Industrial Electrical Engg Company

Established since 1921

IS 2036 – 1995 Grade F4

Technical Description: These are fabric base Bakelite Sheets confirming to specification, as per IS 2036, Bakelite sheets of Grade F4 are manufactured from medium weaved, fabric and posses very good die electrical properties and medium mechanical strength.

Application:
Generator Slot Wedge insulation, busbar supports and Armature Wedges etc.

Thickness:
Thickness of Bakelite sheets ranges from
0.5 MM – 150 MM.

Size:
Standard size of sheets: 1220 x 1220mm (4 ft x 4 ft) or 1220mm x 610 (4 ft x 2 ft) or
610mm x 610mm (2ft x 2ft) or 2440mm x 1220mm (8ft x 4ft).

Tolerance:
Bakelite Sheets are supplied as per tolerance specified in IS:2036. More closer tolerance can be met as per customers’ specific requirement.

Colors:
Available Bakelite sheet colors are natural brown, dark brown or black.

 Technical Data as per IS 2036 -1995 Grade F4:

Properties    

Units

Average Test

Results

Value As PerIS: 2036- 1995
Electrical
Insulation Resistance after immersion in water for 24 hrs at 20˚C Meg Ohms

300

50 Min.

Electrical Strength in Oil at 90˙C
Flat wise (3.0 mmThickness) Kv/ mm

4.5 Min

4.0 min

Edgewise (12.7 mm Thickness) Kv

25

15.0 Kv

Mechanical
Tensile strength Kgf/cm²          600

Flexural Strength / Cross Breaking strength Kgf/cm²          1225       1000 Min.
Impact Strength (Edgewise Charpy method KJ/m²            9

7 Min

Specific Gravity           1.33

Water Absorption (Specimen size  -50  + 1mm square)      
Thickness mm   1.6 2.0 5.0 20.0
Maximum Value mg  145 151 175 253
Typical Value Results mg  35 41 62 85


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