BS ISO 14990-2:2016 pdf download

BS ISO 14990-2:2016 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 externally-powered (mains-connected, including machines powered by external dedicated generators), 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 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 60071-1:2006, Insulation Coordination — Part 1: Definitions, principles and rules. Amended by
IEC 60071-1:2006/Amd. 1:2010
IEC 60364-5-52, Low-voltage electrical installations — Part 5-52: Selection and erection of electrical equipment — Wiring systems
IEC 60445, Basic and safety principles for man-machine interface, marking and identification —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.
4.3 Supplies
4.3.1 AC supplies
Voltage: Steady-state voltage: 0,9 to 1,1 of nominal voltage. Frequency: 0,99 to 1,01 of nominal frequency continuously; 0,98 to 1,02 short time. Harmonics: Harmonic distortion not exceeding 10 % of the total r.m.s. voltage between live conductors for the sum of the 2nd to the 5th harmonic. An additional 2 % of the total r.m.s. voltage between live conductors for the sum of the 6th to the 30th harmonic is permissible. Voltage unbalance: Neither the voltage of the negative sequence component nor the voltage of the zero sequence component in three-phase supplies exceeding 2 % of the positive sequence component. Voltage interruption: Supply interrupted or at zero voltage for not more than 3 ms at any random time in the supply cycle with more than 1 s between successive interruptions. Voltage dips: Voltage dips not exceeding 20 % of the peak voltage of the supply for more than one cycle with more than 1 s between successive dips.