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1kV Cold Shrinkable Cable Accessories for Indoor And Outdoor Use

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1kV Cold Shrinkable Cable Accessories are designed for indoor and outdoor 0.6/1kV power distribution systems, suitable for single-core to five-core cables with cross-sectional areas ranging from 4mm² to 400mm². Made from high-elasticity liquid silicone rubber, these accessories offer excellent insulation, moisture resistance, UV resistance, ozone resistance, and corrosion resistance. With cold shrink technology, installation requires no flame or heating tools—simply remove the internal support core and the accessory shrinks securely into place. The constant radial pressure ensures long-term sealing and reliable electrical performance, making it ideal for underground cable trenches, overhead lines, distribution cabinets, industrial facilities, and demanding outdoor environments.

Safe and Efficient Cold Shrink Installation

No torch, hot air gun, or open flame is required, making installation faster, safer, and more convenient for field operations.

High-Elastic Silicone Rubber for Reliable Sealing
The liquid silicone rubber material provides excellent elasticity and maintains continuous radial pressure, creating a tight seal against moisture, dust, and contaminants.

Built for Indoor and Outdoor Environments
With strong resistance to UV, ozone, acid and alkali corrosion, and electrical tracking, the product performs reliably in temperatures from -40°C to +45°C.

Wide Compatibility for Flexible Applications
Compatible with single-core, two-core, three-core, four-core, and five-core cables, covering 4mm² to 400mm², helping simplify procurement and inventory management.

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Quantity:
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Low Voltage Cable Accessories:

1kV Heat Shrinkable Cable Accessories:

1kV heat shrinkable cable accessories are widely used in 1kV cable termination processing and middle connection, products are divided into two core, three core, four core and five core.

Technical Specification

Item

Requirements

Test Content

Result

1min Power Frequency Withstand Voltage Test

4kV No flashover, no breakdown

4kV 1min No flashover, no breakdown

Pass

Load cycle test (3 cycles)

5h Heating, 3h cooling, conductor temperature is 75℃ when heating.

5h Heating, 3h cooling, conductor temperature is 75℃ when heating.

As same as following test result

4h Power Frequency Withstand Voltage Test

2.4kV No flashover, no breakdown

2.4kV 4h No flashover, no breakdown

Pass


Product specifications


Product Name

Model

Cross Section Area

1kV single core cable heat shrinkable termination

STY-1/1×-0

4-6

STY-1/1×0

10-16

STY-1/1×1

25-50

STY-1/1×2

70-120

STY-1/1×3

150-240

STY-1/1×4

300-400

1kV two core cable heat shrinkable termination

STY-1/2×-0

4-6

STY-1/2×0

10-16

STY-1/2×1

25-50

STY-1/2×2

70-120

STY-1/2×3

150-240

STY-1/2×4

300-400

1kV three core cable heat shrinkable termination

STY-1/3×-0

4-6

STY-1/3×0

10-16

STY-1/3×1

25-50

STY-1/3×2

70-120

STY-1/3×3

150-240

STY-1/3×4

300-400

1kV four core cable heat shrinkable termination

STY-1/4×-0

4-6

STY-1/4×0

10-16

STY-1/4×1

25-50

STY-1/4×2

70-120

STY-1/4×3

150-240

STY-1/4×4

300-400

1kV five core cable heat shrinkable termination

STY-1/5×-0

4-6

STY-1/5×0

10-16

STY-1/5×1

25-50

STY-1/5×2

70-120

STY-1/5×3

150-240

STY-1/5×4

300-400

1kV single core cable heat shrinkable middle joint

SJY-1/1×-0

4-6

SJY-1/1×0

10-16

SJY-1/1×1

25-50

SJY-1/1×2

70-120

SJY-1/1×3

150-240

SJY-1/1×4

300-400

1kV two core cable heat shrinkable middle joint

SJY-1/2×-0

4-6

SJY-1/2×0

10-16

SJY-1/2×1

25-50

SJY-1/2×2

70-120

SJY-1/2×3

150-240

SJY-1/2×4

300-400

1kV three core cable heat shrinkable middle joint

SJY-1/3×-0

4-6

SJY-1/3×0

10-16

SJY-1/3×1

25-50

SJY-1/3×2

70-120

SJY-1/3×3

150-240

SJY-1/3×4

300-400

1kV four core cable heat shrinkable middle joint
(3+1 core)

