Cold shrink construction:
A cold shrink cable accessories reduce excessive human factors. During construction, as long as the plastic wire core inside is removed, the cold shrink can automatically shrink. During the shrinkage process, uneven shrinkage of the insulation pipe will not be caused by human factors. This ensures the quality of construction.
B Cold shrinkage is a process of contracting from one end to the other according to the program, which cannot be changed to ensure that no bubbles will appear during the contraction process.
C is used in hazardous situations in the petrochemical industry. Cold shrink construction avoids the use of heat sources and becomes safe.
Heat shrink construction:
The thermal shrinkage of A is greatly affected by the construction level. Uneven heating can lead to uneven shrinkage of the insulation pipe, and even some parts do not shrink at all, resulting in uneven shrinkage thickness. Thin areas are prone to breakdown and other problems.
During the heating process of thermal shrinkage, it is easy for insulation pipes to be burnt due to poor control of the heating degree, which greatly affects the insulation performance of the insulation pipes.
During the heating process, C thermal shrinkage can be heated from one end to the other or from the middle to both ends, which can easily lead to the formation of bubbles during the shrinkage process.
D is a place where the use of open flames and other heat sources is prohibited, such as in industries such as petrochemicals and chemicals. If the use increases the danger, it may lead to serious accidents.
During use
1) Cold shrink cable accessories will maintain synchronous breathing with the cable due to its thermal expansion and contraction, ensuring that the cable and accessories always maintain a good bonding state.
2) Heat shrink cable accessories will not change correspondingly with the thermal expansion and cooling of the cable, and long-term operation can easily cause gaps between the cable and accessories, leading to accidents.
Quality comparison
1) The inherent advantages of cold shrinkage have led to the continuous development of high voltage applications in the field of cold shrinkage cable accessories. Currently, there are already 110KV cold shrinkage cable accessories available.
2) The inherent drawbacks of heat shrink cable accessories make them hover below the 35KV voltage level for a long time, and at the 35KV voltage level, heat shrink cable accessories have become an important cause of frequent accidents during cable operation.