GTS tested close to 40 x 11kV XLPE cables which have been in service for more than 25years. This is a part of a diagnostic test which gives the overall conditions and reliability of these cables in service. These test results will also be used as baseline results for future trending. This is very important as the cable insulation may generally start to deteriorate after 25-30 years in operation.
GTS uses the latest technology and different types of test method available in the market for accurate and reliable assessment. GTS has carried out Tan Delta testing using BAUR and HVA Diagnostic Test equipment. The tan delta test on a power cable is using VLF 0.1Hz method. Meanwhile for Partial Discharge testing, GTS have used two different techniques as shown in the photo. GTS uses OWTS (Oscillating Wave Test System) or DAC (Damping AC) Method using SebaKMT equipment, as well as by VLF method using BAUR VIOLA. Both these systems have their own advantages and GTS owns and uses both these systems for the most accurate and reliable results and assessment.