Cold shrink technique:
No need for fire or special tools, just gently pull the wick and it will retract and attach closely to the cable, fitting various cable diameters with ease. Insulation reliability is guaranteed with liquid silicone rubber that maintains consistent radial pressure on the cable body. The insulation and electrical stress control unit are preformed together in the factory, reducing partial discharge and breathing with the cable body at all times. Stable performance is ensured by ultrasonic welding of the supporting tube, providing permanent tensile strength and lower deformation rate. Reliable sealing is achieved through coordination of the terminal body with cold shrink branch finger sleeve, insulation pipe, and terminal seal tube. The intermediate joint kits use a three-layer waterproof sealing technology that ensures excellent moisture resistance.
Easy for installation:
Simple installation, convenient operation, easy to master. Stripping distance is short and installation space demand is little while pretreatment of cable. Grounding method by using constant force spring to fix the earth lead without welding or tied copper wire, and one end of the ground has been compressed with terminal, more convenient installation, safe and reliable.
Widely Use:
Pollution resistance, ageing resistance, good hydrophobic, and have excellent corrosion resistance, cold resistance and resistance to ultraviolet ray, to ensure the long-term and stable performance usage. Especially suitable for high altitude, cold, damp, salt fog and heavy pollution areas
Main performance parameters of liquid silicone rubber material
| Serial No. | Item | Value | Test Standard | |
| Insulating silicone rubber | Conductive silicone rubber | |||
| 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% | ||
Reliable stress control method for cold shrink cable accessories
| At present, there are two kinds of stress control modes such as stress cone and stress pipe in the power cable accessories of 35 kV and below voltage. Using the method of stress cone alleviate stress concentration of electric field, it’s the most reliable and most effective method from the electrical point of view. Stress cone by cutting the insulation shield for outspread, make its form a trumpet-shaped, improved the distribution of electric field, reduce the electric field intensity of fracture surface of outside semi-conducting layer, maintain the operating life of the cable. It is also to use stress cone control method to homogenizing the electric field in the system of 110 kV or higher voltage. If choose the stress control tube method, the material dispersion is large of the stress control tube, disadvantages such as the product performance is not stable and the holding force is small between the accessories and cable insulation, etc. So we choose the high reliability of stress cone control mode. | |
Standard for the cold shrink cable assessories
GB11033 Basic echnical requirements of rated voltage not higher than 26/35 kV power cable accessories.
IEC60502 Insulated power cable and its accessories of rated voltage 1 kV to 30 kV.
GB5589 Test procedure of cable assessories.
GB9327 Test procedure of cable conductor compression and mechanical connection joint.
GB/T14315 Compression copper, aluminum terminal and connecting pipe for wire and cable conductors.
JB7829The Indoor and outdoor heat shrinkable type terminal for power cables of rated voltage not higher than 26/35 KV.
GB/T12706.4-2002 the fourth part of insulated power cable and its accessories of rated voltage 1 kV to 30 kV: test requirements for the power cable accessories of rated voltage 6 kV to 35 KV.
JB/T 10740-2007 Insulated power cable cold shrinkable type assessories of rated voltage 6kV (Um=7.2KV) to 35kV (Um=40.5KV) .
JB/T 8144-1995 Basic technical requirements for the power cable accessories of rated voltage not higher than 26/35KV.
GB311.1-1997 Insulation coordination for high-voltage transmission and transformation equipments.
GB/T 311.2-2002 Insulation coordination.
GB50150-2008 Acceptance test standard for electrical equipment installation engineering electrical equipment.
DL/T 620-1997 Overvoltage protection and insulation coordination for AC electrical equipment.
Application range of product
The application of our manufactured cold shrinkable series products:Rated voltage 0.6/1 kV, nominal section: 10-630 mm2 single core, two cores, three cores, four cores and five cores of cross-linked polyethylene insulated and rubber insulated power cable;
Rated voltage 8.7/10KV, 8.7/15KV, nominal section: 25-630 mm2;
Rated voltage 12/20KV, 18/20KV, nominal section: 25-400 mm2;
Rated voltage 21/35KV, 26/35KV, nominal section: 50-500 mm2;
Single core and three cores of cross-linked polyethylene insulated and
rubber insulated power cable.
Application environment and conditions
Level of environmental pollution: level IV polluted area;
The properties such as insulation level, current-carrying capacity, longterm working temperature and short circuit temperature, etc. all meet the technical requirements of supporting cables. Widely used in the industrials of electric power, petroleum, chemical
engineering, mine, railway, steel, etc. especially suitable for salt fog, severe cold, high humid-hot, and the occasions unfavorable use open flame.
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