Factory-Direct Supply of Certified Wires and Conductors for Diverse Industrial Applications
Single Core 3.8/6.6KV Medium Voltage Aluminum Wire Armoured Cable
Voltage: 3.8/6.6kV (Um=7.2kV)
Conductor: Copper or aluminum, Class 2 to IEC 60228
Screen: Extruded semi-con + XLPE, 2.5-3.2mm + copper wire/tape screen
Inner Sheath: PVC separation layer
Armour: Round aluminium wires, 1.6-2.5mm (AWA)
Overall Sheath: PVC Type ST2, MDPE, or LSZH (BS 7835)
Installation: Indoor, outdoor, underground, cable ducts, water
Product Overview
Single Core 3.8/6.6kV (Um=7.2kV) MV Aluminium Wire Armoured Cable is an XLPE-insulated, copper screen, AWA power cable designed for direct burial, underground ducts, water immersion, and outdoor installations where the unarmoured single-core cable lacks adequate mechanical protection. At this voltage class — the lowest MV level — aluminium wire armour (AWA) is mandated because steel armour on a single-core AC circuit would suffer eddy current heating. The round aluminium wires provide crush and impact resistance without the magnetic penalty, making this the default single-core MV cable for generator connections, large motor feeders, and power station auxiliary circuits installed in harsh physical environments.
AWA vs Unarmoured: When Armour is Required
Cable Construction
1. Stranded Aluminum Conductor
2. Semi-conductor Screen
3. XLPE Insulation — 2.5-3.2mm, graduated
4. Copper Wire, Tape Screen
5. Inner PVC Sheath
6. Aluminum Wire Armor — Round wires, 1.6-2.5mm
7. Overall Sheath — PVC or MDPE (LSZH option)
Conductor
Copper: stranded Class 2. Aluminium: solid or stranded Class 2. Compacted circular. Per IEC 60228.
Semi-conductor Screen + XLPE Insulation
Extruded semi-conducting XLPE (inner) + XLPE insulation 2.5-3.2mm per cross-section. Triple-extruded for void-free bonding.
Copper Wire/Tape Screen
Combined copper wire and copper tape layer. Carries earth fault current and provides longitudinal water blocking. Cross-section per system fault level.
Inner PVC Sheath
Extruded PVC separation layer. Prevents galvanic corrosion between copper screen and aluminium armour. Essential for long-term buried cable reliability.
Aluminium Wire Armour
Round aluminium wires, 1.6-2.5mm diameter. Non-magnetic for single-core safety. Provides crush and impact protection per IEC 60502-2 mechanical tests.
Overall Sheath
PVC Type ST2 or MDPE, black, UV-stabilised. LSZH per BS 7835 for indoor public building installations. Extruded over the wire armour.
Technical Characteristics
| Rated Voltage U₀/U (Um) | 3.8/6.6kV (7.2kV maximum system voltage) |
| Insulation Thickness | 2.5mm (25-185mm²), 2.6mm (240), 2.8mm (300), 3.0mm (400), 3.2mm (500-630) |
| Max. Conductor Temperature | 90°C (continuous), 250°C (short-circuit, max 5s) |
| Min. Bending Radius | 12 × overall diameter |
| Armour | Round aluminium wires, 1.6-2.5mm (graduated per conductor size) |
| Metallic Screen | Copper wires + copper tape, combined (e.g., 16mm² for 25mm² conductor) |
| Sheath Options | PVC Type ST2, MDPE, or LSZH (BS 7835) |
| Installation Environments | Indoor, outdoor, underground, cable ducts, water |
Applicable Standards
| Standard | Scope |
|---|---|
| BS 6622 | British standard for XLPE insulated single-core cables 3.8/6.6kV to 19/33kV. Governs AWA armoured single-core cable construction and testing. |
| IEC 60502-2 | International standard for extruded cables 6kV-30kV. AWA armoured cables are tested to the mechanical and electrical requirements of this standard. |
| IEC 60332-1 | Flame non-propagation test for single cable. |
| BS 7835 | LSZH sheathed cables for fire-sensitive indoor installations (power stations, public buildings). |
| IEC 60228 | Conductor specification — Class 2 stranded copper and aluminium, compacted circular. |
Technical Specifications — Single Core 3.8/6.6kV AWA
XLPE insulation graduated by cross-section per BS 6622 / IEC 60502-2. Aluminium wire armour: 1.6mm (25-150mm²), 2.0mm (185-300mm²), 2.5mm (400-630mm²). Copper screen: combined wires + tape.
