Silicone Rubber Heat And Cold Shrink Tubing Wrap Kits
- 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
Insulation Options for Medium-Voltage Systems
Cable termination integrity dictates electrical grid reliability during thermal cycling. While silicone rubber heat shrink tubing requires open flame or hot air guns during jointing, alternative cold-applied sleeves contract naturally around conductors through continuous elastic recovery.
Performance Under Mechanical Stress
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Active radial pressure ensures void-free interface sealing without thermal degradation.
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Flame-free operation removes hot-work permits inside confined utility chambers.
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Hydrophobic surface retention maintains tracking resistance across polluted substations.
Hangda Cold Shrink Solutions
For high-load distribution networks, deployed cold shrink kits eliminate human error linked with uneven torch heating. Hangda manufactures Cold Shrink Cable Accessories rated for 12/20kV to 18/20kV systems, utilizing high-grade liquid silicone elastomer that withstands intense electrical field stress.
Operational Advantages
Unlike conventional silicone shrink wrap varieties that loosen under severe temperature swings, Hangda terminations maintain constant interface grip. Factory pre-expansion ensures zero partial discharge during continuous operation.
| Parameter | Rated Value | Standard Reference |
|---|---|---|
| Voltage Rating | 12/20kV to 18/20kV | IEC 60502-4 |
| Dielectric Strength | ≥ 20 kV/mm | GB/T 12706.4 |
| Partial Discharge Level | ≤ 10 pC at 24 kV | IEEE 48 |
| Tensile Elongation | ≥ 650% | ASTM D412 |
Installation Sequence
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Strip outer semi-conductive layers to expose cable insulation.
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Slide the pre-assembled termination over the connector lug.
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Extract the inner plastic support core counterclockwise to secure radial contraction.
Select verified medium-voltage terminations directly at Hangda Cold Shrink Cable Accessories.
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 |
