Chapter G

Sizing and protection of conductors

Sizing and protection of conductors: Difference between revisions

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=== [[Conductor sizing and protection]] ===
=== [[Conductor sizing and protection]] ===
 
* [[Conductor sizing: methodology and definition]]
[[Conductor sizing: methodology and definition|Methodology and definition]]  
* [[Overcurrent protection principles]]
 
* [[Practical values for a protective scheme]]
[[Overcurrent protection principles|Overcurrent protection principles]]
* [[Location of protective devices]]
 
* [[Conductors in parallel]]
[[Practical values for a protective scheme|Practical values for a protective scheme]]
=== [[Practical method for determining the smallest allowable cross-sectional area of circuit conductors]] ===
 
* [[General method for cable sizing]]
[[Location of protective devices|Location of protective devices]]
* [[Recommended simplified approach for cable sizing]]
 
* [[Sizing of busbar trunking systems (busways)]]
[[Conductors in parallel|Conductors in parallel]]
=== [[Determination of voltage drop]] ===
 
* [[Maximum voltage drop limit]]
=== [[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]] ===
* [[Calculation of voltage drop in steady load conditions]]
 
=== [[Short-circuit current]] ===
 
* [[Short-circuit current at the secondary terminals of a MV/LV distribution transformer]]
[[General method for cable sizing|General method for cable sizing]]
* [[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]]
[[Recommended simplified approach for cable sizing|Recommended simplified approach for cable sizing]]  
* [[Short-circuit current supplied by a generator or an inverter]]
 
=== [[Particular cases of short-circuit current]] ===
[[Busbar trunking systems|Busbar trunking systems]]  
* [[Calculation of minimum levels of short-circuit current]]
 
* [[Verification of the withstand capabilities of cables under short-circuit conditions]]
=== [[Determination of voltage drop|Determination of voltage drop]] ===
=== [[Protective earthing conductor (PE)]] ===
 
* [[Connection and choice for protective earthing conductor]]
[[Maximum voltage drop limit|Maximum voltage drop limit]]  
* [[Sizing of protective earthing conductor]]
 
* [[Protective conductor between MV/LV transformer and the main general distribution board (MGDB)]]
[[Calculation of voltage drop in steady load conditions|Calculation of voltage drop in steady load conditions]]  
* [[Equipotential conductor]]
 
=== [[The neutral conductor]] ===
=== [[Short-circuit current]] ===
* [[Sizing the neutral conductor]]
 
* [[Protection of the neutral conductor]]
[[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]]  
* [[Breaking of the neutral conductor]]
 
* [[Isolation of the neutral conductor]]
[[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]]  
=== [[Worked example of cable calculation]] ===
 
[[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]] ===




Revision as of 06:39, 3 December 2014

Conductor sizing and protection

Practical method for determining the smallest allowable cross-sectional area of circuit conductors

Determination of voltage drop

Short-circuit current

Particular cases of short-circuit current

Protective earthing conductor (PE)

The neutral conductor

Worked example of cable calculation


External links

ru:Выбор сечения и защита проводников zh:电路保护

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