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27.5kV cold shrink joint
27.5kV cold shrink joint
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Application areas:
It is used in 27.5kV traction power supply systems for electrified railways, installed at the joint of two 27.5kV single-phase AC cross-linked polyethylene insulated cables to achieve electrical connection between the two cables.
Product Description
1. Product performance meets the requirements of GB/T28427-2012 standard. 2. The intermediate joint body uses high-quality imported liquid silicone as the base material and is molded using a high-temperature, high-pressure injection process. The product has excellent properties such as high elasticity, high tear resistance, aging resistance, corona resistance, and creepage resistance; its optimized structural design and excellent installation process meet the requirements of the special power supply environment and operating characteristics of electrified railways.
3. The intermediate joint body has a built-in pre-expansion support. During installation, after properly handling the cable body as required, the support can be spirally pulled out to shrink and press it onto the cable, making on-site installation convenient and quick.
Product Parameters
| Implementation Standards | GB/T28427-2012 |
| Rated voltage U0 (kV) | 27.5 |
| Power frequency withstand voltage (5min) (kV) | 124 |
| Impact withstand voltage (kV) | 250 |
| Partial discharge level (pC) at 48kV | ≤5 |
| Cold shrink terminal body creep distance (mm) | ≥800 |
| Applicable cable cross-section (mm2) | 150/185/240/300/400 |
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