In the high-stakes world of power distribution, electrical insulation is only the first line of defense. To truly guarantee the uptime of a substation or a data center, the protective materials must also withstand environmental contaminants, mechanical stress, and even biological interference. The Volsun MPRS series Busbar Heat Shrink Tubing acts as a holistic shield, protecting the copper and aluminum heart of your system from the unpredictable reality of the field.


Preventing Environmental Arcing Electrical systems are often located in environments where dust, moisture, and chemical vapors are present. These contaminants can settle on bare busbars, creating "conductive paths" that lead to catastrophic flashovers.

• Tracking Resistance: MPRS tubing is engineered for resistance to electric carbon marks, ensuring that even in polluted environments, the surface of the tube does not become a path for leakage currents.

• Weather and Moisture Seal: Once shrunk, the tubing provides a tight, moisture-proof seal that prevents oxidation and corrosion of the busbar material

• Thermal Endurance: Passing the thermal shock test at 250C (for 1kV) and maintaining flawless performance after aging at 130C proves that this material can handle the heat spikes of a short circuit without failing.

A Barrier Against Biological and Physical Hazards Small animals—such as snakes, rats, and birds—are a leading cause of outages in indoor switchgear. The MPRS series effectively eliminates this risk by insulating the live conductors, preventing a "bridge" between phases even if an animal enters the cabinet.

• High Mechanical Strength: With a tensile strength of more than 8.0MPa, the sleeves resist tearing and puncture, providing a physical layer of protection during cabinet maintenance or equipment vibration.

• Low Smoke and Flame Retardancy: In the event of an external fire, the low-smoke, radiation-crosslinked material helps prevent the spread of flames, protecting surrounding critical infrastructure.

The Strategic Choice for Indoor Substations From the 1kV low-voltage switchgear to 35kV high-voltage bus bar systems, Volsun’s MPRS series heat shrink tubing is more than a component—it is an insurance policy for your grid. By meeting rigorous standards like DL/T 1059-2007 and ASTM D 2671, we ensure that our tubing provides the technical index necessary for global power projects. When reliability cannot be compromised, the MPRS series provides the comprehensive protection your power system deserves.

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• SALES CONTACT: volsun2006@szvolsun.com