Bharat Insulation Company is a trusted manufacturer, supplier, and exporter of high-performance enamelled and fibreglass-covered aluminium winding wires based in Mumbai, India. These wires are precisely engineered to meet the demanding requirements of modern electrical equipment. Available in both rectangular and round profiles, they comply with IS and IEC standards (IS:13730, IS:4685, IEC 60317) and are offered in Class 155 and Class 180 variants. Designed for use in F- and H-class motors, transformers, and coils, our products provide superior elongation, high thermal shock resistance, enhanced dielectric strength (BDV up to 3200V), and excellent flexibility with double-grade G2 glass covering. Ideal for high-temperature and high-performance environments, our winding wires ensure long-lasting efficiency, mechanical strength, and electrical reliability across a wide range of industrial applications.
Enamelled or varnish-coated aluminium wires are manufactured by insulating high-purity aluminium conductors with a uniform layer of polymer-based enamel. Combined with fibreglass-covering and varnish treatment, these wires offer superior mechanical strength, thermal endurance, and electrical insulation.
| Property | Type Class | Bare 155 Class | Bare 180 Class |
|---|---|---|---|
| Standard | IS:4685 | Part I | Part I |
| Covering | Double | Double | Double |
| Elongation (%) | IS - Min | 25 | 25 |
| BIC Value | 30 | 30 | |
| Flexibility (No Crack) | IS | 10 X d | 10 X d |
| BIC Value | 6 X d | 6 X d | |
| Heat Shock 48 HRS. Unbent | IS | 175 Deg. C | 200 Deg. C |
| BIC Value | 200 Deg. C | 220 Deg. C | |
| Tackiness 65 DEG. C-5 Min | IS | No Tacky | No Tacky |
| BIC Value | No Tacky | No Tacky | |
| BDV (V) | IS - Min | 450 | 450 |
| BIC Value | 750 | 750 | |
| Range (mm) | 3.0 to 8.0 | 3.0 to 8.0 |
| Property | Type Class | Bare 155 Class | Bare 180 Class | Enamelled 155 Class | Enamelled 180 Class |
|---|---|---|---|---|---|
| Standard (Ref.) | IS:13730 | Part 32 | Part 31 | Part 32 | Part 31 |
| IEC - 60317 | Part 32 | Part 31 | Part 32 | Part 31 | |
| Size | mm | 2.5 mm T | 2.5 mm T | 2.5 mm T | 2.5 mm T |
| Covering | Double | Grade G2 | Grade G2 | Grade 2 G2 | Grade 2 G2 |
| Elongation (%) | IS/IEC - Min. | 25 | 25 | 25 | 25 |
| BIC Value | 32 | 40 | 40 | 40 | |
| Springness (DEG.) | IS/IEC - Max. | - | - | - | - |
| BIC Value | 3.5 | 3.5 | 3.5 | 3.5 | |
| Flexibility (NO CRACK) | IS/IEC | 10 x w/T | 10 x w/T | 10 x w/T | 10 x w/T |
| BIC Value | 7 x w/T | 7 x w/T | 7 x w/T | 7 x w/T | |
| Adherence (10% PREST.) | IS/IEC - Max. | 10% Str-No Crack | 10% Str-No Crack | 10% Str-No Crack | 10% Str-No Crack |
| BIC Value | 15% Str-No Crack | 15% Str-No Crack | 15% Str-No Crack | 15% Str-No Crack | |
| BDV (V) | IS/IEC MIN | 560 | 560 | 2560 | 2560 |
| BIC Value | 800 | 900 | 3200 | 3200 | |
| Range(mm) | Width | 4.0 - 15.0 | 4.0- 15.0 | 4.0 - 15.0 | 4.0- 15.0 |
| Thickness | 2.0- 6.0 | 2.0- 6.0 | 2.0- 6.0 | 2.0- 6.0 | |
| Application | For F class Motors, Transformers, Coils | For H class Motors, Transformers, Coils | For F class Motors, Transformers, Coils | For H class Motors, Transformers, Coils |
Our Enamelled and Fibreglass-Covered Aluminium Winding Wires are ideally used in
| Size (mm) | Tolerance +/- | Double covering Overall Dia. Max | Covering Min. | Resistance 0hm meter at 20 Deg. C |
|---|---|---|---|---|
| mm | mm | mm | mm | Nom. |
| 3.00 | 0.030 | 3.285 | 0.200 | 0.0039457 |
| 3.15 | 0.032 | 3.435 | 0.200 | 0.0035789 |
| 3.35 | 0.034 | 3.690 | 0.200 | 0.0031643 |
| 3.55 | 0.036 | 3.890 | 0.250 | 0.0028178 |
| 4.00 | 0.040 | 4.345 | 0.250 | 0.0022194 |
| 4.50 | 0.045 | 4.845 | 0.250 | 0.0017536 |
| 5.00 | 0.050 | 5.345 | 0.250 | 0.0014204 |
| 5.50 | 0.055 | 5.845 | 0.250 | 0.0011739 |
| 6.00 | 0.060 | 6.345 | 0.250 | 0.0009864 |
| 6.50 | 0.065 | 6.845 | 0.250 | 0.0008405 |
| 7.00 | 0.070 | 7.345 | 0.300 | 0.0007247 |
| 7.50 | 0.075 | 7.845 | 0.300 | 0.0006313 |
| 8.00 | 0.080 | 8.345 | 0.300 | 0.0005549 |
| Width (mm) | Glass Fibre Bare (mm) | Glass Fibre Enamelled (mm) | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Single | Grade G1 | Double | Grade G2 | Single | Grade 2 G1 | Double | Grade 2 G2 | ||
| Over | Upto | Min. | Max. | Min. | Max. | Min. | Max. | Min. | Max. |
| - | 3.15 | 0.10 | 0.18 | 0.21 | 0.33 | 0.24 | 0.36 | 0.35 | 0.49 |
| 3.15 | 6.30 | 0.12 | 0.20 | 0.23 | 0.37 | 0.26 | 0.38 | 0.38 | 0.52 |
| 6.30 | 12.50 | 0.14 | 0.24 | 0.27 | 0.43 | 0.28 | 0.42 | 0.43 | 0.57 |
| 12.50 | 16.00 | 0.17 | 0.29 | 0.31 | 0.47 | 0.30 | 0.46 | 0.46 | 0.62 |
