Different Types Of Underground Power Cable In Blacktown

Underground cables are used in power applications where it is impractical, difficult, or dangerous to use overhead power lines. They are widely used to power consumer facilities from densely populated urban areas, factories, and even overhead stanchions. Underground electric power cables have several advantages over overhead power lines. It has a small voltage drop, is less likely to fail, and has lower maintenance costs. However, the manufacturing cost is high, and the cost may vary depending on the structure and rated voltage.

Underground Cables Are Classified In Four Ways, Based On Their

  • Voltage capacity
  • Construction
  • Insulation of cable

Classification Based On Voltage

  • LT cable: Low voltage cable with a maximum capacity of 1000V
  • HT cable: High voltage cable up to 11KV
  • ST cable: Super tension cable rated at 22 KV to 33 KV
  • EHT cable: Ultra-high voltage cable rated at 33 KV to 66 KV
  • Additional super voltage cable: Maximum voltage rating exceeds 132KV

Classification Based On Construction

  • Cable with belt: Maximum voltage 11KVA
  • Shielding cable: Maximum voltage 66 KVA
  • Pressure cable: Maximum voltage of 66KVA or more
Classification Based On The Insulation Of Cable

  • PVC Type A: 75°C
  • PVC Type B: 85°C
  • PVC Type C: 85°C
  • XLPE: 90°C
  • Rubber: 90°C
  • Rubber- EPR IE-2, EPR IE-3, EPR IE-4, SILICON IE-5: 150°C

Classification Based On Installation And Laying

  • Direct Burial: As the name implies, the conductor is buried beneath the trench without any additional accessories.
  • Trough: A concrete trough is dug, and cables are attached. They are displayed on the surface. It is easy to maintain.
  • Tunnel: A tunnel may be dug for this purpose. Such construction is mainly used when it is necessary to cross a river or when the intended distribution is to a large city. Maintenance and future expansion are easy, but the initial cost is high.
  • Gas Isolated Line: This is a relatively new technology. For cables that operate at higher voltages and currents and handle higher power, such gas-insulated line structures are safer—currently used in advanced projects.
Location: Pitt Town NSW 2756, Australia

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