GE Type QL transformers meet NEMA TP-1 efficiency standards. They are available with aluminum or copper windings and utilize a UL recognized 220 degree centrigrade insulation system.-Quiet Performance-Core and coil assemblies are mounted on rubber isolation pads to reduce noise-Bolted coil terminations-Single-piece front/back is easily removable for service-NEMA 2 drip-proof enclosure is standard weathershield kits are available for conversion to NEMA 3R outdoor configuration-Qualified to the seismic requirements of IEEE-693-2005 and IBC-2006-Copper or aluminum windings-Copper ground strap-Robust packaging with top and side protection protects against shipping damage-Accessible mounting flanges with front/back slotted mounting holes make installation easier-100 percentage factory tested for shorts and coil integrity, current and loss, voltage, impedance and noise.-Clear, comprehensive documentation and labeling 83B2671