What is a cold shrink cable termination?

A cold shrink cable termination is a pre-expanded silicone insulation assembly that contracts onto the cable after the support core is removed. It forms insulation and environmental sealing without flame or heating tools.

What is the difference between cold shrink and heat shrink termination?

Cold shrink relies on elastic recovery and does not require a heat source; heat shrink requires controlled heating to recover. Cold shrink is often selected for stable field installation consistency and reduced hot-work risk.

How long does cold shrink cable accessory service life usually last?

Service life depends on material quality, installation quality, load profile, and operating environment. Properly selected and installed cold shrink accessories are designed for long-term medium-voltage service.

Is cold shrink waterproof and suitable for outdoor use?

Cold shrink outdoor termination systems are commonly used in exposed environments. Waterproof performance depends on correct model selection, cable preparation, and installation quality.

Can cold shrink accessories be used for underground cable systems?

Yes. Cold shrink joint systems are widely used in underground distribution cable routes, subject to correct voltage class, cable structure matching, and sealing system requirements.

What are the main types of cold shrink cable accessories?

Main families include cold shrink indoor terminations, outdoor terminations, and straight-through joints. Selection is usually based on voltage class, cable core structure, and conductor cross-section range.

Can heat shrink be installed with a hair dryer?

Engineering installations generally require professional controlled-heating tools for heat shrink systems. Household hair dryers usually cannot provide reliable and uniform process control for power cable accessories.

What information should be provided for accurate cold shrink model selection?

Provide voltage class, application type (indoor/outdoor/joint), cable core type (single-core/3-core), conductor cross-section range, and quantity. These are the key inputs for accurate model mapping.

Cable Accessories Series

Cold Shrink Cable Accessories for Medium Voltage Cable Systems

Q: What tools are needed for cold shrink installation?

Standard cable preparation tools are required, such as stripping and cleaning tools. For the shrink body itself, no torch or heat gun is needed because the removable core drives recovery.

Q: What are common cable termination types in medium-voltage projects?

Common medium-voltage options include cold shrink terminations, heat shrink terminations, pre-molded separable interfaces, and resin-based systems. Final choice depends on standards, environment, and maintenance strategy.

Complete cold shrink solutions for indoor and outdoor terminations and straight-through joints, supporting 10kV and 35kV class distribution cable projects with stable insulation performance and fast field installation.

OEM/ODM Support • Fast Technical Response • Export Documentation

Request Quote View Specifications

Voltage Class 8.7/15kV & 26/35kV

Product Scope Termination & Joint Kits

Application MV Distribution Cable Networks

Product Definition

What Are Cold Shrink Cable Accessories?

Cold shrink cable accessories are pre-expanded silicone insulation components used for medium-voltage cable terminations and joints. A typical cold shrink cable termination or cold shrink cable joint is installed by removing the support core, allowing the body to shrink and seal tightly on the cable surface without external heating. This makes medium voltage cold shrink accessories highly practical for utility, industrial, and maintenance projects requiring stable insulation and efficient on-site installation.

1
No Heat Source Needed — installation is completed without flame or torch, improving site safety and consistency.
2
Stable Insulation Interface — pre-expanded silicone structure helps maintain reliable electrical stress control.
3
Project-Ready Product Scope — supports indoor/outdoor terminations and straight-through joints for 10kV and 35kV class systems.

ZeeyiElec provides cold shrink solutions for MV cable systems, with model mapping support based on voltage class, cable structure, and conductor range.

Field Installation Cable Preparation

Core Step Position Pre-Expanded Component

This Technology Remove Core, Auto-Shrink & Seal

Final Function Insulation, Stress Control & Sealing

Product Families

Cold Shrink Cable Accessories for 10kV and 35kV Systems

Structured around outdoor terminations, indoor terminations, and straight-through joints. These product families support medium-voltage cable projects with clear model mapping and engineering-ready kit configuration.

10kV

10kV 3-Core Outdoor Termination

Family: Outdoor Termination Kit

For medium-voltage 3-core cable termination points.
Designed for outdoor installation environments.
Cold shrink installation without heat source.

Reference: WLS series (8.7/15kV class).

