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Machine translation
1. (WO1980000050) METHOD AND APPARATUS FOR DETECTING FAULTS IN AN ELECTRIC POWER DISTRIBUTION SYSTEM
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1980/000050    International Application No.:    PCT/US1979/000223
Publication Date: 10.01.1980 International Filing Date: 09.04.1979
IPC:
H02H 3/52 (2006.01)
Applicants:
Inventors:
Priority Data:
912663 05.06.1978 US
Title (EN) METHOD AND APPARATUS FOR DETECTING FAULTS IN AN ELECTRIC POWER DISTRIBUTION SYSTEM
(FR) METHODE ET APPAREIL DE DETECTION DE DEFAILLANCE DANS UN SYSTEME ELECTRIQUE DE DISTRIBUTION DE PUISSANCE
Abstract: front page image
(EN)Open conductors (18) in an electric power distribution system (10) are detected by sensing the abrupt change in balance of transformer magnetizing current among phases, particularly the third harmonic of the power system frequency. The current is sensed in each phase (34, 36, 38) and the absolute magnitude of the third harmonic current is compared (46) among the phases. When imbalance exceeds a predetermined value, a signal (54) is produced.
(FR)Des conducteurs ouverts (18) dans un systeme electrique de distribution de puissance (10) sont detectes en captant le changement brusque d"equilibre du courant de magnetisation du transformateur entre les phases, en particulier la troisieme harmonique de la frequence du systeme de puissance. Le courant est capte dans chaque phase (34, 36, 38) et l"amplitude de la troisieme harmonique est comparee (46) entre les phases. Lorsque le desequilibre depasse une valeur predeterminee, un signal (54) est produit.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)