UG-WGC57.12.23 - Underground TR & NW Protect - UG Self-Cont 1-0 Working Group

This standard covers certain electrical, dimensional, and mechanical characteristics and takes into consideration certain safety features of single-phase, 60 Hz, mineral-oil-immersed, self-cooled, underground distribution transformers with separable insulated high-voltage connectors. These transformers are generally used for step-down purposes from an underground primary cable supply and are suitable for occasional submerged operation. This standard is intended for use as a basis for determining performance, interchangeability, and safety of the equipment covered, and to assist in the proper selection of such equipment.