35kV CU CABLE
Application
35kV 133% insulation level primary URD cable for wet/dry locations, direct burial, underground duct, and sunlight exposure in residential and commercial distribution networks. EPR insulation rated 105°C continuous. One-third concentric neutral design.
Core Strengths
Ungrounded systems cause transient overvoltages that degrade 100% rated cables. Our 133% insulation level withstands system transients. EPR provides superior dielectric strength. CE/TÜV/ISO. Factory direct.
Standard
ASTM B-3, B-8
ANSI/ICEA S-94-649 AEIC CS-8
Construction
1. Conductor: Stranded Compacted Circular Copper Conductor
2. Conductor screen: Semi-conductive cross-linked compounds
3. Insulation: Ethylene Propylene Rubber (EPR) 133% insulation level
4. Insulation screen: Semi-conductive cross-linked compounds
5. Longitudinal Waterblocking 1:Semi-conductive swellable tape
6. Metal screen( Concentric Neutral ): Helically applied soft drawn bare copper one-third concentric neutral
7. Longitudinal Waterblocking 2: Swellable Tape
8. Outer Jacket: HDPE
Features
Rated voltage: 35kV (133% insulation level – withstands system transient overvoltages)
Copper conductor – high conductivity, excellent ampacity
EPR insulation – 105°C continuous rating, superior dielectric strength
One‑third concentric neutral design – integrated grounding, simplifies installation
Dual longitudinal water‑blocking – prevents moisture ingress and water tree growth
HDPE outer jacket – high abrasion resistance, suitable for direct burial and sunlight exposure
Ideal for primary URD (underground residential distribution) in wet/dry locations
Product Data Sheet
No. | Construction | Material | Data | ||
1/0 AWG | 250 MCM | 500 MCM | |||
1 | Conductor | Compacted Stranded copper water-blocking conductor | 19 Compacted Stranded Approx. Ø8.5mm | 37 Compacted Stranded Approx. Ø13.2mm | 37 Compacted Stranded Approx. Ø18.7mm |
2 | Conductor screen | Semi-conducting compound | Nominal thickness 0.6mm | Nominal thickness 0.6mm | Nominal thickness 0.6mm |
3 | Insulation | EPR | Nominal thickness 10.5mm | Nominal thickness 10.5mm | Nominal thickness 10.5mm |
4 | Insulation screen | Semi-conducting compound | Nominal thickness 1.1mm | Nominal thickness 1.1mm | Nominal thickness 1.5mm |
5 | Longitudinal Waterblocking 1 | Semi-conductive swellable tape | Nominal thickness 0.25mm | Nominal thickness 0.25mm | Nominal thickness 0.25mm |
6 | Neutral conductor | Concentric uncoated copper wire | Copper wire with a total cross-sectional area of 18.30 mm² | Copper wire with a total cross-sectional area of 43.73 mm² | Copper wire with a total cross-sectional area of 86.03mm2 |
7 | Longitudinal Waterblocking 2 | Swellable Tape | Nominal thickness 0.25mm | Nominal thickness 0.25mm | Nominal thickness 0.25mm |
8 | Outer jacket | Black HDPE | Nominal thickness 2.0mm | Nominal thickness 2.1mm | Nominal thickness 2.7mm |
Outer diameter of cable(Approx.) | Ø41mm | Ø46mm | Ø54mm | ||
Cable weight(Approx.) | 2.17kg/m | 3.40kg/m | 5.49kg/m | ||
Minimum Bending Radius(Static (after installation) | 328mm | 368mm | 432mm | ||
Minimum Bending Radius(With tension during installation process) | 492mm | 552mm | 648mm | ||
Maximum pulling tension* | 3.75kN | 8.89kN | 15.96kN | ||
Capacitance | 0.176 µF/km | 0.190 µF/km | 0.204 µF/km | ||
Electrical field stress(Conductor screen) | 3.69 kV/mm | 3.13 kV/mm | 2.81 kV/mm | ||
Electrical field stress(Insulation) | 1.12 kV/mm | 1.26 kV/mm | 1.37 kV/mm | ||
Long time working temperature Max. | 90℃ | 90℃ | 90℃ | ||
Emergency overload temperature Max. | 130℃ | 130℃ | 130℃ | ||
Short-circuit temperature (typically for 5 seconds Max.) | 250℃ | 250℃ | 250℃ | ||
At 25℃ phase conductor D.C. resistance Max. | 0.335Ω/Km | 0.141Ω/Km | 0.0708Ω/Km | ||
Maximum pulling tension*:Pulling tension based on pulling eye directly connected to conductor.
The voltage gradient design of the 35 kV 133% EPR insulated cable is based on the requirements of ICEA S-94-649.The insulation thickness of 10.5 mm is selected in accordance with standard practice. The electrical field distribution is calculated using the coaxial cable model.The calculated maximum and minimum voltage gradients are within acceptable limits for EPR insulation systems:
Maximum voltage gradient ≤ 4.5 kV/mm
Minimum voltage gradient ≥ 1.0 kV/mm
The design is therefore considered adequate and compliant with ICEA S-94-649.
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