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City of Everett 26 22 13 - 3 <br /> Inductive Charging Infrastructure for Everett Transit <br /> D. Shipping Restraints: Paint or otherwise color-code bolts, wedges, blocks, and other <br /> restraints that are to be removed after installation and before energizing. Use <br /> fluorescent colors that are easily identifiable inside transformer enclosure. <br /> 2.3 ISOLATION TRANSFORMER <br /> A. Comply with NFPA 70, and list and label isolation transformer as complying with <br /> UL 1561. <br /> B. Core: Electrical grade, non-aging silicon steel with high permeability and low hysteresis <br /> losses. <br /> 1. One leg per phase. <br /> 2. Core volume must allow efficient transformer operation at 10 percent above <br /> nominal tap voltage. <br /> 3. Grounded to enclosure. <br /> C. Coils: Continuous windings without splices, except for taps. <br /> 1. Coil Material: Copper. <br /> 2. Internal Coil Connections: Brazed or pressure type. <br /> 3. Terminal Connections: Bolted. <br /> D. Taps for the isolation Transformer: Two 2.5 percent taps above and two 2.5 percent <br /> taps below normal full capacity <br /> E. Insulation Class: 220 deg C, UL-component-recognized insulation system with <br /> maximum of 150 deg C rise above 40 deg C ambient temperature. <br /> F. Grounding: Provide ground-bar kit or ground bar installed on inside of transformer <br /> enclosure. <br /> 1. Unit must comply with requirements of DOE 2016 efficiency levels when tested in <br /> accordance with NEMA TP 2 with K-factor equal to one. <br /> G. Low-Sound-Level Requirements: Maximum sound levels when factory tested in <br /> accordance with IEEE C57.12.91, shall be 62 dB (A-weighted). <br /> 2.4 IDENTIFICATION <br /> A. Nameplate: <br /> 1. Engraved, laminated-acrylic or melamine plastic signs for the isolation <br /> transformer, mounted with corrosion-resistant screws. Nameplates and label <br /> products are specified in Section 260553 "Identification for Electrical Systems." <br /> 2.5 SOURCE QUALITY CONTROL <br /> A. Testing Administrant: Engage qualified electrical testing agency to evaluate <br /> transformer. <br /> 26 22 13 - 3 LOW-VOLTAGE DISTRIBUTION TRANSFORMERS <br />