LT Cable 1.1 kv LT 3.5core 35 mm Sq HT Armoured XLPE Cable

About LT Cable 1.1 kv LT 3.5core 35 mm Sq HT Armoured XLPE Cable

The cable described as "1.1 kV LT 3.5 Core 35 mm Sq HT Armoured XLPE Cable" has a contradiction in its terminology. While most of the description points to a specific type of Low Tension (LT) cable, the inclusion of "HT" (High Tension) is incorrect for a 1.1 kV rated cable.

Here's a detailed breakdown of what the correct description, 1.1 kV LT 3.5 Core 35 sq mm Armoured XLPE Cable, means:

Voltage Rating: 1.1 kV (Kilo-volts)

This indicates the cable is designed to handle a maximum voltage of 1,100 volts. This voltage level falls under the Low Tension (LT) category. LT cables are typically used for power distribution to end-users, such as homes, commercial buildings, and small to medium-sized industrial units. In contrast, High Tension (HT) cables are used for transmitting power over long distances at much higher voltages, typically starting from 11 kV (11,000 volts).

Core Configuration: 3.5 Core

This refers to the number and size of the electrical conductors within the cable.

• 3 Full Cores: These are the three-phase conductors (typically for Red, Yellow, and Blue phases) that carry the electrical current.

• 0.5 Half Core: This is the neutral conductor, which has a reduced cross-sectional area compared to the phase conductors. This design is common in applications where the load is expected to be relatively balanced, and the neutral conductor will carry a significantly lower current than the phase conductors.

Conductor Size: 35 mm Sq (Square Millimeters)

This specifies the cross-sectional area of each of the three main phase conductors. The size of the conductor determines its current carrying capacity; a larger area allows for a higher current flow. The neutral conductor in this 3.5 core cable would have a cross-sectional area of approximately half of this, around 17.5 sq mm.

Construction: Armoured

The term "Armoured" signifies that the cable has a protective layer, usually made of galvanized steel strips or wires, wrapped around the insulated conductors. This armouring provides several key advantages:

• Mechanical Protection: It safeguards the cable from physical damage, such as crushing, impact, or abrasion, making it suitable for direct burial in the ground or installation in rugged environments.

• Enhanced Safety: The armour can be earthed, providing an additional layer of safety.

• Pest Resistance: It offers protection against damage from rodents.

Insulation: XLPE (Cross-linked Polyethylene)

XLPE is a type of thermoset insulating material used to cover the conductors. It is known for its excellent properties:

• High Temperature Resistance: XLPE can withstand higher operating temperatures (up to 90C) compared to other common insulators like PVC. This allows the cable to have a higher current carrying capacity for the same conductor size.

• Superior Electrical Properties: It has high dielectric strength, which means it can withstand high electrical stress.

• Moisture and Chemical Resistance: XLPE offers good resistance to water and various chemicals, enhancing the cable's durability and lifespan.

In summary, the 1.1 kV LT 3.5 Core 35 sq mm Armoured XLPE Cable is a robust and reliable low-voltage power cable designed for three-phase power distribution in applications where a high degree of mechanical protection is required. It is commonly used in industrial plants, power stations, and for underground cabling to distribute power to residential and commercial areas.