24kV – 630A – up to 21kA
The new multifunctional device SINTER AIR, designed for Minibloc Air MV switchgears, combines switching and isolating functions in a single SF6-free gas mixture insulated unit. This solution allows the switchgear to be approximately one-third more compact than traditional designs with separate circuit breaker and disconnector, while maintaining full functional equivalence.
The new technology behind SINTER AIR multifunctional device takes advantage of the isolating properties of an SF6-free mixtures, while using vacuum bottles to interrupt internal arc.
This exclusive pair ensures a substantial reduction in arc interruption while guaranteeing long lasting durability of the apparatus.
Apparatus operating mechanism
The reduced stroke of the movable contacts and the lower mass in motion (compared to other interruption technologies) allow the use of very low closing and opening energies. These features ensure limited wear of moving parts and achieve a high number of mechanical operations without maintenance (10,000 operations).
SINTER multifunctional apparatus are equipped with a mechanical energy storage mechanism that ensures quick operation, independent of the operator, and can be equipped with a wide range of easily mountable accessories to meet all market needs.
The device structure
All active elements (circuit breaker and line disconnector) are contained within a robust stainless-steel structure that contains the SF6-free gas mixtures. The structure is sealed for life, resin-coated and sealed for life.