Heat Shrink Rain Shed / Creepage Extension Skirt (Insulshed, Grs)

On an outdoor cable termination, rain forms a continuous film of water along the insulated core. Leakage current along that wet surface causes tracking and, in the worst case, flashover. A longer surface path, or one interrupted by a skirt, reduces that risk. Gala's INSULSHED rain shed adds that skirt without lengthening the core.

Each shed is a bell-shaped skirt with a short collar, moulded in non-tracking cross-linked polyolefin and coated inside with water-resistant mastic. The collar is shrunk onto the core of the termination at 125 °C; the skirt stands off the core and sheds water, increasing the surface creepage distance and breaking the continuous water film in the rainy season. Several sheds can be fitted along one core where more creepage is needed.

Sizes are chosen by core diameter: ten sizes from GRS 130-1 to GRS 130-6, with collars recovering to 15 to 50 mm and skirt diameters from 90 to 200 mm. The sheds suit indoor and outdoor terminations.

The material is tracking-resistant: Gala guarantees no tracking, erosion or flame failure at 3.25 kV for 20 minutes in the ASTM D2303 inclined-plane test. Other guaranteed values include 15 kV/mm minimum dielectric strength, 12 N/mm2 minimum tensile strength and a continuous temperature limit of -40 to +100 °C. Gala is an ISO 9001, ISO 14001 and ISO 45001 certified manufacturer.

Manufactured by Gala in India. Datasheet and size selection on request.