Shielded and Solid Insulation System (SSIS)

Premset is 15 kV vacuum circuit breaker switchgear technology that takes advantage of the innovative shielded solid insulated system (2SIS). 2SIS creates a three-layered system (medium voltage conductive layer, epoxy insulating layer, and grounded shield layer) throughout the entire switchgear that optimizes performance and increases life expectancy. Premset reduces the opportunity of arc flash or contact with live parts by insulating and screening all live parts in an epoxy dielectric molding. In addition, a grounded shield layer helps reduce the likelihood of exposure to electrical hazards while at the same time better protecting the insulating material from harsh environmental conditions such as moisture, dust, chemicals, and vermin.

Premset delivers a compact architecture that is both modular and flexible. It allows for front-only accessibility (bottom incoming cables) and the smallest 15 kV vacuum circuit breaker footprint on the market. Plug-and-play design of accessories and auxiliaries makes even last minute or field modifications possible. Modular design improves cost savings and optimizes delivery times. Premset’s modular configurations make it a great fit for applications and intuitive to learn for operators. Premset has options for both indoor and outdoor enclosures with transitions to dry type transformers.

Listed Metal-Enclosed Interrupter Switchgear