Definition of Armoured electrical wire
Armoured electrical wire refers to a reinforced cable with a metal protective layer added
between the insulation layer and the outer sheath. Its core feature is that it forms a
mechanical protection barrier through metal materials such as steel strips and steel wires.
to the IEC 60502 standard definition, a complete armoured electrical wire should include
According a five-layer structure of conductor, insulation layer, inner sheath, armor layer,
and outer sheath. This special design makes armoured electrical wire the most reliable "
armored warrior" in the power transmission system, and the failure rate under complex
working conditions is reduced by more than 60% compared with ordinary cables.
Five typical features of armoured electrical wire
1. Structural protection advantages
The metal layer of armoured electrical wire can provide a tensile strength of ≥400N/mm²
(steel belt type) or ≥1500N/mm² (steel wire type). The measured data of a submarine
cable project shows that double-layer steel wire armoured electrical wire can withstand
a tensile load of 8 tons/meter.
2. Enhanced environmental adaptability
Galvanized steel belt armor combined with XLPE insulation allows the armoured electrical
wire to remain stable in the temperature range of -40℃~90℃ and in soil with a pH value
of 2-12.
3.Dynamic protection mechanism
The metal layer of the armoured electrical wire has the characteristic of "deformation
buffering". Shenzhen Metro monitoring data shows that it can absorb more than 60%
of the vibration energy and significantly reduce long-term micro-motion wear.
4.Electrical performance optimization
The armor layer reduces the cable capacitance by 20-30%. Tests of a certain UHV project
show that the partial discharge of a 1000kV armoured electrical wire is <5pC.
5.Easy installation and maintenance
Armored electrical wire allow a bending radius of 12 times the diameter (unarmored cables
require 20 times).
The value of armoured electrical wire
Armored electrical wire add a metal protective layer (such as steel belt or steel wire) to the
cable structure, giving it excellent protection in complex environments, and becoming a key
infrastructure of modern power systems. These cables are widely used in high-risk
industrial scenarios, significantly improving the reliability and safety of the system.
