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1. WO2020065646 - DETECTION AND PROTECTION OF POWER PHASE LOSS AND NEUTRAL FAILURE

Publication Number WO/2020/065646
Publication Date 02.04.2020
International Application No. PCT/IL2019/051052
International Filing Date 24.09.2019
IPC
H02H 3/16 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
16responsive to fault current to earth, frame or mass
H02H 3/253 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
24responsive to undervoltage or no-voltage
253for multiphase applications, e.g. phase interruption
H02H 3/33 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
26responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
32involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
33using summation current transformers
H02H 3/34 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
26responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
32involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
34of a three-phase system
CPC
G01R 31/54
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
31Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
50Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
54Testing for continuity
H02H 3/14
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
14responsive to occurrence of voltage on parts normally at earth potential
H02H 3/253
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
24responsive to undervoltage or no-voltage
253for multiphase applications, e.g. phase interruption
H02H 5/105
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
5Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
10responsive to mechanical injury, e.g. rupture of line, breakage of earth connection
105responsive to deterioration or interruption of earth connection
Applicants
  • PHASOR LTD [IL]/[IL]
Inventors
  • TAMIR, Oren
Agents
  • AZR, Yoram
  • ZER, Yoram
Priority Data
62/735,36224.09.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) DETECTION AND PROTECTION OF POWER PHASE LOSS AND NEUTRAL FAILURE
(FR) DÉTECTION ET PROTECTION DE PERTE DE PHASE D'ALIMENTATION ÉLECTRIQUE ET DE DÉFAILLANCE NEUTRE
Abstract
(EN)
A protection circuit provides a control voltage to a 3 -phase contactor, where the three phases of the 3 -phase power supply are inputs to the 3 -phase contactor. The protection circuit includes: four input terminals, configured to be connected respectively to the three phases and to the neutral line of the 3 -phase power supply; an output terminal, providing the control voltage to a control line of the 3 -phase contactor; and control circuitry configured to provide the control voltage when any one or more of the three phases are live and when the neutral line is connected, and to provide no control voltage when all three phases are disconnected or when the neutral line is disconnected.
(FR)
La présente invention concerne un circuit de protection qui fournit une tension de commande à un contacteur triphasé, les trois phases de l'alimentation électrique triphasée étant appliquées au contacteur triphasé. Le circuit de protection comprend : quatre bornes d'entrée, configurées pour être connectées respectivement aux trois phases et à la ligne neutre de l'alimentation électrique triphasée ; une borne de sortie, fournissant la tension de commande à une ligne de commande du contacteur triphasé ; et des circuits de commande configurés pour fournir la tension de commande lorsqu'une ou plusieurs des trois phases sont sous tension et lorsque la ligne neutre est connectée, et pour ne fournir aucune tension de commande lorsque les trois phases sont déconnectées ou lorsque la ligne neutre est déconnectée.
Latest bibliographic data on file with the International Bureau