AS ISO 14990.2:2022 pdf free download – Earth-moving machinery – Electrical safetyof machines utilizing electric drives andrelated components and systems Part 2: Particular requirements for externally-powered machines

AS ISO 14990.2:2022 pdf free download – Earth-moving machinery – Electrical safetyof machines utilizing electric drives andrelated components and systems Part 2: Particular requirements for externally-powered machines.
This document specifies the particular safety requirements for the electrical equipment and its components incorporated in externally-powered (mains-connected, including machines powered by external dedicated generators), electrically-driven earth-moving machines (EMM5).
It is applicable to those machines using on-board voltages in the range of 50 V—36 kV AC r.m.s. at any frequency and 75 V-36 kV DC — including any repetition rate of pulsating DC — intended for outdoor use, Voltages occurring within devices are not considered to be on-board voltages and are thus not within its scope.
It is Intended to be used in conjunction with ISO 14990-1. which gives general requirements for EMMs regardless of how they are powered. Requirements specific to self-powered machines are given in Iso 14990-3. However, it is possible for an EMM to be both self-powered and externally-powered (e.g. a battery-powered machine having a built-In charger with power supply function). in which case ISo 14990-3 is also applicable.
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 14990-1:2016, Earth-moving machinery — Electrical safety of machines utilizing electric drives or related components and systems — Part 1: General requirements
ISO 14990-3, Earth-moving machinery — Electrical safety of machines utilizing electric drives or related components and systems — Part 3: Particular requirements for self powered machines
IEC 6007 1-1:2006. Insulation Coordination — Part 1: Definitions, principles and rules. Amended by IEC 60071-1:2006/Amd. 1:2010
IEC 60364-5-52, Low-voltage electrical lnstallat,ons — Part 5-52: Selection and erection of electrical equipment — Wiring systems
IEC 60445, Basic and safety principles for man-machine interface, marking and identificuf ion — Identification of equipment terminals, conductor terminations and conductors
IEC 60664-1, Insulation coordination for equipment within low-voltage systems — Part 1: Principles, requirements and tests
3 Terms, definitions and abbreviated terms
For the purposes of this document, the terms, definitions and abbreviated terms given in
ISO 14990-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
9.2 Supply conductors
Unless otherwise specified by the user, the supplier of the electrical equipment is not responsible for providing the overcurrent protective device for the supply conductors to the electrical equipment.
The supplier of the electrical equipment shall state on the installation diagram the data necessary for selecting the overcurrent protective device.
9.3 Socket outlets
Overcurrent protection shall be provided in the unearthed live conductors of each circuit feeding general-purpose socket outlets intended primarily for supplying power to maintenance equipment
9.4 Protection against supply interruption or voltage reduction and subsequent restoration
Where a supply interruption or a voltage reduction can cause a hazardous situation, damage to the machine, or to the work in progress, undervoltage protection shall he provided by. for example, shutting down the machine at a predetermined voltage level.
Where the operation of the machine can allow for an interruption or a rcductlon of the voltage for a short time period, delayed undervoltage protection maybe provided. The operation of the undervoltage device shall not impair the operation of any stopping control of the machine.
Upon restoration of the voltage or upon switching on the incoming supply, automatic or unexpected restarting of the machine shall be prevented where such a restart can cause a hazardous situation.
Where only a part ofthe machine or of the group of machines working together in a coordinated manner is affected by the voltage reduction or supply interruption, the undervoltage protection shall initiate appropriate control responses to ensure coordination.
9.5 Phase sequence protectIon
Where an incorrect phase sequence of the supply voltage can cause a hazardous situation or damage to the machine, protection shall he provided.
NOTE Conditions of use that can lead to an incorrect phase sequence Include
— a machine transferred from one supply to another.
— a mobile machine with a facility for connection to an esternal power supply.
— supply cable repairs.