ThyssenKrupp TW63B, Operating Manual

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Operating manual Special versions (optional)
TW63B drive
thyssenkrupp Aufzugswerke 74 Version 09/2018
9.2 Brake monitoring circuit
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The brake monitoring circuit checks the brake shoes.

It prevents motor movements when the brake is partially or fully closed and
enables detection of any brake lining wear at an early stage.

Switches (sensors SA3 or microswitches SA3.1) are used to check whether the
brake shoes are closed, open, or worn.

The travel signal - derived from the W/W1 contactor - is used for the evaluation.

It is indicated by means of light emitting diodes

on the sensors (SA3).
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on the brake monitoring in the control cabinet and/or by deactivation of the
drive.
If a Teleservice device is connected, the fault is shown on the display.
9.2.1 Installation
1. If not included in the scope of supply, make 2 lines (3 x 0.75 mm² for SA3 and 2
x 0.75 mm² for SA3.1 with PVC sheaths) for direct connection of the switches to
the control system and connect the switches.
2. Mount the hexagon screws (microencapsulated) with lock nut to be adjusted on
the brake shoes (pre-assembled at the plant). The switch tappet on the sensor
must be opposite the setting screw, but should not make contact with it.

9.2.2 Setting SA3
Before starting to set the sensor; the stroke of the brake shoes must be adjusted!
Description, see

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1. Switch on the emergency operation switch and elevator control system.
2. Adjust the setting screw for the switch.
3. The LED lights up.
4. Turn back the screw slowly.
5. The LED goes out.
6. Move the adjusting screw by ¼ turns (corresponds to approx. 0.3 mm) in the
direction of the switch and secure with a lock nut.
7. LED lights up continuously.
8. Open and close the brakes by switching the motor
9. In doing so, check that the sensors switch between open and closed brake.

9.2.3 Setting SA3.1
The break contact with contacts 11 and 12 is used to monitor the position of the brake
shoes. With the brake open, the switch is closed.
The make contact closes contacts 23 / 24 only when the wear limit of the brake linings
has been reached and the brake is closed. The contacts must be switched in such a