Crown Technical Systems offers a comprehensive line of medium voltage metal cald switchgear using air or vacuum circuit breakers including 5 through 27 KV. Switchgear is designed to meet IEEE, NEMA and ANSI specifications. The switchgear is factory manufactured and range from single cubicle to many cubicles and can be housed in an outdoor metal building; ready to be installed on a concrete pad in a substation.Major purchased parts include circuit breakers, potential and current transformers and protective relays. In-house work includes bus design and fabrication, cubicle design and fabrication, equipment layout on doors, detailed schematic design and wiring drawing development. Interlock design and key interlocks are provided with switchgear line-ups.

Switchgear cubicle and switchgear rear sections are made of 11 gauge cold rolled or galvannealed steel, fully welded to form rigid structures. Parts are fabricated using numerically controlled fabrication equipment resulting in parts being built to tightly controlled tolerances. Steel parts are powder coated to form a protective coating. Switchgear compartments are bolted together to form a extended line up. The buswork is provided with fluidized bed epoxy insulated copper. Bus bar is supported by high quality insulators. All bus joints are covered by PVC boots. Switchgear is tested to the requirements of ANSI C37.20. Additional testing includes secondary current injection, protective relay testing, DC logic and breaker trip and close testing.