10 the bellows installed compensator cycle life 10000; bellows the temperature compensator cycle life. Switchgear Assembly compensator performance characteristics: high-voltage combination of electrical compensator as adjacent to the connecting part of the connection between the two devices shell parts, mainly for the relative displacement between the installation and adjustment of compensation foundation, to compensate for thermal expansion and contraction Telescopic volume displacement caused. Most of the ordinary expanded section use a low number of cycles in the high stress (i.e., large displacement), and the compensator is used in low stress (both small displacement) under the high number of cycles. Pressure balanced structure due to the small the stent carrying capacity of the combination of electrical appliances, to design, rely on the resilient force of the disc spring the blind plate force to balance the internal pressure generated in order to reduce the stent force. Air tightness demanding. Filling medium expensive combination of electrical SF6 gas, the annual amount of leakage ≤ 1%, otherwise it will reduce the reliability of the product run, improve qi frequency, will cause serious system outage maintenance. The compensator as an electrical components, the smooth inner surface without any sharp points, otherwise it will generate a discharge, and affect the insulating performance of the product.