moving walk braking system
  • August 17, 2020
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Article 31 -Escalator & Moving Walk Braking Systems

Braking System Function

In this article we will be explaining in details all about both escalator braking system and also moving walk braking system.

One of the Operational” and “when necessary according to the standard.

The operational braking system must cause to a stop as well as hold it stationary. The common operational brake is an Note: The brake must never be released by electrically generated self-excitation of the braking device.

For the operational braking system the following items are highly important:

  • Calculation of the Brake Load
  • Authorized Stopping Distance
  • Deceleration rate when the braking system is actuated

The main issues of designing the braking system is that Calculation of the Escalator Brake Load for Escalator Braking System

For calculation of the Escalator Brake Load, the number of steps are calculated by dividing the vertical height of the escalator and the height of each step (Step Riser). The brake load for each type of step width is as per table below:

 

Step width

Brake Load

600 mm

60 kg

800 mm

90 kg

1000 mm

120 kg

 

full length that the passenger can stand on must be divided by 400 millimeters. The brake load for each 400 millimeters length is as per the table below:

 

Pallet width

Brake Load

800 mm

75 kg

1000 mm / 1100 mm

100 kg

1200 mm / 1400 mm

125 kg

more than 1400 mm up to 1650 mm

150 kg

 

Authorized Stopping Distance for Escalator Operational Brake

The authorized stopping distance means the distance that the step travels after the brake system is actuated.

The operational brake must activate immediately (less than 1 second after the specified braking command) but not stop too harshly to cause passenger falls. Considering the nominal speed, the range of authorized stopping distances for unloaded upwards, unloaded downwards and loaded downward moving escalators must be as per table below:

 

Nominal Speed

Stopping Distance  Range

0.5 m/s

200 – 1000 mm

0.65 m/s

300 – 1300 mm

0.75 m/s

400 – 1500  mm

 

During the operation of the braking system, the Authorized Stopping Distance for Moving Walk Operational Brake

The authorized stopping distance means the distance that the pallet travels after the less than 1 second after the specified braking command) but not stop too harshly to cause passenger falls. Considering the nominal speed, the range of authorized stopping distances for unloaded upwards, unloaded downwards and loaded downward moving inclined moving walks must be as per the table below:

Note: This applies also for unloaded and loaded horizontal moving walks in both directions.

 

Nominal Speed

Stopping Distance  Range

0.5 m/s

200 – 1000 millimeter

0.65 m/s

300 – 1300 millimeter

0.75 m/s

400 – 1500  millimeter

0.90 m/s

550 – 1700 millimeter

 

During the operation of the braking system, the downward and horizontal deceleration in moving walk must not be more than 1 m/s2 and it is recommended to achieve the shortest possible stopping distance by considering the deceleration limit.

Note: For moving walks a brake test under no load will be sufficient and for loaded moving walks, the manufacturer shall prove the stopping distances.

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