This guide deals with the distribution transformer construction (core, windings, cooling, tank & cover, conservator, pressure relief device, Buchholz relay, silica gel breather, winding temperature indicator, etc. ), transport & packing & despatch, installation. Designing a transformer foundation involves considering the transformer's size, weight, dynamic forces, and environmental conditions to ensure safety and stability. Understand the Design Requirements. 1. 1 Pre-installation Requirements for Transformers and Substations: - The indoor ceiling and wall finishes should be completed with no water leakage. - The foundation should be inspected and accepted as qualified, and the conduits embedded in the. This series of courses are based on the “Design Guide for Rural Substations”, published by the Rural Utilities Service of the United States Department of Agriculture, RUS Bulletin 1724E-300, June 2001. This course is one of a series of thirteen courses on the design of electrical substations. The. substations with installed power limited to 2000 kVA or two 1000 kVA MV/LV transformers. These boxes are commonly seen as green metal units on a concrete pad in neighborhoods with underground.