SIST EN 618:2003
(Main)Continuous handling equipment and systems - Safety and EMC requirements for equipment for mechanical handling of bulk materials except fixed belt conveyors
Continuous handling equipment and systems - Safety and EMC requirements for equipment for mechanical handling of bulk materials except fixed belt conveyors
This standard is applicable to continuously-operating equipment and systems designed for the mechanical handling of bulk materials only, including mobile machines. This standard relates to the following groups of equipment. - Fixed equipment, such as belt, apron, screw "en masse" conveyors and feeders, bucket elevators, for instance. Horizontal rotary feeders with paddlers, vibrating, reciprocating, rotary drum, rotary vane, rotary table conveyors and feeders are also covered.
Stetigförderer und Systeme - Sicherheits- und EMV- Anforderungen an mechanische Fördereinrichtungen für Schüttgut ausgenommen ortsfeste Gurtförder
1.1 Diese Norm behandelt die technischen Anforderungen, um die in Abschnitt 4 aufgeführten Gefährdungen zu minimieren. Diese Gefährdungen können während des Betriebs und der Wartung von in Abschnitt 3.1 bis 3.3 definierten Stetigförderern, die für die Förderung von Schüttgut von der(den) Be- zu der(den) Entladestelle(n) konstruiert wurden, entstehen. Im Allgemeinen gilt sie auch für Einrichtungen, die in Maschinen eingebaut oder an Maschinen angebracht werden. Diese Norm behandelt die technischen Anforderungen an die elektromagnetische Verträglichkeit.
1.2 Diese Norm gilt nicht für:
3 Stetigförderer und Systeme im Braunkohletagebau,
3 Stetigförderer und Systeme im untertägigen Bergbau,
3 Tunnelgrabmaschinen und schürfende Maschinen,
3 Bearbeitungs- oder Sortiermaschinen für Schüttgut, wie z. B. Schleifmaschinen, Brechermühlen, Sichter,
3 ortsfeste Gurtförderer für Schüttgut; diese werden in der Norm EN 620:2001 behandelt,
3 ortsfeste pneumatische Stetigförderer; diese Einrichtungen und Systeme werden in der Norm EN 741 behan-delt,
3 die Schnittstelle zwischen der in dieser Norm behandelten Maschine und einem stationären Gurt- oder pneu-ma-tischen Förderer.
1.3 Diese Norm gibt keine zusätzlichen Anforderungen für:
a) den Gebrauch in der Öffentlichkeit und die Personenbeförderung;
b) schwimmende, unter Wasser baggernde und auf Schiffen montierte Einrichtungen;
c) Stetigförderer, die ein hohes Reinheitsniveau aus hygienischen Gründen erfordern, z. B. in direktem Kontakt mit Nahrungs- und Arzneimitteln;
d) den Transport der Einrichtung;
Equipements et systemes de manutention continue - Prescriptions de sécurité et de CEM pour les équipements de manutention mécanique des produits en vrac a l'exception des transporteurs fixes a courroie
Cette norme est applicable aux équipements et systemes de manutention mécanique en continu de produits en vrac seulement, y compris les machines mobiles. Les groupes d'équipements concernés par cette norme sont: - les appareils installés a poste fixe, tels que transporteurs, distributeurs ou extracteurs a courroie, a palettes, a vis, en masse, élévateurs a godets, par exemple. Sont egalement concerés: les distributeurs a pales tournantes, les transporteurs et distributeurs vibrants, a mouvement alternatif, a tambour ou a sole tournante.
