Medium-Voltage AC Cable Joints: A Review of Testing Methods, Standards, and Emerging Trends

Abstract

Highlights: What are the main findings? Complete review of standards on MV AC cable joint testing. Complete review of the literature and emerging trends on MV AC cable joint testing. What is the implication of the main finding? Discussion about the current situation on the testing of MV cable joints. Discussion about the key tests to be added/improved in the standard. Discussion about the main factors affecting the performance of MV cable joints. Cable joints (CJs) are essential components of power systems, enabling cable network extension and repair. Their design and installation are critical to ensuring reliability. This paper reviews the international standards, state-of-the-art literature, and emerging trends in medium-voltage (MV) AC cable joint testing. It provides a comprehensive overview of existing testing methods, highlighting innovative approaches. The review covers key international standards for CJ testing, both during design and final manufacturing stages. Additionally, it examines the literature on tests developed for assessing factors affecting CJ performance, including temperature, partial discharges, and tangent delta measurements. Recent advancements in artificial intelligence for CJ testing are also discussed. This work aims to present a thorough perspective on current practices and future directions in MV cable joint testing and diagnostics.