Switchyard Clause Samples

Switchyard. The CONTRACTOR shall carry out switchyard installation as required as per approved plan and elevation drawings of switchyard showing bus bar configurations, sizes, tensions, insulator details, etc. All equipment including connectors (unless otherwise specified) will be supplied by the VENDOR. The CONTRACTOR shall install complete set of bus bars and all bays‘ conductors, complete with tension with tension suspension insulator strings, bus-post insulators, equipment connections, bus bar connections to equipment, lightning shield wires including down comers up to a height of 1000 mm. From ground level where they shall be connected to the Employer‘s test links. Installation work of breakers and isolators shall include adjustment/ alignments necessary for proper operation of circuit breakers, isolators and their operating mechanisms. All insulators and bushings shall be protected against damage during installation. Insulators and bushings damaged due to negligence or carelessness of the CONTRACTOR shall not be in any way accepted and shall be replaced by him at his expense. General requirements of Installation of Cabling: i) The supplier shall install, test and commission the cables. Cables shall be laid on cable trays and supports, in conduits and ducts or bare on walls, ceiling, etc. as required. The supplier‘s scope of work includes laying, fixing, jointing, bending and terminating cables. The supplier shall also supply necessary materials and equipment required for jointing and terminating of cables. The supplier shall prepare detailed layout drawing for cable trenches, cable tray layouts for approval by Employer and construct cable routes strictly according to the drawings. ii) Sharp bending, twisting and kinking of cables shall be avoided. The bending radius for various types of cables shall not be less than those specified by cable manufacturer. iii) In each cable run, some extra length shall be kept at a suitable point to enable one or two straight through joints to be made should the cable develop fault at a later date. iv) Cable joints in the middle of the run for control cables will not be a accepted. v) All cable terminations shall be made in a neat. Workmanlike manner. Terminations shall be made for each type of wire or cable in accordance with instructions issued by cable manufacturers and the Employer. vi) Metal sheath and Armour of the cable shall be bounded to the earthing system of the sub-station.

Switchyard. The design of the switchyard, including equipment, structures, protective relaying, etc., shall be in accordance with the facility requirements and PG&E’s design standards, particularly in regard to layout and spacing of equipment, structures, and conductors. The configuration of the switchyard shall be designed to support routine maintenance activities such as main bank insulator washes and switchyard work. The switchyard shall include all electrical equipment and supporting structures necessary for interconnection into the California ISO system with no single contingency failure of the plant interconnection facilities or the transmission system resulting in a total plant outage. Major requirements for the switchyard are discussed in the following sections.