The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 02, 2003
Filed:
Nov. 27, 2001
Paul A. Drake, Virginia Beach, VA (US);
Other;
Abstract
The present invention is a phase loss protector for a three phase motor supplied by a three phase power source. A three phase motor has three main power legs, L , L and L , going in. Two of the three legs power the stepdown transformer that supplies a controller. The controller ensures power does not reach the three phase motor when L is not operating. If L loses power, a controller relay will not supply power to a power coil that supplies generally open contact points, shutting down power to the three phase motor. If L loses power, the transformer will not provide power for the controller to operate. If L loses power, the transformer will not provide power to the controller and the controller relay will not supply power to the power coil, again shutting down power to the three phase motor.