OPERATING MANUAL NBS COMMISSIONING / MAINTENANCE
ThyssenKrupp Aufzugswerke GmbH
6. Commissioning / maintenance
6.1 Commissioning
Before commissioning a drive with NBS emergency brake, the following
points are to be checked or must have been performed:
The 3 brake release screws marked red on the magnetic brake must be
removed from the brake housing. (With gear drive TW45, only 2 screws.) See
chapter 3 "Mounting the NBS"
The operating switch (break contact) for the NBS emergency brake on the
governor must be closed.
The switch function, i.e. that the operating switch interrupts the safety chain
when the speed governor is triggered, and the setting of the operating switch
at the governor must be checked beforehand.
The time delay at the operating contactor +NBS-K77.3 in the control unit
must be set in such a way that the NBS emergency brake closes with approx.
1 second delay after the drive has come to a standstill. The switch for the
emergency brake control at the control cabinet must be in the position
"normal mode".
NB: following any change to the NBS brake activation, the function of the
brake is to be checked before beginning elevator operation.
NBS brake test: the function and effect of the NBS are to be checked before
commissioning by means of an emergency stop at rated speed.
Test sequence
Run the empty elevator car to the bottom landing.
Set the switch of the NBS at the control cabinet to "normal mode".
Move upwards with an empty elevator car.
Hold the service brake open by pressing the brake release lever.
On reaching rated speed, trigger the NBS emergency brake by operating the
additional switch on the speed governor or by switching off the main switch
on the control system.
Note: the elevator car should be located sufficiently far below the top
terminal landing at the point in time of triggering.
Effect: the drive switches off, the NBS emergency brake responds and
decelerates the movement of the elevator car to a standstill.
NB: observe the process during triggering.
If the braking effect is inadequate or if the braking path is inadequate, brake
the elevator car by letting go of the brake release lever.
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