Naprave in sistemi za kontinuirni transport - Varnostne zahteve in zahteve za elektromagnetno združljivost naprav, sistemov in opreme za kontinuirni transport sipkih materialov na pomičnih ogrodjih (razen naprav na nepomičnih ogrodjih)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 618:2003
01-maj-2003
1DSUDYHLQVLVWHPL]DNRQWLQXLUQLWUDQVSRUW9DUQRVWQH]DKWHYHLQ]DKWHYH]D
HOHNWURPDJQHWQR]GUXåOMLYRVWQDSUDYVLVWHPRYLQRSUHPH]DNRQWLQXLUQLWUDQVSRUW
VLSNLKPDWHULDORYQDSRPLþQLKRJURGMLK UD]HQQDSUDYQDQHSRPLþQLKRJURGMLK
Continuous handling equipment and systems - Safety and EMC requirements for
equipment for mechanical handling of bulk materials except fixed belt conveyors
Stetigförderer und Systeme - Sicherheits- und EMV- Anforderungen an mechanische
Fördereinrichtungen für Schüttgut ausgenommen ortsfeste Gurtförder
Equipements et systemes de manutention continue - Prescriptions de sécurité et de
CEM pour les équipements de manutention mécanique des produits en vrac a
l'exception des transporteurs fixes a courroie
Ta slovenski standard je istoveten z: EN 618:2002
ICS:
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
53.040.10 Transporterji Conveyors
SIST EN 618:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 618:2003
EUROPEAN STANDARD
EN 618
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2002
ICS 53.040.10
English version
Continuous handling equipment and systems - Safety and EMC
requirements for equipment for mechanical handling of bulk
materials except fixed belt conveyors
Equipements et systèmes de manutention continue - Stetigförderer und Systeme - Sicherheits- und EMV-
Prescriptions de sécurité et de CEM pour les équipements Anforderungen an mechanische Fördereinrichtungen für
de manutention mécanique des produits en vrac à Schüttgut ausgenommen ortsfeste Gurtförder
l'exception des transporteurs fixes à courroie
This European Standard was approved by CEN on 8 March 2001.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 618:2002 E
worldwide for CEN national Members.
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Contents
Foreword.3
Introduction .4
1 Scope.5
2 Normative references.6
3 Terms and definitions .7
4 Hazards.18
5 Safety and EMC requirements and/or measures.18
5.1 Mechanical hazards.18
5.2 Electrical hazards.22
5.3 Safety related to EMC phenomena.23
5.4 Hazards due to lightning.24
5.5 Thermal hazards.24
5.6 Measures for protection against fire and explosion hazards due to materials conveyed.24
5.7 Jamming and blocking of materials conveyed.24
5.8 Local lighting.24
5.9 Mental overload or underload stress etc. .25
5.10 Visibility.25
5.11 Hazards arising from control systems or caused by failure of energy supply, breaking down of
machinery parts and other functional disorders.25
5.12 Hazards arising during inspection, maintenance and cleaning .26
5.13 Specific safety requirements and locations of the risks .27
6 Verification of safety requirements and/or measures.49
6.1 General.49
6.2 Special verification.51
7 Information for use - Instruction handbook.51
7.1 Instruction handbook.51
7.2 Marking.55
8 Electromagnetic compatibility (EMC) .56
Annex A (normative) List of significant hazards .57
Annex B (informative) Fire or explosion hazard.63
Annex ZA (informative) Relationship of this document with EC Directives.65
Annex ZB (informative) Clauses of this European Standard which address Principal Protection
Requirements of the EU Electro-magnetic compatibility Directive 89/336/EEC .66
Bibliography .67
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Foreword
This document (EN 618:2002) has been prepared by Technical Committee CEN /TC 148, "Continuous handling
equipment and systems", 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 October 2002, and conflicting national standards shall be withdrawn at the latest
by October 2002.
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 and ZB, which is an integral part of this document.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,
Sweden, Switzerland and the United Kingdom.
Within the framework of its programme of work, CEN/TC 148 requested the working group 3 ” Safety requirements
for continuous mechanical handling equipment for bulk materials excluding fixed belt conveyors" to prepare the
following standard :
EN 618, Continuous handling equipment and systems - Safety and EMC requirements for equipment for
mechanical handling of bulk materials except fixed belt conveyors
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 equipment for the
storage of bulk materials in silos, bunkers, bins and hoppers.
EN 618, Continuous handling equipment and systems – Safety EMC requirements for equipment for mechanical
handling of bulk materials except fixed belt conveyors
prEN 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 conveyors for
bulk materials.
EN 741, Continuous handling equipment and systems - Safety requirements for systems and their components for
pneumatic handling of bulk materials.
The annex A is normative, and the annexes B, ZA and ZB are informative.
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Introduction
This European standard is a "Type C" standard as defined in EN 1070.
The equipment concerned and the extent to which hazards are covered are indicated in the scope of this standard.
EN 617, EN 620 and EN 741 need to be considered for a complete continuous handling system (machine).
