SIST EN 81-50:2020

SLOVENSKI STANDARD
SIST EN 81-50:2020
01-julij-2020
Nadomešča:
SIST EN 81-50:2014
Varnostna pravila za konstruiranje in vgradnjo dvigal (liftov) - Pregledi in preskusi
- 50. del: Pravila konstruiranja, izračuni, pregledi in preskusi sestavnih delov
dvigal
Safety rules for the construction and installation of lifts - Examinations and tests - Part
50: Design rules, calculations, examinations and tests of lift components
Sicherheitsregeln für die Konstruktion und den Einbau von Aufzügen - Prüfungen - Teil
50: Konstruktionsregeln, Berechnungen und Prüfungen von Aufzugskomponenten
Règles de sécurité pour la construction et l'installation des élévateurs - Examens et
essais - Partie 50 : Règles de conception, calculs, examens et essais des composants
pour élévateurs
Ta slovenski standard je istoveten z: EN 81-50:2020
ICS:
91.140.90 Dvigala. Tekoče stopnice Lifts. Escalators
SIST EN 81-50:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 81-50:2020

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SIST EN 81-50:2020


EN 81-50
EUROPEAN STANDARD

NORME EUROPÉENNE

February 2020
EUROPÄISCHE NORM
ICS 91.140.90 Supersedes EN 81-50:2014
English Version

Safety rules for the construction and installation of lifts -
Examinations and tests - Part 50: Design rules,
calculations, examinations and tests of lift components
Règles de sécurité pour la construction et l'installation Sicherheitsregeln für die Konstruktion und den Einbau
des élévateurs - Examens et essais - Partie 50 : Règles von Aufzügen - Prüfungen - Teil 50:
de conception, calculs, examens et essais des Konstruktionsregeln, Berechnungen und Prüfungen
composants pour élévateurs von Aufzugskomponenten
This European Standard was approved by CEN on 1 December 2019.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 81-50:2020 E
worldwide for CEN national Members.

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SIST EN 81-50:2020
EN 81-50:2020 (E)
Contents Page
European foreword . 5
Introduction . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 List of significant hazards . 9
5 Design rules, calculations, examinations and tests . 11
5.1 General provisions for type examinations of safety components . 11
5.1.1 Object and extent of the tests . 11
5.1.2 General provisions . 11
5.2 Type examination of landing and car door locking devices . 12
5.2.1 General provisions . 12
5.2.2 Examination and tests . 12
5.2.3 Test particular to certain types of locking devices . 15
5.2.4 Type examination certificate . 15
5.3 Type examination of safety gear . 15
5.3.1 General provisions . 15
5.3.2 Instantaneous safety gear . 16
5.3.3 Progressive safety gear . 18
5.3.4 Comments . 21
5.3.5 Type examination certificate . 21
5.4 Type examination of overspeed governors . 22
5.4.1 General provisions . 22
5.4.2 Check on the characteristics of the overspeed governor . 22
5.4.3 Type examination certificate . 23
5.5 Type examination of buffers . 23
5.5.1 General provisions . 23
5.5.2 Samples to be submitted . 24
5.5.3 Test . 24
5.5.4 Type examination certificate . 27
5.6 Type examination of safety circuits containing electronic components and/or
programmable electronic systems (PESSRAL) . 28
5.6.1 General provisions . 28
5.6.2 Test samples . 28
5.6.3 Tests . 29
5.6.4 Type examination certificate . 30
5.7 Type examination of ascending car overspeed protection means . 31
5.7.1 General provisions . 31
5.7.2 Statement and test sample . 31
5.7.3 Test . 32
5.7.4 Possible modification to the adjustments . 33
5.7.5 Test report . 33
5.7.6 Type examination certificate . 33
5.8 Type examination of unintended car movement protection means . 34
5.8.1 General provisions . 34
5.8.2 Statement and test sample . 34
5.8.3 Test . 35
5.8.4 Possible modification to the adjustments . 37
5.8.5 Test report . 37
5.8.6 Type examination certificate . 37
5.9 Type examination of rupture valve/one-way restrictor . 37
5.9.1 General provisions . 37
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SIST EN 81-50:2020
EN 81-50:2020 (E)
5.10 Guide rails calculation . 42
5.10.1 Range of calculation . 42
5.10.2 Bending . 42
5.10.3 Buckling . 43
5.10.4 Combination of bending and compression/tension or buckling stresses . 44
5.10.5 Flange bending . 45
5.10.6 Deflections . 46
5.11 Evaluation of traction . 46
5.11.1 Introduction . 46
5.11.2 Traction calculation . 47
5.11.3 Fomulae for a general case . 51
5.12 Evaluation of safety factor on suspension ropes for electric lifts . 54
5.12.1 General . 54
5.12.2 Equivalent number N of pulleys . 54
equiv
5.12.3 Safety factor . 56
5.13 Calculations of rams, cylinders, rigid pipes and fittings . 58
5.13.1 Calculation against over pressure . 58
5.13.2 Calculations of the jacks against buckling . 59
5.14 Pendulum shock tests . 64
5.14.1 General . 64
5.14.2 Test rig . 64
5.14.3 Tests . 64
5.14.4 Interpretation of the results . 65
5.14.5 Test report . 65
5.15 Electronic components - Failure exclusion . 69
5.16 Design rules for programmable electronic systems (PESSRAL) . 76
Annex A (normative) Model form of type examination certificate . 77
Annex B (normative) Programmable electronic systems in safety related applications for lifts
(PESSRAL) . 78
B.1 Common measures . 78
B.2 Specific measures . 80
B.3 Descriptions of possible measures . 84
Annex C (informative) Example for calculation of guide rails . 89
C.1 General . 89
C.2 General configuration for lifts with safety gear . 91
C.2.1 Safety gear operation . 91
C.2.1.1 Bending stress . 91
C.2.1.2 Buckling . 92
C.2.1.3 Combined stress . 92
C.2.1.4 Flange bending . 93
C.2.1.5 Deflections . 93
C.2.2 Normal operation, running . 93
C.2.2.1 Bending stress . 93
C.2.2.2 Buckling . 93
C.2.2.3 Combined stress . 93
C.2.2.4 Flange bending . 93
C.2.2.5 Deflection . 94
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SIST EN 81-50:2020
EN 81-50:2020 (E)
C.2.3 Normal operation, loading . 94
C.2.3.1 Bending stress . 94
C.2.3.2 Buckling . 94
C.2.3.3 Combined stress . 94
C.2.3.4 Flange bending . 95
C.2.3.5 Deflections. 95
Annex D (informative) Calculation of traction – Example . 96
Annex E (informative) Equivalent number of pulleys N - Examples . 98
equiv
Annex ZA (informative)  Relationship between this European Standard and the essential
requirements of Directive 2014/33/EU aimed to be covered . 99
Bibliography . 101


