AS ISO 14990.2 pdf download Earth-moving machinery — Electrical safety of machines utilizing electric drives and related components and systems Part 2: Particular requirements for externally-powered machines
This document specifies the particular safety requirements for the electrical equipment and itscomponents incorporated in externally-powered (mains-connected, including machines powered byexternal dedicated generators), electrically-driven earth-moving machines (EMMs).
lt is applicable to those machines using on-board voltages in the range of 50 V-36 kV AC r.m.s. at anyfrequency and 75 V-36 kV DC — including any repetition rate of pulsating DC — intended for outdooruse. Voltages occurring within devices are not considered to be on-board voltages and are thus notwithin its scope.
lt is intended to be used in conjunction with IS0 14990-1, which gives general requirements for EMMsregardless of how they are powered.Requirements specific to self-powered machines are givenin lS0 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 caseiso 14990-3 is also applicable.
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references,only the edition cited applies. Forundated 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 orrelated components and systems – Part 1: General requirements
ISO 14990-3, Earth-moving machinery —Electrical safety of machines utilizing electric drives or relatedcomponents and systems —Part 3: Particular requirements for self-powered machines
IEC 60071-1:2006，Insulation Coordination — Part 1: Definitions,principles and rules. Amended byIEC60071-1:2006/Amd.1:2010
IEC 60364-5-52,Low-voltage electrical installations — Part 5-52: Selection and erection of electricalequipment—- Wiring systems
IEC 60445,Basic and safety principles for man-machine interface，marking and identification -ldentification of equipment terminals, conductor terminations and conductors
IEC 60664-1，Insulation coordination for equipment within low-voltage systems — Part 1: Principles,requirements and tests
3Terms, definitions and abbreviated terms
For the purposes of this document,the terms,definitions and abbreviated terms given inISO 14990-1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:一IEC Electropedia: available at http://www.electropedia.org/
– ISo online browsing platform: available at http://www.iso.org/obp
4 General requirements4.1 General
The requirements of lSO 14990-1:2016, Clause 4, shall apply except as modified by this clause.4.2Special conditions
The enquiry form given in Annex A can be used as the basis for an agreement between user and supplierto address special conditions, or where certain provisions of this document might not be applicable.The waiver of any requirement shall be limited to situations not covered by this document.
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 conductorsfor the sum of the 2nd to the 5th harmonic.An additional 2 % of the total r.m.s. voltage between liveconductors 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 zerosequence 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 timein 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 cyclewith more than 1 s between successive dips.
22.214.171.124 From batteries
Voltage: 0,85 to 1,15 of nominal voltage; 0,7 to 1,2 of nominal voltage in the case of battery-operated vehicles.
voltage interruption: Not exceeding 5 ms.126.96.36.199From converting equipmentvoltage: 0,9 to 1,1 of nominal voltage.
Voltage interruption: Not exceeding 20 ms with more than 1 s between successive interruptions.NOTE This is a variation on IEC Guide 106 for ensuring the proper operation of electronic equipment.Ripple (peak-to-peak): Not exceeding 0,15 of nominal voltage.