BS ISO 14990-3:2016 pdf download

BS ISO 14990-3:2016 pdf download.Earth-moving machinery — Electrical safety of machines utilizing electric drives and related components and systems
1 Scope
This document specifies the particular safety requirements for the electrical equipment and its components incorporated in self-powered (utilizing on-board electric power sources) electrically- driven earth-moving machines (EMMs). 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 externally-powered machines are given in ISO 14990-2. It is possible to have an EMM that is 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 14990-2 is also applicable. NOTE For machines intended to be operated on-road, automotive standard ISO 6469 and/or UN ECE R100 may provide useful guidance. See Annex B for a comparison of requirements.
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 14990-2, Earth-moving machinery — Electrical safety of machines utilizing electric drives or related components and systems — Part 2: Particular requirements for externally-powered machines
3 Terms and definitions
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:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
5 Protection against electric shock hazards
The requirements of ISO 14990-1:2016, Clause 5 shall apply except as modified by this clause.
5.1 See Figure 2 for an example of equipotential bonding for electrical equipment of a self-powered EMM.
5.2 Each protective conductor connecting point on a machine shall be marked or labelled as such using the symbol IEC 60417-5019 1) or with the letters “PE”, or by use of the bicolour combination GREEN-AND- YELLOW, or by any combination of these. The graphical symbol is preferred. Alternatively, each protective conductor connecting point on a self-powered machine may be marked or labelled as such using the symbol IEC 60417-5020 2) .
5.3 On self-powered machines, the protective conductors, the conductive structural parts of the electrical equipment, and those extraneous conductive parts which form the structure of the machine shall all be connected to a protective bonding terminal to provide protection against electric shock. Where a self-powered machine is also capable of being connected to an external incoming power supply, this protective bonding terminal shall be the connection point for the external protective conductor. When the supply of electrical energy is self-contained within mobile equipment, and when there is no external supply connected (for example when an on-board battery charger is not connected), there is no need to connect such equipment to an external protective conductor.