Category: Medium Voltage Substations and Relaying

We designed a 69kV ringbus substation for an industrial plant that consisted of the following equipment and design: Two (2) 20MVA transformers, vertical break air switches with ground operators and interlocks, SF6 circuit breakers, aluminum rigid bus structure, structural supports, lightning protection, and grounding grid. The aluminum rigid bus structure was designed according to IEEE …

69kV Industrial Plant Substation Read More »

We provided design of the electromechanical relay replacement 100MW black start diesel plant, including all AC and DC control schematics, and three line diagrams to house the new Beckwith and SEL differential relays. The existing differential relay replaced proved to be particularly challenging. We specified and procured the relays, FT-1s, and other components. The project …

100MW Turbine Relay Replacement Read More »

We were contracted to perform engineering, testing, and commissioning of a power station’s outdoor 66kV switchyard. There were two (2) separate scopes to this work. The first part consisted of the addition of a new switchyard for the combustion turbine generator repowering of the plant. The second part consisted of modifications to the existing switchyard …

132MW Natural Gas Generation Project Read More »