EN 1175:2025

SLOVENSKI STANDARD
oSIST prEN 1175:2023
01-april-2023
Nadomešča:
SIST EN 1175:2020
Varnost vozil za talni transport - Električne/elektronske zahteve
Safety of industrial trucks - Electrical/electronic requirements
Sicherheit von Flurförderzeugen - Elektrische/elektronische Anforderungen
Sécurité des chariots de manutention - Prescriptions électriques/électroniques
Ta slovenski standard je istoveten z: prEN 1175
ICS:
53.060 Industrijski tovornjaki Industrial trucks
oSIST prEN 1175:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 1175:2023
oSIST prEN 1175:2023
DRAFT
EUROPEAN STANDARD
prEN 1175
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2023
ICS 53.060 Will supersede EN 1175:2020
English Version
Safety of industrial trucks - Electrical/electronic
requirements
Sécurité des chariots de manutention - Prescriptions Sicherheit von Flurförderzeugen -
électriques/électroniques Elektrische/elektronische Anforderungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 150.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

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. prEN 1175:2023 E
worldwide for CEN national Members.

oSIST prEN 1175:2023
prEN 1175:2023 (E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Requirements . 12
4.1 Introduction . 12
4.2 Validation of safety functions . 12
4.3 General requirements . 12
4.4 Energy sources . 14
4.5 Travel and brake control systems . 16
4.6 Electrical load handling system . 24
4.7 Steering . 27
4.8 Software design . 30
4.9 Other protective measures . 30
4.10 Electrical verifications . 32
5 Additional requirements for high voltage trucks . 34
5.1 General . 34
5.2 Battery . 34
5.3 Protection against electric shock . 35
6 Information for use . 37
6.1 General . 37
6.2 Electrical diagram . 37
6.3 Electrical interface for external systems . 37
6.4 Safety checks . 37
6.5 Capacitors . 37
6.6 Marking . 37
6.7 Non-ionising radiation . 37
6.8 Interoperability of energy sources . 38
Annex A (normative) Connectors for energy sources . 39
A.1 General . 39
A.2 Terms and definitions . 39
A.3 Requirements . 39
A.4 Type-test methods . 41
A.5 Quality assurance . 44
A.6 Information for use . 44
Annex B (normative) Electromagnetic contactors . 45
B.1 General . 45
B.2 Terms and definitions . 45
B.3 Types of contactor . 46
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prEN 1175:2023 (E)
B.4 Product information . 47
B.5 Normal service, mounting and transport conditions . 48
B.6 Constructional and performance requirements . 48
B.7 Tests . 50
B.8 Type test sequences . 57
Annex C (normative) Energy sources . 59
C.1 Lead-acid batteries . 59
C.2 Lithium-ion batteries . 60
Annex D (normative) Electric drive system (motors, converters, generators, energy
sources) . 65
D.1 General . 65
D.2 Special requirements . 65
D.3 Testing . 66
Annex E (normative) Assistance systems . 67
E.1 General . 67
E.2 Requirements . 67
E.3 Information for use . 68
Annex F (informative) Steering systems . 69
F.1 General . 69
F.2 Electric steering without backup . 69
F.3 Electric steering with backup . 69
F.4 Assisted steering systems . 71
Annex G (normative) Electrical components . 73
G.1 Conductors and cables . 73
Annex H (informative) Cross reference with industrial truck types of ISO 5053-1 . 75
Annex I (informative) List of significant hazards . 78
Annex J (informative) Explanations of safety functions . 91
Annex ZA (informative) Relationship between this European Standard and the
essential requirements of Directive 2006/42/EC aimed to be covered . 97
Bibliography . 100

oSIST prEN 1175:2023
prEN 1175:2023 (E)
European foreword
This document (prEN 1175:2023) has been prepared by Technical Committee CEN/TC 150
“Industrial trucks - Safety”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1175:2020.
This document specifies up-to-date requirements for electric/electronic installations of industrial
trucks. Requirements are mainly based on safety functions and not only on safety related parts
and take into account exclusively electric/electronic elements.
The main changes compared to EN 1175:2020 are:
— updating of normative and informative references;
— correction of the specification in transport test for contactors in Annex B.
