Sizing and protection of conductors: Difference between revisions

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=== Conductor sizing and protection ===
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[[Conductor sizing: methodology and definition|Methodology and definition]]


[[Overcurrent protection principles|Overcurrent protection principles]]
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---- Description text for this chapter - START
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Selection of cross-sectional-areas of cables is certainly one of the most important tasks of the design process of an electrical installation as this greatly influences:
* the selection of overcurrent protective devices,
* the voltage drop along these conductors
* and the estimation of the prospective short-circuit currents
This chapters details the different steps and methodologies for conductor sizing. And the specific recommendations for neutral and Protective Earth (PE) conductors sizing.
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---- Description text for this chapter - END
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[[Practical values for a protective scheme|Practical values for a protective scheme]]


[[Location of protective devices|Location of protective devices]]
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[[Conductors in parallel|Conductors in parallel]]
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=== [[Practical method for determining the smallest allowable cross-sectional area of circuit conductors|Practical method for determining the smallest allowable cross-sectional area of circuit conductors]]<br> ===
==External links==
 
*[https://www.se.com/ww/en/product-category/26426075-energy-management-software-solutions/?filter=business-4-low-voltage-products-and-systems Electrical design software]
[[General method for cable sizing|General method for cable sizing]]
 
[[Recommended simplified approach for cable sizing|Recommended simplified approach for cable sizing]]
 
[[Busbar trunking systems|Busbar trunking systems]]
 
=== [[Determination of voltage drop|Determination of voltage drop]]  ===
 
[[Maximum voltage drop limit|Maximum voltage drop limit]]
 
[[Calculation of voltage drop in steady load conditions|Calculation of voltage drop in steady load conditions]]  


=== Short-circuit current  ===
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---- ADD BELOW external links, inter-language links, and possibly other related content links
[[Short-circuit current at the secondary terminals of a MV/LV distribution transformer|Short-circuit current at the secondary terminals of a MV/LV distribution transformer]]
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[[3-phase short-circuit current (Isc) at any point within a LV installation|3-phase short-circuit current (Isc) at any point within a LV installation]]
 
[[Isc at the receiving end of a feeder as a function of the Isc at its sending end|Isc at the receiving end of a feeder as a function of the Isc at its sending end]]
 
Short-circuit current supplied by an alternator or an inverter: refer to [[Characteristics of particular sources and loads]]
 
=== Particular cases of short-circuit current  ===
 
[[Calculation of minimum levels of short-circuit current|Calculation of minimum levels of short-circuit current]]
 
[[Verification of the withstand capabilities of cables under short-circuit conditions|Verification of the withstand capabilities of cables under short-circuit conditions]]<br>
 
=== Protective earthing conductor  ===
 
[[Connection and choice for protective earthing conductor|Connection and choice for protective earthing conductor]]
 
[[Sizing of protective earthing conductor|Sizing of protective earthing conductor]]
 
[[Protective conductor between MV/LV transformer and the main general distribution board (MGDB)|Protective conductor between MV/LV transformer and the main general distribution board (MGDB)]]
 
[[Equipotential conductor|Equipotential conductor]]
 
=== The neutral conductor  ===
 
[[Sizing the neutral conductor|Sizing the neutral conductor]]
 
[[Protection of the neutral conductor|Protection of the neutral conductor]]
 
[[Breaking of the neutral conductor|Breaking of the neutral conductor]]
 
[[Isolation of the neutral conductor|Isolation of the neutral conductor]]
 
=== [[Worked example of cable calculation|Worked example of cable calculation]]  ===
 
 
<br>
==Downloads==
2010 edition in English: [[Media:G-Sizing-and-protection-of-conductors.pdf|G-Sizing and protection of conductors]] <br>
2010 edition in French: <br>[[Media:G-La-protection-des-circuits-1.pdf|G-La protection des circuits 1]] <br>  [[Media:G-La-protection-des-circuits-2.pdf|G-La protection des circuits 2]]
 
==External links==
*[http://www.technical-publications.schneider-electric.com/sites/corporate/en/products-services/technical-publications/technical-publications.page Electrical Conceptual information given in "Cahiers Techniques"]
*[http://www.soft.schneider-electric.com/ Electrical installation software]

Latest revision as of 13:46, 26 January 2024

Banner-chapter G.jpg

Selection of cross-sectional-areas of cables is certainly one of the most important tasks of the design process of an electrical installation as this greatly influences:

  • the selection of overcurrent protective devices,
  • the voltage drop along these conductors
  • and the estimation of the prospective short-circuit currents

This chapters details the different steps and methodologies for conductor sizing. And the specific recommendations for neutral and Protective Earth (PE) conductors sizing.

Chapter G - Contents

External links


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