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INTRODUCTION
A method for evaluating medium and high voltage (MV and HV) cables is known as VLF cable testing. VLF devices have the advantage of being made to be compact and lightweight, which makes them handy, especially for field testing where transportation and space can be a problem.
System frequency voltage sources are considerably larger, heavier, and more expensive than their lower-frequency counterparts because the inherent capacitance of a power cable needs to be charged when energised.
Historically, cables were tested in the field using DC hipots, but it has been determined that current cables with polymer-based insulation cannot be successfully tested with DC hipots XLPE, EPR. It has also been demonstrated that DC testing shortens the remaining life of cables with ageing.
VLF to cables in a straightforward withstand strategy to identify potential cable insulation failures (faults) during an anticipated outage. The tested cable must be able to resist an AC voltage without flashover for a predetermined testing period. This approach produces a “pass/fail” result.
Care must be given when stating the voltage to be used for VLF cable testing because multiple wave patterns are frequently employed, including sine and square. Depending on, there are several relationships between RMS and peak voltages.
GLOBAL VLF CABLE TESTING EQUIPMENT MARKET SIZE AND FORECAST
The Global VLF cable testing equipment market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
NEW PRODUCT LAUNCH
Adiradh Energy’s supply A high-performance, portable, compact test and diagnostic system for medium voltage cables is the cable test and diagnostic system VLF Sine 62 kV with integrated tan delta.
The VLF Sine 62 kV tester is a versatile instrument. In addition to VLF and DC testing, it is also capable of sheath testing and sheath fault localization. Additionally, the system can now evaluate both cable integrity and condition thanks to the optional internal tan delta.
Even testing on 35 kV rated cables (up to 25 km) are simple and reliable thanks to the intelligent VLF technology, which automatically adjusts the test frequency to the cable length. Underground cable PDS62-SIN Portable PD Detection and Localization System.
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