Aluminum winding|Meets latest U.S. DOE 10 CFR part 431 efficiency standards|Manufactured from quality non-aging, cold rolled, silicon steel laminations using state-of-the-art equipment|Cores are precision cut to close tolerances which eliminates burrs and improves performance|Core is coated to prevent the ingress of moisture|Precision wound with copper or aluminum conductors that are electrically balanced to minimize axial forces during short circuit conditions|Robust interface between core and coils for better short circuit performance|Standard 150 deg C temperature rise and 220 deg C insulation class|ANSI 61 gray, UL50 enclosure finish|Front accessible separate high and low voltage terminals, connectors suitable for aluminum and copper are provided for easy cable installation|Side knockouts standard on all units bottom entry provision conduit entry|Typically 3.5% to 6.5% impedance|Generation 3 current design|Delta primary, wye-N secondary phase|40 deg C maximum temperature|ST-20 standards sound level|SCD 19 standard primary taps|DH1 case style

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