초록 ▼

An earth cooled distribution transformer system and a method of cooling same and distributing electrical power to a plurality of consumer loads (31) is described. A distribution transformer (10 is provided with the primary (16) and secondary (17) windings encapsulated in a solid insulating material.

An earth cooled distribution transformer system and a method of cooling same and distributing electrical power to a plurality of consumer loads (31) is described. A distribution transformer (10 is provided with the primary (16) and secondary (17) windings encapsulated in a solid insulating material. The steel magnetic core (13) remains exposed and the transformer is buried in ground at a predetermined depth with the core (13) exposed whereby heat generated by the windings is dissipated into the earth through the exposed magnetic core. The high voltage supply cable (20) may be a buried cable or is at least partly buried as well as the power distribution cable (21), which feeds power to one or more consumer loads. The power distribution transformer (10) may be buried adjacent a manhole enclosure (12) with the primary and secondary winding power cables being connected to terminals (22-25) accessible in the manhole. A series of power distribution transformers (10) and supply cables (20) as well as feed cables (12) may be buried in ground in a network to feed an entire residential area without the need to provide insulating casings or even manhole enclosures.

대표청구항 ▼

[ We claim:] [1.] An earth cooled distribution transformer system comprising a distribution transformer having a steel magnetic core defining core legs about which primary and secondary windings are respectively wound, each said winding being insulated by a solid insulating material, said distributi

[ We claim:] [1.] An earth cooled distribution transformer system comprising a distribution transformer having a steel magnetic core defining core legs about which primary and secondary windings are respectively wound, each said winding being insulated by a solid insulating material, said distribution transformer being buried at a predetermined depth in ground with said steel core exposed to said ground whereby to dissipate heat in said ground generated by said windings, a high voltage supply cable connected to said primary winding and extending at least partly in said ground and a power distribution cable connected to said secondary winding and extending at least partly in said ground to feed power to one or more consumer loads.