PRESSBOARD (PRESS BOARDS)
UMANG BOARDS PVT. LTD. specializes in providing a wide variety of electrical insulation board to meet everyday manufacturing needs.
Purchase orders and shipments are consolidated to reduce ordering costs. Individual components, complete systems, and engineering services can be combined into one order.
Whether you need large or small quantities, individual components or entire systems, we search for the best source at the best value to insure your orders will ship on time.
Our complete outsource services include production planning and inventory control management as well as technical engineering services and design assistance.
You may only need one source for all your transformer needs. 



General Classification

UB-HD–3.1 is made from high purity sulphate kraft wood pulp and carefully selected cotton pulp. This is a relatively soft, flexible and oil absorbent board used where good electrical strength in oil and moderate mechanical strength is desired.

Standard thickness of Solid Board
(in mm) 0.8, 1.0, 1.5, 2.0, 3.0

Thickness between 4.0 and 6.0 mm is supplied on specific request and thicknesses above 6.0 mm upto 50.0 mm are supplied in laminated form.
Standard Sheet Size
(in mm)
Width
Length
1160
2200

Tolerances

on Thickness
<= 1.5 mm± 7.5 %
> 1.5 mm± 5.0 %

on sheet size
± 5 mm


Non-standard thickness and sheet size can be produced within the range. However, minimum order quantity will be 2.5 tonnes.

 
UB-HD–3.1
S. No.
Properties
Units
UB-HD–3.1
1. Thickness

< = 1.5 mm

> = 1.5 mm

 mm  

± 7.5 %

± 5.0 %
2. Apparent Density

< = 1.5 mm

> = 1.5 – 3.0 mm

> = 3.0 – 6.0 mm

 gm / cc  

1.00-1.20

1.10-1.25

1.15-1.30
3. Tensile Strength

< = 1.5 mm

> = 1.5 – 3.0 mm

> = 3.0 – 6.0 mm

 N / m

m Sq.

  

100/75

105/80

110/85
4. Elongation % 3 / 4
5. Compressibility in Air
 
< = 1.5 mm

> = 1.5 -  3.0 mm

> = 3.0 – 6.0 mm

 % Max.  

10.0

  7.5

  4.0
6. Rev. Compressibility in Air

< = 1.5 mm

> = 1.5 – 3.0 mm

 % Min.

 

45

50
7.  Shrinkage in Air

                   MD
 
                CMD

                   PD

 Max. %  

0.5

0.7

5.0
8. Cohesion between plies Pass/Fail Pass/Fail
9. Moisture Content Max. % 6.0
10. Ash Content Max % 1.00
11. Conductivity of Aq.

Extract

< = 1.5 mm

> = 1.5 – 3.0 mm

> = 3.0 – 6.0 mm

 Max

(mS/m)
 

5.00

6.00

8.00
12. PH of Aq. Extract -

6.0 – 9.0
13. Oil Absorption

< = 1.5 mm

> = 1.5-3.0 mm

> = 3.0-6.0 mm

 Min. %

 

11.0

9.00

7.00
14. Electric Strength

BDV

< = 1.5 mm

> = 1.5-3.0 mm

> = 3.0-6.0 mm

 <v/mm  

 

12/40

11/35

10/30
15. Finish - MAT FINISH
 

 

As per

IEC–60641-3-1(B-3.1)
DATE: 01.09.2002

REF. : UB / QPLAN / 04

   

The technical Data for TRANSFORMER BOARD reflect typical results of our routine tests performed in UMANG BOARDS PVT. LTD. laboratories according to IEC 60641-3-1(B-3.1)


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