Continuous handling equipment and systems - Safety and EMC requirements for fixed belt conveyors for bulk materials

This European standard deals with the technical requirements to minimise the risks due to the hazards listed in clause 4, which can arise during operation and maintenance of fixed belt conveyors and systems as defined in 3.1 to 3.2.4 and designed for continuously conveying loose bulk materials from the loading point(s) to the unloading point(s). Requirements for electromagnetic compatibility are also covered. This standard applies to use in ambient air temperatures of -15° C to + 40° C. This standard does not cover: a) use in open cast lignite mining or use underground, such as in mines or tunnels; b) use in public areas or for man-riding; c) floating, dredging and ship mounted equipment; d) conveyors requiring a high level of cleanliness for hygiene reasons, e.g. in direct contact with foodstuffs or pharmaceuticals; e) conveyors using a moving belt with other than a continuous rubber or polymeric surface for the conveying medium; f) transportation of the conveyor; g) the design of the supporting structure which is not part of a conveyor (see 3.2); h) the effects of wind; i) hazards resulting from handling specific hazardous materials, (e.g. explosives, radiating material); j) hazards resulting from contact with or inhalation of harmful fluids, gases, mists, fumes or dust; k) biological and micro-biological (viral or bacterial) hazards; l) hazards due to heat radiation from the materials handled; m) hazards caused by operation in electromagnetic fields outside the range of EN 61000-6-2:1999; n) hazards caused by operation subject to special regulations (e.g. explosive atmospheres); o) hazards caused by noise; p) hazards caused by the use of ionising radiation sources; q) hazards caused by hydraulic equipment. The safety requirements of this standard apply to equipment and systems placed on the market after the date of publication of this standard.

Stetigförderer und Systeme - Sicherheits- und EMW- Anforderungen für ortsfeste Gurtförderer für Schüttgutt

1.1   Diese Europäische Norm behandelt die technischen Anforderungen, um die in Abschnitt 4 aufgeführten Gefährdungen zu minimieren. Diese Gefährdungen können während des Betriebs und der Instandhaltung von in Abschnitt 3.1 bis 3.2.4 definierten ortsfesten Gurtförderern und Systemen, die für die Förderung von Schüttgut von der(den) Be- zu der(den) Entladestelle(n) gestaltet wurden, entstehen. Anforderungen an Elektromagnetische Verträglichkeit werden ebenfalls berücksichtigt.
1.2   Diese Norm gilt für den Gebrauch bei einer Umgebungstemperatur von -15°C bis +40°C.
1.3   Diese Norm gilt nicht für:
a) Stetigförderer und Systeme im Braunkohletagebau oder im untertägigen Bergbau wie in Minen oder in Tunnels;
b) den Gebrauch in der Öffentlichkeit und die Personenbeförderung;
c) schwimmende, unter Wasser baggernde und auf Schiffen montierte Einrichtungen;
d) Stetigförderer, die ein hohes Reinheitsniveau aus hygienischen Gründen erfördern, z. B. in direktem Kontakt mit Nahrungs- und Arzneimitteln;
e) Förderer, die einen beweglichen Gurt als Fördermittel verwenden, dessen gesamte Oberfläche nicht gänzlich aus Gummi oder Polymeren besteht;
f) den Transport der Einrichtung;
g) die Gestaltung des Tragwerks, das nicht Teil des Stetigförderers ist (siehe 3.2);
h) Einwirkungen durch Wind;
i) Gefährdungen, die sich aus der Handhabung von speziell gefährlichen Materialien (z. B. Sprengstoffe, strahlendes Material) ergeben;
j) Gefährdungen, die sich durch den Kontakt mit oder das Einatmen von gefährdenden Flüssigkeiten, Gasen, Nebeln, Dämpfen und Stäuben ergeben;
k) biologische und mikrobiologische Gefährdungen (durch Viren oder Bakterien);
l) Gefährdungen aufgrund der Hitzestrahlung der gehandhabten Materialien;
m) Gefährdungen, verursacht durch den Betrieb in elektromagnetischen Feldern außerhalb des Bereichs der
EN 61000-6-2:1999;