This document is intended to be used in conjunction with EN ISO 3691 and EN 16307.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of
EU Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an
integral part of this document.
oSIST prEN 1175:2023
prEN 1175:2023 (E)
Introduction
This document is a type-C standard as stated in EN ISO 12100.
This document is of relevance for the following stakeholder groups representing the market
players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);
— health and safety bodies (regulators, accident prevention organizations, market surveillance
etc.).
Others can be affected by the level of machinery safety achieved with the means of the document
by the above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);
— machine users/employees (e.g. trade unions, organizations for people with special needs);
— service providers, e.g. for maintenance (small, medium and large enterprises).
The above-mentioned stakeholder groups have been given the possibility to participate at the
drafting process of this document.
The machinery concerned and the extent to which hazards, hazardous situations or hazardous
events are covered are indicated in the Scope of this document.
When requirements of this type-C standard are different from those which are stated in type-A or
type-B standards, the requirements of this type-C standard take precedence over the
requirements of the other standards for machines that have been designed and built according to
the requirements of this type-C standard.
oSIST prEN 1175:2023
prEN 1175:2023 (E)
1 Scope
This document specifies the electrical requirements for the design and construction of the
electrical installation in self-propelled industrial trucks that are within the scope of
ISO 5053-1:2020, except variable reach trucks as defined in ISO 5053-1:2020, 3.21 and 3.22,
straddle carriers as defined in ISO 5053-1:2020, 3.18 and 3.19, and specific functions, parts
and/or systems utilized for the automatic operation of driverless industrial trucks as defined in
ISO 5053-1:2020, 3.32. It provides the electrical/electronic and safety-related parts of control
system requirements for those self-propelled industrial trucks identified above
NOTE 1 Reference is made to this document in other standards which cover the non-electrical
requirements of the various industrial truck types.
This document deals with safety requirements for all electrical and electronic components of
industrial trucks, including electrically actuated hydraulic/pneumatic valves. It specifies
minimum performance levels required for safety functions realized by safety related parts of
control systems. It is intended to be used to avoid or minimize hazards or hazardous situations
listed in Annex I. These situations can arise during the operation in the area of use for which it is
designed and during maintenance of trucks in accordance with the specifications and instruction
given by the manufacturer.
This document does not deal with hazards which could occur:
a) during construction;
b) when operating in potentially explosive atmospheres;
c) because of malfunction of non-electric safety-related parts of control systems, e.g. hydraulic
and pneumatic elements like pistons, non-electric valves, pumps, etc;
d) when operating outside the range of 30 % to 95 % (not condensing) of relative humidity.
NOTE 2 The level of the defined required performance for electrical safety related control systems can
be used as a guideline to determine the performance of non-electric systems.
NOTE 3 Hazards due to penetration of water and dust are covered by the definition of PL of safety
r
functions, according to EN ISO 13849-1:2015.
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.
ISO 5053-1:2020, Industrial trucks — Vocabulary — Part 1: Types of industrial trucks
EN ISO 13849-1:2015, Safety of machinery — Safety-related parts of control systems — Part 1:
General principles for design (ISO 13849-1:2015)
EN ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and
risk reduction (ISO 12100:2010)
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prEN 1175:2023 (E)
EN ISO 3691-1:2015 , Industrial trucks — Safety requirements and verification — Part 1: Self-
propelled industrial trucks, other than driverless trucks, variable-reach trucks and burden-carrier
trucks (ISO 3691-1:2011, including Cor 1:2013)
EN 16307-1:2020, Industrial trucks — Safety requirements and verification — Part 1:
Supplementary requirements for self-propelled industrial trucks, other than driverless trucks,
variable-reach trucks and burden-carrier trucks
EN ISO 3691-3:2016 , Industrial trucks — Safety requirements and verification — Part 3:
Additional requirements for trucks with elevating operator position and trucks specifically designed
to travel with elevated loads (ISO 3691-3:2016)
EN 60204-1:2018 , Safety of machinery — Electrical equipment of machines — Part 1: General
requirements
EN 12895:2015+A1:2019, Industrial trucks — Electromagnetic compatibility
EN 50565-1:2014, Electric cables — Guide to use for cables with a rated voltage not exceeding
450/750 V (U0/U) — Part 1: General guidance
EN 60034-8:2007 , Rotating electrical machines — Part 8: Terminal markings and direction of
rotation (IEC 60034-8:2007)
EN 60068-2-27:2009, Environmental testing — Part 2-27: Tests — Test Ea and guidance: Shock
(IEC 60068-2-27:2008)
EN 60068-2-6:2008, Environmental testing — Part 2-6: Tests — Test Fc: Vibration (sinusoidal) (IEC
60068-2-6:2007)
EN 60332-1-2:2004 , Tests on electric and optical fibre cables under fire conditions — Part 1-2: Test
for vertical flame propagation for a single insulated wire or cable — Procedure for 1 kW pre-mixed
flame (IEC 60332-1-2:2004)
EN 60384-14:2013 , Fixed capacitors for use in electronic equipment — Part 14: Sectional
specification — Fixed capacitors for electromagnetic interference suppression and connection to the
supply mains (IEC 60384-14:2013)
EN 60529:1991 , Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)
EN IEC 60664-1:2020 , Insulation coordination for equipment within low-voltage systems — Part
1: Principles, requirements and tests (IEC 60664-1:2020)

As impacted by EN ISO 3691-1:2015/A1:2020.
