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:
Mar. 10, 1992
Filed:
Feb. 12, 1990
John M Winter, Cedar Rapids, IA (US);
D Chris Higgins, Cedar Rapids, IA (US);
Square D Company, Palatine, IL (US);
Abstract
An equipment protection device for a multi pole circuit breaker includes a trip coil, having a plunger with a tang, in an adapter housing that is attached to the breaker housing for tripping the breaker load contacts by means of the tang. The tang extends through an aperture in the side of the breaker. The trip coil is controlled by a toroid that is in a remote housing, displaced from the breaker housing and which includes a sensing winding on the magnetic core of the toroid. A ground fault carrying conductor is passed through the toroid window and connects the neutral of the breaker panel to an earth ground. A test button on the adapter housing completes a circuit for supplying current to a test winding on the toroid to simulate a ground fault condition. The trip coil has two independent windings that are individually connected to the load contacts of the breaker such that either winding can operate the trip coil.