Silicone-coated fiberglass sleeve 1.5 kV 1.5-2 mm WSG /10m/ WSG-1,5-2

Application in High Temperatures and Insulation Protection

The electro-insulating tube with an inner diameter of 2 mm is a solution dedicated to applications where standard PVC sleeves fail to perform adequately. Made from fiberglass coated with self-extinguishing silicone rubber, it provides reliable protection for conductors in circuits operating at elevated temperatures. Thanks to insulation class H, this material withstands continuous operation in the temperature range from -45°C to +200°C, making it an ideal choice for insulating windings in electric motors, heaters, industrial equipment, and other devices generating significant heat.

The white silicone coating not only protects against dielectric breakdown at 1.5 kV (with a safety margin up to 4 kV) but also imparts flexibility and resistance to mechanical damage. Unlike rigid sleeves made of pure fiberglass, the silicone-coated version is easier to install and conforms better to the conductor's shape, even in tight spacing conditions.

Key Properties and Structural Advantages

The product combines the thermal strength of fiberglass with the chemical resistance and flexibility of silicone. As a result, the tube:

• Self-extinguishes after removal of the ignition source – meeting VW-1 standard requirements, which is crucial for installation safety.
• Contains no metal – eliminating the risk of corrosion or additional current paths in case of conductor insulation damage.
• Operates over a wide temperature range – from freezing outdoor conditions (-45°C) up to hot machine zones (up to +200°C).
• Provides high dielectric strength – breakdown resistance of 4 kV, exceeding the nominal operating voltage of 1.5 kV.

The material is flame-retardant and complies with rigorous safety standards, including UL 1441 and IEC 60684-2. Although it is not halogen-free (which is typical for many high fire-resistance silicone materials), its self-extinguishing properties minimize the risk of fire spread.

Installation and Practical Application in Systems

Installation of the WSG-1,5-2 tube requires only cutting the appropriate length and sliding it onto the conductor or terminal. Thanks to the flexibility of silicone, the tube does not crack during bending nor detach from the substrate under machine vibrations. This solution is widely used by installers during electric motor repairs and when upgrading heating equipment, where it is necessary to protect connections from overheating and short circuits. The product contains no metallic reinforcement elements, simplifying its processing and disposal in compliance with the RoHS directive.

In practice, this enables safe operation in environments with temperatures up to +200°C while maintaining an inner diameter of 2 mm. The white coating color facilitates identification of connections in complex control systems or industrial machinery. This tube provides a barrier against dielectric breakdown at 4 kV, offering a substantial safety margin at the nominal working voltage of 1.5 kV. The absence of metallic armor keeps the product lightweight and easy to fit even in hard-to-reach areas of machines or heating devices.