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All circuit breaker systems have common features in their operation, but details vary substantially depending on the voltage class, current rating and type of the circuit breaker. The circuit breaker must first detect a fault condition. In small mains and low voltage circuit breakers, this is …

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4 2. SF6 & Utilities, EPA & the MOU • SF6 is used extensively in high voltage electrical equipment (1500-2 0lb/ circuit breaker). • SF6 has a GHG potency ~22,200 (23,900 for reporting purposes) times that of CO2, atmospheric lifetime ~3,400 years. • Voluntary

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