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Switchgear Insulation Products
  High Voltage Insulation Sheets - BUSSHEET


 
Bus Sheet GMHS & GHHS is an adhesive coated heat shrinkable sheet, which provides insulation enhancement & protection against accidentally induced discharge. It is suitable to insulate almost any sizes or shapes of busbar joint like busbar tees, elbows and other connections where tubing and tape can not be used.


 
After applying heat, this sheet shrinks to tightly conform to complicated shapes. Gala mastic tape can also be added to ensure that protruding shapes are insulated. The sheet is manufactured from high quality non tracking crosslinked polyolefin material & meets ANSI C37.20.2 standards for MV application upto 36KV. GMHS sheet shall provide flashover protection up to 17.5KV. & GHHS sheet shall provide protection up to 36KV.




 
 
FEATURES & BENEFITS :-
  • Easy to install on site using a gas torch or hot air gun.
  • Prevents Busbar from chemical corrosion v effected by strong acid, alkali, salt, etc.
  • Halogen free, flame retardant.
  • High dielectric strength.
  • Excellent UV & weather resistant v properties,& hence suitable for indoor or outdoor use.
  • Reduces BusBar Clearance.
  • No Special Mould / Tool required.
  • Meets IP 68 (ingress Protection)
Technical Qualification Report : QR 1019
TECHNICAL SPECIFICATION

TEST DESCRIPTION

RECORDED VALUE

 TEST METHOD

Physical

    
Tensile Strength 12 N/mm2 (MPA) (min.) ASTM D638
Ultimate Elongation 300% (min.) ASTM D638
WaterAbsorption 0.5% (max.) ASTM D570
Hardness 45 ± 10 shore D ASTM D2240

Thermal 

    
Accelerated ageing (120oC for 500 Hrs) ASTM D2671
Tensile Strength 10 N/mm2 (Mpa) (min.) ASTM D 638
Ultimate Elongation 250% (Min.) 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 Temp. Limit -40oC to  + 105oC IEC 216

Electrical

    
Dielectric Strength 22 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


CLEARANCES WITH INSULATION
Voltage Medium wall Sheet (GMHS) Heavy Wall Sheet (GHHS) UN-Insulated
Bus bars
Ph. To Ph. Ph. to gr. Ph. to Ph. Ph. to gr.
12KV 65 75 35 45 120
17.5 KV 85 105 55 65 160
24 KV 115 150 70 100 220
36 KV 200 285 140 190 320

 
 
PRODUCT SELECTION
For 'T' Connection For 'L' Connection

BUSBAR WIDTH (mm) CUT SIZE NEEDED (mm) NO. OF INSTALLATIONS
PER SHEET
25 275 x 225 8
50 325 x 250 6
75 400 x 275 4
100 450 x 325 3
150 550 x 425 2

BUSBAR WIDTH (mm) CUT SIZE NEEDED (mm) NO. OF INSTALLATIONS
PER SHEET
25 275 x 175 10
50 325 x 225 7
75 400 x 250 5
100 450 x 275 4
150 550 x 325 2

Note : The above table should be used as a guideline only. Please try with one or two joints before adopting final cut size. The busbars are assumed to be insulated to 25mm. from the joint. Cut size should extend minimum of 100mm. on each leg of the joint before shrinking and should overlap existing insulation by 65mm. after shrinking.
ORDERING INFORMATION
GALA CODE LENGTH
Ls (mm)		 WIDTH
Ws (mm)		 THICKNESS (Tf)
SHEET (mm) ADHESIVE (mm) TOTAL THICKNESS (mm)
GMHS 1200 430 3 1.5 4.5
GHHS 1200 430 4 1.5 5.5
VOID FILLING MASTIC 300 60 - - PIECE
SEALANT MASTIC 300 20 - - PIECE
TOOL - 1 (BASIC CLAMP AND BRACKET KIT) KIT
TOOL - 2 (EXTENDED CLAMP AND BRACKET KIT) KIT

Note : If required, one piece of Red sealing mastic is applied on each leg of the joint and one or two pieces of Black sealing mastic is used to cover uneven shapes.
 
 
Heat Shrinkable Joints & Terminations
 
 
Heat Shrinkable Tubes / Heat Shrink Sleeves
 
 
Heat Shrinkable Moulded Shapes
 
 
Switchgear Insulation Products
 
 
  Bus Bar Tubes
 
 
  Bus Bar Insulating Shrouds
 
 
  Bus Bar Insulating Shrouds - Polyolefin
 
 
  Bus Bar End Caps
 
 
  Thin wall Tube - Wire Marking
 
 
  Bushing Boot/Bellows
 
 
  PVC Terminal Cap
 
 
  Terminal Insulation Cover
 
 
  High Voltage Insulation Sheets
 
 
  Heat Shrink Tape
 
 
Heat Shrinkable Wrap Around Sleeve
 
 
Polymeric Standoff Insulators
 
 
PVC Cap
 
 
Miscellaneous
 
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  Heat Shrinkable Joints & terminations Cable Joints   |   Cable Terminations   |   Test Specifications  |   36 kV Cable Joints & Terminations
1.1 KV Cable Joints & Terminations  |   Cablink
  Heat Shrinkable Tubes Advantages Of Heat Shrink Tubing   |  Low Voltage Tubes  |  Red Insulation Tubes  |  Non Tracking Tube  |  Busbar Tubes  |  Thin Wall Tubes  |  Semi Conductive Tubes  |  Oil Barrier Sleeves  |  Insultube  |  Heat Shrink Sleeves
  Heat Shrinkable Moulded Shapes Cable End Caps   |   Low Voltage Breakout   |   Anti-Tracking Breakout   |  Rain Sheds  |  Right Angle Boot/Straight Boot  |  Semi conductive Cable Breakout  |  Anode Cap  |  De Gassing End Cap
  Switchgear Insulation Products Busbar Tubes  |  Busbar Insulating Shrouds  |  Busbar End Caps  |  Bushing Boot/Bellows  |  PVC Terminal Cap  |  Terminal Insulation Cover  |  High Voltage Insulation Sheets  |  Heat Shrink Tape  |  Bustube  |   Busboot
  |   Bus Bar End Caps  |   Protection Shroud  |   Protection Cover
  Heat Shrinkable Wrap Around Sleeve  
  Polymeric Insulators

Support Isulator
  PVC Cap  
  Miscellaneous Constant Force Spring  |  Mastic Tape  |  Clamps

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