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SIST EN 81-50:2020
EN 81-50:2020 (E)
European foreword
This document (EN 81-50:2020) has been prepared by Technical Committee CEN/TC 10 “Lifts,
escalators and moving walks”, the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2020, and conflicting national standards shall
be withdrawn at the latest by February 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 81-50:2014.
This document is a revision of EN 81-50:2014. Significant changes made are as follows:
— All externally referenced standards have now been dated
— A new Annex ZA has been developed in order to be aligned with the requirements of the EU
Commission Standardization Request “M/549 C(2016) 5884 final”
No technical changes have been made during this revision
This standard is the culmination of the progressive development of the EN standards for lifts. Previous
versions of the EN 81-1 and EN 81-2 standards incorporated into EN 81-20:2020 and EN 81-50:2020
include:
— EN 81-1:1985, Safety rules for electric lifts;
— EN 81-1:1998, Safety rules for electric lifts;
— EN 81-1:1998, Corrigendum No 1:1999;
— EN 81-1:1998/A1:2005, incorporating programmable electronic system in safety related
applications for lifts;
— EN 81-1:1998/A2:2004, incorporating machine-room-less lifts;
— EN 81-1:1998+A3:2009, Incorporating unintended car movement with open doors;
— EN 81-2:1987, Safety rules for hydraulic lifts;
— EN 81-2:1998, Safety rules for hydraulic lifts;
— EN 81-2:1998, Corrigendum No 1:1999;
— EN 81-2:1998/A1:2005, incorporating programmable electronic system in safety related
applications for lifts;
— EN 81-2:1998/A2:2004, incorporating machine-room-less lifts;
— EN 81-2:1998+A3:2009, incorporating unintended car movement with open doors.
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SIST EN 81-50:2020
EN 81-50:2020 (E)
The content of this standard provides the design rules, calculations, examinations and tests for lifts
component, the requirements of which are specified in other EN 81 series of standards. Therefore this
standard can only be used in conjunction with the standards for specific lift types, e.g. EN 81-20 for
passenger and goods passenger lifts.
This standard is part of the EN 81 series of standards. The structure of the EN 81 series is described in
CEN/TR 81-10.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this
document.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
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SIST EN 81-50:2020
EN 81-50:2020 (E)
Introduction
The object of this standard is to define safety rules related to lifts with a view to safeguarding persons
and objects against the risk of accidents associated with the user-, maintenance- and emergency
operation of lifts.
Reference should be made to the respective introductions of the standards calling for the use of this
standard with regard to persons and objects to be safeguarded, assumptions, principles, etc.
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SIST EN 81-50:2020
EN 81-50:2020 (E)
1 Scope
This document specifies the design rules, calculations, examinations and tests of lift components which
are referred to by other standards used for the design of passenger lifts, goods passenger lifts, goods
only lifts, and other similar types of lifting appliances.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies
EN 81-20:2020, Safety rules for the construction and installation of lifts – Lifts for the transport of persons
and goods – Part 20: Passenger and goods passenger lifts
EN 10025 (series), Hot rolled products of non-alloy structural steels - Technical delivery conditions
EN 12385-5:2002, Steel wire ropes - Safety - Part 5: Stranded ropes for lifts
EN 60068-2-6:2008, Environmental testing - Part 2-6: Tests - Test Fc: Vibration (sinusoidal)
EN 60068-2-14:2009, Environmental testing - Part 2-14: Tests - Test N: Change of temperature
EN 60068-2-27:2009, Environmental testing - Part 2-27: Tests - Test Ea and guidance: Shock
EN 60112:2003, Method for the determination of the proof and the comparative tracking indices of solid
insulating materials
EN 60664-1:2007, Insulation coordination for equipment within low-voltage systems - Part 1: Principles,
requirements and tests
EN 60947-4-1:2010, Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters -
Electromechanical contactors and motor-starters
EN 60947-5-1:2017, Low-voltage switchgear and controlgear - Part 5-1: Control circuit devices and
switching elements - Electromechanical control circuit devices
EN 61508-1:2010, Functional safety of electrical/electronic/programmable electronic safety-related
systems - Part 1: General requirements
EN 61508-2:2010, Functional safety of electrical/electronic/programmable electronic safety-related
systems - Part 2: Requirements for electrical/electronic/programmable electronic safety-related systems
EN 61508-3:2010, Functional safety of electrical/electronic/programmable electronic safety-related
systems - Part 3: Software requirements
EN 61508-7:2010, Functional safety of electrical/electronic/programmable electronic safety-related
systems - Part 7: Overview of techniques and measures
EN ISO 12100:2010, Safety of machinery - General principles for design - Risk assessment and risk
reduction (ISO 12100:2010)
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SIST EN 81-50:2020
EN 81-50:2020 (E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
approved body
organization or manufacturer, operating an approved full quality assurance system to undertake testing
of safety components
3.2
safety component
1
)
component provided to fulfil a safety function when in use
3.3
type examination certificate
document issued by an approved body carrying out a type-examination in which it certifies that the
product example under consideration complies with the provisions applicable to it
4 List of significant hazards
This clause contains all the significant hazards, hazardous situations and events, as far as they are dealt
with in this standard, identified by risk assessment as significant for this type of machinery and which
require action to eliminate or reduce the risk (see Table 1).

