Pole-Type Single Phase Outdoor Distribution Transformers: This specification covers outdoor service, single phase, dielectric mineral
oil filled, natural convection cooled, pole-type, distribution transformers.
Transformers shall be operated on the following 60 Hertz systems.
2,400 Volt, Delta, three phase, three wire
2,400/4,160 Volt grounded wye, three phase, four wire
13,800 Volt, Delta three phase, three wire
13,800/23,900 Volt grounded wye, three phase, four wire
Transformers shall be 500 kVA or smaller, with or without taps and have
secondary voltages of 120/240; 240/480; 277; 2,400/4,160Wye or