What is the difference between the SF6 technology and the Vacuum technology used in Schneider Make MV Circuit Breaker.

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SF6 and Vacuum are the two modern breaking techniques in the field of Medium Voltage. Refer the below table for the comparison of these two technologies:

Protection & Switching of:	Vacuum	SF6
Protection & Switching of:	Vacuum	SF6
Breaking medium Checking	no	yes
Failure rate (MTBF)	target as SF6	4 / 10000 units per year
Sealed for life	yes	yes
Maintenance	no	no
Life time	30 years	30 years
Mechanical Endurance	10000 operations	10000 operations
Electrical Endurance	50 to 100 operations @ Isc	20 to 50 operations @Isc
Overheads Line Transformer	(IEC E2 class possible higher TRV)	(IEC E2 class possible higher TRV)
Motor	Circuit Breaker Contactor + protection	Circuit Breaker Contactor
Capacitor Bank	(IEC C1 class : low probability of restrikes)	(IEC C2 class : no reignition, no restrikes)
Arc Furnace	CB	CB
Arc Furnace	CB + protection	CB + protection

Released for:Schneider Electric Nigeria

Published on:27/04/2010Last Modified on:09/09/2025

Range:

MiCOM C264

Range:

MiCOM C264