RE4H1(O)RFR 12/20kV（24kV）Steel Wire Armoured MV Cable -

Applications

RE4H1(O)RFR 12/20kV (Um=24kV) Steel Wire Armoured Medium Voltage Cable

High-performance, flame-retardant medium voltage power cable with steel wire armour for industrial, utility and infrastructure applications. Compliant with IEC 60502-2, designed for reliable power distribution in harsh and demanding environments.

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Details

Overview

12/20kV（24kV） RE4H1(O)RFR Single Core Copper Cable

Parameter	Value
Nominal Voltage (Uo/U)	12/20kV
Maximum System Voltage (Um)	24kV
Power Frequency Test Voltage (50Hz, 15min)	42kV AC
Lightning Impulse Test Voltage (1.2/50μs)	125kV peak
Conductor Size Range	25–400mm² (1-core / 3-core)
Conductor DC Resistance (20°C)	≤0.741Ω/km (25mm²); ≤0.047Ω/km (400mm²)
Continuous Operating Temperature	-20°C to +90°C
Short-Circuit Temperature (≤5s)	+250°C
Minimum Bending Radius (Fixed Installation)	14× cable diameter (14D)
Approximate Weight (1-core, 95mm²)	~1100kg/km
Outer Diameter (1-core, 95mm²)	~38mm

Construction

RE4H1(O)RFR 12/20kV（24kV）Steel Wire Armoured MV Cable -

Conductor: Stranded bare copper, Class 2 (IEC 60228), compacted circular shape for optimal current carrying capacity
Inner Semiconductor Layer: Extruded semi-conductive compound (bonded), ensuring uniform electric field distribution
Insulation: Extruded XLPE (Cross-Linked Polyethylene), high dielectric strength and thermal resistance
Outer Semiconductor Layer: Extruded semi-conductive compound (strippable), facilitating easy termination
Metallic Screen: Helically applied copper tape (≥0.1mm thickness), providing effective shielding
Inner Sheath: PVC (ST2) bedding layer, protecting the armour and ensuring structural integrity
Armour: Galvanised steel wires (round wire armour), delivering robust mechanical protection
Outer Sheath: Flame-retardant PVC (ST2), available in red (RAL 3000, standard) or black color

Technical Data

Conductor Size (mm²)	1-Core Cable (A)	3-Core Cable (A)	Installation Method
25	115	95	Direct Burial / Duct
35	140	115	Direct Burial / Duct
50	170	140	Direct Burial / Duct
70	210	175	Direct Burial / Duct
95	250	205	Direct Burial / Duct
120	285	230	Direct Burial / Duct
150	325	260	Direct Burial / Duct
185	370	295	Direct Burial / Duct
240	435	345	Direct Burial / Duct
300	490	385	Direct Burial / Duct
400	575	450	Direct Burial / Duct

Applications

RE4H1(O)RFR 12/20kV (24kV) cable is engineered for fixed installations requiring high mechanical protection and flame retardancy. Typical applications include:

Underground and overhead power distribution networks
Industrial plants (factories, refineries, chemical plants, manufacturing facilities)
Utility substations (interconnections between transformers, switchgear and distribution lines)
Infrastructure projects (tunnels, bridges, pumping stations, airports, railways)
Renewable energy installations (solar farms, wind farms) for 24kV grid connections
Harsh environment installations (areas with mechanical stress, rodent activity or fire risk)