6-35kV extruded insulated power cable

The 6-35kV extruded insulated power cables produced by Shandong Yanggu Cable Group are commonly used in urban underground power grids, power station lead lines, internal power supply in industrial and mining enterprises, and underwater transmission lines across rivers and seas. The laying method can be buried underground, in the air, bridge, etc.

1. Product execution standards

1. GB/T 12706.2-2008 Extruded insulated power cables and accessories with rated voltage 1kV (Um=1.2kV) to 35kV (Um=40.5kV) Part 2: Rated voltage 6kV (Um=7.2kV) to 30kV (Um= 36kV) cable

2. GB/T 12706.3-2008 Extruded insulated power cables and accessories with rated voltage 1kV (Um=1.2kV) to 35kV (Um=40.5kV) Part 3: Cables with rated voltage 35kV (Um=40.5kV)

3. GB/T 19666-2005 General rules for flame-retardant and fire-resistant cables (only applicable to flame-retardant and fire-resistant cables)

2. Product characteristics

1. Conditions of use

Cable laying temperature: ≥0℃;

Maximum long-term operating temperature allowed for cable conductors: XLPE insulation 90°C;

The maximum working temperature of the cable during short circuit (maximum 5s): XLPE insulation, 250℃; PVC insulation, cross-sectional area ≤ 300mm², 160℃, cross-sectional area greater than 300mm², 140℃;

The minimum allowable bending radius of the cable: single-core unarmored 20D, single-core armored 15D, three-core unarmored 15D, three-core armored 12D. Note: D is the actual outer diameter of the cable.

2. Structural requirements

The basic structure of 6-35kV extruded insulated power cable consists of three parts: conductor, insulation layer and protective layer.

1) conductor

The conductor is made of twisted copper wire or aluminum wire and meets the requirements of GB/T 3956-2008 standard. A conductor is the conductive part of a power cable and is used to carry electrical energy

2) Insulation

Insulation is extruded PVC or XLPE. Electrically isolate the wire core from the earth and wire cores of different phases to ensure power transmission.

3) Outer sheath

The outer sheath is PE or PVC, and flame retardant, termite-proof, low-smoke low-halogen flame-retardant, low-smoke halogen-free flame retardant and other materials can also be provided according to customer requirements. Its function is to protect the power cable from the intrusion of external impurities and moisture, and to prevent direct damage to the power cable by external forces.

3. Product structure diagram, as follows.

4. Model description of 1kV extruded insulated power cable

Product code (omitted)

Characteristic code WDZ - low smoke halogen-free flame retardant; ZA (ZB, ZC) - flame retardant (A, B, C) level; NH - fire resistant;

Conductor material code

Type 2 copper conductor - (T) omitted; Type 5 copper conductor - R; Aluminum conductor - L

Insulation material code

YJ-cross-linked polyethylene insulation; V-polyvinyl chloride insulation; E-ethylene propylene rubber insulation; EY-hard ethylene propylene rubber insulation

Sheath material code

V-polyvinyl chloride sheath; Y-polyethylene or polyolefin sheath; F-elastomer sheath; Q-lead sheath

Armor material code

2-Double steel tape armor; 3-Fine round steel wire armor; 4-Thick round steel wire armor; 6-(Double) non-magnetic metal tape armor; 7-Non-magnetic metal wire armor

Outer sheath material code

2-Polyvinyl chloride sheath; 3-Polyethylene or polyolefin sheath; 4-Elastomer sheath

Common models