Group of Company  
 
 
Group of Activities  
 

Sunil Kumar Rai
  
 
 
 
Ashok Rai Board

We have commenced manufacturing of
Electrical grade insulating press board conforming to Type 'C' of I S 1576:1992 as well as
IEC 60641-Type B 4.1

We are supplying the vital raw material since three decades to the following leading manufacturers of
the above products.

1)Senapathy Whitely (p) Ltd .Ramanagaram.
2) Raman Boards, Unit I, Tandavapura,Mysore.
3) Raman Boards,Unit II,Sonepet.

With a view to cater to the ever increasing demand for the above product we have moved towards forward integration program of manufacturing the Electrical insulating Press Board.

We will be shortly offering other grades of insulating press board conforming to type 'D' and various other components to make our company as a one stop shop for Transformer insulation.
 
Products
Press Boards
PRODUCT CODE THICKNESS RANGE SIZE-MAX*1
ATTAL 001-IS 1576:1992
Grade type "C"
STANDARD
SPECIFICATION		 0.8mm To 6mm
Tolerance
<1.6mm = +-7.5%
>1.6to 6.35mm =+-5%		 2000x
900mm
ATTAL 002-IN HOUSE
SPECIFICATION		 0.8mm To 6mm
Tolerance
<1.6mm = +-7.5%
>1.6to 6.35mm =+-5%		 2000x
900mm
 
Press Boards Type C
Property Units Specification as per IS 1576 of 1992
Thickness mm Clearance tolerance :
1.  +/- 7.5 %  <  1.6mm,
2. +/- 5 %  > 1.6mm.
Density g/cm3 0.90 g/cm3 to 1.10 g/cm3
Electric strength in oil kv  Minimum :13 kv
Flexibility Weather the sheet crakes or not If cracks - not acceptable
Does not cracks - acceptable
Cohesion between piles Visual test The split shall repute one or more piles and have distinctly ragged or hairy appearance
Ash content % Max 2%
Oil Absorption % Min 20%
Machinability Visual test No ragged edges after punching
Conductivity of aqueous mΩ/cm Max 70 mΩ/cm
pH value of the aquous extract pH Min.7 & Max.9.5
 
Press Boards Type D (Pre Compressed Board)
Property Units Specification as per IS 1576 of 1992
Thickness mm Clearance tolerance :
1.  +/- 7.5 %  <  1.6mm,
2. +/- 5 %  > 1.6mm.
Density g/cm3 1.10 g/cm3  (minimum)
Electric strength in air kv  Minimum :10 kv for 1 minits
Electric strength in oil kv  Minimum :18 kv for 1 munits
Flexibility Weather the sheet crakes or not If cracks - not acceptable             Does not cracks - acceptable
Cohesion between piles Visual test The split shall repute one or more piles and have distinctly ragged or hairy appearance
Oil Absorption % Min 15%
Machinability Visual test No ragged edges after punching
Conductivity of aqueous mΩ/cm Max 70 mΩ/cm
pH value of the aquous extract pH Min.5 & Max.9.5
Ash content % max 2%
 
Kraft Paper
Property Units Specification as per IS 9335 of 1979
Thickness mm Clearance tolerance :
0.076 to 0.083
Density g/cm3 0.75 g/cm3 to 0.85 g/cm3
moisture % 8%max
Electric strength in Air kv  Minimum :7 kv/mm
Ash content % Max 1%
Conductivity of aqueous mΩ/cm Max 10 mΩ/cm
pH value of the aquous extract pH Min.6 & Max.8
 
Components
PRODUCT CODE THICKNESS RANGE SIZE-MAX*1
ATTAL001/
STRIP-Grade
type"C" IS 1576:1992
STANDARD
SPECIFICATION		 0.8mm To 6mm
Tolerance
<1.6mm = +-7.5%
>1.6to 6.35mm =+-5%		 Custom Made
ATTAL002/
STRIP-IN HOUSE
SPECIFICATION		 0.8mm To 6mm
Tolerance
<1.6mm = +-7.5%
>1.6to 6.35mm =+-5%		 Custom Made
ATTAL001/
BLOCKS-IS 1576:1992
SPECIFICATION		 0.8mm To 6mm
Tolerance
<1.6mm = +-7.5%
>1.6to 6.35mm =+-5%		 35mmX45mm
40mmX65mm
ATTAL002/
BLOCKS-IN HOUSE
SPECIFICATION		 0.8mm To 6mm
Tolerance
<1.6mm = +-7.5%
>1.6to 6.35mm =+-5%		 35mmX45mm
40mmX65mm
Specification
ASHOK RAI BOARDS MATERIAL
SPECIFICTION		 REF
PB/ATTAL001-
GRAY BOARDS
SOLID PRESS BOARD FOR ELETRICAL SPECIFICATION & MULTIPURPOSE
INDIAN STANDARD (IS) TYPE "C"
IS - 1576:1992
PROPERTY GRADE 1
1. Electric Strength:-
  
i. Air at 90 C,kv Sample Punctured at 8 kv
ii. Oil at 90 C,kv Sample withstood 27 kv for 1 minute without puncture
2. Tensile Strength:-
 MD - 530kg/cm2,CMD267 kg/cm2
3. Shrinkage:-
  
1. Shrinkage in air%:-  
i. Machine Direction (M.D) 0.40
ii. Cross Machine Direction (C.M.D) 0.66
iii. Perpendicular 3.57
2. Shrinkage in Oil % :-  
i. Machine Direction (M.D) 0.11
ii. Cross Machine Direction (C.M.D) 0.18
iii. Perpendicular 0.37
4. Flexibility Test:-
  
i. Machine Direction The sample shall withstand 20 Nos of folds without splitting or parting of either surface ply across the full width of the test piece. (Obtained Value--Withstood)
ii. Cross Direction
5. Oil Absorption %
 33
6. Mineral Ash %
 1.50
Ph Of Aqua Extract 7
Foreign matters:- Iron, Plastic, rubber, ploy then, Zari, metal pieces & synthetic fibers Nil
Density 0.98 to 1.15 g/cm2
Thickness Range 0.8mm To 6mm
Confirmed By:- Mr. Sunil Kumar Rai (Partner)
(Computer generated report signature not required)
 
Address : New # 174 (Old # 127), Adam Sahib Street, Royapuram, Chennai - 600 013.
+91-44-25900562,+91-44-25902075
9840095424, 9444467964, 9840056446
sunil@ashokraigroup.com
Copyright © 2014 Ashok Rai Group. All Rights Reserved.