Equipements et systèmes de manutention continue - Prescriptions de sécurité et de CEM pour les transporteurs à courroie fixes pour produits en vrac

La présente Norme européenne traite des prescriptions techniques relatives à la minimisation des risques dus aux phénomènes dangereux énumérés à l’article 4, susceptibles d’apparaître au cours du fonctionnement et de la maintenance des transporteurs et systèmes à courroie fixes définis dans les paragraphes 3.1 à 3.2.4, et conçus pour la manutention continue de produits en vrac du (des) point(s) de chargement jusqu'au(x) point(s) de déchargement. Les prescriptions relatives à la compatibilité électromagnétique sont également traitées.
1.2   La présente norme s’applique à une utilisation à des températures ambiantes comprises entre – 15 °C et + 40 °C.
1.3   La présente norme ne couvre pas :
a)   l’utilisation dans les mines de lignite à ciel ouvert, ni l’utilisation dans des sites souterrains tels que des mines ou des tunnels ;
b)   l’utilisation dans des zones publiques ou pour le transport des personnes ;
c)   le matériel flottant, le matériel de dragage ou le matériel monté sur un bateau ;
d)   les transporteurs requérant un niveau élevé de propreté pour des raisons d’hygiène, par exemple en contact direct avec des produits alimentaires ou pharmaceutiques ;
e)   les transporteurs utilisant une courroie mobile et dont le tapis a une surface autre qu’une surface continue caoutchoutée ou polymère ;
f)   le transport du transporteur lui-même ;
g)   la conception de la structure d’appui qui ne fait pas partie du transporteur (voir 3.2) ;
h)   les effets du vent ;
i)   les risques dus à la manutention de produits dangereux spécifiques (par exemple explosifs, matériau irradiant) ;
j)   les risques résultant du contact ou de l’inhalation de fluides, gaz, brouillards, fumées ou poussières nocifs ;
k)   les risques biologiques et microbiologiques (virus ou bactéries) ;
l)   les risques dus à la chaleur rayonnée par les produits manutentionnés ;
m)   risques dus à un fonctionnement dans des champs électromagnétiques ne relevant pas du domaine d’application de l’EN 61000-6-2:1999 ;

Naprave in sistemi za kontinuirni transport - Varnostne zahteve in zahteve za elektromagnetno združljivost naprav, sistemov in opreme za kontinuirni transport sipkih materialov na nepomičnih ogrodjih (vključno z dopolnilom A1)

Ta evropski standard obravnava tehnične zahteve, da se čim bolj zmanjšajo nevarnosti, navedene v klavzuli 4, ki lahko nastanejo med delovanjem in vzdrževanjem sistemov in naprav za transport na nepomičnih ogrodjih, določenih od točke 3.1 do 3.2.4 in načrtovanih za kontinuirni transport sipkih materialov od točk nakladanja do točk raztovarjanja. Zahteve za elektromagnetno združljivost so prav tako zajete. Ta standard velja za uporabo pri temperaturi zunanjega zraka od –15 °C do +40 °C. Ta standard ne zajema: a) uporabe v dnevnih kopih lignita ali uporabe pod zemljo, kot so rudniki ali tuneli, b) uporabe na javnih območjih ali za prevoz ljudi, c) plavajoče, vlačilne ali na ladjo nameščene naprave, d) naprav, ki zahtevajo visoko stopnjo čistoče iz higienskih razlogov, npr. v neposrednem stiku z živili ali zdravili, e) naprav, ki uporabljajo pomični trak z drugo neprekinjeno površino, kot so guma ali polimeri za prenos medija, f) transporta naprave, g) načrtovanja podporne strukture, ki ni del naprave (glej točko 3.2), h) učinkov vetra, i) nevarnosti, ki nastanejo zaradi ravnanja z nekaterimi nevarnimi materiali (npr. eksplozivi, sevalni material), j) nevarnosti, ki so posledica stika ali vdihavanja škodljivih tekočin, plinov, meglic ali prahu, k) biološke in mikrobiološke (virusne ali bakterijske) nevarnosti, l) nevarnosti zaradi sevanja toplote iz materialov, s katerimi se ravna, m) nevarnosti, ki jih povzroča delovanje v elektromagnetnih poljih zunaj razpona iz EN 61000-6-2:1999, n) nevarnosti, ki jih povzroča delovanje, ki je predmet posebnih predpisov (npr. eksplozivne atmosfere), o) nevarnosti, ki jih povzroča hrup, p) nevarnosti, ki jih povzroča uporaba virov ioniziranega sevanja, q) nevarnosti, ki jih povzroča hidravlična oprema. Varnostne zahteve tega standarda veljajo za naprave in sisteme, dane na trg po datumu objave tega standarda.

