Electrical Cold Shrink Cable Accessories EPDM Silicone Kits
Medium-voltage power distribution networks demand reliable insulation recovery at every splice and termination point. Selecting proper Cold Shrink Cable Accessories eliminates open-flame hazards inside confined switchgear cabinets and underground vaults. Pre-expanded elastomer sleeves contract tightly around cross-linked polyethylene (XLPE) cores upon core-ribbon removal, maintaining uniform radial pressure across thermal load cycles. Modern electrical cold shrink assemblies prevent moisture ingress and partial discharge across 10kV to 35kV plug-in connector interfaces.
Elastomer Material Selection and Field Performance
Material formulation dictates dielectric stability under harsh operating conditions. Moulded epdm cold shrink sleeves deliver superior mechanical puncture resistance and subterranean waterproofing for separable tee connectors. Conversely, traditional silicone rubber heat shrink tubing requires torches and uneven heating, creating thermal stress on cable jackets. Pre-stretched liquid silicone alternatives contract smoothly without heat sources, accommodating wide conductor cross-sections while maintaining hydrophobic surface properties and tracking resistance.
Core Insulation and Sealing Advantages
High-voltage termination longevity relies on active interfacial pressure and void-free assembly:
-
Continuous Radial Compression: Elastic memory compensates for XLPE thermal expansion and contraction, preventing interfacial air gaps.
-
Integrated Stress Control: Built-in high-permittivity geometric cones distribute electrical field gradients evenly at semi-conductive screen cuts.
-
Multi-Layer Moisture Barriers: Combining a primary silicone shrink wrap outer sleeve with mastic-lined cold shrink electrical tape seals copper grounding braids against subterranean water migration.
-
Rapid Flame-Free Assembly: Ribbon-pull installation eliminates hot-work permits inside petrochemical plants and wind turbine nacelles.
10-35kV Preparation Workflow and Technical Specifications
Standardized 10-35kV cold shrink kits streamline three-core to single-core breakout preparation for plug-in switchgear bushings:
-
Cable Stripping: Remove the outer sheath, armor, and semi-conductive layer according to connector cutoff dimensions.
-
Stress Cone Positioning: Align the pre-expanded breakout boot and insulation tubes over the prepared core phase.
-
Spiral Core Extraction: Pull the internal plastic support ribbon counterclockwise for instant, uniform elastomer contraction.
-
Screen Grounding: Secure tinned copper mesh tubes and constant-force springs over the earth connection before sealing.
10-35kV Cold Shrink Preparation Parameters
| Parameter | Specification Value | Test Standard |
|---|---|---|
| Rated System Voltage | 10kV – 35kV | IEC 60502-4 |
| Applicable Conductor Range | 25 mm² – 400 mm² | IEEE 404 |
| Dielectric Strength | Greater than 22 kV/mm | ASTM D149 |
| Partial Discharge Level | Less than 5 pC at 1.73 U0 | IEC 60270 |
| Continuous Operating Temperature | -50°C to +110°C | ISO 188 |
| Elongation at Break | Greater than 550% | ISO 37 |
Request a customized specification sheet or sample kit to match specific switchgear bushing profiles and conductor cross-sections.
 |
 |
| Cold Shrink Three-Core Sealing Assembly | Cold Shrink Single-Core Sealing Assembly |
Technical Data - Model Selection
| Product Type | Model | Conductor Cross-section(mm²) | Product Type | Model | Conductor Cross-section(mm²) |
| 8.7/15 kV Single-Core Cold Shrink Preparation Parts | GHD-15ZBLS-1*25-50 | 25-50 | 12/20 kV Sing-Core Cold Shrink Preparation Parts | GHD-20ZBLS-1*35-70 | 35-70 |
| GHD-15ZBLS-1*70-120 | 70-120 | GHD-20ZBLS-1*95-150 | 95-150 | ||
| GHD-15ZBLS-1*150-240 | 150-240 | GHD-20ZBLS-1*185-300 | 185-300 | ||
| GHD-15ZBLS-1*300-400 | 300-400 | GHD-20ZBLS-1*400-500 | 400-500 | ||
| 8.7/15 kV Three-Core Cold Shrink Preparation Parts | GHD-15ZBLS-3*10-16 | 25-50 | 12/20 kV Three-Core Cold Shrink Preparation Parts | GHD-20ZBLS-3*35-70 | 35-70 |
| GHD-15ZBLS-3*25-50 | 70-120 | GHD-20ZBLS-3*95-150 | 95-150 | ||
| GHD-15ZBLS-3*70-120 | 150-240 | GHD-20ZBLS-3*185-300 | 185-300 | ||
| GHD-15ZBLS-3*150-240 | 300-400 | GHD-20ZBLS-3*400-500 | 400-500 | ||
| 18/20 kV Single-Core Cold Shrink Preparation Parts | GHD-24ZBLS-1*35-95 | 35-95 | 26/35 kV Single-Core Cold Shrink Preparation Parts | GHD-35ZBLS-1*50-120 | 50-120 |
| GHD-24ZBLS-1*120-185 | 120-185 | GHD-35ZBLS-1*150-240 | 150-240 | ||
| GHD-24ZBLS-1*240-400 | 240-400 | GHD-35ZBLS-1*300-400 | 300-400 | ||
| GHD-24ZBLS-1*500-630 | 500-630 | GHD-35ZBLS-1*500-630 | 500-630 | ||
| 18/20 kV Three-Core Cold Shrink Preparation Parts | GHD-24ZBLS-3*35-95 | 35-95 | 26/35 kV Three -Core Cold Shrink Preparation Parts | GHD-35ZBLS-3*50-120 | 50-120 |
| GHD-24ZBLS-3*120-185 | 120-185 | GHD-35ZBLS-3*150-240 | 150-240 | ||
| GHD-24ZBLS-3*240-400 | 240-400 | GHD-35ZBLS-3*300-400 | 300-400 | ||
| GHD-24ZBLS-3*500-630 | 500-630 | GHD-35ZBLS-3*500-630 | 500-630 |
