Ⅰ. Introduction to Cold Shrink Joint
Cold shrink jonits are components that use high elastomer materials (commonly used silicone rubber and ethylene-propylene rubber) to be injection vulcanized in the factory, then enlarged and lined with plastic spiral supports to form various cable accessories.
Medium Voltage cold shrinkable cable joints products are suitable for 12/20kV PVC, XLPE, and EPR single-core, two-core, three-core, four-core, and five-core power cables. Cold shrinkable cable joints have the advantages of small size, easy and rapid operation, no need for special tools, wide application range and few product specifications. Compared with heat-shrinkable cable accessories, it does not require fire heating and is widely used in various fields such as electric power, petrochemicals, metallurgy, railways, and port construction.
Ⅱ. Features of Cold Shrink Joint
1. High-grade Insulation Material
Cold Shrink Joint uses the best cold-shrink material having high insulating properties. Dual prevention of electric leakage makes provision for safe power transmission.
2. Environmental Disturbance Resistance
The material used for cold-shrink has good weather resistance. It is able to resist any harsh conditions, whether it be high/low temperature and humidity or even UV exposure that would certainly lengthen the lifespan of the product.
3. Custom-made
Cold Shrink Joint arrangements can be provided to fulfill explicit client necessities, including various voltage appraisals and installation conditions, guaranteeing immaculate incorporation with your power framework.
4. Simple Installation and Support
Including a smoothed out plan and instinctive installation process, it fundamentally decreases installation time and costs. Furthermore, low maintenance prerequisites limit long haul functional costs.
5. Internationally Coordinated
Made in tight adherence to global quality rules and checked by key groups, it promises great output and safety, giving steady results.
Ⅲ. Electrical Performance Parameters of Cold Shrink Joint
NKS-15kVLSJ- | Items | Parameter |
Technical Parameters | Cable rated voltage | 12/20kV |
| Frequency withstand voltage(AC) | 54kV/5min |
Partial Discharge | 20kV＜10pC |
Impulse voltage | 125kV |
| Heating cycles test in air | 30kV, 60 cycles in total |
Applicable cable cross section | 25-630mm² |
The product has passed the inspection and certification of the China Electric Power Research Institute (CEPRI) Power Industry Electrical Equipment Quality Inspection and Testing Center
Type test reference standard: IEC 60502-4:2010 GB/T 12706.4-2008
Ⅳ. Selection Table for Cold Shrink Joint
| Product name | Nominal cross section (mm²) | Kit Code | Product Code |
3-core cold shrinkable joint | 35-70 | NKS-20kVLSJ-3/1 | 91801SCJ-SZ |
| 95-185 | NKS-20kVLSJ-3/2 | 91802SCJ-SZ |
| 240-400 | NKS-20kVLSJ-3/3 | 91803SCJ-SZ |
| 500-800 | NKS-20kVLSJ-3/4 | 91804SCJ-SZ |
Single core cold shrink joint | 35-70 | NKS-20kVLSJ-1/1 | 91805SCJ-SZ |
| 95-185 | NKS-20kVLSJ-1/2 | 91806SCJ-SZ |
| 240-400 | NKS-20kVLSJ-1/3 | 91807SCJ-SZ |
| 500-800 | NKS-20kVLSJ-1/4 | 91808SCJ-SZ |
