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<< Click to Display Table of Contents >> Conductor Details |
  
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<< Click to Display Table of Contents >> Conductor Details |
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Field |
Field Description |
Description |
Description of the Conductor |
User Code |
User Definable Code |
Positive Sequence Resistance |
Positive sequence AC resistance at the specified temperature |
Positive Sequence Reactance |
Positive sequence AC reactance at the specified temperature |
Positive Sequence Charging |
Positive sequence AC line Charging at the specified temperature |
Zero Sequence Resistance |
Zero sequence AC resistance at the specified temperature |
Zero Sequence Reactance |
Zero sequence AC reactance at the specified temperature |
Zero Sequence Charging |
Zero sequence AC line Charging at the specified temperature |
Neutral Resistance |
Not Used |
Neutral Reactance |
Not Used |
Neutral Charging |
Not Used |
Conductor Constant |
228.1 - Aluminium 234.5 - 100% Annealed Copper 241.5 - 97% Hard Drawn Copper |
Temperature |
Temperature the impedances are based upon |
Normal Current Rating |
The current rating of normal operating conditions |
Overload Current Rating |
The current rating for emergency conditions |
The temperature field for the conductor definition is utilised for specifying the temperature at which the conductor impedances are defined. A branch in PowaMaster contains an operating temperature field which is utilised for calculating the change in conductor impedance with temperature. The formula that is utilised is R2 = (M + T2)*R1/(M+T1) where M is the conductor constant. R2 is the adjusted resistance for operating temperature T2. R1 is the manufacturers resistance at temperature T1. Thus if T2 = T1 then no adjustment is made to the conductor resistance. See Branch Modelling