General Information

Status
Withdrawn
Publication Date
13-Mar-2011
Withdrawal Date
07-Nov-2021
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
26-Oct-2021
Due Date
18-Nov-2021
Completion Date
08-Nov-2021

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SLOVENSKI STANDARD
SIST EN 620:2003+A1:2011
01-april-2011
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SIST EN 620:2003
1DSUDYHLQVLVWHPL]DNRQWLQXLUQLWUDQVSRUW9DUQRVWQH]DKWHYHLQ]DKWHYH]D
HOHNWURPDJQHWQR]GUXåOMLYRVWQDSUDYVLVWHPRYLQRSUHPH]DNRQWLQXLUQLWUDQVSRUW
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Continuous handling equipment and systems - Safety and EMC requirements for fixed

belt conveyors for bulk materials
Stetigförderer und Systeme - Sicherheits- und EMW- Anforderungen für ortsfeste
Gurtförderer für Schüttgutt

Equipements et systèmes de manutention continue - Prescriptions de sécurité et de

CEM pour les transporteurs à courroie fixes pour produits en vrac
Ta slovenski standard je istoveten z: EN 620:2002+A1:2010
ICS:
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
53.040.10 Transporterji Conveyors
SIST EN 620:2003+A1:2011 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 620:2003+A1:2011
---------------------- Page: 2 ----------------------
SIST EN 620:2003+A1:2011
EUROPEAN STANDARD
EN 620:2002+A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2010
ICS 53.040.10 Supersedes EN 620:2002
English Version
Continuous handling equipment and systems - Safety and EMC
requirements for fixed belt conveyors for bulk materials

Equipements et systèmes de manutention continue - Stetigförderer und Systeme - Sicherheits- und EMW-

Prescriptions de sécurité et de CEM pour les transporteurs Anforderungen für ortsfeste Gurtförderer für Schüttgutt

à courroie fixes pour produits en vrac

This European Standard was approved by CEN on 16 november 2001 and includes Amendment 1 approved by CEN on 9 November 2010.

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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 620:2002+A1:2010: E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 620:2003+A1:2011
EN 620:2002+A1:2010 (E)
Contents
page

Foreword ...................................................................................................................................................................... 3

Introduction ................................................................................................................................................................. 4

1 Scope .............................................................................................................................................................. 5

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 8

4 List of hazards .............................................................................................................................................. 12

4.1 Mechanical hazards ..................................................................................................................................... 12

4.2 Electrical hazards ........................................................................................................................................ 14

4.3 Thermal hazards .......................................................................................................................................... 14

4.4 Hazards due to electromagnetic radiation ................................................................................................ 14

4.5 Fire or explosion hazards ........................................................................................................................... 15

4.6 Hazards generated by neglected ergonomic principals in machine design ......................................... 15

4.7 Hazards arising from failure of energy supply and other functional disorders .................................... 15

4.8 Hazards arising during inspection, maintenance and cleaning ............................................................. 15

5 Safety and EMC requirements and/or measures ...................................................................................... 16

5.1 Measures for protection against mechanical hazards ............................................................................. 16

