26/35kV Fire Resistant Armoured Power Cable CU/XLPE/CWS/STA/PVC Three Core
| Voltage: | 26/35kV | Conductor: | Copper |
| Insulation: | XLPE | Screen: | Coppper Wire |
| Armoure: | Steel Tape Armoured | Jacket: | FR-PVC |
| Feature: | Fire Resistant | Core No: | Three |
26/35kV Fire Resistant Armoured Power Cable CU/XLPE/CWS/STA/PVC Three Core
Product Overview
The 26/35kV CU/XLPE/CWS/STA/PVC three core fire resistant armoured cable is designed for medium voltage power systems where safety and reliability cannot be compromised. It is commonly used in substations, underground networks, industrial plants, tunnels, and EPC projects that require stable power transmission under harsh operating conditions.
The cable uses XLPE insulation for strong electrical and thermal performance, a copper wire screen (CWS) for field control, and steel tape armour (STA) to protect against mechanical impact. The outer PVC sheath provides additional protection against moisture and abrasion.
It is suitable for direct burial, cable trenches, and duct installation, especially in environments where fire safety and system continuity are important.
Application
This cable is typically used in:
-
Substation power distribution systems
-
Industrial plants and heavy manufacturing facilities
-
Underground urban power networks
-
Metro and tunnel projects
-
Mining and oil & gas installations
-
EPC infrastructure projects
In mining and industrial environments, the cable is often selected for its ability to handle:
-
Mechanical stress
-
Moisture exposure
-
Fire risk areas
-
Continuous power demand
Construction
· Conductor: Stranded copper conductor
· Conductor Screen: Semi-conductive layer for electric field control
· Insulation: XLPE with stable thermal and dielectric performance
· Insulation Screen: Semi-conductive layer for uniform field distribution
· Metallic Screen: Copper wire screen for grounding and fault current path
· Armour: Galvanized steel tape armour (STA) for high tensile strength and mechanical protection
· Fillers: To maintain circular cable shape and stability
· Outer Sheath: PVC (ST2), resistant to moisture and abrasion
Operating Conditions
-
Operating temperature: -20°C to +90°C
-
Short-circuit temperature: up to 250°C (max. 5 seconds)
-
Minimum bending radius: 15 × overall diameter
-
Suitable for underground direct burial
Specification
| No.of Cores and Nominal Cross Section (mm²) | Nominal Insulation Thickness (mm) | Nominal Steel Wire Diameter (mm) | Nominal Sheath Thickness (mm) | Approx. Overal Diameter (mm) | Approx. Weight (kg/km) | Max. DC Resistance of | ||
| Conductor at 20℃ (Ω/km) | ||||||||
| Cu | Al | Cu | Al | |||||
| 3×50 | 8 | 3.15 | 3.5 | 81.1 | 9605 | 8742 | 0.387 | 0.641 |
| 3×70 | 8 | 3.15 | 3.6 | 85.2 | 10701 | 9453 | 0.268 | 0.443 |
| 3×95 | 8 | 3.15 | 3.7 | 89.2 | 11990 | 10259 | 0.193 | 0.32 |
| 3×120 | 8 | 3.15 | 3.8 | 92.2 | 13154 | 10964 | 0.153 | 0.253 |
| 3×150 | 8 | 3.15 | 3.9 | 95.9 | 14690 | 11985 | 0.124 | 0.206 |
| 3×185 | 8 | 3.15 | 4.1 | 100 | 16324 | 12916 | 0.0991 | 0.164 |
| 3×240 | 8 | 3.15 | 4.2 | 105.3 | 18603 | 14180 | 0.0754 | 0.125 |
| 3×300 | 8 | 3.15 | 4.4 | 110.7 | 21139 | 15595 | 0.0601 | 0.1 |
| 3×400 | 8 | 3.15 | 4.6 | 117.3 | 24818 | 17675 | 0.047 | 0.0778 |
| 3×500 | 8 | 3.15 | 4.8 | 125.4 | 29075 | 20009 | 0.0366 | 0.0605 |
| 3×630 | 8 | 3.15 | 5.1 | 134.2 | 34299 | 22527 | 0.0283 | 0.0469 |
Fire Resistant Performance
This cable is designed to maintain circuit operation under fire conditions for a defined period, which is critical in:
-
Emergency power systems
-
Tunnel ventilation and safety systems
-
Substation control circuits
-
Industrial shutdown systems
The construction helps slow flame spread and maintain electrical integrity during abnormal conditions.
Engineering Advantages
-
Strong mechanical protection from STA armour
-
Stable electrical performance with XLPE insulation
-
Good screening performance with copper wire screen
-
Suitable for underground and high-risk installations
-
Long service life in industrial environments
-
Low maintenance after installation
Quality & Testing
Each production batch is tested before delivery, including:
-
High voltage test
-
Conductor resistance test
-
Insulation and sheath inspection
-
Fire resistance performance check
Certificates and test reports can be provided for project approval when required.
FAQ
Q1: What is the main difference of fire resistant cable?
It can continue working for a certain time during fire, helping critical systems stay powered.
Q2: Can it be installed underground?
Yes. The STA structure is designed for direct burial and underground use.
Q3: Where is this cable usually used?
It is commonly used in substations, tunnels, industrial plants, and EPC projects.
Q4: What is the service life?
Normally 25–30 years depending on installation and operating conditions.
Q5: Is it suitable for mining projects?
Yes, it is often used in mining power distribution due to its mechanical strength and durability.
0.6/1kV Copper PVC Insulated PVC Sheathed Fire Resistant Cable – Flexible Power Cable (VV-FR / NH-VVR)
0.6/1kV Copper PVC Insulated PVC Sheathed Fire Resistant Cable – Flexible Power Cable (VV-FR / NH-VVR) Product Overview The VV-FR / NH-VVR cable is a flexible, fire-resistant power cable rated at 0.6/1kV. It features copper conductor, PVC insulation, and PVC sheath with enhanced fire-resistant ...
0.6/1kV 3+1 Core Fire Resistant Cable | IEC 60331 FR XLPE Insulated Power Cable for Emergency Systems
0.6/1kV 3+1 Core Fire Resistant Cable | IEC 60331 FR XLPE Insulated Power Cable for Emergency Systems 1. Product Overview The 0.6/1kV 3+1 core fire resistant cable is designed to maintain circuit integrity during fire conditions, ensuring continuous power supply to critical systems such as fire ...
0.6/1kV Fire Resistant Cable CU/LSZH/LSZH EN 60332-3-24
0.6/1kV Fire Resistant Cable CU/LSZH/LSZH EN 60332-3-24 Application A low-voltage fire-resistant power cable with LSZH insulation and sheath. The cable is widely used in places where fire safety is critical, such as commercial buildings, hospitals, airports,metro stations, shopping malls, schools ...
Armoured Fire Resistant Cable 3+1 Core Cu/XLPE/PVC/SWA/PVC for Underground Application
Armoured Fire Resistant Cable 3+1 Core Cu/XLPE/PVC/SWA/PVC for Underground Application Description Electrical power cable with copper conductors, XLPE insulation, PVC bedding, galvanized steel wires armour (SWA) and PVC outer sheath Application Multi-core PVC cable with steel wire armour (SWA). ...