SJY-1/4×-0

4-6

SJY-1/4×0

10-16

SJY-1/4×1

25-50

SJY-1/4×2

70-120

SJY-1/4×3

150-240

SJY-1/4×4

300-400

1kV five core cable heat shrinkable middle joint

SJY-1/5×-0

4-6

SJY-1/5×0

10-16

SJY-1/5×1

25-50

SJY-1/5×2

70-120

SJY-1/5×3

150-240

SJY-1/5×4

300-400


1kV Cold Shrinkable Cable Accessories:

1、Raw material technical data sheets

No.

Item

Unit

Index

Testing Method

1

Tensile Srength

MPa

≥5.5

GB/T 528-2009

2

Elongation at break

%

≥480

GB/T 528-2009

3

Hardness (Shore A)


40±2

GB/T 531.1-2009

4

Tearing Strength

N/mm

≥35

GB/T 529-2008

5

Withstand Voltage Strength

KV/mm

≥20

GB/T 1695-2005

6

Volume Electrical Resistivity

Ω•cm

≥1015

GB/T 1692-2008

7

Dielectric Coefficient


2.8~3.5

GB/T 1693-2007

8

Dielectric Loss Tangent


≤0.01

GB/T 1693-2007

9

Resistance to Tracking


≥1A3.5

GB/T 6533-2003


2、Manufacturing Standards: IEC 60502( equivalent to GB/T 12706).
1kV Cold Shrinkable Cable Accessories Main Technical Data

No.

Item

Standard
Requirements

Technical Requirements

1

Power Frequency
Voltage Test

8kV,5min

8kV/5min

2

Power Frequency
Voltage Test

7.2kV,4h

7.2kV,4h

3、 Environment Condition
3.1 Installation place: indoor or outdoor.
3.2  Altitude Height: ≤1000m
3.3 Pollution Level: IV
3.4 Max. ice cover: 10mm
3.5  Environment Temperature: -40℃~+45℃
3.6 Max. wind speed: no more than 35m/s ( equal to wind pressure: 700Pa)
3.7 Earthquake level: 7

4、Main Technical Data
4.1Rated Voltage: 0.6/1kV
4.2Conductor running temperature:
meet the same temperature requirements as cables that fitting the accessories.
4.3 Cable accessories insulating level should be no less than that of the fitting cables.
4.4 The cable accessories should include all the relevant fittings and consuming materials that needed during installation.
4.5 All the cold shrinkable accessories should pass the factory tests and inspections before it is delivered. The surface of the products should be smooth, no visible blackspots, pits or cracks because of bad material or wrong manufacturing technology. The construction dimension should meet the requirements of drawing.
5、 Fittings
5.1  breakout
5.2Insulating tubes ( original length: 450mm)
5.3  PVC tapes
5.4 Filling adhesive
5.5 Cable lugs (according to customer specific order requirements)

Product Overview

  • Engineered for highly reliable 0.6/1kV power distribution networks

  • Accommodates versatile configurations from single to five-core cables

  • Manufactured from premium, high-elasticity liquid silicone rubber

  • Tool-free, rapid cold shrink installation for maximized operational efficiency

  • Supplied directly by a premier manufacturer to streamline global procurement

Product Description

Upgrading your electrical grid infrastructure requires components that eliminate points of failure, and our 1kV cold shrinkable cable accessories deliver precisely that reliability. Crafted from premium-grade liquid silicone rubber, these terminations and joints feel incredibly robust yet possess the high-stretch elasticity required to form an impenetrable, permanent seal around your cables. The tactile smoothness of the rubber exterior signifies a flawless manufacturing process, free from microscopic pits, black spots, or structural weaknesses that could compromise insulation in the field.