5.2 Measures for protection against electrical hazards ................................................................................. 36

5.3 Measures for protection against thermal hazards ................................................................................... 37

5.4 Electromagnetic compatibility (EMC) ........................................................................................................ 38

5.5 Measures for protection against fire and explosion hazards due to the materials conveyed ............ 39

5.6 Measures for protection against hazards generated by neglected ergonomic principles in

machine design (mismatch of machinery with human characteristics and abilities) .......................... 39

5.7 Measures for protection against hazards caused by failure of energy supply, and other

functional disorders .................................................................................................................................... 39

5.8 Measures for protection against hazards arising during inspection, maintenance and cleaning ...... 42

6 Verification of safety and EMC requirements and/or measures ............................................................. 43

7 Information for use ...................................................................................................................................... 46

7.1 Instruction handbook .................................................................................................................................. 46

7.2 Marking ......................................................................................................................................................... 49

Annex A (normative) Fire or explosion hazard ...................................................................................................... 50

Annex ZA (informative) !!!!Relationship between this European Standard and the Essential

Requirements of the EU Directive 2006/42/EC"""" .................................................................................... 52

Annex ZB (informative) !!!!Coverage of Essential Requirements of EU Directives""""...................................... 54

Bibliography .............................................................................................................................................................. 55

---------------------- Page: 4 ----------------------
SIST EN 620:2003+A1:2011
EN 620:2002+A1:2010 (E)
Foreword

This document (EN 620:2002+A1:2010) has been prepared by Technical Committee CEN /TC 148, "Continuous

handling equipment and systems - Safety", 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 June 2011, and conflicting national standards shall be withdrawn at the latest by

June 2011.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights.

CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

This document includes Amendment 1, approved by CEN on 2010-11-09.
This document supersedes EN 620:2002.

The start and finish of text introduced or altered by amendment is indicated in the text by tags ! ".

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 Annexes ZA and ZB, which are integral parts of this

document."

This !standard" forms part of a series of five !standards" the titles of which are given below:

 EN 617 "Continuous handling equipment and systems — Safety and EMC requirements for the equipment for

the storage of bulk materials in silos, bunkers, bins and hoppers" ;

 EN 618 "Continuous handling equipment and systems — Safety and EMC requirements for equipment for

mechanical handling of bulk materials except fixed belt conveyors” ;

 !EN 619" ”Continuous handling equipment and systems — Safety and EMC requirements for equipment

for mechanical handling of unit loads” ;

 EN 620 "Continuous handling equipment and systems — Safety and EMC requirements for fixed belt con-

veyors for bulk material” ;

 EN 741 "Continuous handling equipment and systems — Safety requirements for systems and their

components for pneumatic handling of bulk materials”.
!deleted text"

According to the CEN/CENELEC Internal Regulations, the national standards organizations 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, Romania, Slovakia, Slovenia, Spain, Sweden,

Switzerland and United Kingdom.
---------------------- Page: 5 ----------------------
SIST EN 620:2003+A1:2011
EN 620:2002+A1:2010 (E)
Introduction
This European Standard is a type C Standard as stated in EN 1070:1998.

The products concerned and the extent to which hazards are covered are indicated in the scope of this standard.

While producing this standard it was assumed that:

 negotiations occur between the manufacturer and the purchaser concerning particular conditions for the use

and places of use for the machinery related to health and safety;
 only suitably trained persons will operate this machinery;

 the machinery will be kept in good repair and working order, in accordance with the manufacturer's

instructions, to retain specified health and safety characteristics throughout its working life;

 the place of installation is adequately lit.
 the place of installation will allow safe use of the machinery;

 by design of the load bearing elements, the safe operation of the system and components is assured for

loading ranging from zero to 100 % of the rated capacities and during testing;
 all parts of the machinery without specific requirements, will be:

a) made from materials of adequate strength and durability and of suitable quality for their intended purpose;

b) of sound mechanical construction;

c) designed in accordance with the usual engineering practice and engineering codes, taking account of all

failure modes and incorporating appropriate safety factors.

