap changer performance, shorted turns, open windings, incorrect winding connections and other faults inside transformers. Megger’s range of TTR testers are robust to withstand the harsh conditions that some transformer testing in. The range includes varying features to simplify and speed up testing as well as 3 phase TTR testers and PT and CT TTR testers.
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Three Phase Relay Testing
Our comprehensive and intuitive relay software speeds up testing times with a vast library of pre-defined test regimes or manual operation.
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Multimeters and Clampmeters
The complete range of analog, digital and analog/digital multimeters provide the solution to electrical and electronic fault finding and testing.
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Transformer Resistance Testing
Transformer insulation resistance deterioration is one of the most common causes of transformer failure: a failing transformer is a costly replacement in an electrical system with the potential for a long downtime. If you fail to maintain your transformer with regular insulation resistance testing (as can be carried out by the Megger Transformer Ohmmeter (MTO) series of transformer test equipment) then it’s likely to fail before reaching its maximum operating life.
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DC Overvoltage or Withstand Testing
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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Low Voltage Testers
Device used to identify opens and shorts in applications that are driven on low voltages.
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Ground Testing
Ensuring an effective earth system is essential in a telecommunications system, and Megger is expert in earth testing having been there right from the start. These days Megger offers top end systems for design and soil surveys as well as tough easy to use testers for field engineers. We have tried to make the testers self checking as much as we can, to allow you to concentrate on collating and understanding the results.
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Low Resistance Ohmmeters
Some times know as Ducter testers, these are highly accurate, easy to operate instruments that measure resistance with resolution as fine as 0.1 micro-ohm. Digital micro-ohmeters and DLROs measure contact resistance of switch and circuit breakers, aircraft frame bonds, and rail and pipeline bonds just to name a few of the applications. Megger has models available for testing using test currents from 0.5 mA to 200 amps covering a multitude of applications that require precise low-resistance measurements.

















