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Effect of Roof Height on Internal Arc Testing of Switchgear Panels


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1 Central Power Research Institute, Bengaluru – 560012, Karnataka, India
     

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The market requirements for Medium Voltage (MV) metal enclosed switchgear are getting more and more stringent. Both building costs as well as the level of the transmitted and distributed electrical power have increased rapidly over the recent years and are expected to continue to rise. This means that switchgear manufacturers must bring more and more compact and powerful systems on the market, while being simultaneously as cost effective as possible. Internal Arc Classification (IAC) of switchgear according to IEC and IEEE standards is one of the most important requirements to guarantee safety in case of internal arc faults. Internal arcs cause a sudden pressure rise in electrical installations. This leads to an extreme pressure stress acting on switchgear compartments and switchgear rooms and could cause collapse of buildings This paper describes few important design rules and innovations, which were necessary to achieve best results during internal arc tests. Furthermore it demonstrates the effect of roof height during the internal arc test with the important case studies. Finally the best solution to eliminate the roof effect is also proposed.

Keywords

HP aignhe lSpeed Videography Analysis, IEC 62271-200 and IEEEC37.20.7, Internal Arc Test, Roof Height, Switch Gear panel.
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  • Effect of Roof Height on Internal Arc Testing of Switchgear Panels

Abstract Views: 99  |  PDF Views: 0

Authors

Rajaramamohanarao Chennu
Central Power Research Institute, Bengaluru – 560012, Karnataka, India
S. Sudhakara Reddy
Central Power Research Institute, Bengaluru – 560012, Karnataka, India
Anupam Awasthi
Central Power Research Institute, Bengaluru – 560012, Karnataka, India
Gurudev T. Maroti
Central Power Research Institute, Bengaluru – 560012, Karnataka, India
S. Arun Kumar
Central Power Research Institute, Bengaluru – 560012, Karnataka, India
V. Sreeram
Central Power Research Institute, Bengaluru – 560012, Karnataka, India

Abstract


The market requirements for Medium Voltage (MV) metal enclosed switchgear are getting more and more stringent. Both building costs as well as the level of the transmitted and distributed electrical power have increased rapidly over the recent years and are expected to continue to rise. This means that switchgear manufacturers must bring more and more compact and powerful systems on the market, while being simultaneously as cost effective as possible. Internal Arc Classification (IAC) of switchgear according to IEC and IEEE standards is one of the most important requirements to guarantee safety in case of internal arc faults. Internal arcs cause a sudden pressure rise in electrical installations. This leads to an extreme pressure stress acting on switchgear compartments and switchgear rooms and could cause collapse of buildings This paper describes few important design rules and innovations, which were necessary to achieve best results during internal arc tests. Furthermore it demonstrates the effect of roof height during the internal arc test with the important case studies. Finally the best solution to eliminate the roof effect is also proposed.

Keywords


HP aignhe lSpeed Videography Analysis, IEC 62271-200 and IEEEC37.20.7, Internal Arc Test, Roof Height, Switch Gear panel.

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DOI: https://doi.org/10.33686/prj.v17i2.222076