| Cross Section (mm²) | Insulation (mm) | Cu Screen (mm²) | Bedding (mm) | Armour Wire Dia. (mm) | Sheath (mm) | Overall Dia. (mm) | Weight Cu (kg/km) | Weight Al (kg/km) |
|---|---|---|---|---|---|---|---|---|
| 1 × 25 | 2.5 | 3.4 | 1.2 | 1.6 | 1.8 | 26.3 | 1,150 | 1,000 |
| 1 × 35 | 2.5 | 3.6 | 1.2 | 1.6 | 1.8 | 27.3 | 1,250 | 1,050 |
| 1 × 50 | 2.5 | 3.9 | 1.2 | 1.6 | 1.8 | 28.4 | 1,500 | 1,190 |
| 1 × 70 | 2.5 | 4.3 | 1.2 | 1.6 | 1.8 | 30.0 | 1,740 | 1,300 |
| 1 × 95 | 2.5 | 4.7 | 1.2 | 1.6 | 1.9 | 31.8 | 2,030 | 1,430 |
| 1 × 120 | 2.5 | 5.0 | 1.2 | 1.6 | 1.9 | 33.2 | 2,310 | 1,550 |
| 1 × 150 | 2.5 | 5.3 | 1.2 | 1.6 | 2.0 | 35.1 | 2,660 | 1,720 |
| 1 × 185 | 2.5 | 5.8 | 1.2 | 2.0 | 2.0 | 37.4 | 3,120 | 1,950 |
| 1 × 240 | 2.6 | 6.3 | 1.2 | 2.0 | 2.1 | 40.3 | 3,740 | 2,200 |
| 1 × 300 | 2.8 | 7.0 | 1.2 | 2.0 | 2.2 | 42.9 | 4,400 | 2,520 |
| 1 × 400 | 3.0 | 7.7 | 1.2 | 2.5 | 2.3 | 47.2 | 5,490 | 2,960 |
| 1 × 500 | 3.2 | 8.5 | 1.3 | 2.5 | 2.5 | 51.6 | 6,760 | 3,660 |
| 1 × 630 | 3.2 | 9.5 | 1.4 | 2.5 | 2.6 | 57.0 | 8,200 | 4,160 |
Packaging & Delivery
Export Wooden Drum
Fumigated wooden drums. AWA cables are heavier than unarmoured but lighter than SWA equivalents due to aluminium vs steel.
Moisture Protection
Factory-sealed cable ends with triple-layer heat-shrink caps and desiccant. AWA cables must be sealed — water ingress penetrates to armour layer and causes galvanic corrosion.
BS 6622 Documentation
PD test certificate, AC voltage test report, conductor resistance measurement, armour continuity test, material traceability.
Typical Applications — Single Core 3.8/6.6kV AWA
Power Station Generator Cables
Primary application. Generator to step-up transformer connections where underground duct routing requires mechanical armour. Aluminium wire prevents eddy currents.
Direct Burial & Underground Ducts
Single-core MV feeders in buried cable trenches and underground duct banks. AWA provides crush resistance against backfill and construction traffic.
Industrial Cable Trays
Outdoor and indoor cable trays in industrial plants. Armour protects against falling objects and accidental mechanical impact during maintenance activities.
Water Installation
Suitable for laying in fresh water. AWA + MDPE sheath combination provides long-term protection against water ingress and mechanical damage.
MV Motor Feeders (Protected Routes)
Large 6.6kV motor feeders where cable routing includes sections vulnerable to physical damage. AWA bridges the gap between unarmoured (indoor only) and full SWA (heavy and expensive).
Switchgear Interconnections
Inter-panel and inter-substation MV connections in power station and industrial switchgear buildings where armoured cable is specified for fire compartmentalisation.
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Frequently Asked Questions
As a factory, we offer flexible MOQ depending on the cable type. For standard stock items, MOQ is low; for customized specifications, please contact our sales team for a detailed quote.
Yes, Qiangli cables are manufactured in compliance with international standards such as UL, CE, TUV, and VDE. We provide full test reports and certificates upon request.
Absolutely. We have a dedicated R&D team that can customize cable structure, material, color, and printing to meet your specific project needs.
For standard products, lead time is usually 7-15 days. For large-scale project orders or customized products, it typically ranges from 20 to 30 days.
Yes, we provide free samples for most standard cables. You only need to cover the international courier costs. Contact us to arrange your sample shipment.