BS EN 81-50 pdf free download
BS EN 81-50-2020 pdf free download.Safety rules for the construction and installation oflifts – Examinations and tests Part 50: Design rules, calculations, examinations and tests of lift components.
5 Design rules, calculations, examinations and tests
5.1 General provisions for type examinations of safety components
5.1.1 Object and extent of the tests
The safety component/device is submitted to a test procedure to verify that insofar as construction and operation are concerned, it conforms to the requirements imposed by this standard. It shall be checked in particular that the mechanical, electrical and electronic components of the device are properly rated and that in the course of time the device does not lose its effectiveness, particularly through wear or aging. If the safety component is needed to satisfy particular requirements (waterproof. dust proof or explosion proof construction) supplementary examinations and/or tests under appropriate criteria shall be made.
5.1.2 General provisions
5.1.2.1 For the purposes of this standard it is assumed that the laboratory undertakes both the testing and the certification as an approved body. An approved body may be that of a manufacturer operating an approved full quality assurance system. In certain cases the test laboratory and the body approved for the issue of type examination certificates may be separate. In these cases the administrative procedures may differ from those described in this standard.
5.1.2.2 The application for type examination shall be made by the manufacturer of the component or their authorized representative and shall be addressed to an approved test laboratory.
5.1.2.3 The despatch of samples for examination shall be made by agreement between the laboratory and the applicant.
5.1.2.4 The applicant may attend the tests.
5.1.2.5 If the laboratory entrusted with the complete examination of one of the components requiring the supply of a type examination certificate has not available appropriate means for certain tests or examinations, it may under its responsibility have these made by other laboratories with the agreement of the applicant.
5.1.2.6 The precision of the instruments shall allow, unless specified, measurements to be made within the following accuracy:
a) ± 1 % masses, forces, distances, speeds;
b) ± 2 % accelerations, retardations;
c) ± 5 % voltages, currents;
d) ± 5 °C temperatures;
e) recording equipment shall be capable of detecting signals, which vary in time of 0,01 5;
t) ± 2,5 % flow rate;
g) ± 1 % pressure Ps 200 kPa;
h) ± 5 % pressure P> 200 kPa.
5.2 Type examination of landing and car door locking devices
5.2.1 General provisions
5.2.1.1 Field of application
These procedures are applicable to locking devices for landing and car doors. It is understood that each component taking part in the locking of doors and in the checking of the locking forms part of the locking device.
5.2.1.2 Documents to be submitted
5.2.1.2.1 Schematic arrangement drawing with description of operation
This drawing shall show clearly all the details relating to the operation and the safety of the locking device, including:
a) the operation of the device in normal service showing the effective engagement of the locking elements and the point at which the electrical safety device operates;
b) the operation of the device for mechanical checking of the locking position if this device exists;
c) the control and operation of the emergency unlocking device;
d) the type (AC and/or DC) and the rated voltage and rated current.
5.2.1.2.2 Assembly drawing with key
This drawing shall show all parts, which are important to the operation of the locking device, in particular those required to conform to requirements of this standard. A key shall indicate the list of principal parts, the type of materials used, and the characteristics of the fixing elements.
5.2.1.3 Test samples
One door locking device shall be submitted to the laboratory.
If the test is carried out on a prototype, it shall be repeated later on a production model.
If the test of the locking device is only possible when the device is mounted in the corresponding door the device shall be mounted on a complete door in working order. However, the door dimensions may be reduced by comparison with a production model, on condition that this does not falsify the test results.
5.2.2 Examination and tests
5.2.2.1 Examination of operation
This examination has the aim of verifying that the mechanical and electrical components of the locking device are operating correctly with respect to safety, and in conformity with the requirements of this standard, and the standard calling for this locking device and that the device is in conformity with the particulars provided in the application.
In particular it shall be verified that:
a) there is at least 7 mm engagement of the locking elements before the electric safety device operates;
b) it is not possible from positions normally accessible to persons to operate the lift with a door open or unlocked, after one single action, not forming part of the normal operation.BS EN 81-50 pdf download.
