Due to its first-class properties it is used in enclosed medium and high voltage switchgear as an arc quenching and insulating gas.
As SF6 is a major greenhouse gas with high global warming potential listed in the Kyoto protocol it is among the six gases being subject to monitoring.
SF6 has to be used in closed systems in order to avoid emissions.
Measuring instruments are used to monitor ambient air, trace leaks and to measure the SF6 quality in medium and high voltage switchgear.
The SF6 gas must always be pure since humidity and toxic or corrosive decomposition products in circuit breakers impair the insulating properties of the gas.
The gas quality has to be monitored in accordance with the EC 842/2006 directive on fluorinated gases and the succeeding Review Protocol 517/2014. The IEC 60480 directive also stipulates the limit values for the re-use of SF6 gas.
It is absolutely necessary to know the gas quality before carrying out maintenance works on a circuit breaker in order to be able to decide on preparation, re-use or disposal of the SF6 gas.
The DILO SF6 Multi-Analyzer with gas return system is a user-friendly and compact device which allows determination of up to six parameters with only one measurement. No SF6 gas is released into the atmosphere.
With the DILO SF6 Multi-Analyzer the following parameters are measured:
• SF6 concentration (%)
• Moisture concentration
• SO2 concentration (ppmv )
• Option: HF concentration, H2S concentration, CO concentration (in ppmv each)
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