Electric field around the outer insulator of a 10 kV solid insulation vacuum circuit breaker

LUO Ling; YANG Zhaoxiang; MEI Hongwei; ZHAO Chenlong; WANG Liming; GUAN Zhicheng

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Journal of Tsinghua University(Science and Technology) ›› 2015, Vol. 55 ›› Issue (5) : 585-591.

ELECTRICAL ENGINEERING

Electric field around the outer insulator of a 10 kV solid insulation vacuum circuit breaker

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Abstract

10 kV solid insulation vacuum circuit breakers are widely used in electrical distribution networks. The effects of the space between the insulator and the metal cover and the cover itself on the electric field intensity around the outer insulator were analyzed for a solid sealed pole. Realistic 3-D simulation models were built in Solidworks. A simplified model of an aluminum solid sealed pole was set up with the external shielding grounded. The electric field intensity was predicted using Ansoft Maxwell 3D. The results indicate that the electric field intensity around the outer insulator has a large range. A metal shield increases the electric field intensity of the solid sealed pole. If there are some bubbles in the solid epoxy sealed pole, the metal shield may aggravate the partial discharges.

Key words

solid insulation / vacuum circuit breaker / epoxy / insulator / electric field calculation

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LUO Ling, YANG Zhaoxiang, MEI Hongwei, ZHAO Chenlong, WANG Liming, GUAN Zhicheng. Electric field around the outer insulator of a 10 kV solid insulation vacuum circuit breaker[J]. Journal of Tsinghua University(Science and Technology). 2015, 55(5): 585-591

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