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Detection techniques of cold antifreeze cable

Information Source:Henan Huadong Cable Co., Ltd Release date:2014-03-21

North area of China, especially in Northeast China, the temperature will drop to minus ten degrees in winter, this kind of circumstance, the power cable general there is a short duration, cable outer sheath crisp, easy to crack, bending performance weakened many weaknesses in the construction time, construction force likely to cause material waste and the safe hidden trouble, great therefore, to use the special cold antifreeze cable.

China's national standards specified in the GB12706 experimental method for low temperature resistance test cable:
At -15 DEG C, by means of the power cable sheath material specimen, the elongation at break of not less than 20%,
At -15 DEG C, with 1kg weight from a height of 1 meters, the release of the impact on the cable sheath material, check whether the material surface crack.

In the GB50127-2007 "electric power engineering" GB50168-2006 "code for design of cable and electric equipment installation engineering code for construction and acceptance - cable line" in at the same time, polyvinyl chloride (PVC) power cable sheath when environment temperature should not be lower than 0 ℃, the use of the environment temperature is not lower than -15 ℃.

According to the national standard is not difficult to find, at present our country ordinary power cable using standard, which stays at the test conditions for the installation and use of -15 ℃, 0 ℃ stage, and for the cold antifreeze cable construction of northeast Inner Mongolia and northern cold areas and there is no specific guide data.

Huadong Co., Ltd believes that the international CSA22.2No.51-94 standards, environmental temperature low temperature resistance test of power cable is -40 ℃ and -25 ℃, compared with the national standard test methods to increase -40 ℃ on cold antifreeze cable body cold bending test, and the weight of cold impact test with increased from 1kg to 1.36kg, test conditions more severe.

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