10kV

10kV 3-Core Indoor Termination

Family: Indoor Termination Kit

For switchroom and indoor cable end treatment.
Compact structure for controlled indoor spaces.
Stable insulation interface with pre-expanded design.

Reference: NLS series (8.7/15kV class).

10kV

10kV 3-Core Straight Through Joint

Family: Intermediate Joint Kit

For cable extension and route continuity.
Cross-section architecture supports layered insulation recovery.
Suitable for MV distribution project maintenance and retrofit.

Reference: JLS series (8.7/15kV class).

35kV

35kV 3-Core Outdoor Termination

Family: Outdoor Termination Kit

For higher-voltage outdoor cable terminations.
Dimensioned engineering drawing for installation planning.
Built for distribution and utility connection points.

Reference: WLS series (26/35kV class).

35kV

35kV 3-Core Indoor Termination

Family: Indoor Termination Kit

Configured for indoor MV/HV transition sections.
Drawing-based dimensional control for panel/substation use.
Consistent kit layout supports installation repeatability.

Reference: NLS series (26/35kV class).

35kV

35kV 3-Core Straight Through Joint

Family: Intermediate Joint Kit

For high-reliability cable joining in 35kV networks.
Cross-section design highlights stress control and shielding continuity.
Supports project-level replacement and extension works.

Reference: JLS series (26/35kV class).

Need full model mapping by conductor size and cable structure? Jump to SEC4 Specifications for OCR-converted HTML tables.

Engineering Data

Cold Shrink Cable Accessories Specifications & Model Tables

OCR-converted model and technical data for better indexing and easier RFQ matching. If your project requires a specific cable structure or conductor range, share your cable details for exact model confirmation.

10kV Model Selection Table 8.7/15kV Class

Product family mapping by installation type and core configuration.

Product Family	Core Type	Model Codes
Cold Shrink Outdoor Termination Kit	Single-core	WLS-8.7/15-1.1, WLS-8.7/15-1.2, WLS-8.7/15-1.3, WLS-8.7/15-1.4, WLS-8.7/15-1.5
Cold Shrink Indoor Termination Kit	Single-core	NLS-8.7/15-1.1, NLS-8.7/15-1.2, NLS-8.7/15-1.3, NLS-8.7/15-1.4, NLS-8.7/15-1.5
Cold Shrink Straight Through Joint	Single-core	JLS-8.7/15-1.1, JLS-8.7/15-1.2, JLS-8.7/15-1.3, JLS-8.7/15-1.4, JLS-8.7/15-1.5
Cold Shrink Outdoor Termination Kit	3-core	WLS-8.7/15-3.1, WLS-8.7/15-3.2, WLS-8.7/15-3.3, WLS-8.7/15-3.4, WLS-8.7/15-3.5
Cold Shrink Indoor Termination Kit	3-core	NLS-8.7/15-3.1, NLS-8.7/15-3.2, NLS-8.7/15-3.3, NLS-8.7/15-3.4, NLS-8.7/15-3.5
Cold Shrink Straight Through Joint	3-core	JLS-8.7/15-3.1, JLS-8.7/15-3.2, JLS-8.7/15-3.3, JLS-8.7/15-3.4, JLS-8.7/15-3.5

Note: Final model selection should be validated against cable structure, conductor size, and project installation conditions.

35kV Model Naming Rule & Series Pattern 26/35kV Class

Code logic to identify termination/joint type and cable core configuration.

Code Segment	Meaning
W	Outdoor Termination
N	Indoor Termination
J	Straight Through Joint
26/35	Voltage Class (kV)
3	3-core Cable
X	Conductor Cross-section Index

Product Family	Core Type	Series Pattern
Cold Shrink Outdoor Termination	3-core	WLS-26/35-3.X
Cold Shrink Indoor Termination	3-core	NLS-26/35-3.X
Cold Shrink Straight Through Joint	3-core	JLS-26/35-3.X

Note: “X” indicates conductor range segment. Use project cable data to confirm exact variant code.

35kV Main Technical Parameters Type Test / Performance

Typical performance requirements for 26/35kV cold shrink cable accessories.

