PVC Insulated Steel Tape Armoured Cable

  • According to IEC and GB Standard
  • XLPE & PVC Cable
  • Approved by ISO,CE, SGS
  • Place of Origin: Henan, China
  • In Stock
  • Number of Cores:1,2,3,4(3+1),5(4+1,3+2)
  • HS Code: 8544492100

Steel Tape Armoured (STA) cables are durable cables used primarily for power distribution in underground, outdoor, and industrial settings. They consist of copper or aluminum conductors, insulated layers, and a protective steel tape armouring. This armouring makes them resistant to physical damages and suitable for direct burial. Steel Tape Armoured cable ensure reliable electrical performance in both single-phase and three-phase systems and comply with international standards, including GB and ISO markings. Variants may include flame-retardant properties or enhanced moisture resistance. Correct installation considering bending radius and burial depth is crucial for their safety and effectiveness.STA cables are available for low voltage and medium voltage.

Steel Tape Armoured Cable Basic specification:

  • Conductor: Plain annealed copper Class 2
  • Insulation:XLPE PVC
  • Sheath Color: Black
  • Maximum Conductor Temperature: under normal (90℃), emergency (130℃) or short circuit no more than 5 s (250℃) conditions.
  • Min. Ambient Temp. 0℃, after installation and only when cable is in a fixed position
  • Min. Bending Radius: 15 x cable O.D for single core
  • 12 x cable O.D for  4 core

Steel Tape Armoured (STA) and Steel Wire Armoured (SWA) cables, while both serving the primary function of power distribution in demanding environments, exhibit distinct constructional and application-based differences.

  1. Constructional Variance:
    • STA Cables: These are characterized by their incorporation of steel tape armouring. The steel tape, applied in layers, encases the cable’s conductive and insulative components, providing a flat and uniform armour layer. This structure imparts significant rigidity to the cable.
    • SWA Cables: In contrast, SWA cables utilize steel wires for armouring purposes. These steel wires are helically wound around the cable, offering a more pliable armour layer compared to STA’s flat tape design.
  2. Mechanical Protection Efficacy:
    • STA: The steel tape in STA cables delivers superior protection against external impacts and crushing forces, making them particularly robust. However, this robustness comes at the cost of reduced flexibility.
    • SWA: The wire-based armouring of SWA cables, while also providing substantial protection, allows for greater flexibility. This characteristic is advantageous in installations requiring cable routing through complex paths.
  3. Application Suitability:
    • STA: Ideally suited for static applications where movement post-installation is minimal, STA cables are often preferred in underground installations and fixed power networks.
    • SWA: Given their enhanced flexibility, SWA cables find extensive use in dynamic environments, such as industrial applications or external installations where cables must navigate around obstacles.
  4. Weight and Installation Considerations:
    • STA: The rigidity and weight of STA cables can pose challenges in handling and installation, particularly in scenarios requiring cable bending or manoeuvring.
    • SWA: The comparative ease of handling SWA cables, attributable to their flexible nature, facilitates more straightforward installation, especially over uneven landscapes or in complex routing scenarios.
Cross Section
Stranding
Approx Weight
Approx Overall Diameter
Gland Size
Nom. Max. DC-resist conductor 20° C
Current rating laid direct
(mm²)
(mm)
KG/KM
(mm)
(mm)
(Ohm/km)
(Amp)
4 x 1.5
7/0.53
351
12.88
20s
12.1
32
4 x 2.5
7/0.67
429
14.43
20s
7.41
42
4 x 4.0
7/0.85
538
16.87
20
4.61
55
4 x 6.0
7/1.04
670
17.87
20
3.08
69
4 x 10
7/1.35
998
20.1
25
1.83
92
4 x 16
7/1.70
1,272
22.4
25
1.15
119
4 x 25
7/2.14
1,940
27
32
0.727
152
4 x 35
7/2.52
2,390
30.1
32
0.524
182
4 x 50
19/1.78
2,925
31.5
32
0.387
217
4 x 70
19/2.14
4,200
37.4
40
0.268
266
4 x 95
19/2.52
5,355
40.9
50s
0.193
319
4 x 120
37/2.03
6,925
46.6
50
0.153
363
4 x 150
37/2.25
8,200
50.2
50s
0.124
406
4 x 185
37/2.52
9,975
55.8
63s
0.0991
458
4 x 240
61/2.52
12,700
62.5
63
0.0754
529
4 x 300
61/2.85
15,275
67.4
75s
0.0601
592
4 x 400
61/3.20
19,875
77
75
0.047
667

An alternative to Steel Tape Armoured cable is the Steel Wire Armoured (SWA) cable. This type of cable serves a similar primary function in power transmission and distribution, but with a notable difference in its construction and mechanical properties. SWA cable is characterized by its use of helically wound steel wires as armour, rather than the flat steel tape used in STA cables.

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