Current transformer assembly for dynamoelectric machines

A current transformer and a dynamoelectric machine housing assembly comprising:

• a current transformer;
• a portion of the housing configured with an aperture;
• a screw having a head at one end, extending through said aperture and threadably engaged with said current transformer;
• a first insulating element configured with an aperture for receiving the shaft of said screw and an upper portion interposed between said screw head and the lower portion of said aperture;
• and
• a cap secured within said aperture covering said screw head.

A current transformer and a dynamoelectric machine housing assembly comprising:

• a generally spool-shaped coil support structure having upper and lower flanges;
• a transformer coil secured within said flanges;
• an aperture configured within said machine housing;
• a magnetic flux shield secured to said lower flange of said coil support structure;
• a screw having a head at one end, extending through said aperture and threadably engaged with said flux shield, effective to secure the upper flange of said coil support structure to the interior of the machine housing;
• a first insulating element interposed between said upper flange and an inner surface of the housing
• a collar-shaped insulating element interposed between the head of said screw and the housing;
• a cap composed of, at least in part, insulating material secured within said aperture effective to cover and electrically insulate said screw from contacts from without the machine housing;
• and
• a sealing element cooperating with said cap and said housing to provide a fluid-tight seal around said cap.