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What is the implementation standard of overhead insulated wire
Release time:
2022-09-01
The overhead insulated wire series is composed of compressed copper, aluminum (aluminum alloy) conductors, internal shielding layer, weather-resistant insulation material and external shielding layer. It has both the transmission power characteristics of the power line and the mechanical characteristics of the overhead cable. Compared with the exposed wires, the installation interval is small, the safety is high, and the atmospheric anti-aging performance is good.
The overhead insulated wire series is composed of compressed copper, aluminum (aluminum alloy) conductors, internal shielding layer, weather-resistant insulation material and external shielding layer. It has both the transmission power characteristics of the power line and the mechanical characteristics of the overhead cable. Compared with the exposed wires, the installation interval is small, the safety is high, and the atmospheric anti-aging performance is good.
1. use of overhead insulated conductors
Overhead insulated conductor products are a new series of products that supply power for overhead transmission lines. They prefer 10kV transmission lines for power grid construction and transformation. It is a kit for line maintenance and safety. Soft copper core products are suitable for transformer lower leads.
Standard for Implementation of 2. Overhead Insulated Conductors
1. 1KV overhead insulated cable: the GB12527-90 is the same as that of International Electrotechnical Commission IEC60502 and IEC227.
2. 10KV overhead insulated cable: the GB14049-93 is the same as the IEC60502 of the International Electrotechnical Commission.
Characteristics of 3. overhead insulated conductors
1. Rated voltage: 0.6/1KV, 10KV
2. The long-term allowable working temperature of the cable: PVC insulation is 70, and cross polyethylene insulation is 90.
3. Short circuit (no more than 5 seconds), high temperature of the cable: PVC insulation is 160, high density polyethylene insulation is 150, and cross polyethylene insulation is 250;
4. The cable layout is higher than the ambient temperature -20;
5. Allowable bending radius of cable:
(1) Cables with rated voltage below 1KV: when the cable outer diameter (D) is less than 25mm, it should be 4D or higher; when the cable outer diameter (D) is greater than 25mm, it should be 6D or higher.
(2) The rated voltage of 10KV cable is above 20(D). In the format: d-the actual outer diameter of the cable; d-the actual outer diameter of the cable conductor.
Model, name and purpose of 4. overhead insulated conductor
JKL copper conductor polyethylene insulated overhead cable
JKLY aluminum core polyethylene insulated overhead cable
JKYJ copper conductor XLPE insulated overhead cable
JKTRYJ Soft Copper Core XLPE Insulated Overhead Cable
JKLYJ aluminum core cross-linked vinyl insulated overhead cable
JKLHYJ Aluminum conductor XLPE insulated overhead cable
JKTRY soft copper core polyethylene insulated overhead cable
JKLHY high aluminum core polyethylene insulated overhead cable
Overhead fixed soft copper core products are used for transformer offline guidance; when installing cables, consider keeping a certain distance between the cable and the tree, and the cable and the tree can be in contact frequently when the cable is working.
JKLYJ/B soft core color XLPE insulated overhead cable
JKLHYJ/B aluminum core natural color XLPE insulated overhead cable
Need to consider overhead fixed routing, cable erection, cable and tree to maintain a certain distance, cable work cable and tree can often contact. JKLYJ/Q aluminum core lightweight XLPE insulated overhead cable
JKLYHJ/Q aluminum core light cross polyethylene insulated overhead cable
JKLY/Q aluminum core lightweight polyethylene insulated overhead cable
JKLHY/Q aluminum core lightweight polyethylene insulated overhead cable
Overhead fixed arrangement; when installing the cable, it should be considered that the cable and the tree should be kept at a certain distance, and the cable and the tree can be in contact for a short time when the cable is working.
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