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1. WO2020064926 - AFCI SELF TEST

Publication Number WO/2020/064926
Publication Date 02.04.2020
International Application No. PCT/EP2019/076028
International Filing Date 26.09.2019
IPC
G01R 31/02 2006.01
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
02Testing of electric apparatus, lines, or components for short-circuits, discontinuities, leakage, or incorrect line connection
H02H 1/00 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
1Details of emergency protective circuit arrangements
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
CPC
G01R 31/52
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
52Testing for short-circuits, leakage current or ground faults
H02H 1/0015
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
1Details of emergency protective circuit arrangements
0007concerning the detecting means
0015Using arc detectors
H02H 3/33
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
Applicants
  • FRONIUS INTERNATIONAL GMBH [AT]/[AT]
Inventors
  • HOFER, Bernd
  • BREUER, Stefan
  • FASTHUBER, Christian
  • SPITZER, Walter
  • HOFER, Andreas
Agents
  • PATENTANWÄLTE PINTER & WEISS OG
Priority Data
18197525.128.09.2018EP
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) AFCI SELBSTTEST
(EN) AFCI SELF TEST
(FR) TEST AUTOMATIQUE D’AFCI
Abstract
(DE)
Um einen Fehler (F) in einer Anordnung, umfassend einen Transformator (4), welcher eine in Serie zu einer Gleichspannungsleitung (DC+, DC-) geschaltete Primärwicklung (L1) und eine mit der Primärwicklung (L1) magnetisch gekoppelte Sekundärwicklung (L2) aufweist, und umfassend eine Auswerteeinheit (5), welche ein Sekundärsignal (i2) auf der Sekundärwicklung (L2) verarbeitet, zu erkennen wird erfindungsgemäß aus dem Sekundärsignal (i2) ein Signalanteil (n(fn)) bei zumindesteiner Frequenz (fn) ermittelt und ein Signalpegel (P(fn)) des Signalanteils (n(fn)) mit einer Signalschwelle (P_min(fn)) verglichen. Der der Fehler (F) wird detektiert, wenn der Signalpegel (P(fn)) die Signalschwelle (P_min(fn)) unterschreitet.
(EN)
In order to detect a fault (F) in an arrangement comprising a transformer (4) that has a primary winding (L1) connected in series with a DC voltage line (DC+, DC-) and a secondary winding (L2) coupled magnetically to the primary winding (L1), and comprising an evaluation unit (5) that processes a secondary signal (i2) on the secondary winding (L2), according to the invention, a signal component (n(fn)) at at least one frequency (fn) is determined from the secondary signal (i2) and a signal level (P(fn)) of the signal component (n(fn)) is compared with a signal threshold (P_min(fn)). The fault (F) is detected when the signal level (P(fn)) falls below the signal threshold (P_min(fn)).
(FR)
L'invention vise à détecter une erreur (F) dans un ensemble comprenant un transformateur (4) qui comporte un enroulement primaire (L1) monté en série par rapport à une ligne de tension continue (DC+, DC-), et un enroulement secondaire (L2) couplé magnétiquement à l'enroulement primaire (L1), et comprenant une unité d'évaluation (5) qui traite un signal secondaire (i2) sur l'enroulement secondaire (L2). A cet effet, une composante de signal (n(fn)) est déterminée à partir du signal secondaire (i2) à au moins une fréquence (fn) et un niveau de signal (P(fn)) de la composante de signal (n(fn)) est comparé à un seuil de signal (P_min(fn)). L’erreur (F) est détectée lorsque le niveau de signal (P(fn)) est inférieur au seuil de signal (P_min(fn)).
Also published as
Latest bibliographic data on file with the International Bureau