By utilizing advanced cold shrink technology, your installation teams can bypass the hazards and logistical headaches of open-flame torches or cumbersome heating tools. As the inner spiral core is smoothly extracted, the silicone sleeve snaps into place with an audible, reassuring tightness, exerting a constant, unyielding radial pressure. This active grip ensures that even under severe thermal cycling, heavy industrial vibrations, or shifting winds, the seal remains completely watertight and electrically secure.

1kV Cold Shrinkable Cable Accessories manufactured from high-elastic liquid silicone rubber for secure power connections

Investing in these advanced accessories translates directly to minimized downtime, radically reduced labor costs during deployment, and a maintenance-free lifespan that elevates the overall integrity of your power distribution networks. Whether deployed in damp underground trenches or exposed to the blistering sun on overhead lines, the material's inherent resistance to ozone, UV rays, and moisture guarantees uninterrupted power transmission for your most critical assets.

Product Specifications

Parameter / Item

Technical Specification

Product Name

1kV Cold Shrinkable Cable Accessories (Indoor & Outdoor)

Rated Voltage

0.6/1kV

Applicable Cores

Single core, Two core, Three core, Four core, Five core

Applicable Cross Section Area

4-6 mm² to 300-400 mm²

Manufacturing Standards

IEC 60502 (equivalent to GB/T 12706)

Main Material

High-elastic liquid silicone rubber

Tensile Strength

≥5.5 MPa

Elongation at Break

≥480%

Hardness (Shore A)

40±2

Tearing Strength

≥35 N/mm

Withstand Voltage Strength

≥20 KV/mm

Volume Electrical Resistivity

≥10¹⁵ Ω•cm

Dielectric Coefficient

2.8~3.5

Dielectric Loss Tangent

≤0.01

Resistance to Tracking

≥1A3.5

Power Frequency Voltage Test

8kV/5min, 7.2kV/4h

Environment Temperature

-40℃ ∼ +45℃

Altitude Height

≤1000m

Pollution Level

IV

Max. Ice Cover

10mm

Max. Wind Speed

≤35m/s (equal to wind pressure: 700Pa)

Earthquake Level

7

Standard Fittings Included

Breakout, Insulating tubes (original length: 450mm), PVC tapes, Filling adhesive, Cable lugs (according to specific order requirements)

Key Features & Highlights

Deploying reliable power connections in demanding environments requires engineering that goes beyond basic compliance. Our cold shrinkable solutions are meticulously designed to optimize operational efficiency while safeguarding your critical power assets against premature wear and catastrophic electrical faults.

  • Active Moisture Barrier: The inherent memory of the silicone elastomer maintains a continuous compressive force, creating a dynamic seal that actively repels moisture, dust, and corrosive industrial gases long after the initial installation.

  • Zero-Flame Deployment: Completely eliminates the need for hot work permits, blowtorches, and heavy gas cylinders, drastically accelerating project timelines and improving job site safety protocols in restricted or volatile areas.

  • Optimized Electrical Stress Control: Engineered to naturally smooth out concentrated electrical fields at the cable screen cut-off, preventing localized discharges and extending the operational life of the entire circuit.

  • Compact Footprint: The sleek, low-profile finished joint seamlessly integrates into tight enclosures, compact switchgears, and densely packed cable trays without adding unnecessary bulk or mechanical strain.

  • Universal Compatibility: Designed to seamlessly interface with standard polymeric cables, ensuring your procurement teams can standardize inventory across diverse infrastructure projects, reducing overhead and storage complexity.

Advanced Engineering & Application Dimensions

To meet the rigorous demands of modern power distribution, every aspect of our cold shrinkable accessories has been refined. From the molecular structure of the insulation to the final field application, these components represent the pinnacle of electrical connection technology.

  • Core Material & Physical Performance: Manufactured from premium, high-tear-resistant liquid silicone rubber. This material delivers a constant radial pressure, ensuring a relentless, tight fit against the cable jacket. It completely eradicates the risk of layer separation caused by mechanical bending, heavy winds, or persistent structural vibrations.

  • Installation Convenience & Labor Efficiency: The intuitive cold shrink delivery system requires absolutely no specialized tools or heat sources. Installers simply unwind the internal spiral plastic support, allowing the elastomer to instantly contract and lock into place. This drastically lowers the technical barrier for installation, accelerates project completion, and simplifies future grid inspections.

