Monitoring device for drive equipment for lifts

Details Monitoring device for drive equipment for lifts Monitoring device for drive equipment for lifts

B - Operations, Transporting

66

B

B66B 5/02 (2006.01) B66B 5/00 (2006.01) B66B 11/04 (2006.01) H03K 17/00 (2006.01)

Patent

CA 2321154

An ascertaining of a definite switching-off of drive equipment for lifts is carried out in the manner that a control on the input side and provided externally of a frequency changer power unit ascertains the presence or the absence of signals, which are derived from the mains voltage, at the input of the frequency changer power unit or the static transformer and on ascertaining the presence of one or more signals can interrupt the energy flow to the frequency changer power unit by issue of a signal to a switching device.

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