Heat Shrink Rain Shed / Creepage Extension Skirt (INSULSHED GRS)

About 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 deg 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 deg C. Gala is an ISO 9001, ISO 14001 and ISO 45001 certified manufacturer.

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

Specifications

• Brand: Gala
• Product type: Heat-shrinkable rain shed (creepage extension skirt) for cable terminations
• Material: Non-tracking cross-linked polyolefin
• Colour: Red
• Operating temperature: -40 to +100 deg C (continuous)
• Size range: GRS 130-1 to GRS 130-6, collar recovering to 15 to 50 mm, skirt 90 to 200 mm diameter
• Adhesive / sealant: Water-resistant mastic coating inside
• Standards tested to: Material XRF-screened for cadmium, lead, mercury and chromium by TCR Engineering (NABL-accredited lab), 2020 - none detected
• Application: Increasing creepage distance on indoor and outdoor cable termination cores
• Installation: Heat-shrink the collar onto the core with a gas torch
• Country of origin: India
• Shrink temperature: 125 deg C
• Tracking resistance: No tracking, erosion or flame failure at 3.25 kV for 20 min, ASTM D2303 (Gala guaranteed value)
• Dielectric strength: 15 kV/mm min (ASTM D149)
• Tensile strength: 12 N/mm2 min (ASTM D638)
• Elongation: 350 % min (ASTM D638)

Sizes

• All in mm.
• Code | Skirt dia A (min) | Collar ID supplied (min) | Collar ID recovered (max) | Collar height (min) | Skirt angle (min) | Wall
• GRS 130-1 | 90 | 36 | 15 | 20 | 10 deg | 2.5
• GRS 130-2 | 122 | 51 | 21 | 22 | 10 deg | 3.0
• GRS 130-3 | 135 | 67 | 31 | 26 | 10 deg | 3.0
• GRS 130-4 | 138 | 80 | 35 | 30 | 10 deg | 3.0
• GRS 130-5 | 138 | 105 | 35 | 35 | 10 deg | 3.0
• GRS 130-6 S | 200 | 120 | 50 | 50 | 10 deg | 4.5
• GRS 130-6 | 200 | 150 | 50 | 45 | 20 deg | 4.5
• Also listed by Gala: GRS 130-1 N, GRS 130-2 N, GRS 130-3 N (dimensions being re-confirmed - give on enquiry).

Applications: Outdoor cable terminations, indoor cable terminations, power distribution utilities, substations, cable jointing contractors, industrial switchyards, renewable energy plants