H - Electricity – 02 – K
Patent
H - Electricity
02
K
H02K 11/00 (2006.01) F16P 3/00 (2006.01) F16P 3/08 (2006.01) G01R 19/155 (2006.01) G01R 31/34 (2006.01) G08B 21/02 (2006.01) H02P 3/00 (2006.01)
Patent
CA 2213912
The invention relates to a method and a zero-speed monitor for monitoring a three-phase machine (1) which has been disconnected from the electrical mains and is running down, the voltage generated by the three-phase machine (1) being supplied to a zero-speed monitor and release lines (F1, ..., F4) for safety-relevant devices being disconnected when it is confirmed that the three-phase machine (1) is stationary, one phase of the generated voltage being checked respectively in two channels for zero crossings and, if a zero crossing occurs, a signal being produced which, after DC-decoupling, is used to control the operation of mutually interlocked disconnection relays of the two channels via these releasing disconnection signals.
Méthode et moniteur de vitesse nulle permettant de contrôler une machine triphasée (1) qui a été débranchée du secteur et cesse de fonctionner. La tension produite par la machine triphasée (1) alimente un moniteur de vitesse nulle, et les lignes de validation (F1, ..., F4) des dispositifs sécuritaires sont débranchées lorsqu'il est confirmé que la machine triphasée (1) est stationnaire. Une phase de la tension produite est examinée séparément dans deux canaux pour vérifier s'il y a passage à zéro et, le cas échéant, un signal est produit. Après découplage c.c., ce signal est utilisé pour commander le fonctionnement de relais de débranchement interverrouillés associés aux deux canaux au moyen de ces signaux de débranchement des lignes de validation.
K.a. Schmersal Gmbh & Co.
Sim & Mcburney
LandOfFree
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