1)
Under the Lifts Directive there is a list of items considered as safety components including safety gear, speed governor,
landing door locks, etc. For the purposes of this standard other components may also be regarded as safety components
where the aim is to certify their safe operation by type testing.

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SIST EN 81-50:2020
EN 81-50:2020 (E)
Table 1 — List of significant hazards
Hazards
No Relevant clauses
as listed in Annex B of EN ISO 12100:2010
1 Mechanical hazards due to:
Acceleration, deceleration (kinetic energy) 5.3; 5.4; 5.5; 5.7; 5.8; 5.9
Approach of a moving element to a fixed part 5.2
1 Mechanical hazards due to: (continued)
Elastic elements 5.10; 5.11; 5.12; 5.13
Falling objects 5.3; 5.4; 5.5; 5.9
Gravity (stored energy) 5.3; 5.4; 5.5; 5.9
Height from the ground 5.3; 5.4; 5.5; 5.9
High pressure 5.13
Moving elements 5.2; 5.3; 5.4; 5.5; 5.6; 5.7; 5.8; 5.9; 5.10; 5.11; 5.12;
5.13; 5.14; 5.15; 5.16
Rotating elements 5.4; 5.11; 5.12
Stability 5.10; 5.11; 5.12; 5.13; 5.14
Strength 5.10; 5.11; 5.12; 5.13; 5.14
2 Electrical hazards
Arc 5.2; 5.4; 5.6; 5.7; 5.8; 5.15; 5.16
Electrostatic phenomena 5.2; 5.4; 5.6; 5.7; 5.8; 5.15; 5.16
Live parts 5.2; 5.4; 5.6; 5.7; 5.8; 5.15; 5.16
Not enough distance to live parts under high voltage 5.2; 5.4; 5.6; 5.7; 5.8; 5.15; 5.16
Overload 5.2; 5.4; 5.6; 5.7; 5.8; 5.15; 5.16
Parts which have become live under faulty conditions 5.2; 5.4; 5.6; 5.7; 5.8; 5.15; 5.16
Short-circuit 5.2; 5.4; 5.6; 5.7; 5.8; 5.15; 5.16
6 Hazards generated by radiation
Low frequency electromagnetic radiation 5.6; 5.15; 5.16
Radio frequency electromagnetic radiation 5.6; 5.15; 5.16
9 Hazards associated with the environment in 5.2; 5.3; 5.4; 5.5; 5.6; 5.7; 5.8; 5.9; 5.10; 5.11; 5.12;
which the machine is used 5.13; 5.14; 5.15; 5.16

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