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1. EP2181457 - ELECTRICAL SWITCHING APPARATUS, CIRCUIT INTERRUPTER AND METHOD OF INTERRUPTING OVERCURRENTS OF A POWER CIRCUIT

Office
European Patent Office
Application Number 08788915
Application Date 23.07.2008
Publication Number 2181457
Publication Date 05.05.2010
Publication Kind B1
IPC
H01H 71/40
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
71Details of the protective switches or relays covered by groups H01H73/-H01H83/115
10Operating or release mechanisms
12Automatic release mechanisms with or without manual release
40Combined electrothermal and electromagnetic mechanisms
CPC
H01H 71/40
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
71Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
10Operating or release mechanisms
12Automatic release mechanisms with or without manual release
40Combined electrothermal and electromagnetic mechanisms
H01H 71/04
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
71Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
04Means for indicating condition of the switching device
H01H 71/123
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
71Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
10Operating or release mechanisms
12Automatic release mechanisms with or without manual release
123using a solid-state trip unit
H01H 71/58
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
71Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
10Operating or release mechanisms
50Manual reset mechanisms ; which may be also used for manual release
58actuated by push-button, pull-knob, or slide
H01H 2071/124
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
71Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
10Operating or release mechanisms
12Automatic release mechanisms with or without manual release
123using a solid-state trip unit
124with a hybrid structure, the solid state trip device being combined with a thermal or a electromagnetic trip
Applicants EATON CORP
Inventors MILLS PATRICK W
GONYEA KEVIN D
BENSHOFF RICHARD G
MCCORMICK JAMES M
Designated States
Priority Data 11782142 24.07.2007 US
Title
(DE) ELEKTRISCHE SCHALTVORRICHTUNG, UNTERBRECHERSCHALTER UND VERFAHREN ZUM UNTERBRECHEN VON ÜBERSTRÖMEN EINER LEISTUNGSSCHALTUNG
(EN) ELECTRICAL SWITCHING APPARATUS, CIRCUIT INTERRUPTER AND METHOD OF INTERRUPTING OVERCURRENTS OF A POWER CIRCUIT
(FR) APPAREIL DE COMMUTATION ÉLECTRIQUE, INTERRUPTEUR DE CIRCUIT ET PROCÉDÉ D'INTERRUPTION DE SURINTENSITÉS D'UN CIRCUIT DE PUISSANCE
Abstract
(EN)
A circuit interrupter (1) includes a housing (112), separable contacts (170,172), and an operating mechanism (19) including a latch (20). The operating mechanism opens the contacts responsive to actuation of the latch. A trip mechanism (27) cooperates with the latch to trip open the contacts. The trip mechanism includes a thermal overload mechanism (184,190) actuating the latch responsive to a thermal fault caused by current flowing through the contacts, a solenoid (98) cooperating with the thermal overload mechanism to actuate the latch responsive to the electromagnetic device being energized, and a processor (55) repetitively determining (202) a value of the current flowing through the contacts, determining (204,208) if the value exceeds a predetermined value (K1) for a number of occurrences, and responsively energizing (208,210) the solenoid, in order to actuate the latch contemporaneous with actuation of the latch by the thermal overload mechanism, in order to decrease the time to trip open the contacts

(FR)
Un interrupteur de circuit (1) comprend un boîtier (112), des contacts séparables (170, 172) et un mécanisme de fonctionnement (19) comprenant un verrou (20). Le mécanisme de fonctionnement ouvre les contacts en réponse à un actionnement du verrou. Un mécanisme de déclenchement (27) coopère avec le verrou pour déclencher l'ouverture des contacts. Le mécanisme de déclenchement comprend un mécanisme de surcharge thermique (184, 190) actionnant le verrou en réponse à un défaut thermique causé par un courant s'écoulant à travers les contacts, un solénoïde (98) coopérant avec le mécanisme de surcharge thermique pour actionner le verrou en réponse au dispositif électromagnétique étant mis sous tension, et un processeur (55) détermine de manière répétitive (202) une valeur du courant s'écoulant à travers les contacts, détermine (204, 208) si la valeur excède une valeur prédéterminée (K1) pour un certain nombre d'occurrences et, en réponse, alimente (208, 210) le solénoïde afin d'actionner le verrou en même temps que l'actionnement du verrou par le mécanisme de surcharge thermique afin de diminuer le temps pour déclencher l'ouverture des contacts.