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PD IEC TR 61439-0:2022 Low-voltage switchgear and controlgear assemblies - Guidance to specifying assemblies, 2022
- undefined
- English [Go to Page]
- CONTENTS
- FOREWORD
- INTRODUCTION
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Application of assemblies within the IEC 61439 series [Go to Page]
- 4.1 General
- 4.2 Assembly design and verification
- 4.3 Service conditions and interface characteristics
- 4.4 Application design
- 5 Electrical system [Go to Page]
- 5.1 General
- 5.2 Earthing system
- 5.3 Nominal voltage
- 5.4 Transient overvoltages
- 5.5 Unusual voltage transients, temporary overvoltages
- 5.6 Rated frequency fn (Hz)
- Figures [Go to Page]
- Figure 1 – Required rated impulse withstand voltage
- 5.7 Additional on-site testing requirements: wiring, operational performance and function
- 6 Short-circuit withstand capability [Go to Page]
- 6.1 General
- 6.2 Prospective short-circuit current at supply terminals Icp (kA)
- 6.3 Prospective short-circuit current in the neutral
- 6.4 Prospective short-circuit current in the protective circuit
- 6.5 Short-circuit protective device (SCPD)
- 6.6 Coordination of short-circuit protective devices including external short-circuit protective device details
- 6.7 Data associated with loads likely to contribute to the short-circuit current
- 6.8 Multiple supplies
- 7 Protection of persons against electric shock [Go to Page]
- 7.1 General
- 7.2 Basic protection (protection against direct contact) [Go to Page]
- 7.2.1 General
- 7.2.2 Basic insulation provided by insulating material
- 7.2.3 Basic insulation by barriers or enclosures
- 7.3 Fault protection (protection against indirect contact) [Go to Page]
- 7.3.1 General
- 7.3.2 Requirements for the protective conductor to facilitate automatic disconnection of the supply
- 7.3.3 Electrical separation
- 7.3.4 Class II protection (double or reinforced insulation)
- 8 Installation environment [Go to Page]
- 8.1 General
- 8.2 Location type
- 8.3 Protection against access to hazardous parts, ingress of solid foreign bodies and ingress of water (IP code)
- Tables [Go to Page]
- Table 1 – IP codes, first numeral
- Table 2 – IP codes, second numeral
- 8.4 External mechanical impact (IK code)
- Table 3 – IP codes, additional letter (optional)
- 8.5 Resistance to radiation [Go to Page]
- 8.5.1 General
- 8.5.2 Solar irradiance
- 8.5.3 Ultraviolet (UV) radiation
- 8.6 Resistance to corrosion
- 8.7 Ambient air temperature
- 8.8 Maximum relative humidity
- 8.9 Pollution degree
- 8.10 Altitude
- 8.11 Electromagnetic compatibility (EMC)
- 8.12 Special service conditions [Go to Page]
- 8.12.1 General
- 8.12.2 Climatic conditions
- 8.12.3 Protection against ingress of solid foreign bodies and ingress of water (IP code)
- 8.12.4 Shock, vibration, seismic occurrence and external mechanical impact (IK code)
- 8.12.5 Fire and explosion hazards
- 8.12.6 Exceptional overvoltages
- 8.12.7 Polluted atmospheres
- 8.12.8 EMC environment
- 9 Installation method [Go to Page]
- 9.1 General
- 9.2 Assembly type
- 9.3 Portability
- 9.4 Maximum overall dimensions and weight
- 9.5 External conductor type(s)
- 9.6 Direction(s) of external conductors
- 9.7 External conductor material
- 9.8 External line conductor, cross sections, and terminations
- 9.9 External PE, N, PEN, PEM, PEL conductors’ cross sections, and terminations
- 9.10 Special terminal identification requirements
- 10 Storage and handling [Go to Page]
- 10.1 General
- 10.2 Maximum dimensions and weight of transport units
- 10.3 Methods of transport (e.g. forklift, crane)
- 10.4 Environmental conditions different from the service conditions
- 10.5 Packing details
- 11 Operating arrangements [Go to Page]
- 11.1 General
- 11.2 Access to manually operated devices
- 12 Maintenance and upgrade capabilities [Go to Page]
- 12.1 General
- 12.2 Requirements related to accessibility for inspection and similar operations
- 12.3 Requirements related to accessibility for maintenance in service by authorized persons
- 12.4 Requirements related to extension under voltage
- 12.5 Protection against direct contact with hazardous live internal parts during maintenance or upgrade
- 12.6 Method of functional unit connection
- 12.7 Operating and maintenance gangways within an assembly
- 12.8 Internal separation (only relevant for assemblies in accordance with IEC 61439-2) [Go to Page]
- 12.8.1 Fundamentals of separation
- 12.8.2 Considerations when determining a form of separation
- 12.8.3 Selecting the most appropriate form of separation
- Figure 2 – Examples of separation included in IEC 61439-2
- 13 Current carrying capability [Go to Page]
- 13.1 General
- 13.2 Rated current of the assembly InA (A) (maximum current allowable)
- 13.3 Loading of outgoing circuits within an assembly
- 13.4 Ratio of cross section of the neutral conductor to line conductors [Go to Page]
- 13.4.1 General
- 13.4.2 Line conductors up to and including 16 mm2
- 13.4.3 Line conductors above 16 mm2
- Table 4 – Assemblies and application ratings
- 14 Assembly design and routine verification processes [Go to Page]
- 14.1 Design verification [Go to Page]
- 14.1.1 Object
- 14.1.2 Methods
- 14.1.3 Records
- 14.2 Routine verification [Go to Page]
- 14.2.1 General
- 14.2.2 Records
- Annex A (informative)Cross section of copper cables suitablefor connection to terminals for external cables [Go to Page]
- Table A.1 – Cross section of copper cables suitable for connection to terminals for external cables
- Annex B (informative)Forms of internal separation (see 12.8) [Go to Page]
- Table B.1 – Forms of internal separation
- Figure B.1 – Symbols used in Figure B.2, Figure B.3 and Figure B.4
- Figure B.2 – Form 1 and Form 2
- Figure B.3 – Form 3
- Figure B.4 – Form 4
- Annex C (informative)Specification template for assemblies [Go to Page]
- Table C.1 – Example of items typically subject to agreement betweenthe assembly manufacturer and the user
- Annex D (informative)Optional information [Go to Page]
- D.1 General
- Table D.1 – Examples of optional items subject to agreement betweenthe assembly manufacturer and the specifier
- D.2 Electrical conditions [Go to Page]
- D.2.1 Internal arc-fault considerations
- D.2.2 Insulated busbars
- Annex E (informative)List of notes concerning certain countries
- Bibliography [Go to Page]
