1kV 10kV 35kV Heat Shrinkable Intermediate Joint
Wide Voltage Range: Reliable solutions for 1kV, 10kV, and 35kV power systems.
All-Weather Durability: Superior waterproofing, UV resistance, and corrosion protection for harsh environments.
Easy & Fast Installation: Lightweight design with clear instructions reduces labor time and costs.
Excellent Electrical Performance: High dielectric strength and stable electric field distribution ensure long-term reliability.
Global Compliance: Meets international standards for safety and performance.
- Product Introduction
Products Description
Our Electric's 1kV-35kV Heat Shrinkable Intermediate Joints provide a cost-effective and reliable solution for connecting medium-voltage power cables. Designed for cross-linked polyethylene (XLPE) and rubber-insulated cables, our kits ensure a secure, insulated, and waterproof connection that withstands the test of time.
Featuring advanced stress control and multi-layer protection, our joints eliminate weak points in your cable network. Whether for underground ducts, substations, or renewable energy projects, our heat shrink technology delivers superior dielectric strength and resistance to chemicals, moisture, and environmental stress.
Products Feature
Superior Sealing: Dual-wall construction with a hot-melt adhesive lining creates an IP68-rated waterproof seal, preventing moisture ingress and corrosion.
Robust Protection: The outer protective sheath provides excellent resistance to abrasion, chemicals, and UV radiation, making it ideal for direct burial or outdoor exposure.
Universal Compatibility: Suitable for a wide range of cable types (single-core to 5-core) and conductor sizes (10mm² to 500mm²).
Simplified Installation: The intuitive design and color-coded components allow for quick and error-free assembly, even in challenging field conditions.
Key Components & Functions
- Stress Control Element: Effectively reduces electrical stress at the joint, ensuring stable electric field distribution and preventing breakdowns.
- Dual-Wall Sealing Adhesive: Melts upon heating to create a watertight, corrosion-resistant seal that blocks moisture ingress.
- Outer Protective Sheath: Delivers superior mechanical protection, shielding the joint from abrasion, chemicals, and harsh weather.
- High-Performance Insulation Layer: Provides reliable dielectric strength and electrical isolation between conductors.
- Heat-Shrinkable Tubing: Manufactured from premium polyolefin, shrinking tightly upon heating for a secure, custom fit.
- Robust Conductor Connectors: Available in crimp or mechanical designs to guarantee a secure and low-resistance cable joint.
Products Parameter
Rated voltage: 1kV, 10kV, 35kV Applicable to single-core, two-core, three-core, four-core and five-core cables:
Step-by-Step Installation Guide
1. Cable Preparation
Carefully strip the outer sheath, metallic shielding, and insulation layers to expose the conductor. Use professional tools to ensure all cuts are clean, smooth, and completely free of burrs.2. Conductor Connection
Crimp the copper or aluminum connectors using a hydraulic crimping tool to ensure low contact resistance. Pro Tip: Use a torque wrench to verify the tightness.3. Semiconductive Layer Restoration
Slide the inner semiconductive heat-shrink tube over the joint and apply heat until it is fully shrunk and tightly fitted.4. Main Insulation Restoration
Position the main insulating heat-shrink tube over the joint. Heat it evenly using a propane torch or hot air gun to prevent trapped air bubbles.5. Stress Control Treatment
Apply stress control tape or install a pre-molded stress cone to ensure a smooth and safe electric field distribution.6. Outer Shielding Restoration
Slide the outer semiconductive heat-shrink tube over the joint and heat it to form a secure, tight fit.7. Sealing and Protection
Shrink the outer protective sheath. Crucial Check: Ensure a sufficient overflow of the sealing adhesive at both ends, which indicates a reliable, waterproof seal.
⚠️ Critical Installation Notes
- Environmental Limits: Install only when the ambient temperature is above 0°C and relative humidity is below 70%.
- Temperature Control: The ideal heating temperature for components is 120°C–140°C.
- Heating Technique: Always move the heat source continuously. Avoid prolonged, concentrated heating on a single area to prevent material degradation.
FAQ
Q: Heat Shrink vs. Cold Shrink: Which is better for my project?
A: Heat shrink joints offer the best value for money and are ideal for most MV applications. They require a heat source (torch/hot air) for installation. Cold shrink joints are faster to install (no heat needed) but are generally more expensive. For underwater or extreme environments, we recommend cold shrink or pre-molded solutions.
Q: Can these joints be used for underground or underwater cables?
A: Yes. Our standard kits are suitable for direct burial in cable trenches. For submerged applications, we recommend using our dual-wall heat shrink tubing with an integrated sealing adhesive layer to achieve IP68 waterproofing.
Q: What is the operating temperature range?
A: The recommended installation temperature is above 0°C. Once installed, the joint can operate stably in temperatures ranging from -40°C to +90°C, depending on the specific cable and environmental conditions.
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