JB/T 10181.3-2000
Calculation of the current rating of electric cables.Part 2:Thermal resistance.Section 1:Calculation of thermal resistance (English Version)
- Standard No.
- JB/T 10181.3-2000
- Language
- Chinese, Available in English version
- Release Date
- 2000
- Published By
- Professional Standard - Machinery
- Status
- 2014-10
- Replace By
- JB/T 10181.21-2014
- Latest
- JB/T 10181.21-2014
- Scope
- This standard applies to the steady-state operating conditions of all AC voltage levels and DC voltage cables of 5kV and below laid in the air or soil. The soil includes cables laid directly buried in the ground, pipes, cable trenches or steel pipes whether or not local soil drying occurs. The term "stable" means that a continuous constant current (100% load factor) is just sufficient to asymptotically reach the maximum temperature of the conductor under assumed constant conditions of the surrounding environment. This section provides calculation formulas for rated current carrying capacity and various losses. These formulas are basically rigorous, and the values of some important parameters are intentionally not specified. They can be divided into three groups: ——Parameters related to the cable structure (such as the thermal resistance coefficient of the insulation material), selected from those represented in public publications ——Parameters related to environmental conditions, whose values may vary widely, depending on the conditions of the laying site where the cable is used or where the cable will be used; ——parameters derived from negotiations between the manufacturer and the user, including operating conditions Safety margin (e.g. maximum conductor temperature).
JB/T 10181.3-2000 history
- 2014 JB/T 10181.21-2014 Electric cables.Calculation of the current rating.Part 21: Thermal resistance.Calculation of thermal resistance
- 2000 JB/T 10181.3-2000 Calculation of the current rating of electric cables.Part 2:Thermal resistance.Section 1:Calculation of thermal resistance
JB/T 10181.3-2000 Calculation of the current rating of electric cables.Part 2:Thermal resistance.Section 1:Calculation of thermal resistance was changed to JB/T 10181.21-2014 Electric cables.Calculation of the current rating.Part 21: Thermal resistance.Calculation of thermal resistance.
