IEC 60947-3-2020 pdf download.Low-voltage switchgear and controlgear – Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units.
This part of IEC 60947 applies to switches, disconnectors, switch-disconnectors and fuse- combination units and their dedicated accessories to be used in distribution circuits and motor circuits of which the rated voltage does not exceed 1 000 V AC or 1 500 V DC.
NOTE 1 Accessories are interconnecting units, extended terminals, internal coils, auxiliary contacts, motor operator, etc. offered as options with the basic unit.
This document does not apply to equipment coming within the scope of IEC 60947-2, IEC 60947-4- 1 and IEC 60947-5-1.
Particular requirements for switches, disconnectors, switch-disconnectors and fuse- combination units for use in photovoltaic (PV) DC applications are given in Annex 0.
Specific requirements for LV switchgear intended for the connections of aluminium conductors are given in Annex E.
Guidance on measurement of power loss is provided in Annex F.
This document does not include the additional requirements necessary for electrical apparatus for explosive gas atmospheres.
NOTE 2 Depending on its design, a switch (or disconnector) can be referred to as •a rotary switch (discorinector). cam-operated switch (disconnector). knife-switch (disconnector), etc.
NOTE 3 In this document, the word swltch also applies to the apparatus referred to In French as commutateurs” intended to modify the connections between several circuits and inter ella to substitute a part of a circuit for another.
NOTE 4 In general, throughout this document, switches. disconnectors. switch-disconnectors and fuse- combination units will be referred to as equipment.
The object of this document is to state:
a) the characteristics of the equipment;
b) the conditions that apply to the equipment with reference to:
1) operation and behaviour in normal service;
2) operation and behaviour in case of specified abnormal conditions, e.g. short-circuit:
3) dielectric properties:
c) the tests for confirming that these conditions have been met and the methods that are adopted for these tests;
d) the information relevant to the marking of the equipment or made available by the manufacturer, e.g. in the catalogue.
Specific items requiring agreement between the user and the manufacturer are identified in Annex B.
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.
IEC 60050-44 1, International Electrotechnical Vocabulary — Part 441: Switchgear, controlgear and fuses (available at http://www.electropedia.org)
IEC 60034-12:2016. Rotating electrical machines — Part 12: Starting performance of single- speed three-phase cage induction motors
IEC 60034-30-1:2014, Rotating electrical machines — Part 30-1: Efficiency classes of line operated AC motors (IE code)
IEC 60228:2004, Conductors of insulated cable
IEC 60269 (all parts), Low-voltage fuses
lEG 60417, Graphical symbols for use on equipment (available at http:!/www.graphicalsymbols.info/equipment)
IEC 60695-2-11:2014, Fire hazard testing — Part 2-11: Glowing/hot-wire based test methods — Glow-wire flammability test method for end-products (GWEPT)
IEC 60947-1:2020. Low-voltage switch gear and controlgear — Pert 1: General rules
IEC 60947-5-1:2016, Low-voltage switchgear and controlgear — Part 5-1: Control circuit devices and switching elements — Electromechanical control circuit devices
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) — Part 4-2: Testing and measurement techniques — Electrostatic discharge immunity test
IEC 61000-4-3:2006, Electromagnetic compatibility (EMC) — Part 4-3: Testing and measurement techniques — Radiated, radio-frequency, electromagnetic field immunity test
IEC 61000-4-3:2006IAMD1 :2007
IEC 61000-4-3:2006/AMD2:2010
IEC 61000-4-4:2012, Electromagnetic compatibility (EMC) — Part 4-4: Testing and measurement techniques — Electrical fast transient/burst immunity test
IEC 61000-4-5:2014, Electromagnetic compatibility (EMC) — Part 4-5: Testing and measurement techniques — Surge immunity test
IEC 61000-4-5:2014/AMD1:2017
3. Terms, definitions and index of terms
3.1 General
For the purposes of this document, the terms and definitions given in IEC 60050-441 and
IEC 60947-1 and the following 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.IEC 60947-3 pdf free download.