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LT Power Cables

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LT Power Cables

LT Power Cables for Industrial and Domestic Use

Currency Cables Low Tension (LT) Power Cables are heavy-duty conductors engineered for reliable bulk power transmission in industrial plants, utilities, substations, and commercial infrastructure. Available with high-conductivity EC-grade aluminium or electrolytic-grade annealed copper conductors, these cables feature cross-linked polyethylene (XLPE) or high-grade PVC insulation. Built in compliance with IS 7098 (Part 1) and IS 1554 (Part 1), our power cables are protected with galvanized steel wire or flat strip armouring (GI) and a tough outer sheath, safeguarding against high mechanical stress, chemical soil attack, and direct burial wear.

Features & Key Benefits

High Thermal Overload Endurance: XLPE insulation supports continuous conductor temperatures of up to 90°C and short-circuit limits up to 250°C, increasing current-carrying capacity by up to 30%.
Heavy-Duty GI Armour Protection: High-tensile galvanized steel strip or wire armouring shields the internal cores from ground settling, heavy mechanical crushing, and rock penetration during direct burial.
Low Dielectric Losses: Compact circular or sector-shaped conductors minimize proximity and skin effects, delivering steady transmission efficiency across long distances.
Chemical & Moisture Impermeable: Extruded inner bedding and heavy-gauge outer jacketing prevent moisture ingress and resist damage from acidic, alkaline, or saline soils.
Flame Retardant Formulations: Outer sheathing available in FR and FRLS compounds designed with a high oxygen index to suppress flame propagation during emergency faults.

Technical Specifications Overview

Specification parameter Standard Rating value
Voltage Grade (Uo/U) Up to and including 1100 Volts (1.1 kV)
Standard Compliance IS 7098 (Part 1) for XLPE / IS 1554 (Part 1) for PVC / IS 8130
Conductor Construction EC-Grade H2/H4 Aluminium or Electrolytic Copper (Class 1/2, Solid or Stranded Compact Sector/Circular)
Core Configurations & Range 1 Core, 2 Core, 3 Core, 3.5 Core, and 4 Core (2.5 sq. mm to 630 sq. mm)
Armouring Options Galvanized Steel Strip (FY), Galvanized Round Wire (WY), or Aluminium Wire (Single Core)

Common Applications & Uses

  • Primary incoming LT feeder lines connecting distribution transformers to main LT switchboards.
  • Underground and trench-laid power networks for manufacturing facilities, steel mills, and processing plants.
  • Vertical risers and main power backbone runs for high-rise commercial towers, hospitals, and shopping malls.
  • Utilities, urban electrification schemes, and smart city underground distribution projects.
  • Central collection lines and inverter-to-transformer links in solar parks and wind energy installations.
Why Choose Currency Cables

Manufactured with 99.97% pure copper or high-grade EC aluminium, Currency LT Power Cables deliver up to 30% higher current-carrying efficiency, precision GI armouring, and zero-compromise dielectric strength backed by 30+ years of industrial trust.

Frequently Asked Questions

XLPE (Cross-Linked Polyethylene) insulation operates at higher continuous temperatures (90°C vs. 70°C for PVC) and handles short circuits up to 250°C (vs. 160°C for PVC). Because of this thermal endurance, XLPE cables support roughly 20% to 30% higher current ratings than equivalent PVC cables, providing superior overload protection and longer service life.

Galvanized Flat Strip Armour (FY) is standard for larger multi-core cables (typically 16 sq. mm and above) laid in underground trenches, ducts, or cable trays because it provides high surface protection against compressive soil loads and winds cleanly on drums. Round Wire Armour (WY) offers higher tensile pulling strength, making it ideal for smaller cables, vertical risers, or locations exposed to sharp external impacts.

Magnetic materials like steel wire cause inductive heating due to eddy currents when enclosing a single-core alternating current (AC) conductor. Non-magnetic aluminium wire armour eliminates these magnetic losses while preserving mechanical protection.

Yes. Our armoured LT power cables comply with IS 7098 (Part 1) and IS 1554 (Part 1) and are designed for direct burial. The combined assembly—extruded inner bedding, steel armouring, and an impermeable PVC or PE outer jacket—protects the conductor from stone punctures, moisture ingress, soil chemicals, and rodents.

Each production batch is evaluated in our internal testing facilities. Standard checks include Conductor Resistance Tests (per IS 8130), High-Voltage Water Bath Tests, Insulation Resistance Tests, Armour Dimensions & Tensile Strength Tests, and Oxygen/Smoke Index evaluations for flame-retardant outer jackets. Test certificates are provided with every shipment.

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