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1. What are LV, MV and HV power cables?

Low, medium and high-voltage power cables refer to cables designed for different voltage levels. They are mainly classified by rated voltage: low-voltage (LV) cables are generally used for daily power supply, medium-voltage (MV) cables for urban power distribution and industrial systems, and high-voltage (HV) cables for long-distance power transmission. This classification ensures safe and efficient power transmission under different voltage conditions.

2. Structure, Performance and Application of LV/MV/HV Power Cables

Low, medium and high-voltage power cables differ in insulation structure, conductor material, voltage resistance and load capacity. Low-voltage cables feature simple structure and easy installation, suitable for construction, commercial and household projects. Medium-voltage cables have enhanced insulation, ideal for factories, communities and power distribution networks. High-voltage cables adopt advanced shielding and insulation, used for long-distance transmission and large power stations. They suit contractors, real estate developers, power grid companies and industrial enterprises, with operating temperatures usually ranging from -40℃ to 90℃.

2.1 LV (Low Voltage)

2.1.1Structure

Conductor: Copper,aluminum (solid,stranded)

Insulation: PVC, XLPE, PE Sheath: PVC, LSZH (low smoke zero halogen) .

Optional: Steel tape armor (for mechanical protection)

2.2.2 Main Performance

Low insulation thickness, simple processing

Good flexibility, easy installation High current-carrying capacity (suitable for small-to-medium loads)

Flame-retardant,halogen-free options for safety Operating temperature: -40℃~90℃

2.2.3 Application Fields

Residential,commercial building power supply

Industrial equipment wiring (machinery, instruments)

Indoor,outdoor power distribution networks

Solar,wind energy system connections

Municipal facilities (street lights, traffic signals)

2.2 MV (Medium Voltage)  ~35kV

2.2.1 Structure

Conductor: Stranded copper,aluminum (compact structure)

Insulation: XLPE (cross-linked polyethylene, mainstream) . Shielding: Conductor shield + insulation shield

Sheath: PE, PVC, or LSZH . Armor: Steel tape,steel wire (for underground/mechanical stress)

2.2.2 Main Performance

Excellent insulation performance, low dielectric loss

High voltage resistance, stable operation under medium loads

Weatherproof, moisture-proof, corrosion-resistant service life (≥30 years under normal use)

Operating temperature: -30℃~90℃

2.2.3 Application Fields

Urban power distribution networks (substation to communities,factories) .

Industrial parks and large-scale factory power supply

Underground and overhead power transmission Hospital, data center critical power systems Oil,gas field surface equipment wiring

2.3 HV (High Voltage)  5kV~500kV

2.3.1 Structure

Conductor: High-purity stranded copper (with anti-corrosion coating)

Insulation: XLPE (high-density) or mass-impregnated paper

Shielding: Inner semi-conductive shield + outer metal shield

Sheath: High-density PE (HDPE) + armor (steel wire for deep burial)

Additional: Water-blocking structure (for wet environments)

2.3.2 Main Performance

Ultra-high voltage resistance, low transmission loss .

Strong mechanical strength, suitable for long-distance transmission.

Excellent thermal stability, high short-circuit current capacity Resistance to chemical erosion and environmental aging.

Operating temperature: -20℃~90℃ (special grades up to 125℃).

3. What are the advantages of Taitong Cable?

Taitong Cable’s low, medium and high-voltage power cables have earned wide recognition for factory direct prices and superior quality, also can be customized of different cross-sections and industry-specific specifications in line with international and national standards. Taking customers’ interests as our priority, adhering to the global green environmental protection concept, and building on reputation and integrity, Taitong Cable provides a full range of reliable power cable solutions for customers around the world.