Predicted ultimate capacity, uplift Safety factor of 2.0 over maximum factored loads * Note: Load Factors for the NESC Combined Ice and Wind District Loading (e.g., NESC Heavy) shall be applied in lieu of the Load Factors in this table. Overhead Power Line Structure Foundation Design Information presented in this Section 6.11 shall apply to both Interconnection Line structure foundations and Collection System Circuit overhead structure foundations, as applicable, and unless explicitly stated otherwise. Structure foundations shall be surveyed and staked prior to excavation. Reinforced concrete support structure foundations and equipment pads shall be designed, and constructed in accordance with the provisions of ACI 318, ASTM A615, and allowable soil bearing pressures resulting from site soil sampling, laboratory testing, and geotechnical analysis and recommendations. Reinforced concrete, drilled piers utilizing stub angles (lattice tower structures) or anchor bolts (tubular steel pole structures) to attach the structure to the foundation are the preferred foundation types. Compression/uplift type foundations be straight piers and shall not be belled on the bottom. The parameters shown in Table 3 shall be used to design stub angle (compression/uplift loaded pier) type foundations. For stub angle type foundations, a minimum of four (4) inches of clear space is required from the outermost reinforcing steel to the side of the excavation. For anchor bolt type foundations, a minimum of six (6) inches of clear space is required from the outermost reinforcing steel to the side of the excavation. The anchor bolt embedment length shall be not less than the development length for the strength of concrete specified. Overhead Power Line Structure Design Information presented in this Section 6.12 apply to both Interconnection Line structures and Collection System Circuit overhead structures, as applicable, and unless explicitly stated otherwise. Overhead power line structures shall be wood, monopole type, steel lattice tower type, or a combination thereof. Structural design of all overhead power line structures, including, but not limited to, the tower, conductor cable, OPGW, shield wire, and insulator hardware, shall be in accordance with all applicable loading conditions and sagging/tension limits set forth in the Applicable Standards. Vertical clearances of conductors above ground, all obstacles, and overhead power line components shall be maintained as defined in the Applicable Standards with clearances maintained assuming the maximum final sag (after creep).
Frequency 60 Hz Impulse levels 150 kV (General), 200 kV (Windings) Vector Grounded wye/delta Cooling ONAN Tapping range ±5%, 2.5% steps, manual control finish Munsell Green Guaranteed losses Not used Temperature gauge Required Pressure level indicator Required Pressure relief device Required Oil sampling Required (to be located on the end of the drain valve inside the LV compartment) Filling orifice Required Tank ground tag Required Oil level indicator Required Grounding Solid (MV source, LV winding) Un-grounded delta (MV winding) Pad-mount transformers shall be fitted with in-line, medium-voltage rated, current-limiting fuse protection per phase utilizing suitably-rated, oil-immersed, current-limiting fuses. The selection of these fuses shall be such as to ensure: Compliance with the requirements of IEC 60787, or ANSI/IEEE equivalent. Short circuit protection of the MV transformer winding. That degradation of the fuses does not occur as a result of the flow of repeated transformer magnetizing in-rush currents. Ease of replacement following an in-service operation. Enclosure: The pad-mount transformer shall include a fully-enclosed, transformer mounted, MV and LV termination, steel cabinet, suitable for outdoor installation, as per ANSI C57.12.28. The cabinet must be so designed as to fully enclose all cable tails, cable terminations, grounding tags and transformer fittings within a tamper and rodent resistant, secure enclosure. The cabinet extend to floor level, fully shrouding all cable tails, having the facility for being directly bolted to the supporting concrete plinth. The cabinet depth shall be 24 inches.
Copies of testing certificates and calibration records for all tooling shall be maintained at the Project Site and available for review by Owner. Testing and Quality Control All testing described herein shall be performed by an independent, experienced third party. Contractor shall notify Owner of all testing schedules at least 30 days in advance of testing activities. All Wind Turbine electrical wiring shall be tested to demonstrate it meets stated design criteria and is fit for purpose. Wind Turbine testing shall include the following, at a minimum: All testing specified in the Applicable Standards, including NETA. All testing reasonably recommended or required by the applicable equipment suppliers. Structural works testing for grout properties, in accordance with Section 6.0 (Structural Works Specifications) herein. All exposed cable sections shall be visually inspected for physical damage or manufacturing defects. Such inspections shall be performed prior to and during installation. Megger test of all 34.5-kV Wind Turbine cables. Final continuity tests after completion of all system connections. Acceptable continuity tests shall include a Megger test or VLF test at 100 percent of rated voltage. General Provisions References to “meteorological towers” herein shall be understood to include both permanent and temporary meteorological towers, unless explicitly stated otherwise. Meteorological towers shall be sized and constructed appropriately to allow instrumentation to be placed at Wind Turbine hub height. A side-by-side (i.e., goalpost) anemometer orientation, as shown in IEC 61400-12-1, shall be utilized; such side-by-side anemometers will be mounted at Wind Turbine hub height on each permanent meteorological tower. Similarly, any height provided by a foundation for the temporary meteorological tower shall be taken into consideration relative to the final constructed hub height of the Wind Turbine. Meteorological towers shall be designed and fabricated to the latest EIA/TIA-222-FS Structural Standards for Steel Antenna Towers and Antenna Supporting Structures and according to other Applicable Standards.