While producing this standard, it was assumed that :
only suitably trained persons will operate the equipment ;
all parts of the equipment without specific requirements in this standard are :
designed in accordance with the usual engineering practice and calculation codes (e.g. for mobile
equipment FEM 2 131/2 132 or ISO 5049-1, .) including all failure modes ;
made of materials of adequate strength and of quality for their intended purpose taking into account all
failure modes using recognised design methods and appropriate safety factors ;
harmful materials, such as asbestos, are not used as part of the machine ;
components 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 ;
by design of the load bearing elements, a safe operation of the equipment is assured for loading ranging from
zero to 100 % of the rated capacity ;
1)
negotiations occur between the manufacturer and the user concerning materials characteristics (see Note 1)
and particular conditions for the use and places of use for the machinery related to health and safety ;
the place of installation is adequately lit.
NOTE 1 For the description of bulk materials, reference can be made to documents FEM 2 581/2 582 and ISO 3435.
When provisions of this type C standard are different from those which are stated in type A or B standards the
provisions of this type C standard take precedence over the provisions of other standards, for equipment that have
been designed and built according to the provisions of this type C standard.
1) “Manufacturer” within the European Union is to be understood as intended in the Machinery Directive.
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1 Scope
1.1 This 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 mechanical handling equipment defined in clauses 3.1 to
3.3 and which are designed for continuously conveying bulk materials from the loading point(s) to the unloading
point(s).In general, it also applies to equipment which are built into machines or attached to machines. This
standard deals with the technical requirements for EMC.
1.2 The standard does not apply to :
continuous handling equipment and systems for open-cast lignite mining ;
continuous handling equipment and systems for underground mining ;
tunnel digging and excavating machines ;
bulk material processing or classification machines such as grinders, crushers, screens ;
fixed belt conveyors for bulk materials. These are covered by the standard EN 620:2002;
fixed pneumatic handling equipment. These equipment and systems are covered by the standard EN 741 ;
the interface between the machinery dealt with in this standard and the fixed belt or pneumatic conveyor.
1.3 This standard does not give the additional requirements for :
a) use in public areas or for the transportation of people ;
b) floating, dredging and ship mounted equipment ;
c) conveyors requiring a high level of cleanliness for hygiene reasons, e.g. in direct contact with foodstuffs or
pharmaceuticals ;
d) transportation of the equipment ;
e) hazards caused by vibration ;
f) use in ambient air temperature below – 20 °C and above + 40 °C ;
g) the effects of wind on strength and stability ;
h) hazards resulting from handling specific hazardous materials, (e.g. Explosives, radiating material) ;
i) hazards resulting from contact with or inhalation of harmful fluids, gas, mists, fumes and dusts ;
j) biological and micro-biological (viral or bacterial) hazards ;
k) hazards due to heat radiation from the materials handled ;
l) hazards caused by operation in electromagnetic fields outside the range of EN 61000-6-2 ;
m) hazards caused by operation subject to special regulations (e.g. explosive atmospheres) ;
n) hazards caused by noise ;
o) hazards caused by the use of ionising radiation sources (e.g. measurement equipment) ;
p) hazards caused by hydraulic equipment ;
q) hazards caused by inadequate controls cabins lighting ;
r) the risk related to elevating of the control stations ;
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s) hazards related to contact with or inhalation of harmful fluids, gases, mists, fums and dusts.
1.4 The safety requirements apply to equipment and systems placed on the market after the date of publication
of this standard.
NOTE 1 The requirements of this standard can be used for comparable machines outside the scope of this standard with the
same risks.
NOTE 2 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.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These
normative references are cited at the appropriate places in the text and the publications are listed hereafter. For
dated references, subsequent amendments to or revisions of any of these publications apply to this European
Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN 292-1:1991, Safety of machinery - Basic concept - General principles for design - Part 1 : Basic terminology –
Methodology.
EN 292-2:1991, Safety of machinery - Basic concept - General principles for design - Part 2 : Technical principles
and specifications.
EN 292-2/A1:1995, Safety of machinery - Basic concept - General principles for design - Part2 : Technical
principles and specifications.
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 563:1994, Safety of machinery - Temperatures of touchable surfaces.
EN 617, Continuous handling equipment and systems – Safety and EMC requirements for storage of bulk
materials in silos, bunkers, bins and hoppers.
EN 620:2002, Continuous handling equipment and systems – Safety and EMC requirements for fixed belt
conveyors for bulk material.
EN 741:2000, 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 zone being reached by the lower limbs.
EN 953:1997, Safety of machinery - General requirements for the design and construction of guards (fixed,
movable).
EN 954-1:1997, Safety of machinery - Safety related parts of control systems - Part 1 : General principles for
design.
EN 1037:1995, Safety of machinery - Prevention of unexpected start-up.
EN 1070:1998, Safety of machinery – Terminology.