As impacted by EN ISO 3691-3:2016/prA1:202X
As impacted by EN 60204-1:2018/prA1:202X
As impacted by EN 60034-8:2007/A1:2014.
As impacted by EN 60332-1-2:2004/A1:2015, EN 60332-1-2:2004/A11:2016 and EN 60332-1-
2:2004/A12:2020.
As impacted by EN 60384-14:2013/A1:2016 and EN 60384-14:2013/AC:2016.
As impacted by EN 60529:1991/A1:2000, EN 60529:1991/A2:2013, EN 60529:1991/AC:2019-02, EN
60529:1991/AC:2016-12, EN 60529:1991/A2:2013/AC:2019-02.
As impacted by EN IEC 60664-1:2020/AC:2020-12.

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EN 60695-11-10:2013 , Fire hazard testing — Part 11-10: Test flames — 50 W horizontal and
vertical flame test methods (IEC 60695-11-10:2013)
EN IEC 60947-4-1:2019 , Low-voltage switchgear and controlgear — Part 4-1: Contactors and
motor-starters — Electromechanical contactors and motor-starters
EN 60947-5-5:1997 , Low-voltage switchgear and controlgear — Part 5-5: Control circuit devices
and switching elements — Electrical emergency stop device with mechanical latching function (IEC
60947-5-5:1997)
EN 61643-11:2012 , Low-voltage surge protective devices — Part 11: Surge protective devices
connected to low-voltage power systems — Requirements and test methods (IEC 61643-11:2011)
EN IEC 62281:2019 , Safety of primary and secondary lithium cells and batteries during transport
(IEC 62281:2019)
EN 62485-3:2014, Safety requirements for secondary batteries and battery installations — Part 3:
Traction batteries (IEC 62485-3:2014)
EN 62620:2015, Secondary cells and batteries containing alkaline or other non-acid electrolytes —
Secondary lithium cells and batteries for use in industrial applications (IEC 62620:2014)
EN IEC 62619:2022, Secondary cells and batteries containing alkaline or other non-acid electrolytes
— Safety requirements for secondary lithium cells and batteries, for use in industrial applications
(IEC 62619:2022)
EN IEC 62902:2019, Secondary batteries — Marking symbols for identification of their chemistry
(IEC 62902:2019)
EN ISO 6743-4:2015, Lubricants, industrial oils and related products (class L) — Classification —
Part 4: Family H (Hydraulic systems) (ISO 6743-4:2015)
ISO 3287:1999, Powered industrial trucks — Symbols for operator controls and other displays
ISO 7000:2019, Graphical symbols for use on equipment — Registered symbols
IEC 60417:2002 DB, Graphical symbols for use on equipment
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 5053-1:2020 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp/ui

As impacted by EN 60695-11-10:2013/AC:2014.
As impacted by EN IEC 60947-4-1:2019/AC:2020-05 and EN IEC 60947-4-1:2019/AC:2021-04.
As impacted by EN 60947-5-5:1997/A1:2005, EN 60947-5-5:1997/A11:2013 and EN 60947-5-
5:1997/A2: 2017.
As impacted by EN 61643-11:2012/A11:2018.
