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1. WO2016153889 - ELECTRONIC TRIP UNITS POWERED BY CURRENT TRANSFORMERS AND CIRCUIT BREAKERS COMPRISING THE SAME

Publication Number WO/2016/153889
Publication Date 29.09.2016
International Application No. PCT/US2016/022749
International Filing Date 17.03.2016
IPC
H01H 71/12 2006.01
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
H01H 83/20 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
83Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
20operated by excess current as well as by some other abnormal electrical condition
H02H 3/08 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
3Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection
08responsive to excess current
H02H 1/00 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
1Details of emergency protective circuit arrangements
H01H 11/00 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
11Apparatus or processes specially adapted for the manufacture of electric switches
H02H 1/04 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
1Details of emergency protective circuit arrangements
04Arrangements for preventing response to transient abnormal conditions, e.g. to lightning
CPC
H01H 2011/0068
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
11Apparatus or processes specially adapted for manufacture of electric switches
0062Testing or measuring non-electrical properties of switches, e.g. contact velocity
0068measuring the temperature of the switch or parts thereof
H01H 37/32
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
37Thermally-actuated switches
02Details
32Thermally-sensitive members
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 71/125
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
125characterised by sensing elements, e.g. current transformers
H01H 83/20
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
83Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
20operated by excess current as well as by some other abnormal electrical condition
H01H 9/54
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
9Details of switching devices, not covered by groups H01H1/00 - H01H7/00
54Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
Applicants
  • EATON CORPORATION [US]/[US]
Inventors
  • ZHENG, Gerald
  • ZHOU, Xin
  • LAGREE, James Leo
  • MILLER, Theodore James
  • WU, Bruce
  • OUYANG, Sui
Agents
  • MYERS BIGEL & SIBLEY, PA
Priority Data
14/663,89020.03.2015US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ELECTRONIC TRIP UNITS POWERED BY CURRENT TRANSFORMERS AND CIRCUIT BREAKERS COMPRISING THE SAME
(FR) UNITÉS DE DÉCLENCHEMENT ÉLECTRIQUES ALIMENTÉES PAR DES TRANSFORMATEURS DE COURANT ET DISJONCTEURS COMPRENANT CELLES-CI
Abstract
(EN)
A circuit breaker includes a set of separable contacts moveable between a closed position and an open position, an operating mechanism configured to open the set of contacts, a conductor coupled to the set of contacts, a current transformer coupled to the conductor, and a trip circuit coupled to the operating mechanism and to the current transformer and configured to cause the operating mechanism to open the set of contacts when a current through the conductor exceeds a current threshold that is greater than a saturation threshold of the current transformer. The trip circuit is further configured to vary the current threshold during an interval following a closure of the set of the contacts and to provide a fixed current threshold thereafter.
(FR)
Disjoncteur comprenant un ensemble de contacts séparables pouvant se déplacer entre une position fermée et une position ouverte, un mécanisme d'actionnement conçu pour ouvrir l'ensemble de contacts, un conducteur couplé à l'ensemble de contacts, un transformateur de courant couplé au conducteur, et un circuit de déclenchement couplé au mécanisme d'actionnement et au transformateur de courant et conçu pour amener le mécanisme d'actionnement à ouvrir l'ensemble de contacts lorsqu'un courant à travers le conducteur dépasse un seuil de courant qui est supérieur à un seuil de saturation du transformateur de courant. Le circuit de déclenchement est en outre conçu pour faire varier le seuil de courant pendant un intervalle après la fermeture de l'ensemble des contacts et pour fournir un seuil de courant fixe par la suite.
Also published as
Latest bibliographic data on file with the International Bureau