Item	Value / Requirement
Rated Voltage / Frequency	26/35 kV, 50 Hz
AC Withstand Test (Dry)	117 kV, 5 min, no breakdown or flashover
AC Withstand Test (Wet)	104 kV, 6 min, no breakdown or flashover
Impulse Voltage Test	±200 kV, 10 times, no breakdown or flashover
Heating Cycle Voltage Test in Air	95–100°C, 65 kV, 60 cycles, no breakdown or flashover
Constant Pressure Load Cycling Test in Water	95–100°C, 65 kV, 30 cycles, no breakdown or flashover
Partial Discharge	< 10 pC
High Temperature Electrical Test	95–100°C, 45 kV, < 10 pC
Power Frequency Voltage Test	22 kV, 15 min, no breakdown or flashover
Short-circuit Thermal Stability	No damage
Salt Spray Test	Spray rate (0.4±0.1) L/(h·m²), fog conductivity (1600±200) mS/m, 32.5 kV, 1000 h, no breakdown or flashover
Humidity Test	Spray rate (0.4±0.1) L/(h·m²), fog conductivity (70±10) mS/m, 32.5 kV, 300 h, no breakdown or flashover

Compliance reminder: values should be finalized according to your approved factory datasheet and customer technical specification.

Engineering & Supply Support

From Model Selection to Export Delivery, Built for B2B Cable Projects

Beyond cold shrink cable accessory manufacturing, ZeeyiElec supports project-side selection logic, technical confirmation, and shipment documentation to reduce communication cycles and improve RFQ accuracy.

Model Matching Support

Assist with termination and joint model selection based on voltage class, cable core type, and conductor range.

Technical Data Alignment

Provide structured datasheet confirmation to align your project requirements with available cold shrink series.

OEM/ODM Collaboration

Support private labeling and specification-based supply workflows for utility contractors and industrial buyers.

Export Documentation

Commercial invoice, packing list, and shipment documents prepared for international procurement and customs clearance.

Application Scenarios

Where Cold Shrink Terminations and Joints Are Commonly Applied

Cold shrink cable accessories are widely used in medium-voltage distribution projects where installation consistency, insulation reliability, and maintenance accessibility are critical.

Utility Distribution Networks

10kV / 35kV

Used in power distribution feeder sections and branch connections for indoor/outdoor cable terminations and route continuity joints.

Substation outgoing cable interfaces
Feeder section extension and reconnection
Retrofit replacement in aged distribution lines

Typical products: outdoor termination kits, straight-through joint kits.

Industrial Power Systems

Indoor Priority

Suitable for factory substations and process plants that require stable medium-voltage cable insulation performance and organized maintenance workflow.

Motor control and distribution room cable ends
Production line expansion projects
Shutdown-window cable joint replacement

Typical products: indoor terminations + matched straight-through joints.

Commercial & Infrastructure Projects

Project Supply

Applied in integrated cable systems for buildings, transport support facilities, and public infrastructure requiring long service reliability.

Campus and complex MV distribution rooms
Tunnel/transport auxiliary power segments
Municipal upgrade and phased capacity expansion

Typical products: full-kit combinations by voltage class and core type.

Renewable Energy Collection Circuits

MV Collection

Used in medium-voltage collection lines and transition sections where project teams need repeatable installation and clear model control.

Cable transitions between equipment zones
Jointing segments during staged commissioning
Operation-period maintenance replacement

Typical products: outdoor/indoor terminations with compatible joint kits.

Contractor Maintenance Projects

Fast Turnaround

Preferred in service scenarios where teams need consistent field operations and reduced dependency on heat-based installation methods.

Emergency repair for damaged cable sections
Scheduled overhaul and cable rerouting work
Inventory-standardized maintenance packages

Typical products: standardized kits for common conductor ranges.

Export-Oriented EPC Procurement

Documentation-Ready

Fits EPC and international sourcing workflows that require structured model coding, clear technical confirmation, and shipment documentation support.

RFQ by voltage class + core type + quantity
Batch planning by indoor/outdoor/joint application
Commercial and logistics document alignment

Typical products: project bundles combining termination and joint families.

Selection reminder: For accurate cold shrink model confirmation, provide voltage class, cable core type, conductor cross-section, installation environment (indoor/outdoor), and required quantity. This information directly maps to the SEC4 model tables.

