CEN/TS 17946:2023

Helmets for S-EPAC riders

This document specifies requirements and test methods for helmets worn by users of speed electrically power assisted bicycles (S-EPACs). This document also specifies requirements and test methods for integrated visors in helmets worn by users of S-EPACS.
Requirements and the corresponding methods of test are given for the following:
-   construction, including field of vision;
-   shock absorbing properties;
-   retention system properties, including chin strap and fastening devices;
-   marking and information.

Helme für S-EPAC-Benutzer

Čelade za S-EPAC kolesarje

Ta dokument določa zahteve in preskusne metode za čelade, ki jih nosijo uporabniki hitrih koles z električnim pomožnim pogonom (S-EPAC). Ta dokument določa tudi zahteve in preskusne metode za vizirje, vgrajene v čelade, ki jih nosijo uporabniki hitrih koles z električnim pomožnim pogonom.
Podane so zahteve in ustrezne preskusne metode za naslednja področja:
–   izdelavo, vključno z vidnim poljem;
–   lastnosti absorpcije udarcev;
–   lastnosti zadrževalnega sistema, vključno s pasom za brado in napravami za pripenjanje;
–   označevanje in informacije.

General Information

• Status: Published
• Publication Date: 18-Jul-2023
• ICS: 13.340.20 - Head protective equipment
• Technical Committee: CEN/TC 158 - Head protection
• Drafting Committee: CEN/TC 158/WG 15 - Helmets for S-EPAC users
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 19-Jul-2023
• Due Date: 29-Jul-2023
• Completion Date: 19-Jul-2023
• Ref Project: SIST-TS CEN/TS 17946:2023 - Helmets for S-EPAC riders

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2023
Čelade za S-EPAC kolesarje
Helmets for S-EPAC riders
Helme für S-EPAC-Benutzer
Ta slovenski standard je istoveten z: CEN/TS 17946:2023
ICS:
13.340.20 Varovalna oprema za glavo Head protective equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TS 17946
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
July 2023
TECHNISCHE SPEZIFIKATION
ICS 13.340.20
English Version
Helmets for S-EPAC riders
Helme für S-EPAC-Benutzer
This Technical Specification (CEN/TS) was approved by CEN on 12 June 2023 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to
submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS
available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in
parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.

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, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N

EUROPÄISCHES KOMITEE FÜR NORMUN G

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TS 17946:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Requirements . 9
4.1 Materials . 9
4.2 Construction . 9
4.3 Field of vision . 9
4.4 Shock absorbing capacity . 11
4.5 Durability . 11
4.6 Retention system . 11
4.6.1 General. 11
4.6.2 Chin strap . 11
4.6.3 Fastening device . 11
4.6.4 Colour . 11
4.6.5 Strength . 11
4.6.6 Effectiveness . 11
4.6.7 Ease of release . 11
4.7 Integrated visors . 12
5 Testing . 12
5.1 Headforms . 12
5.2 Inspection and determination of mass . 12
5.3 Number of samples and sequence of tests . 12
5.4 Determination of shock absorbing capacity . 13
5.4.1 Test area . 13
5.4.2 Conditioning . 15
5.4.3 Apparatus . 15
5.4.4 Procedure . 18
5.5 Determination of retention system strength and ease of release . 18
5.5.1 Apparatus . 18
5.5.2 Procedure . 19
5.6 Determination of retention system effectiveness . 19
5.6.1 Apparatus . 19
5.6.2 Procedure . 21
5.7 Determination of field of vision . 22
5.8 Test report . 22
6 Marking . 22
7 Information supplied by the manufacturer . 23
Annex A (informative) Alternative procedure for artificial ageing . 24
Annex B (informative) Mark of approval . 25
Annex C (normative) Integrated visors for S-EPAC users . 26
C.1 Scope . 26
C.2 Normative references . 26
C.3 Terms and definitions . 26
C.4 Requirements . 26
C.4.1 General . 26
C.4.2 Design and manufacture . 26
C.4.3 Materials . 26
C.4.4 Sit and fit . 27
C.4.5 Ventilation . 27
C.4.6 Optical requirements . 27
C.4.7 Non optical requirements . 30
C.4.8 Optional requirements – Resistance to fogging . 31
C.5 Testing . 31
C.5.1 General . 31
C.5.2 Conditioning and test conditions . 32
C.5.3 Field of vision . 32
C.5.4 Refractive powers . 34
C.5.5 Transmittance. 34
C.5.6 Reduced luminance coefficient . 35
C.5.7 Resistance to ultraviolet radiation . 35
C.5.8 Impact resistance . 36
C.5.9 Resistance to surface damage by fine particles . 37
C.5.10 Resistance to fogging . 37
C.5.11 Visual inspection . 37
C.5.12 Sit and fit . 37
Annex D (normative to Annex C) Photochromic sunglare oculars for use in twilight or at night . 38
Annex E (normative to Annex C) Spectral functions for the calculation of luminous transmittance
and relative visual attenuation coefficients (quotients) . 39
Annex F (normative to Annex C) Spectral functions for the calculation of solar UV transmittance
values . 41
Annex G (normative to Annex C) Spectral function for the calculation of infrared transmittance . 43
Annex H (normative to Annex C) Cut-on filter for UV filtering . 45
Annex I (normative to Annex C) Uncertainty of measurement and results interpretation . 47
Bibliography . 49

European foreword
This document (CEN/TS 17946:2023) has been prepared by Technical Committee CEN/TC 158 “Head
protection”, the secretariat of which is held by SIS.
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 responsib
...