A device (17) for detecting a deterioration state in a suspension member arrangement (9) for an elevator (1) is proposed. The suspension member arrangement (9) comprises at least one suspension member (11) having a first and a second group (24a, 24b) of electrically conductive cords (23) and the method comprises -applying a first and a second alternating voltages (U 1 , U 2 ) having the same waveform and a phase difference of 180°, to a respective first end (25a, 25b) of the first and of the second group (24a, 24b) of cords -determining at least one of a summed voltage U + or a differential voltage U - , respectively correlating to a sum (U 3 + U 4 ) of or a difference (U 3 - U 4 ) between, a third voltage U 3 between a second end (27a) of the first group of cords and a common electrical potential and a fourth voltage U 4 between a second end (27b) of the second group of cords and the common electrical potential - determining the deterioration state based on at least one of the summed voltage U + and the differential voltage U - . Due to the 180° phase shift, the correlated summed and/or differential voltage U + , U - allow detection of deteriorations in a suspension member (11) such as cord breaks, shunts between cords, connections between cords and ground potential and/or deterioration due to corrosion of cords.
ELEVATOR ARRANGEMENT WITH AN ELECTRIC ISOLATION IN AN STM FIXATION ARRANGEMENT AND METHOD FOR MODERNIZING AN EXISTING ELEVATOR ARRANGEMENT
AUFZUGSANORDNUNG MIT EINER ELEKTRISCHEN ISOLIERUNG IN EINER STM-BEFESTIGUNGSANORDNUNG UND VERFAHREN ZUR MODERNISIERUNG EINER BESTEHENDEN AUFZUGSANORDNUNG
SYSTÈME D'ASCENSEUR AVEC UNE ISOLATION ÉLECTRIQUE DANS UN AGENCEMENT DE FIXATION STM ET PROCÉDÉ POUR MODERNISER UN AGENCEMENT D'ASCENSEUR EXISTANT
06.03.2019
Patent
Elektronische Ressource
Englisch
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