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Transformers - Sola/Hevi-Duty Sales

6 Transformers 210 Visit our website at www.solahd.com or contact Technical Services at (800) 377-4384 with any questions. General Single and three phase distribution transformers (600 Volt

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Text of Transformers - Sola/Hevi-Duty Sales

Transformers6210Visit our website at or contact Technical Services at (800) 377-4384 with any and three phase distribution transformers (600 Volt and below) Provide and install, as ref er enced on the electrical plans, enclosed dry type transformers as man u fac tured by SolaHD or approved Transformers must be listed by Un der writ ers Laboratory, evaluated to CSA standards and designed, constructed and rated in accordance with NEMA ST 20 and applicable IEEE & OSHA spec i fi ca tions. Certain units are compliant with the TP-1 standards enacted by the Energy Policy Act of 2005. ConstructionCores All trans form er cores shall be constructed of low loss, high quality, elec tri cal grade laminate steel. By design, the fl ux density is to be kept well below the saturation level to reduce audible sound level and min i mize core losses. The core volume shall allow operation at 10%above rated primary voltage at no load without exceeding the tem per a ture rise of the Coil con duc tors shall be either alu mi num or copper andmust be con tin u ous. The entire core and coil assemblyshall be im preg nat ed with a thermal setting varnish andcured to reduce hot spots in the coils and seal out moisture. Coils with exposed magnet wire will not be acceptable. Trans form ers shall have common core construction. All trans form ers 1 kVA or larger shall in cor po rate a faraday (electrostatic) shield between primary and secondary windings for the at ten u a tion of voltage spikes, line noise and voltage transients. General purpose transformers are classifi ed as isolation Shield For power conditioning purposes, it is recommended that isolation transformers be equipped with electrostatic shielding between the primary and secondary windings. An electrostatic shield provides a conducting path to ground that reduces the effect of coupling between primary and secondary windings and improves the isolation transformer s ability to isolate its' load from the common-mode noise present on the input power source. Electrostatic shields signifi cantly reduce or eliminate electrical disturbances on the line from being transmitted to the sensitive Transformer enclosures shall be constructed of heavygauge sheet steel and coated with a grey powder paint fi nish (ANSI 61). Enclosures shall be UL/NEMA Type 1/3R rated for outdoor use. This information must be listed on the transformer name plate. Maximum transformer enclosure temperature will not exceed 65 C rise above a 40 C ambient under full load. The trans form er enclosure must be grounded by the installer in ac cor dance with the latest edition of the National Electric Code and any local codes or Audible sound levels will not exceed limits es tab lished in NEMA ST20: Less than 10 kVA 40 db10 to 50 kVA 45 db 51 to 150 kVA 50 db151 to 300 kVA 55 db 301 to 500 kVA 60 db Transformers shall incorporate a UL recognized insulation Transformers are warranted against material, performance and work man ship defects for a period of ten (10) years from date of manufacture with the provision for an additional two (2) years. Custom transformers come with a 1-year Guide for Low Voltage, General Purpose, Dry Type Transformers (600 Volt Class) - .05 kVA to 500 kVANotes6211Visit our website at or contact Technical Services at (800) 377-4384 with any ques Typical performance and di men sion al data on similar units must be submitted on all trans form ers for approval. Factory testing must have been conducted in accordance with NEMA ST20. Submitted per for mance and dimensional data must include, but is not limited to the following: A. Height, width, depth, mounting di men sions, conduit entry locations and lifting provisionsB. Weight C. Transformer lossesD. Potential tests both applied and inducedE. Temperature - ambient and rise under full loadF. Insulation classG. % ex ci ta tion currentH. Electrical schematic including tapsI. Polarity and phase rotationJ. kVA, fre quen cy and voltage ratingK. IR, IX, and IZ percentages at reference temperatureL. Audible sound level

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