  • Extreme Environmental Adaptability: Engineered to conquer the harshest climates, these accessories boast exceptional weatherproofing. They are highly resistant to UV radiation, ozone degradation, fungal growth, and acid/alkali corrosion. They perform flawlessly across extreme temperature fluctuations (-40℃ to +45℃), high altitudes up to 1000m, and heavily polluted (Level IV) coastal or industrial zones.

  • Superior Electrical Insulation: Featuring an extraordinary dielectric strength (≥20 KV/mm) and massive volume resistivity (≥10¹⁵ Ω•cm). The exceptionally low dielectric loss and high tracking resistance effectively dissipate electrical stress, mitigating the risks of partial discharge and grid breakdown to guarantee absolute transmission safety.

  • Comprehensive Specification Range: Covering the entire spectrum of 0.6/1kV low-voltage networks, these kits accommodate single to five-core cables with cross-sectional areas ranging from 4mm² up to 400mm². This broad adaptability allows project managers to consolidate their supply chains and reduce warehousing complexities for both indoor cabinets and outdoor overhead lines.

  • Strict Quality Control & Global Compliance: Manufactured in strict adherence to IEC 60502 and GB/T 12706 standards. Every single batch undergoes rigorous factory testing, including 100% power frequency withstand voltage tests. The result is a visually flawless, smooth surface ensuring zero-defect delivery for massive infrastructure projects.

Why Choose Us

Securing a reliable supply chain for critical electrical components is paramount for the success of large-scale infrastructure developments. As a dedicated manufacturer and global supplier, we provide more than just exceptional hardware; we deliver strategic procurement advantages tailored for high-volume demands.

  • Direct Manufacturer Economics: By sourcing directly from our advanced production facilities, you eliminate intermediary markups, securing highly competitive pricing for large-scale project rollouts without compromising on material integrity.

  • Uncompromising Quality Assurance: Our state-of-the-art testing laboratories subject every product to punishing electrical and mechanical stress tests. We guarantee that what arrives at your facility performs exactly as specified, every single time.

  • Scalable Production Capacity: Whether you require a rapid deployment for an emergency grid repair or sustained, high-volume deliveries for a multi-year municipal development, our agile manufacturing lines scale to meet your exact timeline.

  • Customized Engineering Support: We understand that complex installations occasionally require tailored solutions. Our technical team is readily available to customize cable lugs and accessory configurations to perfectly match your specific project blueprints.

FAQ

Q: How does the constant radial pressure of cold shrink technology benefit long-term installations?

A: Unlike heat shrink alternatives that can become rigid over time, our cold shrink silicone rubber maintains a permanent, active inward force. This "living seal" breathes with the thermal expansion and contraction of the cable, ensuring moisture and contaminants are permanently locked out over decades of service.

Q: Are these accessories suitable for heavily polluted industrial environments?

A: Absolutely. Formulated with advanced anti-tracking compounds and boasting a Level IV pollution resistance rating, the silicone exterior sheds water and resists the accumulation of conductive industrial dust, preventing surface arcing in severe environments.

Q: What is the shelf life of the cold shrink accessories before installation?

A: When stored in a cool, dry environment away from direct sunlight, the internal spiral core maintains the expanded state of the rubber reliably. However, for optimal contraction speed and elasticity, we recommend utilizing the components within industry-standard storage timeframes, typically 12 to 18 months from manufacturing.

Q: Can these kits accommodate cables with varying cross-sectional areas?

A: Yes, the high-stretch nature of our liquid silicone rubber allows a single accessory model to cover a wide range of cable diameters. Our kits seamlessly adapt to cross-sections from 4mm² up to 400mm², significantly simplifying your inventory management and reducing the number of SKUs you need to stock.

Q: Do the kits include all necessary components for a complete termination or joint?

A: Every kit is comprehensively packaged for immediate deployment. Standard inclusions feature the cold shrink breakout, 450mm insulating tubes, premium PVC tapes, specialized filling adhesive, and optional customized cable lugs based on your specific order requirements, ensuring your field teams have everything they need in one box.

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