EN 1088:1995, Safety of machinery - Interlocking devices associated with guards - Principles for design and
selection.
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EN 1127-1:1997, Safety of machinery - Fire and explosion - Part 1 : Explosion prevention and protection.
EN 12150-1:2000, Glass in building - Thermally toughened soda lime silicate safety glass - Part 1 : Definition and
descriptionprEN 13586:1999, Cranes – Access.
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 13586:1999, Cranes. Access
EN 26184-1:1991, Explosion protection systems – Part 1 : Determination of explosion indices of combustibles
dusts in air (ISO 6184-1:1985).
EN 50081-1:1992, Electromagnetic compatibility - Generic emission standard - Part 1 : Residential commercial and
light industry.
EN 60204-1:1997, Safety of machinery - Electrical equipment of machines - Part 1 : Specification for requirements.
prEN 60204-11:1998, Safety of machinery - Electrical equipment of machines - Part 11 : General requirements for
high voltage above 1 000 V a;c; or 1 500 V d.c. and not exceeding 36 kV.
EN 60947-5-1:1991, Low voltage switch gear and control gear - Part 5 : Control circuit devices and switching
elements - Section 1 : Electromechanical control circuit devices.
EN 60529:1991, Degrees of protection provided by enclosures (IP code).
EN 61000-6-2:1999, Electromagnetic compatibilty (EMC) – Part 6-2 : Generic standards – Immunity for industrial
environments (CEI 61000-6-2:1999)
ISO 2148:1974, Continuous handling equipment - Nomenclature - Bilingual edition.
ISO 3435:1977, Continuous mechanical handling equipment - Classification and symbolisation of bulk materials.
ISO 3864:1984, Safety colours and safety signs .
ISO 5049-1:1994, Mobile equipment for continuous handling of bulk materials – Part 1 : Rules for the design of
steel structures.
IEC 61241-1-2:1999, Electrical apparatus for use in the presence of combustible dust - Part 1-2 : Electrical
apparatus protected by enclosures - Selection, installation and maintenance.
3 Terms and definitions
For the purposes of this standard, the terms and definitions stated in EN 1070 and ISO 2148 apply. Additional
terms used in this standard are defined below. For other definitions on components of fixed belt conveyors, see EN
620:2002.
3.1
fixed equipment
3.1.1
scraper conveyor / drag bar feeder :
conveyor for loose bulk materials with as driving medium one or more endless chains equipped with scraper bars
pushing the material in an open trough shaped casing (see Figure 1)
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Figure 1
3.1.2
"en-masse" conveyor
conveyor for loose bulk materials with a chain as the driving medium having attached flights or scraper flights
moving the material "en masse" in an enclosing trough (see Figure 2)
Figure 2
3.1.3
bucket elevator :
elevator for loose bulk materials with buckets as the carrying medium attached to a belt or chains as the driving
medium (see Figure 3)
Figure 3
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3.1.4
screw feeders / conveyors
conveyor for loose bulk materials with a trough or tube as the carrying medium, the material being moved by the
action of a rotating screw. This screw can be rigid or flexible to take curves (see Figure 4)
Figure 4
3.1.5
vibratory conveyor
conveyor for loose bulk materials which consists of a flexibly mounted trough or tube, in which the material moves
under the effect of vibrations (see Figure 5)
Figure 5
3.1.6
rotarydrum, table or vane feeder
continuous volumetric dosing element within a housing consisting of a rotating shaft with several blades which
transport the material from the inlet to the outlet (see Figure 6)
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Figure 6
Figure 6
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3.2
movable equipment
equipment generally intended to be moved only when out of operation (see Figure 7)
Figure 7
3.3
mobile equipment
equipment whose structure is self propelled during normal operation
3.3.1
stacker
mobile equipment on tracks (rails), crawlers or tyres for continuously piling or stacking bulk materials using
unidirectional moving belts mounted on a boom as the final carrying and conveying medium (see Figure 8
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Figure 8
3.3.2
gantry stacker
mobile equipment mounted on a gantry travelling over the bulk material stack and along rail tracks, for continuously
pileling or stacking bulk materials using endless moving belts as the carrying and conveying medium (see Figure 9)
Figure 9
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3.3.3
ship loader
mobile equipment travelling on rails or tyres for continuously loading a ship with bulk materials or bags of bulk
materials (see Figure 10)
Figure 10
3.3.4
bucket-wheel reclaimer
mobile equipment on rails, crawlers or tyres used to reclaim continuously bulk materials, using a bucket wheel at
the end of a boom and endless moving belts as the carrying and conveying medium (see Figure 11)
Figure 11
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3.3.5
ship unloader
