Siemens Energy & Automation, Inc.

Ronald W McKinney

William E May

James S Wells

A current transformer is provided for the electronic trip unit of a molded case circuit breaker. The current transformer has a core with a winding encoiled about the core and a bus spiraled about the core. The spiral bus establishes a current path from one end of the bus to the other which will conduct current through the core in a spiral fashion. The spiral bus design effectively rotates the bus 90 degrees achieving a narrow transformer design which fits into the electronic trip unit without increasing the width of the trip unit.

Growing community of inventors

Grayson, GA, United States of America

Ronald W McKinney