EN 617, EN 618 and EN 741 need to be considered for a complete continuous handling system (machine).

---------------------- Page: 6 ----------------------
SIST EN 620:2003+A1:2011
EN 620:2002+A1:2010 (E)
1 Scope

1.1 This European standard deals with the technical requirements to minimise the risks due to the hazards listed

in clause 4, which can arise during operation and maintenance of fixed belt conveyors and systems as defined

in 3.1 to 3.2.4 and designed for continuously conveying loose bulk materials from the loading point(s) to the

unloading point(s). Requirements for electromagnetic compatibility are also covered.

1.2 This standard applies to use in ambient air temperatures of -15° C to + 40° C.

1.3 This standard does not cover:

a) use in open cast lignite mining or use underground, such as in mines or tunnels;

b) use in public areas or for man-riding;
c) floating, dredging and ship mounted equipment;

d) conveyors requiring a high level of cleanliness for hygiene reasons, e.g. in direct contact with foodstuffs or

pharmaceuticals;

e) conveyors using a moving belt with other than a continuous rubber or polymeric surface for the conveying

medium;
f) transportation of the conveyor;

g) the design of the supporting structure which is not part of a conveyor (see 3.2);

h) the effects of wind;

i) hazards resulting from handling specific hazardous materials, (e.g. explosives, radiating material);

j) hazards resulting from contact with or inhalation of harmful fluids, gases, mists, fumes or dust;

k) biological and micro-biological (viral or bacterial) hazards;
l) hazards due to heat radiation from the materials handled;

m) hazards caused by operation in electromagnetic fields outside the range of EN 61000-6-2:1999;

n) hazards caused by operation subject to special regulations (e.g. explosive atmospheres);

o) hazards caused by noise;
p) hazards caused by the use of ionising radiation sources;
q) hazards caused by hydraulic equipment.

The safety requirements of this standard apply to equipment and systems placed on the market after the date of

publication of this standard.

NOTE Directive 94/9/EC concerning equipment and protective systems intended for use in potentially

explosive atmospheres can be applicable to the type of machine or equipment covered by this European

Standard. The present standard is not intended to provide means of complying with the essential health and

safety requirements of Directive 94/9/EC.
---------------------- Page: 7 ----------------------
SIST EN 620:2003+A1:2011
EN 620:2002+A1:2010 (E)
2 Normative references

The following referenced documents are indispensable for the application 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.
!deleted text"

EN 294:1992, Safety of machinery — Safety distances to prevent danger zones being reached by the upper limbs

EN 349:1993, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body

EN 418:1992, Safety of machinery — Emergency stop equipment — Functional aspects — Principles for design

EN 457:1992, Safety of machinery — Auditory danger signals — General requirements — Design and testing (ISO

7731:1986, modified)

EN 563:1994, Safety of machinery — Temperatures of touchable surfaces — Ergonomics data to establish

temperature limit values for hot surfaces

EN 574:1996, Safety of machinery — Two-hand control devices — Functional aspects — Principles for design

EN 614-1:1995, Safety of machinery — Ergonomic design principles — Part 1: Terminology and general principles

!EN 617", Continuous handling equipment and systems — Safety and EMC requirements for the equipment

for the storage of bulk materials in silos, bunkers, bins and hoppers

!EN 618", Continuous handling equipment and systems — Safety and EMC requirements for equipment for

mechanical handling of bulk material except fixed belt conveyors

!EN 619", Continuous handling equipment and systems — Safety and EMC requirements for equipment for

mechanical handling of unit loads

!EN 741", Continuous handling equipment and systems — Safety requirements for systems and their

components for pneumatic handling of bulk materials

EN 811:1996, Safety of machinery — Safety distances to prevent danger zones being reached by the lower limbs

EN 842:1996, Safety of machinery — Visual danger signals — General requirements — Design and testing