As impacted by EN IEC 62281:2019/A1:2021 and EN IEC 62281:2019/prA2:2022.
oSIST prEN 1175:2023
prEN 1175:2023 (E)
3.1
U
n
nominal voltage of the truck system
designated value of the voltage of the electrical system and to which its characteristics are
referred
3.2
nominal battery voltage
number of battery cells connected in series multiplied by the nominal cell voltage, relative to the
chemical technology of the cell
Note 1 to entry: If the battery consists of cells connected in series and in parallel, the nominal voltage is
defined by the number of cells, which are arranged in one line of cells connected in series.
3.3
drive system
electrically controlled system moving truck on ground, generating torque with effect on one or
more drive wheels
3.4
low speed
travel speed below 0,4 m/s for pedestrian trucks and below 0,7 m/s for all other types of trucks
3.5
LHS
electrical load handling system
system for electrical or electronically controlled load handling
3.6
electrical steering
electrical or electronic system controlling the angular position of the wheel(s) of the truck with
respect to its vertical longitudinal centre plane
Note 1 to entry: See Annex F for examples.
3.7
assistance system
system intended to improve the operational performance, the ergonomics of industrial trucks, or
to warn the operator about hazards due to improper use in the specific operation related to the
work environment and application
Note 1 to entry: Assistance systems are not necessary for the safe operation of industrial trucks and must
be clearly distinguished from safety functions.
3.8
PL
r
required performance level
performance level (PL) applied to achieve the required risk reduction for each safety function
[SOURCE: EN ISO 13849-1:2015, 3.1.24]
3.9
setpoint
operator's physical actions on the intended control device
Note 1 to entry: For travelling, the actuation of the accelerator control.
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prEN 1175:2023 (E)
3.10
actpoint
actual physical value of the system output
Note 1 to entry: Examples of actpoint are: truck speed, position of truck steered wheel(s) energised
solenoid and the combination of voltage, current and frequency applied to a drive motor.
3.11
service brake
braking system allowing the operator to control, directly or indirectly, the speed of the truck or to
bring the truck to a halt
[SOURCE: ISO 6292:2020, 3.9, modified by substituting “braking system” with “brake” in the
terminological entry]
Note 1 to entry: The service brake can also be activated by the electronic control system of the truck.
Note 2 to entry: The service brake can also serve as a parking brake.
3.12
parking brake
braking system allowing a vehicle to be held stationary mechanically, even on an inclined surface,
particularly in the absence of the operator
[SOURCE: ISO 6292:2020, 3.8, modified by substituting “braking system” with “brake” in the
terminological entry]
3.13
safety function
function of the machine whose failure can result in an immediate increase of the risk(s)
[SOURCE: EN ISO 12100:2010, 3.30]
3.14
risk
combination of the probability of occurrence of harm and the severity of that harm
[SOURCE: EN ISO 12100:2010, 3.12]
3.15
type test
test to the requirements of this document of an example of devices, systems or complete trucks
representative of the production, including the relevant range of options provided by the
manufacturer of the truck, as part of the verification of compliance with this document
3.16
routine test
tests carried out during series production necessary to maintain compliance with this document
3.17
control circuit
electrical circuit used for the control, including monitoring, of the truck and its electrical
equipment
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prEN 1175:2023 (E)
3.18
auxiliary circuit
electrical circuit that controls lights, fans and other accessories
3.19
power circuit
circuit that supplies power from the energy source to units of equipment used for truck operation
3.20
energy source
unit for energizing equipment of the truck used for productive operation
Note 1 to entry: Energy sources for trucks can be:
— batteries based on different technologies;
— liquid or gaseous fuel combined with internal combustion engine or fuel cell;
— AC power sources.
3.21
frame fault
accidental connection of a live part to the truck frame or exposed conductive parts
3.22
IC truck
truck equipped with an internal combustion engine of which the power is transferred to a
mechanical, hydraulic or electrical system
3.23
normal operating position
position in which the operator is able to control all functions for driving and load handling as
defined by the manufacturer
Note 1 to entry: Additional positions are permitted to be defined by the manufacturer if it is not possible
to control all the functions of the truck from a single position. A rotating seat or stand-up end-control truck
with more than one operating direction is considered as being or having a single operating position.
