Service Restoration Communication

Electric System Reliability (SAIFI) With the continued focus on electric system reliability, the electric industry as a whole as decreased the number of service interruptions (outages) dramatically. As the figure illustrates, 1st quartile U.S. electric utilities are providing SAIFI performance of slightly less than 1.0 (2005 data). This represents generally a 25 to 35 percent reduction...

Sulfur Hexafluoride (SF6): A GHG and Environmental Challenge

What is SF6? Sulfur Hexafluoride or SF6 is an artificial gas commonly used in high voltage electrical equipment such as circuit breakers and substation switchgear, primarily as an insulation medium due to its great arc quenching characteristics. What about discharges? Substation Switchgear In most instances SF6 is contained in closed systems that remain sealed throughout the equipment’s entire...