For more than 40 years, XLPE cable infrastructure has been used world-wide to distribute electricity in urban areas. Over that same period, cable management has relied on conjecture with asset managers making decisions based solely on the age of the cable or inconclusive test results. Other testing methods can sometimes put cables at a risk of failure and have varied results. This has made testing cost-prohibitive for some and resulted in many using an age-based replacement schedule.
CableQ uses DC Polarization/Depolarization to test cable health and that testing is backed by the expertise of the National Research Council of Canada (NRC). The NRC is the Government of Canada’s largest research organization supporting industrial innovation, the advancement of knowledge and technology development. CableQ’s method of testing XLPE cable was developed by the NRC with extensive testing and research over the last thirty years. The NRC Metrology Research Centre is Canada’s national metrology institute and is universally respected for providing trusted measurement science advice, measurement standards development and metrological services to government and industrial clients.
The testing that CableQ provides uses a health index to assess the condition of medium voltage cable based on the progression of water trees. There has been a consistent correlation between a higher value health index and the length and density of water trees within the insulation. This method gives an accurate representation of the health of the cable by diagnosing the condition of the insulation and is backed by the international credibility for measurements coming from NRC Metrology.
Learn more about the important work NRC Metrology does.