OPERATING MANUAL NBS PRODUCT DESCRIPTION
ThyssenKrupp Aufzugswerke GmbH
In both cases, the power supply to the electromagnets that hold the disc
brake open while the elevator is moving is switched off. The NBS emergency
brake closes and brakes the drive on the traction sheave or worm drive shaft.
2.1.1 Measures after activation of the NBS emergency brake
Determine what caused the brake to respond.
a) At overspeed, the switches on the speed
governor must be operated (open).
Check the function and operability of the drive and drive brake; reset the
switches and governor to their operating positions. (Engage the locking
spring on the speed governor in the middle position).
b) In the event of an emergency stop or power failure, the switches are in the
operating position (closed).
c) In the case of UCM, the installation was shut down with a UCM error. The
elevator control system must store this error. A restart may only be
possible by manual intervention of maintenance personnel.
If the installation is defective or without current, initiate rescue.
To move the elevator car in order to achieve this, the NBS emergency brake
must be put out of operation.
Proceed as described in chapter 6.3 and comply with the specified safety
instructions.
Determine and, if possible, rectify the cause of the overspeed to exclude a
repetition of the malfunction.
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