EN 1175 defines the electrical requirements for designing and constructing the electrical installations of self-propelled industrial trucks covered by ISO 5053-1:2020. It does not apply to rough-terrain variable-reach trucks, straddle carriers, or functions used for the automatic operation of driverless industrial trucks. It provides the electrical/electronic and safety-related parts of control system requirements for those self-propelled industrial trucks identified above.
For detailed information about the electrical/electronic requirements for driverless trucks see EN ISO 3691-4:2023. Reference is made to this document in other standards which cover the non-electrical requirements of the various industrial truck types.
EN 1175 deals with safety requirements for all electrical and electronic components of industrial trucks, including electrically actuated hydraulic and pneumatic valves. It specifies minimum performance levels required for safety functions realised by safety related parts of control systems. It is intended to be used to avoid or minimise 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.
EN 1175 does not deal with hazards which could occur:
— during construction,
— when operating in potentially explosive atmospheres,
— 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.,
— when operating outside the range of 30 % to 95 % (not condensing) of relative humidity.
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.
Hazards due to penetration of water and dust are covered by the definition of PLr of safety functions, according to EN ISO 13849-1:2023. Safety measures outside the scope of the electrical/electronic system are covered by other safety standards e.g. EN ISO 3691 series and EN 16307 series.
