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Weather Resisting Insulated Over-Head Cables

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Weather resisting insulated over-head cables are used for city distributing grid. The products are safe with simple structure, with the advantage of simple construction, and excellent mechanical, physical and electrical property as well as fine performance of anti-creeping- discharge, rough-weather-adaptive and creepage proof. Compared with bare conductor, the product can be laid more closely to save the line gallery, and have less voltage-drop. Above all, the products installed reduce power accidents to insure lives safety.
The main technical parameter is enacted by Wuhan High Voltage Institute. the products are sold to more than 20 provinces, cities all around China and overseas countries such as Indonesia . Philippine and Thailand .
This products are used for alternating rated Voltage 1kV. 10kV. 35kV and below transmission and transformation lines.
(1). Standards
Produced according with GBl2527-90. GBl4049-93. SD237-87and Q09TDL004.
(2). Characteristic
1. The permissible continuous operating temperature:
PVC insulated cable :70℃;
Polyethylene insulated cable:70℃;
cross-link polyethylene insulatedcable: 90℃.
2. short-time maximum operating temperature: When short circuit(in 5 seconds)
PVC insulated cables:160℃;
Polyethylene insulatedcables: 130℃;
Cross-link polyethylene insulatedcables:250℃.
(3). The temperature of layouting cables may not be higher than -20℃.
(4). The environment temperature of cables could be -40℃.
Opposite humidity: May not be higher than 90 in wet weather .
(5). Permissible bending radius of cable:
rated Voltage0.61kVand below cables:
Cables diameter D<25mm. bending radius may not be higher than 4D.
Cables diameter D≥25mm. bending radius may not be higher than 6D.
rated Voltage10kV. 35kVcables:
single-corecables20(D+d)±5%mm
multicore cables15(D+d)±5%mm
D- Diameter of cable mm
D —Diameter of cable conductor mm
Delivery length :
Delivery length of cable may not be higher than 300m. Delivery length that Less than multiply of 50m and more than 10% of the whole length will be allowed in delivery. Any length can be allowed per agreement between both parties.
(6). How to order
Type . voltage . nominal section. standards and quantity will be indicated .
For example: Nominal Section is 185mm2. rated Voltage10kV copper-core weather resisting cross-link polyethylene insulatedover-head cables 10km can be indicated as :
JKYJ 10kV 1×185mm2 10km GBl4049-93.

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