Fully cold shrink cable joint

Application areas:

Widely used in the construction of 1-35kV power cable transmission and distribution network infrastructure

Product Description

A fully cold-shrink cable joint is a type of cable joint used at the splicing point of two cables to restore the cable's structure and function. Its main body is made of high-quality liquid silicone rubber, injection-cured in a factory, then expanded in diameter and lined with a plastic spiral support. Depending on the voltage level, it is available in 1kV, 8.7/15kV, 12/20kV, 18/30kV, and 26/35kV versions.

Full cold shrink technology: No open flame or special tools are required, and there is no trouble of gradually inserting it. Just gently pull out the core rope, and it will shrink back due to its own elasticity, thus attaching tightly to the cable and completing the installation.
Reliable insulation: Made with imported liquid silicone rubber, ensuring excellent insulation and high resilience. After installation, it always provides constant and lasting radial pressure to the cable body, with low partial discharge, and "breathes" with the cable body.
Excellent sealing: The combination of sealant and high-performance waterproof tape creates a three-layer waterproof structure consisting of the main body, inner sheath, and outer sheath, achieving long-term sealing and waterproofing.
Easy installation: Installation is simple, with low technical dependence on operation. Cable pretreatment requires a short stripping distance and minimal installation space. Grounding uses a constant force spring process, eliminating the need for welding or copper binding wire, making it faster and more reliable.
Wide range of applications: Different protective shells with different functions can be selected for external protection, giving the cable joints features such as corrosion resistance, resistance to mechanical impact, fire resistance, and explosion protection.

Product Parameters

The electrical performance of the product meets the requirements of IEC60502 and GB/J12706.4 standards.

Main electrical parameters:

Test Project	Standard requirements and test results
	8.7/15kV	12/20 kV	18/30 kV	26/35 kV
5-minute power frequency withstand voltage test	39kV	54kV	81kV	117kV
	No penetration, no flashover
Partial discharge test	15 kV	20 kV	30 kV	45 kV
	Undetectable discharge
Air load cycling test	22 kV	30 kV	45 kV	65 kV
	The conductor was heated to 95℃～100℃ and subjected to 30 cycles without breakdown or flashover.
Water load cycling test	22 kV	30 kV	45 kV	65 kV
	The conductor was heated to 95℃～100℃ and subjected to 30 cycles without breakdown or flashover.
Impulse voltage test	95 kV	125 kV	170 kV	200 kV
	Ten tests each for positive and negative polarities were conducted; no breakdown or flashover was observed.
Maximum allowable temperature during normal operation	90℃	90℃	90℃	90℃
Maximum permissible temperature during short circuit	250℃	250℃	250℃	250℃

Electrical parameters of 0.6/1kV products:

Testing items	Standard requirements	in conclusion
5-minute power frequency withstand voltage test	8kV, no breakdown	pass
4-hour power frequency withstand voltage test	7.2KV, no breakdown	pass

Wolong Electric is committed to continuous product improvement, therefore we reserve the right to change designs, dimensions, and data without prior notice.

Product Selection  

Selection Table for 6-35kV Cold Shrink Joints

0.6/1kV Cold Shrink Joint Product Selection Table: