18/30(36)kV CU XLPE AWA/SWA PVC Armoured Cable

Application

Medium-voltage armoured cables (3.6/6kV ~ 18/30kV) are widely used in the following scenarios:

Municipal Power Grid: Urban main distribution lines, ring main circuits and power supply for residential & commercial zones, commonly laid directly underground, in cable trenches or municipal utility tunnels.

Industrial Facilities: Power feeders, main power circuits and interconnection lines in factories, petrochemical plants, metallurgical works, mines and power stations, resistant to mechanical stress and mild corrosion.

Large Public Buildings: Power connection between distribution rooms, box transformers and high-voltage cabinets in shopping complexes, hospitals, data centers and large buildings, installed on cable trays or in vertical shafts.

Transportation Hubs: Medium-voltage power supply for rail transit, airports, ports, logistics parks and gas stations, suitable for outdoor and semi-outdoor environments.

Harsh Environments: Buried sections vulnerable to rodent damage, compression and vehicle rolling, as well as coastal areas and sites with slightly acidic/alkaline soil

Characteristics

Voltage Rating Uo/U (Um)
18/30(36)kV

Temperature Rating:
Maximum operating temperature of conductor: +90℃
Ambient temperature for service: -15℃ ～ +55℃

Cable laying temperature:
Not lower than 0℃ (Preheat the cable if the ambient temperature is below 0℃).

Minimum Bending Radius During Laying
Single-core cable: 15D
Three-core cable: 12D
D refers to the actual outer diameter of the cable.

Laying Methods:
Conduit laying, trench laying, tunnel laying, shaft laying, cable tray laying, etc.

Products Construction

Conductor
Circular compacted copper conductor

Conductor Screen
Semi-conductive compound (for cross-section below 500mm²)
Semi-conductive tape+semi-conductive compound (for cross-section of 500mm² and above)

Insulation
Cross-linked polyethylene (XLPE)

Insulation Screen
Strippable semi-conductive compound

Metallic Screen
Copper tape
Copper wires

Filler
Non-hygroscopic filler ropes

Wrapping Tape
Non-hygroscopic binding tape

Armour
Single-core: Stainless steel wires
Three-core: Galvanized steel wires

Inner & Outer Sheath
90℃ PVC (Non-fire-retardant type)
90℃ Fire-retardant PVC (Fire-retardant type)

Core Identification
Single-core: None
Three-core: Colour tape

Sheath Colour
Black Red

Cable Drawing :

Applicable Standards

Optional

Technical Parameters

Dimensions

Electrical Characteristics

Single Core

Three Cores

Correction factors for ampacity

For single-core cables arranged in a trefoil formation, the cables are in contact with each other; when installed in ducts, the ducts are in contact with each other.

For single-core cables arranged in parallel with spacing, the axial distance between cables is 2 times the cable outer diameter.

For calculations under base conditions, the burial depth in soil is taken as 1.0 m, and the soil thermal resistivity is taken as 1.0 K·m/W.

Depending on the soil type, the corresponding soil conditions and meteorological conditions for different thermal resistivities are approximately as follows:

• 0.7: Soil condition: Very wet; Meteorological condition: Continuous rainfall
• 1.0: Soil condition: Wet; Meteorological condition: Normal rainfall
• 2.0: Soil condition: Dry; Meteorological condition: Infrequent rainfall
• 3.0: Soil condition: Very dry; Meteorological condition: Rare or no rainfall

The ducts are plastic pipes. (Assume the duct inner diameter is 1.5 times the cable outer diameter, and the duct wall thickness is 6% of the duct inner diameter.)

The metallic screen is not directly grounded at both ends.

FAQ