Heat Shrink Tri-Core Rain Shed for 3 Core Terminations (GRST)

About Heat Shrink Tri-Core Rain Shed for 3 Core Terminations (GRST)

On a three-core outdoor termination each core needs extra surface creepage distance in wet weather. Single-core sheds do this one core at a time. Gala's tri-core rain shed does it with one part: a flat, rounded-triangle skirt carrying three short collars, so a single shed sits across all three cores where they leave the crutch.

The shed is moulded from non-tracking cross-linked polyolefin and coated inside with water-resistant mastic. Each core passes through its own collar and the collars are heat-shrunk onto the cores (shrink temperature 125 deg C). The skirt then stands across the three cores, increasing the surface creepage path and breaking the continuous film of water that forms along wet cores, without any increase in tail length. It suits indoor and outdoor terminations.

Three sizes are made, all with a 152 mm skirt; collars recover to 16 mm (GRST-1) or 22 mm (GRST-2 and GRST-3). Gala's guaranteed values include tracking resistance (no tracking, erosion or flame failure at 3.25 kV for 20 minutes, ASTM D2303), 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 tri-core rain shed (creepage extension skirt for 3-core terminations)
• Material: Non-tracking cross-linked polyolefin
• Colour: Red
• Operating temperature: -40 to +100 deg C (continuous)
• Size range: GRST-1 to GRST-3, skirt 152 mm, collars recovering to 16 or 22 mm
• Adhesive / sealant: Water-resistant mastic coating inside
• Application: Creepage extension on 3-core indoor and outdoor cable terminations
• Installation: Pass each core through a collar; heat-shrink the collars 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. A = skirt size, base to apex of the triangle (printed "dia A" on the sheet).
• Code | Skirt A (min) | Collar ID supplied (+/- 3) | Collar ID recovered (max) | Collar height (min) | Wall
• GRST-1 | 152 | 35 | 16 | 25 | 2.8
• GRST-2 | 152 | 45 | 22 | 25 | 3.0
• GRST-3 | 152 | 50 | 22 | 25 | 3.0

Applications: Outdoor 3-core cable terminations, indoor 3-core cable terminations, power distribution utilities, substations, cable jointing contractors, industrial switchyards