[SOURCE: EN ISO 3691-1:2015, 3.8]
3.24
high voltage truck
is greater than 120 V DC or 50 V AC and less than or equal to 1 500 V DC or
truck whose Un
1 000 V AC under idle or fully charged condition
3.25
OPC
operator-presence control
device that detects the presence of the operator in the normal operating position
3.26
electric powered assisted steering system
mechanical and/or hydraulic steering system powered by an electrical system
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prEN 1175:2023 (E)
4 Requirements
4.1 Introduction
Trucks shall comply with the safety requirements and/or protective measures of this clause. In
addition, the truck shall be designed according to the principles of EN ISO 12100:2010 for
relevant but not significant hazards which are not dealt with by this document.
4.2 Validation of safety functions
The design of safety functions shall be validated in accordance with EN ISO 13849-1:2015,
Clause 8.
4.3 General requirements
4.3.1 Low voltage/high voltage
Safety shall not be compromised at any voltage level that can occur.
Electrical systems of trucks powered by lead-acid batteries shall be designed so that all functions
operate in the voltage range from 70 % up to 120 % of the nominal battery voltage. These limits
shall be adapted to other energy sources technologies by the manufacturer.
NOTE Limits set by the manufacturer for other energy sources are outside the scope of this document.
4.3.2 Frame fault
The electric circuits shall be so designed or protected, that frame faults shall not cause hazardous
inadvertent movements that cannot be corrected or compensated by the operator. Compliance
shall be verified by means of the type test of 4.10.4.
4.3.3 Protection from ingress of water and dust
The electrical installation of the trucks in operating condition shall be designed and constructed
such that the protection from harmful ingress of water and dust is in accordance with the
environmental conditions in which the truck is designed to operate, including reasonably
foreseeable misuses, as defined in the instruction handbook (see EN ISO 3691-1:2015, 6.2.2).
NOTE Standardised degrees of protection provided by the enclosure of the electrical equipment are
given in EN 60529:1991.
4.3.4 Protection against electric shock
Non-insulated live parts of trucks in the operating condition shall be protected to a degree of
IPXXB preventing direct contact. For top surfaces, the minimum degree shall be IPXXD in
accordance with EN 60529:1991.
Access to an electrical enclosure containing uninsulated live parts in excess of nominal voltage
60 V DC or 25 V AC shall be possible only using a tool.
Indirect contact with live parts shall be avoided by electric separation of the protection devices in
accordance with EN 60204-1:2018, 6.3.2.3.
It shall be possible to electrically disconnect the energy sources for maintenance and replacement
operations. An easily accessible switch, connector or disconnectable battery terminals meets the
intent of this requirement.
For energy sources with nominal voltage greater than 60 V DC or 25 V AC live parts shall be
protected against direct contact.
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prEN 1175:2023 (E)
4.3.5 Connection to the frame
4.3.5.1 Battery powered trucks
There shall be no electrical connection to the truck frame, except for:
a) frame fault detection system;
b) electric/electronic circuits with a nominal voltage not greater than 60 V DC which are
galvanically separated from the energy source;
c) connection to the earthing terminal of on-board chargers;
d) suppression capacitors. If the nominal battery voltage exceeds 60 V DC, minimum
requirement for the capacitor shall be Class Y in accordance with EN 60384-14:2013;
e) the screen of shielded cables and components. This condition shall meet the requirements of
the insulation resistance testing in 4.10.2;
f) suppression resistor for ESD reduction, the system shall meet the requirements of 4.10.2.
4.3.5.2 IC trucks
a) Electrical system with nominal voltage not greater than 48 V (starter battery):
— one pole of the electrical system may be connected to the truck frame;
— all conductors not connected to the truck frame shall be effectively insulated and where
necessary protected against thermal and mechanical damage;
— there shall be means to disconnect both poles of the starter battery from the truck for
service purposes;
b) electrical system with nominal voltage greater than 48 V (hybrid drive system):
— electrical systems with nominal voltage greater than 48 V shall be electrically insulated
and galvanically separated from frame, with the exceptions listed in 4.3.5.1 a), b), d), e)
and f);
— control and auxiliary circuits shall have a maximum voltage not greater than 120 V DC or
50 V AC. Where the energy source maximum voltage is greater, control and auxiliary
circuits shall be electrically and galvanically separated from the energy source;
— for maximum voltages greater than 120 V DC and 50 V AC, equipotential bonding shall be
provided between the frame of the vehicle and conductive enclosures, e.g. motor frames.
