Heat Shrink Busbar Tubing
  • Cross linked polyolefin material
  • Anti-Track
  • Reduces Bus bar clearance
  • High dielectric strength
  • Flame retardant
  • Protects against accidental flash overs
  • Halogen free
  • Compliance with ESI 09-11 standard
TECHNICAL SPECIFICATION 

Properties

Value

 Standard

Physical

    
  Tensile Strength   8 N/mm2 (MPA)   ASTM D638
  Ultimate Elongation   300% (Min.)   ASTM D638
  Density   1.20 +/-  0.2 gm/cm3   ASTM D792
  Hardness   45 +/- 10 Shore D   ASTM D2240
  Water Absorption   0.5 % (max.)   ASTM D570

Thermal 

    
  Accelerated Ageing
  Tensile Strength
  Ultimate Elongation		   (120oC for 500 Hrs)
  7 N/mm2 (Mpa) (min.)
  250  % (Min.)		   ASTM D2671
  ASTM D 638
  ASTM D 638
  Low temperature Flexibility
  (-40oC for 4 Hrs.)		   No Cracking   ASTM D2671
  Heat Shock 
  (250oC for 30 Min.)		   No Cracking or flowing   ESI 09-11
  Shrink Temperature   125oC   IEC 216
  Continuous Temperature limit   -40oC to  + 100oC   IEC 216

Electrical

    
  Dielectric Strength   15 KV/mm. (Min.)   ASTM D149
  Volume Resistivity   1 x 1014 Ohm.cm(min.)   ASTM D257
  Dielectric Constant   5 (Max.)   ASTM D150
  Resistant to track & erosion   No tracking,erosion or  
  flame failure upto 3.25 
  KV for 20 min.		   ASTM D2303

Medium Wall  Bus Tubing

Suitable for insulation  of medium voltage Bus bar upto 25 KV to reduce the distance between two phases in switchboards..

  • Standard  length 1000mm and 1200mm

  • Standard colour Red.

Code

D Min
(mm)

D Max
  (mm)

          T
      (mm)
GMB 25/8 25 8 2.5
GMB 30/12 30 12 2.5
GMB 40/16 40 16 2.5
GMB 50/20 50 20 2.5
GMB 75/28 70 28 3.0
GMB 100/28 100 38 3.0
GMB 120/42 120 42 3.0
GMB 160/50 160 50 3.0

Heavy Wall Bus Tubing

Suitable for insulation  of medium voltage Bus bar upto 36 KV to reduce the distance between two phases in switchboards..

Also suitable for insulation of connectors for LV Joints

  • Standard length 1000mm and 1200mm

  • Standard colour Red.

Code

D Min
(mm)

D Max
  (mm)

T    (mm)
GHB 25/8 25 8 3.7
GHB 30/12 30 12 4.0
GHB 40/16 40 16 4.0
GHB 50/20 50 20 4.0
GHB 75/28 75 28 4.0
GHB 100/28 100 38 4.2
GHB 120/42 120 42 4.2
GHB 160/50 160 50 4.5

Clearances with Insulation
Voltage

Medium Wall Tube (GMB)

Heavy Wall Tube (GHB)
Ph. to Ph. (mm) Ph. to gr. (mm) Ph. to ph (mm) Ph. to gr.(mm)
15 KV 86 106 55 65
25 KV 114 152 70 100
36 KV 190 280 140 190