EN 953:1997, Safety of machinery — Guards — General requirements for the design and construction of fixed and

movable guards

EN 954-1:1996, Safety of machinery — Safety related parts of control systems — Part 1: General principles for

design

EN 1005-1:2001, Safety of machinery — Human physical performance — Part 1: Terms and Definitions

!EN 1005-2, Safety of machinery — Human physical performance — Part 2: Manual handling of machinery and

component parts of machinery"

EN 1005-3:2002, Safety of machinery — Human physical performance — Part 3: Recommended force limits for

machinery operation
EN 1037:1995, Safety of machinery — Prevention of unexpected start-up
EN 1050:1996, Safety of Machinery — Principles for Risk Assessment
EN 1070:1998, Safety of machinery — Terminology

EN 1088:1995, Safety of machinery — Interlocking devices associated with guards — Principles for design and

selection
---------------------- Page: 8 ----------------------
SIST EN 620:2003+A1:2011
EN 620:2002+A1:2010 (E)

EN 1127-1:1997, Explosive Atmospheres — Explosion prevention and protection — Part 1: Basic concepts and

methodology

EN 1760-2:2001, Safety of machinery — Pressure sensitive protective devices — Part 2: General principles for the

design and testing of pressure sensitive edges and pressure sensitive bars

!EN ISO 12100-1, Safety of machinery — Basic concepts, general principles for design — Part 1: Basic

terminology, methodology (ISO 12100-1:2003)"

!EN ISO 12100-2:2003, Safety of machinery — Basic concepts, general principles for design — Part 2:

Technical principles (ISO 12100-2:2003)"

EN ISO 12150-1:2000, Glass in building — Thermally toughened soda lime silicate safety glass — Part 1:

Definition and description

EN ISO 14122-1:2001, Safety of machinery — Permanent means of access to machines and industrial plants —

Part 1: Choice of fixed means of access between two levels

EN ISO 14122-2:2001, Safety of machinery — Permanent means of access to machines and industrial plants —

Part 2: Working platforms and gangways

EN ISO 14122-3:2001, Safety of machinery — Permanent means of access to machines and industrial plants —

Part 3: Stairways, Stepladders and guard-rails

!EN ISO 14122-4, Safety of machinery — Permanent means of access to machinery — Part 4: Fixed ladders

(ISO 14122-4:2004)"

EN ISO 12543:1998, Glass in building — Laminated glass and laminated safety glass

EN 13202:2000, Ergonomics of the thermal environment — Temperatures of touchable hot surfaces — Guidance

for establishing surface temperature limit values in production standards with the aid of EN 563

EN 50081-1:1992, Electromagnetic compatibility — Generic emission standard — Part 1: Residential, commercial

and light industry

EN 61000-6-2:1999, Electromagnetic compatibility (EMC) — Part 6-2: Generic standards — Immunity for industrial

environments (IEC 61000-6-2:1999)

EN 60204-1:1997, Safety of machinery — Electrical equipment of machines — Part 1: Specification for general

requirements (IEC 60204-1:1997)

!EN 60204-11:2000, Safety of machinery — Electrical equipment of machines — Part 11: Requirements for HV

equipment for voltages above 1000 V a.c. or 1500 V d.c. and not exceeding 36 kV (IEC 60204-11:2000)"

EN 60529:1991, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)

EN 60947-5-1:1997, Low-voltage switchgear and controlgear — Part 5-1: Control circuit devices and switching

elements — Electromechanical control circuit devices (IEC 60947-5-1:1997)

EN 61310-1:1995, Safety of machinery — Indication, marking and actuation — Part 1: Requirements for visual,

auditory and tactile signals (IEC 61310-1:1995)

EN 61496-1:1997, Safety of machinery — Electro-sensitive protective equipment — Part 1: General requirements

and tests (IEC 61496-1:1997)
ISO 2148:1974, Continuous handling equipment — Nomenclature

