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Easy Operation sf6 cf4 gas mixtures PORTUGAL

Easy Operation sf6 cf4 gas mixtures PORTUGAL

COLD-WEATHER APPLICATION OF GAS MIXTURE (SF6/N2, a) Provide a gas mixture to avoid the temporary condensation of the SF 6 gas at low temperatures. b) Test the mechanical operation of the circuit breaker at -50oC according to the low-temperature cycle test defined in IEC 56 (this test requires all heaters to be switched off for 2 hours at -50oC and the circuit breaker operated). 2.2 Mixed Gas

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