Outdoor non-weatherproof unitran enclosed design, providing pre-wiring for easy installation, eliminating the need for a transformer box and primary switch. Secondary circuit ground fault protection, interrupting transformer output to eliminate the danger of a fire in case of an arc to ground. Three automatic resets, eliminates nuisance tripping, provides continuous and better performance, thus saving service costs. A 29-minute by-pass switch, which enables efficient fault detection, in the same manner that you were accustomed to work with the old UL506 transformers. High power factors available, which allows installation of more units on one circuit, saving material and labour costs.