ISO 6184-1:1985, Explosion protection systems — Part 1: Determination of explosion indices of combustible dust

in air

IEC 61241-1-1:1999. Electrical apparatus for use in the presence of combusible dust — Part 1: Electrical apparatus

protected by enclosures and surface temperature limitation — Specification for apparatus

---------------------- Page: 9 ----------------------
SIST EN 620:2003+A1:2011
EN 620:2002+A1:2010 (E)

CENELEC Report No. R044-001:1999, Safety of machinery — Guidance and recommendations for the avoidance

of hazards due to static electricity
3 Terms and definitions

For the purposes of this European standard, the terms and definitions stated in EN 1070:1998 apply in addition to

those below. Additional terminology for conveyors is given in ISO 2148:1974.
3.1
conveyor system
number of linked conveyors with their ancillary equipment
3.2
belt conveyor

conveyor including its structural components, using a moving belt with a continuous rubber or polymeric surface for

the conveying medium. The belt is usually driven by a pulley at one end, passing over a free-running pulley at the

other end. The upper portion of the belt may be supported by free-running idlers or suitable flat surfaces. The

conveyor may be arranged for horizontal or inclined travel, the angle of slope depending on the character of the

goods conveyed and the type of belt
3.2.1
troughed belt conveyor

belt conveyor where the belt is supported on horizontal centre rollers and inclined side rollers which impart a

transverse curvature to the belt
3.2.2
walled belt conveyor

belt conveyor where the belt has its flat carrying face extended to form side walls of limited height

3.2.3
radial conveyor

belt conveyor which is pivoted at one end and may be mounted on wheels or skids at a point along its length, which

permits movement in a horizontal arc
3.2.4
belt feeder

shortened form of belt conveyor, normally running at slow speed, designed to extract or control the rate of flow of

bulk materials from hoppers
---------------------- Page: 10 ----------------------
SIST EN 620:2003+A1:2011
EN 620:2002+A1:2010 (E)
3.3 Ancillary equipment
3.3.1
feed hopper
collecting device at the loading point of the conveyor for receiving material
3.3.2
tripper

device usually comprising two or more pulleys, mounted either in a fixed position or on a travelling carriage, for

discharging material at selected points or at any point along the length of a belt conveyor

3.3.3
chute

straight or curved, open topped or enclosed, smooth trough by which materials are directed and fall under gravity

3.4 Other terms and definitions
3.4.1
skirt plate

extension to the feed hopper or independent plate along the length of the conveyor for centralising and/or retaining

material on the belt
3.4.2
take-up device
device for taking up slack and applying tension to the belt
3.4.3
gravity take-up device
vertical weight operated (automatic) take-up device
3.4.4
scraper

cleaning device fixed or flexibly mounted across the width of a belt or pulley of a conveyor, for removing adherent

material
3.4.5
troughing idlers
idler set which supports the belt and maintains it in a troughed form
3.4.6
transition idlers

idler sets supporting the belt over the transition distance. The geometry of the idlers may vary over the transition

distance to give the change from the troughed profile to flat
3.4.7
carrying idler
idler which supports the load carrying side of the belt
3.4.8
return idler
idler which supports the return (empty) side of the belt
3.4.9
drive pulley
pulley that drives the belt
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EN 620:2002+A1:2010 (E)
3.4.10
snub pulley

pulley used to develop the necessary arc of contact (angle of wrap) of the belt on the drive pulley

3.4.11
bend pulley
pulley used to change the direction of the belt
3.4.12
head pulley
terminal pulley at the head of a conveyor
3.4.13
take-up pulley
moving pulley used in the take-up device
3.4.14
tail pulley
terminal pulley at the tail of a conveyor. This may be a take-up pulley
3.4.15
fixed enclosing guard
fixed guard which prevents access to a danger zone from all sides
3.4.16
fixed distance guard

fixed guard which does not completely enclose a danger zone, but which prevents or reduces access by virtue of

its dimensions and its distance from the danger zone e.g. perimeter fence or tunnel guard

