Cold Shrink Sleeve EPDM Tubing Sizes Heat Tube
- Power Frequency Withstand Voltage:
- 54 kV, 5 min, No Breakdown
- Partial Discharge Test:
- Partial Discharge Magnitude≤ 10 pC at 20 kV
- Impulse Voltage Test:
- 125 kV, 10 positive and 10 negative impulses, no breakdown
- Constant Voltage Load Cycling Test (in Air):
- 35 kV, conductor temperature 95–100 ℃, total 60 cycles, no breakdown, no flashover
- Thermal Stability Test (185 mm² Conductor):
- 23.4 kA, 2 s, twice, no visible damage
- Dynamic Stability Test:
- 82.6 kA, ≥ 10 ms, no visible damage
- Moisture Test (Indoor):
- 15 kV, 300 h, no breakdown, no flashover
- Salt Spray Test (Outdoor):
- 15 kV, 1000 h, no breakdown, no flashover
Medium Voltage Cable Insulation Solutions
Hangda Electric manufactures specialized Cold Shrink Cable Accessories designed for 12/20kV and 18/20kV medium voltage electrical networks. High-grade EPDM formulations deliver continuous radial pressure over cable joints, forming an airtight barrier against moisture ingress. Installing a pre-stretched cold shrink sleeve requires no open flame or special torches, eliminating thermal damage during field assembly.
Performance Specifications
Hangda Electric subjects every epdm cold shrink tube to rigorous testing procedures for electrical breakdown endurance.
| Parameter | Specification | Standard |
|---|---|---|
| Nominal Voltage Range | 12/20 kV - 18/20 kV | IEC 60502-4 |
| Dielectric Strength | ≥ 22 kV/mm | IEC 60243 |
| Tensile Strength | ≥ 10.5 MPa | ISO 37 |
| Operating Temperature | -40°C to +105°C | EN 50393 |
Installation Benefits and Selection Standards
Different power distribution layouts require precise cold shrink tubing sizes to ensure uniform mechanical retention. Proper sizing prevents localized electrical discharges along phase conductors.
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Pre-expanded inner core removes smoothly without leaving adhesive residue.
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Flame-free installation suits hazardous mining and industrial sites.
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Weatherproof memory elastic polymer adapts during heat-driven expansion and contraction cycles, outperforming traditional cold heat shrink methods.
Direct procurement options for power system infrastructure are available at Hangda Electric.
12/20, 18/20 kV Fully Cold Shrink Three-Core Terminal – Installation Outline Drawing
Electrical Performance Tests
| No. | Test Item | Standard Requirements |
| 1 | Power Frequency Withstand Voltage | 54 kV, 5 min, No Breakdown |
| 2 | Partial Discharge Test | Partial Discharge Magnitude≤ 10 pC at 20 kV |
| 3 | Impulse Voltage Test | 125 kV, 10 positive and 10 negative impulses, no breakdown |
| 4 | Constant Voltage Load Cycling Test (in Air) | 35 kV, conductor temperature 95–100 ℃, total 60 cycles, no breakdown, no flashover |
| 5 | Thermal Stability Test (185 mm² Conductor) | 23.4 kA, 2 s, twice, no visible damage |
| 6 | Dynamic Stability Test | 82.6 kA, ≥ 10 ms, no visible damage |
| 7 | Moisture Test (Indoor) | 15 kV, 300 h, no breakdown, no flashover |
| 8 | Salt Spray Test (Outdoor) | 15 kV, 1000 h, no breakdown, no flashover |
Product overview
◆The product is available in single-core, two-core, three-core, four-core, and five-core versions, and has been widely used for low-voltage cable terminations and intermediate connections.
◆Excellent surface hydrophobicity, ensuring the product maintains strong resistance to contamination.
◆Compact size, lightweight, and reliable performance.
◆Application Scope: The product demonstrates excellent cold and heat resistance, making it particularly suitable for high-altitude, cold, humid, salt-spray, and heavily polluted environments.
Installation requires no open flame, making it ideal for flammable and explosive areas such as petroleum, chemical, mining, and tunneling sites.
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| 12/20 kV Single-Core Cold Shrink Indoor Termination – Installation Drawing | 12/20 kV Three-Core Cold Shrink Outdoor Termination – Installation Drawing | 12/20 kV Three-Core Cold Shrink Outdoor Termination – Supporting Drawing | 12/20 kV Three-Core Cold Shrink Intermediate Connection – Supporting Drawing |
Technical Data - Model Selection
| Product Type | Model | Conductor Cross-section(mm²) |
| 12/20 kV Cold Shrink Indoor Termination | GHD-20HNLS-3(1)*35-500 | 35-500 |
| 12/20 kV Cold Shrink Outdoor Termination | GHD-20HWLS-3(1)*35-500 | 35-500 |
| 12/20 kV Cold Shrink Joint | GHD-20JTLS-3(1)*35-500 | 35-500 |
| 18/20 kV Cold Shrink Indoor Terminationl | GHD-24HNLS-3(1)*35-630 | 35-630 |
| 18/20 kV Cold Shrink Outdoor Termination | GHD-24HWLS-3(1)*35-630 | 35-630 |
| 18/20 kV Cold Shrink Joint | GHD-24JTLS-3(1)*35-630 | 35-630 |
