Name: China Medium Voltage Underground Cable Manufacturers Suppliers Factory - Made in China - Huayu Cable
Brand: Huayu Cable
SKU: 314238096

Products Description

If you're pulling a primary power line through underground ducts or concrete trenches at 35kV, you can't afford insulation breakdown or high thermal losses. This 26/35kV cable is built with Class 2 stranded copper, triple-extruded XLPE, and a helical copper tape shield. It gives you maximum conductivity for high-load industrial feeds without the extra bulk or stiffness of heavy steel armor.

Quick Specs

Voltage Rating	AC 26/35kV
Conductor Material	Class 2 Stranded Pure Copper
Insulation	Triple-extruded XLPE (Conductor shield + XLPE + Insulation shield)
Metallic Shielding	Helical Copper Tape Shield
Sheath & Temps	Black PVC/ST2 \| Operating -15°C to 90°C
Applicable Standards	GB/T 12706.3, IEC 60228:2023, IEC 60811

Engineering Notes & Field Performance

Why pure copper for 35kV lines?

Current capacity and heat control. Plain and simple. When you're pushing 35kV through a main feeder line, you're usually moving serious wattage. Copper offers significantly lower resistance than aluminum, reducing $I^2R$ power loss under continuous heavy loads and keeping the overall cable diameter slimmer for tight duct spaces.

35kV-grade triple extrusion matters

The electrical stress inside a 35kV cable is intense. Even a microscopic air bubble between the insulation layer and the conductor can trigger partial discharge and ruin the line over time. We run the inner semi-con shield, high-grade XLPE insulation, and outer semi-con shield through a single extrusion head all at once. No air gaps, no void pockets-just clean, reliable insulation life.

Copper tape shield for electrostatic control

Instead of just a basic jacket, a spiral copper tape shield wraps around the insulation core. This contains the high radial electric field neatly inside the cable, keeping nearby control lines safe from interference while giving fault currents a quick, low-resistance exit path to ground if an emergency occurs.

Unarmored for smooth duct pulling

Not every underground cable needs heavy wire armor. When you're installing lines in concrete trenches or PVC/HDPE conduit, steel armor just adds dead weight and makes pulling around sharp elbows a nightmare. This unarmored structure stays flexible and slides through ducts easily, while the tough ST2 PVC outer jacket shields against moisture, soil chemicals, and jobsite wear.

Common Applications

Municipal 35kV grid distribution and main substation interconnects.
Underground duct and trench wiring in heavy industrial plants and data centers.
Connecting main power transformers in wind farms, utility solar sites, and primary switching stations.

Application

product-1200-800

Certificate

ISO Quality Management System Certificate

IEC 60502-1:2020, EN IEC 61000-6-1:2019,

EN IEC 61000-6-3:2021

certificate 05

1.Construction
S/N	Construction		Requirement
1	Conductor		2 Class 2 Copper Conductor
2	Insulation		+XLPE+Conductor shield, XLPE insulation and insulation shield triple extrusion
3	Metal shield		Copper tape shield
4	Sheath		PVC/ST2
2. Cable identification Core identification: Single core:natural color Sheath color: Black 3. Standard compliance GB/T 12706.3, IEC 60228:2023, IEC 60811
4.Application
S/N	Item				Technical requirement
1	Rated voltage				AC 26/35kV
2	Operating temperature				'-15~90℃
S/N	No. of cores × sectional area	Structure of conductor	Approx. dia. of conductor	Nominal thk. of insulation	Nominal thk.of sheath	Approx. OD of cable	Approx. weight of cable
	no.× sqmm	no./mm	mm	mm	mm	mm	kg/km
1	3×95	1+6+12	11.6	3.4	2.7	57.2±5.0	3545
5. Electrical characteristics
S/N	No. of cores × sectional area ×		Max. DC resistance of conductor@20℃ 20℃			Voltage withstand test
	no.× sqmm		Ω/km			kV/min,no breakdown
1	1×300		0.0601			65.0/30

Why Huayu Cable

Huayu Cable has been manufacturing wire and cable products since 2004. The company operates a production base of more than 258,000 m² and has developed 38 main product series with more than 8,000 specifications.

For medium-voltage cable projects, the benefit is not simply having different cable sizes available. A project may involve several cable types, different installation conditions and different certification requirements at the same time. Huayu's production, technical and sales teams can work together from the quotation stage to confirm the construction before the order enters production.

Huayu also maintains certification and testing capabilities covering a range of international and industry requirements, including ABS, CCS, DNV, LR, EAC/GOST, IEC, TÜV and CE, depending on the product and project specification.