Tuesday, May 15, 2012


World record: Siemens furnace switchgear achieves rated currents of 4,500 amperes
Simetal Sivac-X 4K supplies electric arc furnaces with power up to 300 MVA

The Simetal Sivac-X 4K furnace switchgear from Siemens has reliably switched a rated current of more than 4,500 amperes with a single circuit breaker in the test laboratory during the course of a successful type test according to IEC 62271. This is significantly more than conventional furnace switchgears achieve. The switchgear has a rated voltage of 40.5 kilovolts, and can supply electric arc furnaces with power up to 300 MVA. The lightning impulse voltage is 200 kilovolts, which also makes the switchgear suitable for the North American market. The switchgear has achieved the fault arc qualification of IAC A FLR of 40 kA/1 s, thus also meeting the highest demands for personnel safety. The core component is the 3AH4 medium-voltage circuit breaker, which has a life cycle of up to 120,000 switching cycles. The type test according to IEC 62271-200 was performed by the CESI group in Mannheim and Berlin.

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