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1. WO2013054052 - METHOD AND DEVICE FOR DETECTING AN INSULATION DEFECT IN A LOW-VOLTAGE ELECTRICAL NETWORK

Publication Number WO/2013/054052
Publication Date 18.04.2013
International Application No. PCT/FR2012/052317
International Filing Date 11.10.2012
IPC
G01R 31/12 2006.1
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
12Testing dielectric strength or breakdown voltage
CPC
G01R 31/1263
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
12Testing dielectric strength or breakdown voltage ; ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
1227of components, parts or materials
1263of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
G01R 31/1272
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
12Testing dielectric strength or breakdown voltage ; ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
1227of components, parts or materials
1263of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
1272of cable, line or wire insulation, e.g. using partial discharge measurements
Applicants
  • GAETA, Michel [FR]/[FR]
  • ROQUELAURE, Jean-Marc [FR]/[FR]
Inventors
  • GAETA, Michel
  • ROQUELAURE, Jean-Marc
Agents
  • MARCHAND, André
Priority Data
11 5923512.10.2011FR
Publication Language French (fr)
Filing Language French (FR)
Designated States
Title
(EN) METHOD AND DEVICE FOR DETECTING AN INSULATION DEFECT IN A LOW-VOLTAGE ELECTRICAL NETWORK
(FR) PROCÉDÉ ET DISPOSITIF DE DÉTECTION D'UN DÉFAUT D'ISOLEMENT DANS UN RÉSEAU ÉLECTRIQUE BASSE TENSION
Abstract
(EN) The invention relates to a device (DTC) for detecting, in an electrical network conveying a low-voltage AC voltage (Vac), a defect of insulation between a phase wire (P) and a neutral wire (N) manifested by the appearance of partial-discharge signals (PDS). The device comprises means (ZCCT, MC) for associating with each partial-discharge signal detected, a parameter indicative of the position of the signal on the curve of the AC voltage (Vac), then searching for whether there exists, between several partial-discharge signals detected during different cycles of variation of AC voltage, at least one correlation indicative of an insulation defect. Application in particular to fire prevention.
(FR) L'invention concerne un dispositif (DTC) de détection, dans un réseau électrique véhiculant une tension alternative basse tension (Vac), d'un défaut d'isolement entre un fil de phase (P) et un fil de neutre (N) se traduisant par l'apparition de signaux de décharge partielle (PDS). Le dispositif comprend des moyens (ZCCT, MC) pour associer à chaque signal de décharge partielle détecté, un paramètre indicatif de la position du signal sur la courbe de la tension alternative (Vac), puis rechercher s'il existe, entre plusieurs signaux de décharge partielle détectés pendant des cycles de variation différents de la tension alternative, au moins une corrélation indicative d'un défaut d'isolement. Application notamment à la prévention d'incendie.
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