EPDM Cold Shrink Sleeve Grip and Tubing Size Guide
- Reference standards:
- JB/T7829,JB/T 7830
- AC Withstand Voltage for 5 min:
- 8 kV,no breakdown
- Heating Cycles Test in Air:
- 4.5 kV, heating cycles at least 8 h, 95–100 ℃ for at least 2 h, natural cooling for at least 3 h, total 30 heating cycles
- Heating Cycles Test Under Water:
- 4.5 kV, heating cycles at least 8 h, 95–100 ℃ for at least 2 h, natural cooling for at least 3 h, total 30 heating cycles
- AC Withstand Voltage:
- 7.2 kV,4 h no breakdown
Reliable moisture seals and electrical insulation demand high mechanical retention across low-voltage power networks. As factory-expanded insulation units, Cold Shrink Cable Accessories deliver torch-free installation across 0.6/1kV distribution networks.
Core Mechanics of Elastomeric Sealing
EPDM rubber compounds exert active radial pressure over metallic connectors and cable jackets. Pulling the internal plastic spiral collapse cord activates the cold shrink sleeve, creating a tight interface that expands and contracts during thermal load cycles.
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Continuous Elastic Recovery: Vulcanized rubber contracts immediately upon core extraction.
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Environmental Barrier: IP68 submersion protection stops moisture ingress throughout harsh subterranean conduits.
Sizing and Selection Specifications
Proper dimensional matching prevents moisture migration or joint splitting. Selecting from standard cold shrink tubing sizes requires verifying minimum expanded diameter alongside maximum collapsed dimensions.
Hangda Dimension Reference Table
| Cable OD Range (mm) | Pre-Expanded ID (mm) | Recovered ID (mm) | Dielectric Strength (kV/mm) | Tensile Strength (MPa) |
|---|---|---|---|---|
| 10 – 18 | 28 | 8.5 | ≥ 20 | ≥ 10.5 |
| 17 – 32 | 45 | 14.0 | ≥ 20 | ≥ 11.0 |
| 28 – 54 | 70 | 23.5 | ≥ 20 | ≥ 11.2 |
| 45 – 80 | 105 | 38.0 | ≥ 20 | ≥ 11.5 |
Assembly Criteria and Radial Grip
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Diameter Validation: Ensure cable substrate outer diameter exceeds the fully recovered sleeve dimension with a 2mm safety margin.
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Proper Centering: Slide the epdm cold shrink tube over the connector before starting core unraveling.
Achieving a durable cold shrink grip depends on maintaining sufficient compression throughout service cycles. Hangda manufactures factory-tested 0.6/1kV Cold Shrink Cable Accessories fabricated from premium-grade synthetic elastomers, providing high tear resistance and permanent radial pressure.
0.6/1 kV Fully Cold Shrink Three-Core Terminal – Installation Outline Drawing
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| 0.6/1 kV Five-Core Cold Shrink Terminal – Supporting Drawing | 0.6/1 kV Five-Core Cold Shrink Joint – Supporting Drawing |
Electrical Performance Tests
| No. | Test Item | Standard Requirements |
| 1 | AC Withstand Voltage for 5 min | 8 kV,no breakdown |
| 2 | Heating Cycles Test in Air | 4.5 kV, heating cycles at least 8 h, 95–100 ℃ for at least 2 h, natural cooling for at least 3 h, total 30 heating cycles |
| 3 | Heating Cycles Test Under Water | 4.5 kV, heating cycles at least 8 h, 95–100 ℃ for at least 2 h, natural cooling for at least 3 h, total 30 heating cycles |
| 4 | AC Withstand Voltage | 7.2 kV,4 h no breakdown |
| 5 | Reference Standards | JB/T7829,JB/T 7830 |
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.
Technical Data - Model Selection
| Product Type | Model | Conductor Cross-section(mm²) | Product Type | Model | Conductor Cross-section(mm²) |
| 0.6/1 kV Single-Core Cold Shrink Termination | GHD-1LS-1*10-16 | 10-16 | 0.6/1 kV Single-Core Cold Shrink Joint | GHD-1JTLS-1*10-16 | 10-16 |
| GHD-1LS-1*25-50 | 25-50 | GHD-1JTLS-1*25-50 | 25-50 | ||
| GHD-1LS-1*70-120 | 70-120 | GHD-1JTLS-1*70-120 | 70-120 | ||
| GHD-1LS-1*150-240 | 150-240 | GHD-1JTLS-1*150-240 | 150-240 | ||
| GHD-1LS-1*300-400 | 300-400 | GHD-1JTLS-1*300-400 | 300-400 | ||
| 0.6/1 kV Two-Core Cold Shrink Termination | GHD-1LS-2*10-16 | 10-16 | 0.6/1 kV Two-Core Cold Shrink Joint | GHD-1JTLS-2*10-16 | 10-16 |
| GHD-1LS-2*25-50 | 25-50 | GHD-1JTLS-2*25-50 | 25-50 | ||
| GHD-1LS-2*70-120 | 70-120 | GHD-1JTLS-2*70-120 | 70-120 | ||
| GHD-1LS-2*150-240 | 150-240 | GHD-1JTLS-2*150-240 | 150-240 | ||
| GHD-1LS-2*300-400 | 300-400 | GHD-1JTLS-2*300-400 | 300-400 | ||
| 0.6/1 kV Three-Core Cold Shrink Termination | GHD-1LS-3*10-16 | 10-16 | 0.6/1 kV Three-Core Cold Shrink Joint | GHD-1JTLS-3*10-16 | 10-16 |
| GHD-1LS-3*25-50 | 25-50 | GHD-1JTLS-3*25-50 | 25-50 | ||
| GHD-1LS-3*70-120 | 70-120 | GHD-1JTLS-3*70-120 | 70-120 | ||
| GHD-1LS-3*150-240 | 150-240 | GHD-1JTLS-3*150-240 | 150-240 | ||
| GHD-1LS-3*300-400 | 300-400 | GHD-1JTLS-3*300-400 | 300-400 | ||
| 0.6/1 kV Four-Core Cold Shrink Termination | GHD-1LS-4*10-16 | 10-16 | 0.6/1 kV Four-Core Cold Shrink Joint | GHD-1JTLS-4*10-16 | 10-16 |
| GHD-1LS-4*25-50 | 25-50 | GHD-1JTLS-4*25-50 | 25-50 | ||
| GHD-1LS-4*70-120 | 70-120 | GHD-1JTLS-4*70-120 | 70-120 | ||
| GHD-1LS-4*150-240 | 150-240 | GHD-1JTLS-4*150-240 | 150-240 | ||
| GHD-1LS-4*300-400 | 300-400 | GHD-1JTLS-4*300-400 | 300-400 | ||
| 0.6/1 kV Five-Core Cold Shrink Termination | GHD-1LS-5*10-16 | 10-16 | 0.6/1 kV Five-Core Cold Shrink Joint | GHD-1JTLS-5*10-16 | 10-16 |
| GHD-1LS-5*25-50 | 25-50 | GHD-1JTLS-5*25-50 | 25-50 | ||
| GHD-1LS-5*70-120 | 70-120 | GHD-1JTLS-5*70-120 | 70-120 | ||
| GHD-1LS-5*300-400 | 150-240 | GHD-1JTLS-5*150-240 | 150-240 | ||
| GHD-1LS-5*300-400 | 300-400 | GHD-1JTLS-5*300-400 | 300-400 |