Cold Shrink Selection Guide | ZeeyiElec

Project Planning

Selection Guide for Cold Shrink Systems

Precise engineering selection reduces installation failure and extends service life. Use our logic flow to find your ideal termination or joint solution.

Voltage Check

Verify system rated voltage. Typical applications include 10kV (8.7/15kV) or 35kV (26/35kV) distribution networks.

Site Condition

Determine the environment: Indoor (compact switchgear) vs Outdoor (UV, humidity, and pollution protection).

Core Topology

Match the cable structure. Select Single-core (1C) for transmission or Three-core (3C) with breakout boots.

Sectional Area

Identify conductor mm². Our active-pressure technology covers wide ranges (e.g., 25-50mm² up to 400-500mm²).

Selection Matrix

Operational Context	Product Family	Pattern Logic	Class
Outdoor Overhead/Substation	Outdoor Termination	WLS-XX/XX.X	10kV – 35kV
Switchgear / GIS Cabinet	Indoor Termination	NLS-XX/XX.X	10kV – 35kV
Cable Extension / Repair	Straight Joint	JLS-XX/XX.X	10kV – 35kV
1-Core Distribution	Single-Core Kit	…-1.X	Component
3-Core Distribution	Three-Core Kit	…-3.X	Full Package

Quality & Documentation

Quality Control and Export Documentation for Cold Shrink Cable Accessories

ZeeyiElec supports project-side verification with structured quality checks and practical documentation workflows for medium-voltage cold shrink cable termination and joint supply.

Production & Quality Control Focus

Typical control points used to improve consistency for cold shrink cable accessory supply.

Material Consistency

Silicone insulation body stability and appearance consistency verification across batch production.

Dimensional Check

Key size checkpoints aligned with model range and cable application mapping requirements.

Model Code Verification

Inner/outer label and carton marking consistency check against confirmed order model list.

Packing Integrity

Export packing confirmation for quantity, accessory completeness, and transport-readiness.

Step 1

Technical requirement review (voltage class / application / cable structure).

Step 2

Model mapping confirmation based on SEC4 table logic and project input.

Step 3

Production + quality checkpoint execution with delivery schedule coordination.

Step 4

Commercial and shipment document preparation for export dispatch.

FAQ & Resources

Cold Shrink Cable Termination FAQ & Technical References

Answers to common questions about cold shrink cable accessories, including installation method, service life, heat-shrink comparison, waterproof suitability, and cable termination type selection.

Related Resources

Internal Category: Explore Cable Accessories
External Standard: IEC 60502-4 (Power Cable Accessories Test Requirements) ↗

A cold shrink cable termination is a pre-expanded silicone insulation assembly that contracts onto the cable after removing the support core. It forms insulation and environmental sealing without flame or heating tools.

Cold shrink relies on elastic recovery and does not require a heat source; heat shrink needs controlled heating to recover. Cold shrink is often preferred where consistent field installation and reduced fire-risk operation are required.

Basic cable preparation tools are typically required, such as stripping and cleaning tools. For the shrink body itself, no torch or heat gun is needed; installers pull the removable core to complete recovery.

Service life depends on product quality, installation quality, load profile, and environment. In properly selected and installed MV systems, cold shrink accessories are designed for long-term operation comparable to project design expectations.

Cold shrink outdoor termination designs are commonly used in exposed environments. Final waterproof performance depends on correct model selection, cable preparation, and installation procedure compliance.

Yes, cold shrink joint systems are widely used in underground and buried distribution cable routes. Confirm voltage class, cable structure, and sealing system before final model selection.

The main families are cold shrink outdoor terminations, indoor terminations, and straight-through joints. Each family is further matched by voltage class, cable core type, and conductor cross-section range.

Common options include cold shrink terminations, heat shrink terminations, pre-molded separable interfaces, and resin/compound-based systems. Selection depends on project standards, environment, maintenance strategy, and installation conditions.

For engineering applications, professional controlled heating equipment is typically required for heat shrink systems. Household devices usually cannot provide stable temperature distribution for reliable electrical installation quality.

Provide voltage class, application type (indoor/outdoor/joint), cable core structure (single-core/3-core), conductor cross-section, and quantity plan. These inputs are the key parameters for mapping SEC4 model tables.