4.3.6 Protection from residual voltages
After disconnecting energy sources, the voltage of the capacitors in power circuits shall be less
than 60 V DC after 10 s.
If the above condition is not technically achievable or practicable a warning/safety label shall be
provided. This warning label shall be permanent and indelible and shall be affixed on, or in close
to, the enclosure containing the capacitors.
NOTE Safety signs EN ISO 7010:2020 W001 and EN ISO 7010:2020 W012 can be used.
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4.3.7 Overcurrent protection
Power, control and auxiliary circuits shall be provided with overcurrent protection that is sized
to prevent overheating of the smallest size conductor.
Overcurrent protective devices shall be capable of interrupting the maximum fault current
without creating a fire hazard.
Overcurrent protective devices in the control and power circuits shall be as close as practicable
to the energy source. Non-resettable overcurrent protective devices shall be identified according
to the replacement rating of the device.
If the overcurrent protection is realized by electronic systems, e.g. by inverters or DC/DC
as defined in Table 6.
converters, this function shall be in accordance with PLr
Overcurrent protective devices shall be identified, and rating of these devices shall be indicated
on the electrical diagram.
Replaceable overcurrent protective devices shall be provided with rating which shall be located
on the truck, adjacent or close to the device itself.
NOTE For further information regarding location of overcurrent protective devices see
EN 60204-1:2018, 7.2.8 and EN 60204-1:2018, Annex D.
4.3.8 Fire and heat hazards (installation of arcing and sparking parts)
Any arcing part in a power circuit shall be enclosed or installed to adequately reduce the
possibility of flame or molten material causing a risk of fire.
Relevant parts shall be accessible for servicing and inspection.
4.3.9 Sparking or heat dissipating electrical components
Sparking components and components which can reach a temperature of 300 °C or more under
normal operating conditions, shall not be located where potentially explosive gas/air mixtures
can be present. Battery connectors shall be accepted as non-sparking components if they are not
used as an emergency switching-off device.
4.3.10 Electromagnetic radiation
4.3.10.1 Non-ionising radiation
Where trucks are fitted with non-ionising radiation devices related to the operation of the truck,
the radiation shall be minimized with consideration to the influence on persons, in particular with
the effect on active or non-active implantable medical devices by complying with
EN 12895:2015+A1:2019, 4.1, 5.1 and 5.2.
4.3.10.2 External radiation
Operation of trucks shall not be hazardously influenced by external radiation and for that purpose
trucks shall at least comply with EN 12895:2015+A1:2019, 4.2, 5.1 and 5.3.
NOTE For detailed information regarding electromagnetic compatibility refer to
EN 12895:2015+A1:2019.
4.4 Energy sources
4.4.1 General
Energy sources shall conform to Annex C.
Connectors used for connecting energy sources to industrial trucks and to the charging equipment
shall conform to the requirements of Annex A.
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prEN 1175:2023 (E)
4.4.2 Connection to the mains
4.4.2.1 Battery charging
When external charging supply cables are connected to the truck, truck movement shall be
prevented. This safety function shall be in accordance with PL as defined in Table 6. This does not
r
apply to trucks designed only for permanent charging during operation.
The requirement is not intended for starter batteries.
4.4.2.2 On board charger and/or additional components
When trucks are fitted with on-board chargers or other devices connected to the mains, e.g.
heaters, the requirements of EN 60204-1:2018, 6.3, 7.2.1 and Clause 8 up to and including 8.2 shall
apply.
Enclosures containing equipment connected to the mains supply shall be in accordance with
IPXXB of EN 60529:1991. However, for top surfaces the degree of protection shall be in
accordance with at least IPXXD.
When the mains supply cables are connected to the truck it shall not be possible to induce any
truck movement. This safety function shall be in accordance with PL as defined in Table 6.
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NOTE 1 Where a main external power supply socket could be switched off this requirement can be met
by an interlock when the charger plug is in the home stowed position.
A position shall be provided on the truck to safely and properly store the cable, where
permanently attached.
NOTE 2 The protective earth conductor of the on-board charger and additional components connected
to the mains is essential for the protection against electrical shock in case of insulation fault.
4.4.3 Electrical energy sources for IC trucks (hybrid systems)
Energy sources based on capacitors, e.g. electric double layer capacitors, shall be equipped with
warning signs for residual voltage.
