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 | |