GB/T 12706.2-2008 "Power cables with extruded insulation and their accessories for rated voltages from 6kV (Um=7.2kV) up to 30kV (Um=36kV)"
GB/T 12706.3-2008 "Power cables with extruded insulation and their accessories for rated voltage 35kV (Um=40.5kV)"
GB/T 19666-2019 "General rules for flame retardant and fire resistant wires and cables or optical fiber cables"
IEC 60502 International equivalent standard
|
Item |
Parameter (3×400 Specification) |
|---|---|
|
Rated Voltage U₀/U |
26/35kV |
|
Maximum System Voltage Uₘ |
40.5kV |
|
Maximum Conductor Operating Temperature |
90℃ |
|
Short-Circuit Temperature (≤5s) |
Not exceeding 250℃ |
|
Installation Ambient Temperature |
≥ 0℃ (Preheating required below 0℃) |
|
DC Resistance of Conductor at 20℃ |
≤ 0.047 Ω/km |
|
Test Voltage |
91kV / 5min |
|
Partial Discharge Test Sensitivity |
≤ 10 pC |
|
Allowable Conductor Pulling Tension |
84000 N |
|
Approximate Cable Outer Diameter |
Approx. 122.4~127.4mm |
|
Approximate Cable Weight |
Approx. 23454~24952 kg/km (≈ 23.5~25 tons/km) |
|
Minimum Bending Radius |
15D during installation; 12D near connection boxes/terminations (D is the cable outer diameter) |
