Cold Shrink Single-Core Joints – Fast, Reliable Cable Termination for MV Systems

When it comes to connecting medium-voltage single-core cables in the field, few solutions match the simplicity and reliability of cold shrink single-core joints. Designed for quick, flame-free installation without the need for heat or special tools, cold shrink technology has become the preferred choice for many utilities, EPCs, and cable installers around the world.

Why Cold Shrink Technology Stands Out

Unlike heat shrink joints that require torching and strict environmental conditions, cold shrink joints are factory-expanded on removable plastic cores. Once positioned over the cable, the inner core is removed, and the joint body contracts to form a tight, uniform seal.

Key advantages:

·Tool-free installation – no open flame, ideal for confined or hazardous areas

·Consistent radial pressure – ensures reliable insulation and moisture sealing

·Time-saving – significantly reduces field installation time

·No heating risks – safe for use near flammable materials or sensitive electronics

Focus on Single-Core Cable Systems

In urban substations, wind farms, and compact switchgear layouts, single-core MV cables are often preferred for flexibility and ease of routing. Cold shrink single-core joints are specially designed to:

·Match the insulation type (XLPE or EPR)

·Handle voltages from 10kV to 35kV

·Resist tracking, UV, and water ingress

·Accommodate armored or unarmored cables

Installers appreciate how the pre-expanded bodies eliminate sizing guesswork and minimize errors under field pressure.

Typical Application Scenarios

·Distribution network upgrades

·Wind and solar project cable connections

·Factory-built switchgear terminations

·Underground repair and splicing tasks

With growing demand for modular, maintenance-free solutions, cold shrink joints are increasingly used in OEM cable assemblies, power skids, and temporary energy installations as well.

Quality Supply Matters

To get consistent performance from cold shrink joints, the source matters. Look for suppliers that:

·Use high-grade silicone or EPDM for long-term elasticity

·Provide full kit components (stress control, shielding, sealant, etc.)

·Offer testing to IEC or IEEE standards

·Support both IEC and ANSI cable sizes

PUTAI Electric, for example, supplies a range of cold shrink single-core joints with:

Factory-tested stress cone structures

Quick-install spiral cores

Configurations for 24kV and 35kV systems

Customizable kits based on project needs