Bridgeport Magnetics Group has introduced a line of dry-type single- and three-phase distribution transformers with a low voltage of less than 600V AC for industrial, healthcare, commercial buildings, shopping malls, schools, theaters, churches and libraries. The three-phase distribution transformers include input and output voltages of 480V AC delta - 208 or 120V, 240 or 120V at 60Hz or 1:1 ratios and primary taps are optional. Power ratings range from 5 to 37.5kVA single phase and from 15 to 112.5kVA three-phase configuration.
Mounted inside sleek rectangular steel enclosures with epoxy powder coated exterior in green colour. According to the company, the high efficiency of the transformers is representative of toroidal core designs, well exceeding the guidelines of NEMA's Premium Efficiency Transformer Program. Due to low transformer losses, the temperature rise at full load is less than 80°C allowing use of non-ventilated enclosures, claims the company. The inherently quiet operation of the toroidal transformers inside the low profile enclosures are claimed to make the company's distribution transformers suitable for interior baseboard installation. The distribution transformer enclosures can be wall mounted vertically or horizontally.
Inside the enclosure, wire termination is made with screw-type terminal blocks. Stud-type connectors are optional. The enclosures are available with a water tight, hinged, and locking door. The removable connector panel has a water-tight seal.
