BS EN 81-50:2020 pdf free.Safety rules for the construction and installation of lifts Examinations and tests Design rules, calculations, examinations and tests of lift components.
BS EN 81-50 These tests have the purpose of verifying the strength of the mechanical locking components and the electrical components.
The sample of the locking device in its normal operating position is controlled by the devices normally used to operate it.
The sample shall be lubricated in accordance with the requirements of the manufacturer of the locking device.
When there are several possible means of control and positions of operation, the endurance test shall be made in the arrangement which is regarded as the most unfavourable from the point of view of the forces on the components.
The number of complete cycles of operation and the travel of the locking components shall be registered by mechanical or electrical counters.The locking device shall be submitted to 1 000 000 (±1 %) complete cycles; one cycle comprises one
forward and return movement over the full travel possible in both directions.
The driving of the device shall be smooth, without shocks, and at a rate of 60 (±10%) cycles per minute. During the endurance test the electrical contact of the lock shall close a resistive circuit under the rated voltage and at a current value double that of the rated current.
lithe locking device is provided with a mechanical checking device for the locking pin or the position of the locking element, this device shall be submitted to an endurance test of 100 000 (±1 %) cycles.
The driving of the device shall be smooth, without shocks, and at a rate of 60 (±10 %) cycles per minute.
According to the requirements laid down in the standards calling for the use of this standard the devices providing direct mechanical linkage between panels (e.g. EN 81-20:2020, 5.3.14.1) or indirect mechanical linkage (e.g. EN 81-20:2020, 5.3.14.2) are considered as forming part of the locking device.
These devices shall be submitted to the tests mentioned in 5.2.2. The number of cycles per minute in such endurance tests shall be suited to the dimensions of the construction.BS EN 81-50 pdf download.