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:
Dec. 12, 2006
Filed:
Dec. 18, 2003
Mark A. Faulkner, Greenwood, SC (US);
Ronald T. Zipagan, Greenwood, SC (US);
Mark A. Faulkner, Greenwood, SC (US);
Ronald T. Zipagan, Greenwood, SC (US);
Eaton Corportion, Cleveland, OH (US);
Abstract
A voltage sensing device automatically scales the source and network phase voltages of a power distribution system having one of two operating voltages for input to a network protector relay and also automatically scales a voltage for operating the trip and close circuit of the circuit breaker in the network protector. A latching tap select relay only switches the system voltages to the lower operating voltage input taps of step down transformers after a short delay if all the system voltages are in the lower operating range. A diagnostic circuit verifies proper switch position and voltages before closing output contacts to connect the scaled voltages to the relay and circuit breaker.