mobile equipment travelling on rails or tyres for continuously unloading bulk materials or bags of bulk materials
from ship holds (see Figure 12)
Figure 12
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3.3.6
scraper/reclaimer
mobile equipment travelling on rails for continuously reclaiming bulk materials from a stockpile using an endless
scraper chain (see Figure 13)
Figure 13
3.3.7
bridge reclaimer
mobile equipment mounted on rails for continuously blending/reclaiming bulk materials from a stockpile using a
bucket wheel running along a girder and a belt as the carrying and conveying medium (see Figure 14)
Figure 14
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3.3.8
screw reclaimers
mobile equipment located bellow a stockpile for continuously reclaiming bulk materials using a screw as the
carrying or conveying medium (see Figure 15)
Figure 15
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3.3.9
buckets loader
mobile equipment for continuously reclaiming bulk materials from a stockpile and loading it into trucks or trailers,
using scraping or digging buckets and a feeding screw to feed a belt conveyor which elevates the bulk materials to
the level of the trucks or trailers (see Figure 16)
Figure 16
3.4
working area
area as intended by the manufacturer, where persons work at, or operate equipment under normal conditions
(inspection, maintenance and cleaning are excluded)
3.5
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. This area includes permanent means of access
3.6
mechanical brake
brake applied mechanically by stored energy (e.g. spring force) until released by an external sustained power
supply under the control of the operator or automatically
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3.7
automatically acting mechanical brake
mechanical brake that is automatically applied in the event of :
failure of energy supply in the brake system ;
failure in the brake electrical control circuit(s) ;
failure of energy supply to the drive(= motor).
4 Hazards
This clause contains hazards and hazardous situations, as far as they are dealt with in this European standard,
identified by risk assessment significant for this type of machinery and which require action to eliminate or reduce
risk. Clause 5 deals with these hazards in the same order.
NOTE The hazards listed in annex A usually occur in combination e.g. crushing, shearing and drawing-in.
5 Safety and EMC requirements and/or measures
Equipment and systems shall comply with the safety requirements and/or measures of this clause.
For the application of EN 953, EN 294, EN 811, EN 349, EN 1037, EN 60204-1 and prEN 60204-11 the
manufacturer shall carry out an adequate risk assessment for the requirements thereof where choice is necessary.
NOTE This specific risk assessment is part of the general risk assessment relating to the hazards not covered by this “C”
standard.
Belt conveyor mounted on the equipment shall be in accordance with EN 620:2002 with the exception of double
safe way of escape.
Safety devices shall also be provided to prevent kickback of any manually operated crank.
In addition, the equipment shall be designed according to the principles to EN 292 for hazards relevant but not
significant which are not dealt with by this standard.
NOTE The general safety requirements given in Clauses 5.1 to 5.12 are common to all types of mechanical handling
equipment dealt with by this standard. Clause 5.13 gives the specific safety requirements of some types of mechanical handling
equipment.
5.1 Mechanical hazards
Mechanical hazards shall be safeguarded preferably by guards .
Appropriate safety distances in accordance with Table 1 of EN 349 or Table 2, 3, 4 or 6 of EN 294 and EN 811
and/or hinged or sliding guards, fixed enclosing guards, fixed distance guards or interlocking guards shall be
provided to protect operators from crushing and shearing hazards.
For mobile equipment, visual warning devices such as flashing lamps and/or auditory warning devices shall be
fitted. If the driver cannot see the danger zone, the auditory warning devices shall provide a sound pressure level
15 dB(A) over the threshold of ambient sound pressure level at a height of 1,6 m from the floor at an horizontal
distance of 1m and shall be started 10 s before the start of the movement and provided during 3 s; the visual
warning devices shall operate throughout the equipment operation.
5.1.1 Guard construction
Guards shall be in accordance with EN 953 and may be perforated or imperforated sheet construction. If of
perforated construction, the safety distances to prevent danger areas being reached shall comply with EN 294.
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Where it is intended to step on covers or guards, they shall be able to withstand a force of 1500 N evenly
distributed over an area of 0,2 x 0,2 m, with a deformation less 1 % of any reference dimension and no contact with
moving part. After the loading it shall be possible to replace the guard.
The other guards shall be able to withstand a force of 150 N evenly distributed on an
...
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