Energy sources based on battery technology shall be equipped with a switching off device in
accordance with 4.9.1.3. They shall be manually disconnectable and shall be automatically
disconnected in case of an electrical fault related to the power system. They shall be provided with
warning signs referring to high stored energy at high voltage. The warning signs shall be
permanent and indelible.
4.4.4 Connectors
Connectors for energy sources shall conform to Annex A.
Connectors not fitted with locking devices as defined in A.3.9 shall be arranged so that dead weight
and environmental effects e.g. vibration or acceleration do not lead to an unintended
disconnection of the connector.
4.4.5 Direct current contactors
Contactors shall be designed and manufactured to withstand the stresses occurring during
installation and normal use. For additional information see the relevant part of EN 60947.
Electromagnetic contactors used for performing safety functions shall conform to Annex B.
Truck manufacturers shall select and install contactors, and provide information for maintenance
with the instruction handbook, in accordance with the specifications and instructions of the
contactor manufacturer.
oSIST prEN 1175:2023
prEN 1175:2023 (E)
4.4.6 Electric drive system
Motors, converters, generators and energy sources shall conform to Annex D.
4.4.7 Electrical Components
Conductors and cables shall conform to Annex G.
4.5 Travel and brake control systems
4.5.1 General
For the drive system the following are considered as safe and can be used to achieve a safe state
e.g. in case of a failure in the drive system:
a) no driving torque, on the condition that the truck has an additional braking system which can
be activated by the operator;
b) automatic braking by the drive system and/or by the braking system till and during standstill;
c) automatic speed reduction to a specific limit based on type, application and condition of the
truck so long as the operator has full control and release of the speed control leads to the
stopping of powered movement.
Failures of the electrical system leading to behaviour as mentioned in a), b) or c) or any
combination thereof may be treated as non-safety relevant.
Control actions to achieve a safe state are only required for safety-related parts of control systems
of Category 2 and higher as defined in EN ISO 13849-1:202X.
NOTE 1 Additional information regarding the correspondence between requirements of 4.5 and most
common causes of hazard can be found in Annex J.
NOTE 2 Experience shows that safe conditions designed in accordance with a) lead to an approximate
braking effect which is 50 % of that achieved by options b) or c).
NOTE 3 Limitation in the use of a), b) and c) to achieve a safe state is indicated in the appropriate
subclauses.
4.5.2 Travel control system
The travel control system shall be so arranged that on level ground the truck will start from
standstill only when the control(s) for speed and direction are activated. For IC trucks, after
engaging direction control, low speed is allowed without activation of the speed control.
Means shall be provided to avoid any truck movement when:
— switching on the travel control system;
— starting the engine of an IC truck.
Any initial activation of the drive system shall only be possible from the neutral position of the
speed and/or directional control(s).
These safety functions shall be in accordance with the PL as defined in Table 2.
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NOTE Restart of the engine by a start/stop system is not considered as starting the engine.
oSIST prEN 1175:2023
prEN 1175:2023 (E)
4.5.3 Monitoring of operating position
On sit-on rider-controlled trucks a separate device (OPC), independent of the speed control
(accelerator), shall automatically bring an active drive system to a safe state, as defined in 4.5.1 a)
or b) when the operator leaves the normal operating position.
On stand-on rider-controlled trucks a separate device (OPC), independent of the speed control
(accelerator), shall automatically bring an active drive system to a safe state, as defined in 4.5.1 b)
when the operator leaves the normal operating position.
Nuisance deactivation of the OPC due to operating conditions, such as rough ground, shall be
prevented. The safe state shall be initiated not later than 2,0 s after deactivation of the OPC. This
time delay shall be reduced to maximum 0,2 s when the speed control device is released. In
addition to the deceleration provided by the OPC, the braking system shall be available to the
operator.
Powered travel movement from standstill after the operator returns to the normal operating
position shall occur only when the traction control device is activated from the neutral position.
During deceleration following release of the OPC while travelling, powered travel movement can
be restored automatically provided that the speed control is active. Restoring the powered travel
movement shall not cause hazardous accelerations which cannot be controlled by the operator.
Where separate travel controls other than those at the normal operating position are provided
according to EN ISO 3691-1:2015, 4.4.2.6 the OPC can be overridden when this system is used. It
shall not be possible to override the OPC when operation is from the normal operation position
(e.g. interlock).
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