Webinar (APAC Time) - Calculating HV Cable Sheath Circulating Currents and Standing Voltages
Join us for an expert-led webinar tailored for electrical engineers, cable designers, and system operators aiming to master the principles and calculations behind HV cable sheath circulating currents and standing voltages. This session tackles the complex challenges posed by circulating currents in cable sheaths and the standing voltages they create—both critical considerations for ensuring the thermal performance, reliability, and safety of high-voltage cable systems. Drawing on industry standards and practical experience, the webinar presents both analytical and applied techniques for accurately computing sheath currents and standing voltages across a range of operational and bonding scenarios. Real-world examples and effective mitigation strategies will be discussed, followed by an interactive Q&A.
What You’ll Learn:
Fundamentals of Sheath Circulating Currents - Gain a solid understanding of why circulating currents develop in HV cable sheaths, including both capacitively and electromagnetically induced currents. Learn how different bonding methods—such as solid, single-point, and cross-bonding—affect the magnitude and distribution of circulating currents, system losses, and cable derating.
Standing Voltages: Mechanisms and Risk Management - Discover how various sheath bonding arrangements lead to standing voltages along open-ended sheaths, why it’s essential to control these voltages for insulation integrity and personnel safety, and typical voltage limits applied in the industry.
Analytical and Numerical Calculation Methods - Explore key equations and modelling techniques used to calculate sheath circulating currents and standing voltages, including the effects of sheath and conductor placement, sheath impedance, and multi-circuit arrangements. Practical calculation workflows will be demonstrated, along with tips for using standard software tools.
Bonding System Design & Mitigation Strategies - Investigate practical strategies for reducing sheath losses and managing standing voltages, such as optimised bonding layouts, employing sheath voltage limiters (SVLs) and link boxes, and selecting appropriate earthing points.
Installation Scenarios: Buried, Duct and Tunnel Installations - Examine how installation approaches—whether in air, buried, duct, or tunnel—impact induced voltages and circulating currents. Learn about mitigation measures suited to complex layouts, including high-density corridors and challenging routing scenarios.
Case Studies and Best Practice Approaches - Review real-world case studies and sensitivity analyses, demonstrating how installation choices and bonding design have a direct effect on reliability, thermal ratings, and regulatory compliance across various project types.
Whether you’re addressing sheath loss concerns, designing new HV transmission circuits, or seeking to ensure best practice for compliance and safety, this webinar will equip you with the understanding, tools, and confidence to optimise your HV cable system designs. Don’t miss this opportunity to deepen your expertise and safeguard your cable assets for the long term.
TERMS AND CONDITIONS
Attendees who complete the survey form will receive their certificate within 2–3 business days.
Survey forms expire within 48 hours after the webinar. Please ensure you complete the survey before it expires.
Once the survey has expired, certificates will no longer be issued.
Paid ticket holders who do not complete the survey will still receive the slides and recorded videos, but not the webinar certificate.
Paid ticket holders will receive their slides and recorded videos within 5–6 business days, or as notified, depending on the topic.