4E-NRS, 4E-WRS, 4E-JRS Heat Shrinkable Cable Accessories
4E-NRS, 4E-WRS, 4E-JRS heat shrinkable cable accessories is applied to 35kV and below rubber cable. Heat shrinkable cable accessories is using import multi-phase polymer, it's the update products of wrapped type cable accessories. With convenient installation, keep on suitable radial pressure on the cable body, interface characteristic is good. the parameter type stress control tube to improve the distribution of the electric field, which can effectively solve the cable outer shield section in electric stress concentration problem. The electrical properties are improved from wrapped type cable accessories to ensure the safety and reliable operation. The main components are tubular, basically including stress tube, insulation tube, three fingered tube, sealed tube protective sleeve, etc
Technical performance: meet BS EN 50181, IEC60502, GB/T12706 requirements.
Heat shrinkable raw materials: stress tube is parameter type, well-distributed electric field at the insulating cable cut off place. Insulating tube has insulation effect, protective sleeve has protection effect. Product heat shrinkable is quite stable, can shrinkable to the original size in heating condition, the residual deformation is small. All the products are processing forming in the factory. There's no need to use fire, no special training, installation is simple and fast.
It has resistance to filth, aging, and good waterproof, with superior cold heat resistant performance.
Surface is smooth and beautiful.
Heat shrinkable indoor, outdoor termination, and joint electrical performance parameters
| Item | Requirement |
| 8.7/15 (17.5) | 12/20 (24) | 26/35 (40.5) |
| 5min Power frequency voltage test | 39kV, no flashover, no breakdown | 54kV, no flashover, no breakdown | 117kV, no flashover, no breakdown |
| Partial discharge test | 15kV discharge capacity≤10pC | 20kV discharge capacity≤10pC | 45kV discharge capacity≤10pC |
| Lightning impulse test | 95kV | 125kV | 200kV |
| 10 times of positive and negative, no flashover, no breakdown |
| Constant voltage load cycle test in air | 22kV | 30kV | 65kV |
| The conductor is heated to 95-100ºC, each cycle is 8h, heating 5h and cooling 3H for 60 cycles. |
| Partial discharge test at high temperature | 15kV discharge capacity≤10pC | 20kV discharge capacity≤10pC | 45kV discharge capacity≤10pC |
| 15min AC voltage withstand test | 22kV, no flashover, no breakdown | 30kV, no flashover, no breakdown | 65kV, no flashover, no breakdown |
| Negative DC voltage test | 52kV, no flashover, no breakdown | 64kV, no flashover, no breakdown | 156kV, no flashover, no breakdown |
| 4H power frequency voltage test | 35kV, no flashover, no breakdown | 48kV, no flashover, no breakdown | 104kV, no flashover, no breakdown |
| Outdoor termination salt spray test 1000h | 11kV, no flashover, no breakdown | 15kV, no flashover, no breakdown | 32.5kV, no flashover, no breakdown |
| Indoor termination humidity test 300h | 11kV, no flashover, no breakdown | 15kV, no flashover, no breakdown | 32.5kV, no flashover, no breakdown |
