medium voltage sf6 gas Leak Control
Abnormal LeakageInternal FaultExternal FireThe method of risk assessment is similar to that used in section "leakage from SF6 – filled equipment" which deals with normal leakage. The same case study data will be used for high and medium voltage situations. In the calculations that follow it is assumed that all of the SF6 in one circuit breaker escapes suddenly and it is again assumed that the switch room is sealed and that ventilation is inoperative. (see figure 1). In practice, attention would be drawn to an abnormal leak by underpressure detectors fitted to the CBs. These normally operate around 80% of normal filling pressure, and at this point in time, only 20% of the available SF6 would be in the atmosphere, leading to an SOF2concentration of 1,8 ppmv. In the case of abnormal leakage of SF6 in a medium voltage indoor substation (see figure 2 ), the SOF2 related to complete escape of SF6 from one CB would reach 17,5 ppmv. The concentration of SOF2in the switchroom at 20% relative pressure loss (commonly the alarm level) w...See more on electrical engineering portalReviews: 1Estimated Reading Time: 8 minsPublished: 28/6/2017SF6 Leak Detectors and Gas Analysis Equipment WIKA blog blog.wika.us/.../sf6 leak detection and gas analysis13/5/2021The transmission and distribution industry relies on sulfur hexafluoride to insulate medium and high voltage equipment. Leak detectors and gas analysis instruments ensure that the SF 6 is pure enough – and in sufficient quantity – to quench electrical arcs. The
