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JLS-15/3*50
The 8.7/15KV Full Cold Shrink Cable Joint Kit is designed for cable connection and insulation reinforcement in medium-voltage power distribution systems. Adopting full cold shrink technology and liquid silicone rubber materials, it maintains stable performance in harsh operating environments and requires no open flame during installation, fitting commercial procurement demands in electric power, petrochemical, mining and other industrial fields.
This kit applies full cold shrink technique, which requires no fire work or special tools on construction sites. Operators only need to pull the inner wick gently, and the component will retract by its own elasticity to attach closely to the cable surface. Each specification adapts to multiple cable diameters, with strong compatibility for different cable sizes. The design also reduces required installation space and shortens cable stripping length during pretreatment, supporting smooth installation in narrow construction spaces.
The insulation main body is made of liquid silicone rubber, with stable insulation performance and high elasticity. After installation, the component maintains constant radial pressure on the cable body, and adapts to the thermal expansion and contraction movement of the cable simultaneously. The insulation main body and electrical stress control unit are preformed as a whole in factory, with low partial discharge level during long-term operation. For electric field optimization, this product adopts stress cone structure. This structure extends the insulation shield into a trumpet shape, which improves electric field distribution and reduces electric field intensity at the fracture surface of the outer semi-conducting layer. Compared with stress control tube method, the stress cone design avoids performance instability caused by material dispersion, and maintains steady holding force with cable insulation.
The supporting tube of the kit uses ultrasonic welding process, which ensures structural stability, lasting tensile performance and low deformation rate. For sealing performance, the terminal body matches with cold shrink branch finger sleeve, cold shrink insulation pipe and cold shrink terminal seal tube. The intermediate joint kits apply three-layer waterproof sealing technology to achieve moisture resistance. For grounding installation, the kit uses constant force spring to fix the earth lead, without welding or tied copper wire. One end of the ground wire is pre-compressed with terminal, which simplifies installation steps and ensures steady grounding effect.
Serial No. | Item | Insulating silicone rubber | Conductive silicone rubber | Test Standard |
1 | Hardness JIS A | 40±5 | 40±5 | GB/T531 |
2 | Tensile strength Mpa | ≥ 6.5 | ≥ 6.5 | GB/T528 |
3 | Elongation at break % | ≥ 650 | ≥ 650 | GB/T528 |
4 | Tearing strength N/mm | ≥ 30 | ≥ 30 | GB/T529 |
5 | Volume resistivity | ≥ 5.0×10^14 | ≤ 1.5×10^3 | GB/T1692 |
6 | Permittivity (50MHZ) | 2.8-3.5 | - | GB/T1693 |
7 | Dielectric loss tangent value | ≤ 0.01 | - | GB/T1693 |
8 | Anti-tracking | ≥ 1A3.5 | - | GB/T6553 |
9 | Dielectrical strength KV/mm | ≥ 26 | - | GB/T1695 |
10 | Tensile set | ≤ 10% | - | - |
The product has passed a series of electrical performance tests under standard requirements. The test results for different voltage levels are shown as follows:
Test Item | Standard requirements | Test results | ||
8.7/15kV | 12/20kV | 26/35kV | ||
Power frequency voltage withstand test (5 min) | 39kV, No flashover and puncture | 54kV, No flashover and puncture | 117kV, No flashover and puncture | No flashover and puncture |
Outdoor terminal power frequency voltage test (rain, 1 min) | 35kV, No flashover and puncture | 48kV, No flashover and puncture | 104kV, No flashover and puncture | No flashover and puncture |
Partial discharge test at room temperature | Partial discharge ≤ 10pC at 15kV | Partial discharge ≤ 10pC at 20kV | Partial discharge ≤ 10pC at 45kV | Partial discharge < 5pC |
Lightning impulse voltage test (95-100°C) | 95kV | 125kV | 200kV | No flashover and puncture |
Conductor heating to 95-100°C, positive and negative polarity 10 times each, no flashover and puncture | ||||
Constant pressure load cycling test (in the air, 3 cycles) | 23kV | 30kV | 65kV | By the following test evaluation |
Conductor heating to 95-100°C, each cycle for 8 h (5 h heating, 3 h cooling), total 3 cycles | ||||
Partial discharge test under high temperature | 15kV | 20kV | 45kV | Partial discharge < 5pC |
Conductor heating to 95-100°C, partial discharge ≤ 10 pC | ||||
Constant pressure load cycling test (in the air, 60 cycles) | 23kV | 30kV | 65kV | By the following test evaluation |
Conductor heating to 95-100°C, each cycle for 8 h (5 h heating, 3 h cooling), total 60 cycles | ||||
Partial discharge test after load cycling | 15kV | 20kV | 45kV | Partial discharge < 5pC |
Conductor heating to 95-100°C, partial discharge ≤ 10 pC | ||||
Lightning impulse voltage test after load cycling | 95kV | 125kV | 200kV | No flashover and puncture |
Positive and negative polarity 10 times each, no flashover, no puncture | ||||
AC withstand voltage test (15 min) | 23kV, No flashover and puncture | 30kV, No flashover and puncture | 65kV, No flashover and puncture | No flashover and puncture |
Outdoor terminal salt spray test (1000 h) | 11kV, No flashover and puncture | 15kV, No flashover and puncture | 32.5kV, No flashover and puncture | No flashover and puncture |
Indoor terminal moisture test (300 h) | 11kV, No flashover and puncture | 15kV, No flashover and puncture | 32.5kV, No flashover and puncture | No flashover and puncture |
This product complies with multiple national and international standards for power cable accessories, including GB11033, IEC60502, GB5589, GB9327, GB/T14315, GB/T12706.4-2002, JB/T 10740-2007, JB/T 8144-1995, GB311.1-1997, GB50150-2008 and DL/T 620-1997.
