Sizing and protection of conductors: Difference between revisions
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[[Isc at the receiving end of a feeder in terms of the Isc at its sending end|Isc at the receiving end of a feeder in terms of the Isc at its sending end]] | [[Isc at the receiving end of a feeder in terms of the Isc at its sending end|Isc at the receiving end of a feeder in terms of the Isc at its sending end]] | ||
Short-circuit current supplied by an alternator or an inverter | Short-circuit current supplied by an alternator or an inverter: refer to [[Characteristics of particular sources and loads]] | ||
=== Particular cases of short-circuit current === | === Particular cases of short-circuit current === | ||
Revision as of 13:05, 11 February 2011
Conductor sizing and protection
Overcurrent protection principles
Practical values for a protective scheme
Location of protective devices
Practical method for determining the smallest allowable cross-sectional area of circuit conductors
General
General method for cables
Recommended simplified approach for cables
Determination of voltage drop
Calculation of voltage drop in steady load conditions
Short-circuit current
Short-circuit current at the secondary terminals of a MV/LV distribution transformer
3-phase short-circuit current (Isc) at any point within a LV installation
Isc at the receiving end of a feeder in terms 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
Verification of the withstand capabilities of cables under short-circuit conditions
Protective earthing conductor
Connection and choice
Conductor sizing
Protective conductor between MV/LV transformer and the main general distribution board (MGDB)
The neutral conductor
rotection of the neutral conductor
Breaking of the neutral conductor
Isolation of the neutral conductor
Worked example of cable calculation
Downloads
2010 edition in English: G-Sizing and protection of conductors
2010 edition in French:
G-La protection des circuits 1
G-La protection des circuits 2
