OPERATING MANUAL NBS PRODUCT DESCRIPTION
ThyssenKrupp Aufzugswerke GmbH
2.6 Releasing the NBS emergency brake mechanically
1 Threaded hole for brake
release
2 Mayr: 2 hexagon socket bolts M12
Warner: 3 hexagon socket bolts M8
3 Allen key
If the NBS emergency brake has to be released or put out of operation for
certain reasons (testing purposes or emergency rescue), proceed as follows:
Turn off the power supply to the installation.
Remove the hexagon socket bolts (Fig. 2.6.1, Item 2) from the mounting on
the coverage and screw them into the holes marked in Fig. 2.6.1, Item 1, until
the bolt heads make contact with the brake housing.
Reinsert the Allen key in the reception point on the cover.
NB: the NBS emergency brake is now out of operation.
With the control system switched off, the drive can be moved by carefully
operating the brake release lever.
If the drive does not start up on its own when the brake is opened, it can be
moved by turning the handwinding wheel.
Caution: only hold the release lever open for very short periods. If the brake
is released for longer, there is a danger that overspeed will trigger the safety
gear.
NB: the release screws are to be removed from the brake housing before
reconnection of the elevator. A safety circuit means that it is not possible to
move the elevator car with motor drive with a manual released NBS
emergency brake.
Fig. 2.6.1
See installation
and operating
manual from
Mayr and
Warner.
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