Auxiliary brake in Escalator
  • January 20, 2021
  • 0
  • 1105
  • 5.0/5

Article 29 -Auxiliary brake in Escalator & Moving walk.

As we mention in article “Escalator & Moving Walk Braking Systems”, all escalators and moving walks must be equipped with an operational break system, but the auxiliary brake must be added under the following conditions:

  • The connection between the operational brake and the driving sprockets of the steps/pallets is not accomplished by shafts, gear wheels, multiplex chains or when it is accomplished by only a single chain.
  • The operational brake does not have an electro-mechanical brake.
  • The vertical height of the escalator is more than 6 meters.

The activation of the auxiliary brake must be detected by an electrical safety device or suitable function and the auxiliary brake must become active as below conditions:*

  • The speed goes above 1.4 times the nominal speed.
  • At any time, the device reverses direction for any abnormal reason.

The auxiliary brake can operate together with the operational brake in case of power failure or an interruption of a safety circuit as well as when the operation of the auxiliary brake is required as mentioned above in *.

The auxiliary braking system must be designed in such a way that when escalators and moving walks with brake load travel downward, it brings the escalator or moving walk to a stop and holds it stationary. Under all operating conditions the downward deceleration must not be more than 1 m/s2.

The auxiliary brakes must be of the mechanical (friction) type and the connection between the auxiliary brake and the driving sprockets of the steps/ pallets must be accomplished by shafts, gear wheels, multiplex chains or more than one single chain. Connection of auxiliary brake to handrail drive shaft is not permitted.

Note: While auxiliary brakes are operating it is not required to consider the stopping distances of operational brakes.

Note: brakes must be designed in a way that they can be released manually by applying continuous pressure.

How do you rate this article?

To learn more about La Grazia website facilities, please watch this video.

Please Wait ...

It May Take a Few Minutes