Bus Duct Sample Clauses

Bus Duct. This section covers the design, manufacture and installation of completely coordinated isolated phase bus duct for the gas turbine generator and, if required by Contractor's design, 4.16kV nonsegregated bus duct for station auxiliaries. The bus duct shall be designed, manufactured and tested in accordance with the latest applicable ANSI, IEEE and NEMA standards. The Contractor shall furnish and install the bus duct system complete with all equipment and accessories including, but not limited to, the following: -------------------------------------------------------------------------------- EPC - Exhibit B -------------------- TENASKA GEORGIA GENERATION PROJECT Page 100 of 132 -------------------------------------------------------------------------------- - isolated phase bus duct between the gas turbine generators and main step-up power transformers, - if required by the Contractor's design, the three (3) 4.16kV nonsegregated bus ducts from the auxiliary power transformers to the 4.16kV switchgear, - supporting structures, and - disconnect links. The phase bus conductors shall be either copper or aluminum alloy. The bus enclosures shall be steel or aluminum alloy with manufacturer's standard hardware for indoor sections and stainless steel for outdoor sections. Supporting structures shall be ASTM A36 steel with the outdoor structures being hot-dipped galvanized. Outdoor bus duct section shall be provided with space heaters to maintain an internal duct temperature above the dew point. All bolted connections of the bus conductors shall be silver-plated for copper bus and tin-plated for aluminum. Provide continuous copper bar ground bus the full length of the bus duct and electrically connecting all enclosure sections. If the bus duct is constructed to provide a continuous path for ground current the enclosure may serve as the ground bus. Taps or connections shall be provided, as required, to accommodate auxiliary equipment such as lightning and surge protection, generator controls, metering and relaying, and current and potential transformers. Removable covers shall be provided to permit access to the interior of the enclosure. After fabrication, all metalwork of the enclosures shall be thoroughly cleaned and any steel work shall be phosphorized, or equivalent, and shall be painted with xxxx ANSI 61, or equivalent, paint. Design and production tests shall be per ANSI requirements.
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