10kV Overhead Insulated Cable

Product Name: 10kV overhead insulated cable

1-Implementation standards

GB/T14049-2008

2-Product Model

JKLY, JKLYJ, JKLYJ/Q, JKLYJ/B, JKLHY, JKLHYJ, JKYJ, JKTRYJ, etc.

3- Voltage level

10kV

4-Product Specifications

Number of cores

Specification

Copper conductor

Aluminum or aluminum alloy conductor

1

10 mm 2 ～400 mm 2

10 mm 2 ～400 mm 2

3

25 mm 2 ～400 mm 2

25 mm 2 ～400 mm 2

3+K (A) or 3+K (B)

25 mm 2 ～400 mm 2

K 25mm 2 ～120 mm 2

25 mm 2 ～400 mm 2

K 25mm 2 ～120 mm 2

Note 1: K is the load-bearing stranded wire. According to engineering technical requirements, the cross-section specified in the table can be selected to match the corresponding conductor cross-section.

When the span of the tower is larger and additional bearing cables are needed, such bearing cables are not included in the cable structure

Note 2: (A) indicates steel load-bearing stranded wire, and (B) indicates aluminum alloy load-bearing stranded wire.

5- Cable structure description

Cable structure

Material Description

Conductor

Round compacted (copper or aluminum or aluminum alloy) conductor

Conductor shield (if any)

Cross-linked or non-cross-linked semi-conductive materials

Insulation

High-density polyethylene or cross-linked polyethylene weather-resistant insulation material

Insulation shield (if any)

Cross-linked strippable semi-conductive material

6-Insulation identification

Insulation coloring identification:

The insulation color is black or natural. The phase sequence of the three-core cable insulation is identified by ridges, i.e., phase A has one ridge, phase B has two ridges, phase C has three ridges, etc., or according to customer requirements. The neutral core is marked with a different marking method than the above.

7-Special performance requirements

Weather resistance, UV resistance, etc.

8- Cable application characteristics

8.1 The maximum long-term rated temperature allowed for the cable conductor during normal operation:

High-density polyethylene: 75°C; cross-linked polyethylene: 90°C.

8.2 The maximum allowable temperature of the cable conductor during short circuit (duration not exceeding 5 seconds) is: high-density polyethylene insulation: 150°C; cross-linked polyethylene insulation: 250°C.

8.3 The temperature of cable installation should not be lower than -20℃

8.4 Minimum bending radius for cable installation:

Single-core cable: not less than 20 times the outer diameter of the cable;

Multi-core cable: not less than 15 times the outer diameter of the cable.

8.510kV overhead insulated cables are widely used in urban and rural power grid construction and upgrades to replace traditional bare conductors, reduce the risk of electric shock, improve safety, meet urban beautification needs, avoid the impact of bare conductors on the landscape, and achieve the effect of "invisible power grid".

8.5.1 When installing light and thin-insulated cables overhead, a certain distance should be maintained from trees. When the cables are in operation, only short-term contact between the cables and trees is allowed.

8.5.2 When installing natural insulated cables overhead, a certain distance should be maintained from trees. When the cables are in operation, frequent contact between the cables and trees is allowed.

8.5.3 The remaining 10kV overhead insulated cables shall be installed in fixed overhead locations. A certain distance from trees shall be maintained during installation. Frequent contact between the cables and trees is permitted during operation. In addition, soft copper core overhead insulated cables shall be used as transformer downlead.