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Insul Tube For Fiber Optic Closure

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Insultube-Commercial (GSF) is a heat shrinkable tubing used in the installation of Fibre Optic Closures. These tubes are designed to insulate and seal the inlet of a cable to the base of the closure. Manufactured from high-quality cross-linked polyolefin, they feature a hot melt adhesive to provide a perfect environmental seal on the cable sheath.

Features and Benefits

Diagram

Selection Chart

Selection Chart
Code No.Supplied Diameter (mm)Recovered Diameter (mm)Recovered Wall Thickness
(±10%) (mm)
GSF 12/41242.0
GSF 17/61762.0
GSF 30/83082.5
GSF 35/1235122.5
GSF 40/1640162.5
GSF 50/2050202.5
GSF 65/2265222.5
GSF 75/2575253.0

*All dimensions are in mm. d,D : Internal Diameter.

Technical Specification

Technical Specification
PROPERTIES VALUE STANDARD
Physical
Tensile Strength 11 N/mm² (Mpa) (Min.) ASTM D638
Ultimate Elongation 350% (Min) ASTM D638
Longitudinal Change -10% (Max.) ASTM D2671
Water Absorption 0.5% (Max.) ASTM D570
Thermal
Accelerated Ageing (120°C / 500 hrs) (120°C / 500 hrs) ASTM D2671
Tensile Strength 11 N/mm² (Mpa) (Min.) ASTM D638
Low Temp. Flexibility (-40°C / 4 hrs) No cracking ASTM D2671
Heat Shock (250°C / 30 min.) No cracking or flowing ESI 09-11
Shrink Temperature Limit 125°C IEC 216
Continuous Temperature Limit -40°C to +110°C IEC 216
Electrical
Dielectric Strength 12 kV/mm (Min) ASTM D149
Volume Resistivity 1 × 10¹⁴ Ohm.cm (Min) ASTM D257
Dielectric Constant 5 (Max.) ASTM D150

Certificates

FAQs

1. What is a Screened Separable Connector?

A Screened Separable Connector is a medium-voltage cable accessory used to connect power cables to transformers, switchgear, or other equipment. It is fully screened and separable, allowing safe installation, disconnection, and maintenance.

They are commonly used for 3.6 kV to 36 kV medium-voltage applications, depending on the connector design and standards.

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