Serial No. | Product name | Product spec model | Applicable cable cross-section (mm²) |
1 | 8.7/15kV Cold shrinkable 3 cores joint kit | JLS-15/3×25 | 25 |
2 | 8.7/15kV Cold shrinkable 3 cores joint kit | JLS-15/3×35 | 35 |
3 | 8.7/15kV Cold shrinkable 3 cores joint kit | JLS-15/3×50 | 50 |
4 | 8.7/15kV Cold shrinkable 3 cores joint kit | JLS-15/3×70 | 70 |
5 | 8.7/15kV Cold shrinkable 3 cores joint kit | JLS-15/3×95 | 95 |
6 | 8.7/15kV Cold shrinkable 3 cores joint kit | JLS-15/3×120 | 120 |
7 | 8.7/15kV Cold shrinkable 3 cores joint kit | JLS-15/3×150 | 150 |
8 | 8.7/15kV Cold shrinkable 3 cores joint kit | JLS-15/3×185 | 185 |
9 | 8.7/15kV Cold shrinkable 3 cores joint kit | JLS-15/3×240 | 240 |
10 | 8.7/15kV Cold shrinkable 3 cores joint kit | JLS-15/3×300 | 300 |
11 | 8.7/15kV Cold shrinkable 3 cores joint kit | JLS-15/3×400 | 400 |
12 | 8.7/15kV Cold shrinkable 3 cores joint kit | JLS-15/3×500 | 500 |
13 | 8.7/15kV Cold shrinkable 3 cores joint kit | JLS-15/3×630 | 630 |
14 | 8.7/15kV Cold shrinkable 1 core joint kit | JLS-15/1×25 | 25 |
15 | 8.7/15kV Cold shrinkable 1 core joint kit | JLS-15/1×35 | 35 |
16 | 8.7/15kV Cold shrinkable 1 core joint kit | JLS-15/1×50 | 50 |
17 | 8.7/15kV Cold shrinkable 1 core joint kit | JLS-15/1×70 | 70 |
18 | 8.7/15kV Cold shrinkable 1 core joint kit | JLS-15/1×95 | 95 |
19 | 8.7/15kV Cold shrinkable 1 core joint kit | JLS-15/1×120 | 120 |
20 | 8.7/15kV Cold shrinkable 1 core joint kit | JLS-15/1×150 | 150 |
21 | 8.7/15kV Cold shrinkable 1 core joint kit | JLS-15/1×185 | 185 |
22 | 8.7/15kV Cold shrinkable 1 core joint kit | JLS-15/1×240 | 240 |
23 | 8.7/15kV Cold shrinkable 1 core joint kit | JLS-15/1×300 | 300 |
24 | 8.7/15kV Cold shrinkable 1 core joint kit | JLS-15/1×400 | 400 |
25 | 8.7/15kV Cold shrinkable 1 core joint kit | JLS-15/1×500 | 500 |
26 | 8.7/15kV Cold shrinkable 1 core joint kit | JLS-15/1×630 | 630 |
This cable joint kit adapts to level IV polluted areas. Its insulation level, current-carrying capacity, long-term working temperature and short circuit temperature meet the technical requirements of matching cables. The product has hydrophobic behavior, and maintains stable performance in pollution, cold, heat, salt fog and ultraviolet exposure conditions. It is especially suitable for high altitude, cold, damp areas, salt fog and heavy pollution areas. It is widely used in electric power, petroleum, chemical engineering, mine, railway, steel and other industrial fields. Since no open flame is required during installation, it fits workplaces with flammable and explosive risks.
This kit fits cross-linked polyethylene insulated and rubber insulated power cables, including both single core and three core structures. For 8.7/15kV voltage level, the applicable cable cross-section ranges from 25 mm² to 630 mm².
Yes. The full cold shrink installation process requires no open flame or hot work, which makes the product suitable for petroleum, chemical, mining and other flammable and explosive industrial scenarios.
This product adopts stress cone structure for electric field stress control. This design optimizes electric field distribution at the cable shield cut-off point, and delivers more stable performance compared with stress control tube solutions.
For commercial procurement demands, users can confirm cable parameters and corresponding models before ordering. Customized configuration for specific application scenarios is also available upon request. This 8.7/15KV Full Cold Shrink Cable Joint Kit provides a stable cable connection solution for various industrial operations.
