EN 50528:2024
(Main)Insulating ladders for use on or near low voltage electrical installations
Insulating ladders for use on or near low voltage electrical installations
This document is applicable to portable ladders made only of non-conductive stiles, including accessories (pole leaning device, adjustable levelling device, adjustable ladder stabilizer, etc.) used to work on or near electrical systems and installations in the low voltage range (up to 1 000 V AC/1 500 V DC). These ladders are used to provide temporary access, generally on overhead line structures, and to undertake electrical operations. They are expected to be used by one person only. These ladders, in conjunction with other protective equipment provide sufficient insulation level to protect against inadvertent contact with live low voltage installations. This document does not cover ladders used for live working on electrical installations at voltages above 1 000 V AC and above 1 500 V DC. These insulating ladders are separately covered by EN 61478. This document does not cover products not made entirely with non-conductive stiles generally called mixed ladders. In this case the EN 131 series apply. This document does not cover step stools, which are covered by EN 14183. These ladders are only for specific professional use. Only skilled persons, after an appropriate training, can use this type of ladder for professional applications. The products designed and manufactured according to this document contribute to the safety of the users provided they are used by skilled persons, in accordance with safe methods of work and the manufacturer instructions for use (where appropriate). Annex E gives a rationale to explain how a ladder which fulfils the requirements of this document used with correct accessories gives better safety for the user than an ordinary ladder.
Isolierende Leitern für Arbeiten an oder in der Nähe von Niederspannungsanlagen
Échelles isolantes pour utilisation sur ou à proximité des installations électriques basse tension
Le présent document s'applique aux échelles portables constituées uniquement de montants non conducteurs, y compris les accessoires (dispositif d'appui sur poteau, dispositif de compensation de niveau réglable, stabilisateur d'échelle réglable, etc.), qui sont utilisées pour réaliser des travaux sur ou à proximité des ouvrages ou installations électriques basse tension (jusqu'à 1 000 V en courant alternatif/1 500 V en courant continu). Ces échelles sont utilisées pour procurer un accès temporaire, généralement à des structures de lignes aériennes, et pour effectuer des travaux électriques. Elles sont prévues pour être utilisées par une seule personne à la fois. Ces échelles, associées à d'autres équipements de protection, procurent un niveau d'isolement suffisant pour éviter tout contact accidentel avec des installations basse tension sous tension. Le présent document ne traite pas des échelles utilisées pour effectuer des travaux sous tension sur des installations électriques dont la tension est supérieure à 1 000 V en courant alternatif et à 1 500 V en courant continu. Ces échelles isolantes sont traitées séparément dans l'EN 61478. Le présent document ne traite pas des produits qui ne sont pas entièrement constitués de montants non conducteurs, généralement appelés échelles mixtes. Pour ces échelles, la série EN 131 s'applique. Le présent document ne traite pas des escabeaux qui sont couverts par l'EN 14183. Ces échelles sont exclusivement destinées à un usage professionnel particulier. Seules les personnes compétentes, après avoir suivi une formation adéquate, peuvent utiliser ce type d'échelle dans le cadre professionnel. Les produits conçus et fabriqués conformément au présent document contribuent à la sécurité des utilisateurs sous réserve qu'ils soient utilisés par des personnes compétentes, en appliquant des méthodes de travail sûres et en respectant les instructions d'utilisation du fabricant (le cas échéant).
Izolirne lestve za uporabo na nizkonapetostnih električnih inštalacijah ali v njihovi bližini
Ta dokument se uporablja za prenosne lestve, izdelane samo iz neprevodnih stranic, vključno z dodatno opremo (naprava za prislonitev, nastavljiva izravnalna naprava, nastavljiv stabilizator za lestev itd.), ki se uporabljajo za delo na električnih sistemih in inštalacijah ali v njihovi bližini v nizkonapetostnem območju (do največ 1000 V AC/1500 V DC).
Te lestve se na splošno uporabljajo za zagotavljanje začasnega dostopa na konstrukcijah nadzemnih vodov in za izvajanje električnih del. Namenjene so samo eni osebi.
Te lestve v povezavi z drugo zaščitno opremo zagotavljajo zadostno stopnjo izolacije za zaščito pred nenamernim stikom z nizkonapetostnimi inštalacijami, ki so pod napetostjo.
Ta dokument ne zajema lestev, ki se uporabljajo za delo pod napetostjo na električnih inštalacijah pri napetostih nad 1000 V AC in 1500 V DC. Takšne izolirne lestve so ločeno obravnavane v standardu EN 61478.
Ta dokument ne zajema proizvodov, ki niso v celoti izdelani iz neprevodnih stranic (t. i. »mešane lestve«). V tem primeru se uporablja skupina standardov EN 131.
Ta dokument ne zajema pručk, ki so obravnavane v standardu EN 14183.
Te lestve so namenjene za profesionalno uporabo. To vrsto lestve lahko v profesionalne namene uporabljajo samo ustrezno usposobljene osebe.
Proizvodi, zasnovani in izdelani v skladu s tem dokumentom, prispevajo k varnosti uporabnikov, kadar jih uporabljajo usposobljene osebe v skladu z varnimi metodami dela in navodili za uporabo, kjer je to ustrezno.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2024
Nadomešča:
SIST EN 50528:2010
Izolirne lestve za uporabo na nizkonapetostnih električnih inštalacijah ali v njihovi
bližini
Insulating ladders for use on or near low voltage electrical installations
Isolierende Leitern für Arbeiten an oder in der Nähe von Niederspannungsanlagen
Echelles isolantes pour utilisation sur ou à proximité des installations électriques basse
tension
Ta slovenski standard je istoveten z: EN 50528:2024
ICS:
13.260 Varstvo pred električnim Protection against electric
udarom. Delo pod napetostjo shock. Live working
97.145 Lestve Ladders
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN 50528
NORME EUROPÉENNE
EUROPÄISCHE NORM May 2024
ICS 97.145; 13.260 Supersedes EN 50528:2010
English Version
Insulating ladders for use on or near low voltage electrical
installations
Échelles isolantes pour utilisation sur ou à proximité des Isolierende Leitern für Arbeiten an oder in der Nähe von
installations électriques basse tension Niederspannungsanlagen
This European Standard was approved by CENELEC on 2024-04-29. CENELEC 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 CENELEC 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 CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50528:2024 E
Contents Page
European foreword . 6
Introduction . 7
1 Scope . 9
2 Normative references . 9
3 Terms and definitions .10
3.1 Types of ladder .10
3.2 Components and devices constituting a ladder .12
3.3 Materials .15
4 Requirements .15
4.1 General .15
4.2 Classification .16
4.3 Constituent parts of ladders - Dimensional characteristics .16
4.3.1 General .16
4.3.2 General dimensions of a ladder .16
4.3.3 Rungs and steps .19
4.3.4 Platforms .20
4.4 Mechanical characteristics of the different types of ladders .23
4.4.1 Standing ladder .23
4.4.2 Leaning rung ladders .25
4.4.3 Combination ladder .27
4.4.4 General test requirements .29
4.5 Mechanical requirements .30
4.5.1 Materials .30
4.5.2 Design .30
4.6 Electrical requirements .36
4.7 Marking .36
4.7.1 General .36
4.7.2 Specific marking for insulating ladders .37
4.7.3 Maximal use of a ladder in accordance with its configuration .37
4.8 Instructions for use .38
5 Verification and testing .38
5.1 Generality.38
5.1.1 General conditions - environmental conditions,.38
5.1.2 General tolerances .39
5.2 Verification, design, dimensions, construction.39
5.3 Test methods for composite materials for ladders.39
5.3.1 Principle .39
5.3.2 Shock test .40
5.3.3 Bending test .40
5.3.4 Tensile test.41
5.4 Tests on sub-assemblies and components .42
5.4.1 Feet pull test .42
5.4.2 Foot slip test.42
5.4.3 Test on stabilizer ladder device .43
5.4.4 Test on the pole leaning devices .43
5.4.5 Test on rungs and steps .43
5.4.6 Tests on standing platforms.43
5.4.7 Test on working platforms .44
5.4.8 Swaying test.44
5.5 Tests on complete ladders .45
5.5.1 Stability test for mobile ladders with platform . 45
5.5.2 Lateral deflection test of the ladder . 45
5.5.3 Bottom stile end test . 45
5.5.4 Bending test of the stiles . 46
5.5.5 Strength test of the stiles . 46
5.5.6 Endurance test of the ladder . 46
5.5.7 Dynamic drop test . 47
5.5.8 Hooks and locking devices test . 48
5.5.9 Test of opening restraint devices and hinges of ladders . 49
5.5.10 Vertical load test on rungs, steps and platform . 49
5.5.11 Torsion test of rungs and steps . 49
5.5.12 Compression test for locking devices . 49
5.5.13 Maximum extending ladder test . 50
5.5.14 3-part combination ladder in A-position test . 50
5.5.15 Torsion test for standing ladders . 50
5.5.16 Torsion test for leaning ladder . 50
5.6 Electrical tests . 51
5.6.1 On stiles and rungs . 51
5.6.2 Other non conductive parts . 53
5.7 Durability test on the marking. . 53
5.8 Instruction for use . 53
6 Alternative means for ladders having completed the production phase . 53
7 Methods for assessment of defects and verification of performance . 53
8 Modifications . 53
Annex A (normative) Classification of defects and associated requirements and tests . 54
Annex B (informative) In-service recommendations . 55
B.1 General . 55
B.2 Use and storage . 55
B.3 Inspection before use . 55
B.4 Periodic maintenance . 55
Annex C (normative) Type test procedure . 57
C.1 General type test procedure . 57
C.2 Independent type tests .
...
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