Patent ID: 8084903

Claim:
A connection arrangement for supplying electrical power from a source of alternating-current power to the windings of an electric motor comprising: (a) a source of three-phase alternating-current power including three power supply lines (L 1 , L 2 , L 3 ) and a neutral line (PE); (b) an electric motor including: (1) a generally tubular motor housing ( 2 ); (2) a plurality of motor windings (U, V, W) mounted within said motor housing, each of said motor windings having first (U 1 , V 1 , W 1 ) and second (U 2 , V 2 , W 2 ) ends; and (3) a hollow generally rectangular outer frame ( 4 ) mounted on the outer surface of said housing, said outer frame including side wall means defining a first chamber ( 60 ); (c) a main receptacle ( 7 ) having side wall means defining a second chamber ( 64 ), said side wall means having an external surface; (d) a first auxiliary housing ( 11 ) connected with said main receptacle external surface, said main receptacle and said first auxiliary receptacle being mounted in said outer frame first chamber; (e) first winding connecting means ( 19 ; 30 ) arranged in said main receptacle second chamber for connecting said motor windings with said power source to produce a delta mode of motor operation; and (f) second winding connecting means ( 26 ) at least partially arranged in said first auxiliary receptacle for connecting said motor windings with said power supply lines and said neutral line to produce a star mode of operation.