Gas tightness test methods for gas insulated MV and HV switchgear

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G. Govinda Rao
J. Santhosh
B. V. Raghavaiah

Abstract

This paper elucidates the methods used in type testing and factory routine testing to ensure the tightness of SF>/sub<6>/sub< gas used in Medium Voltage (MV) and High Voltage (HV) switchgear as per the latest IEC and CIGRE guidelines. Gas insulated MV (>1 kV to ≤52 kV) and HV (>52 kV) switchgear are frequently being used in electrical power system throughout the world. Mostly, gas insulated MV and HV switchgear contains SF>/sub<6>/sub< as a pure gas or combined with other gases (i.e.: N2) to form a gas mixture. Recent times, distinct emphasis is being paid to reducing gas leakage during design, manufacturing and operation by enhancing gas handling procedures in compliance with Greenhouse gases emission regulations. Typically the assurance of gas tightness of MV and HV Switchgear shall be defined as the lowest possible quantity of SF>/sub<6>/sub< released to the atmosphere. Various test methods are used for tightness test measurement depends upon sensitivity of measurement, quantity and necessity

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How to Cite
Govinda Rao, G., Santhosh, J., & Raghavaiah, B. V. (2014). Gas tightness test methods for gas insulated MV and HV switchgear. Power Research - A Journal of CPRI, 715–722. Retrieved from https://cprijournal.in/index.php/pr/article/view/770

References

  1. "2.10.2 Direct Global Warming Potentials". Intergovernmental Panel on Climate Change. 2007.
  2. CIGRE “SF6 Tightness Guide”, Technical Brochure No. 430: October- 2010.
  3. IEC62271-1:2011 “High-voltage switchgear and controlgear – Part 1: Common specifications”
  4. IEC 62271-200:2011 “High-voltage switchgear and controlgear – Part 200: AC metal enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV”
  5. IEC 62271-203:2011 “High-voltage switchgear and controlgear – Part 203: Gasinsulated metal-enclosed switchgear for rated voltages above 52 kV”.
  6. IEC 60068-2-17:1994“Basic environmental testing procedures – Part 2-17: Tests – Test Q: Sealing”