Calculation Methodology
ConductorPro's steady-state ampacity calculation report states that its calculations are performed in accordance with IEEE Std 738-2012.
- IEEE Std 738-2012
These references identify the calculation methodology used. They do not indicate certification or independent validation of ConductorPro.
Conductor Inputs
The calculation starts from the physical and thermal properties of the conductor and the target conductor temperature.
- Conductor diameter
- Resistance at different temperatures
- Emissivity
- Solar absorptivity
- Target conductor temperature
Environmental Inputs
Weather and site conditions determine how much heat the conductor gains and loses.
- Ambient temperature
- Date and time
- Latitude
- Line azimuth and elevation
- Wind direction
- Wind speed
Heat-Balance Calculation
The report presents each term of the steady-state heat balance, so the resulting thermal rating can be traced back to its components.
- Convection heat loss
- Radiative heat loss
- Solar heat gain
- Resistance at operating temperature
- Steady-state heat-balance calculation