3.4.17
nip guard
fixed guard inserted at a nip point to directly safeguard that point
3.4.18
nip point

dangerous point which occurs on the in-running side at the line of contact between the conveyor belt and rotating

pulley and in certain cases between belt and an idler roller or a fixed part (see Figure 1)

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SIST EN 620:2003+A1:2011
EN 620:2002+A1:2010 (E)
1 3 4
Key
1 Feed hopper 9 Tail pulley
2 Idlers at convex curve (brow) position 10 Tripper discharge pulley
3 Direction of belt travel 11 Take up pulley
4 Transition idler 12 Gravity take-up weight
5 Head pulley 13 Bend pulley
6 Snub pulley 14 Typical tripper
7 Scraper 15 Reversible belt
8 Drive pulley 16 Nip point
Figure 1 – Typical nip points
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SIST EN 620:2003+A1:2011
EN 620:2002+A1:2010 (E)
3.4.19
transition section

section of a troughed belt conveyor at the head, tail or at an intermediate discharge pulley, where the belt profile

changes between a troughed form and a flat form
3.4.20
transition distance
length of the conveyor occupied by the transition section
3.4.21
head of conveyor
discharge end of the conveyor
3.4.22
tail of conveyor
loading end of the conveyor
3.4.23
working area

area as intended by the manufacturer, where persons work at, or operate conveyors under normal conditions

(inspection, maintenance and cleaning are excluded)
3.4.24
traffic area

area as intended by the manufacturer, which is accessible or reachable by all persons without opening a guard,

activating a trip device or using additional means
4 List of hazards

This clause contains all the significant hazards 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.

Clause 5 deals with these hazards in the same order.

NOTE The hazards described below usually occur in combination. e.g. crushing, shearing and drawing-in.

4.1 Mechanical hazards
4.1.1 General

Mechanical hazards exist if people may sustain physical injury by direct contact with moving machinery, or

indirectly sustain physical injury by being struck by parts of failed machinery or the materials being conveyed or

discharged.
4.1.2 Crushing and shearing hazards

Fixed conveyors may include a part moving in a vertical or horizontal plane and may be actuated manually or by

power.
Crushing and shearing hazards may be caused by e.g. :
 moving parts passing obstructions at gangways or passageways ;

 articulated or mobile parts, if movement of the belt continues when power is removed ;

 overtravel. e.g. lowering, lifting or travelling ;
 counterweight tension devices.
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EN 620:2002+A1:2010 (E)
4.1.3 Cutting or severing hazards
Cutting or severing hazards may be caused by e.g. :
 unprotected sharp edges ;
 corners or rough surfaces ;
 material conveyed ;
 broken window glass in the operators cabin.
4.1.4 Entanglement, drawing-in or trapping hazards

Entanglement, drawing-in and trapping hazards may occur in the following locations e.g. :

 at nip points where the belt wraps around pulleys (see Figure 1) such as :
 drive pulleys and snub pulleys ;
 head pulleys and tail pulleys ;
 take-up pulleys ;
 tripper discharge pulleys and bend pulleys.

 at nip points where the lifting of the belt at carrying and return idlers may be restricted by means other than the

load (see Figure 1) such as :
 at convex curves ;
 beneath feed hoppers and skirt plates ;
 at scrapers or other cleaning devices ;

 around transmission parts e.g. gears, couplings, belt drives and chain drives ;

 between conveyed material and fixed components of the conveyor.
4.1.5 Hazards arising from ejection of parts (of machinery or handled materials)

Hazards may arise from the ejection of machinery parts or from the ejection of the materials being conveyed e.g. :

 parts of machinery fitted above working and traffic areas ;
 failure of the conveying belt ;
 due to spillage or falling of conveyed material ;
 the sliding or collapse of conveyed materials ;
 when freeing jammed or blocked conveyed materials.
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SIST EN 620:2003+A1:2011
EN 620:2002+A1:2010 (E)
4.1.6 Slip, trip and fall hazards
Slip, trip and fall hazards may arise e.g. :
 under the conveyor in traffic areas ;
 around the term
...

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