RCCB
Some of the standards current ratings and material permeability as below:
| Sr. No. | Leakage current ratings | Initial Permeability(k) | Max. Permeability(k) |
|---|---|---|---|
| 1 | 10-30mA | 100 - 180 | 350 - 500 |
| 2 | 100mA | 80 - 150 | 190 - 350 |
| 3 | 300mA | 70 - 110 | 100 - 160 |
| 4 | 500mA | 50 - 70 | 80 - 100 |
The raw material used for RCCB Core is nanocrystalline ribbon. General material characteristic as below:
| BASIC PARAMETER | NANO CORE |
|---|---|
| Saturation Flux Density (T) | 1.25 |
| Initial Permeability | 50,000 – 180,000 |
| Maximum Permeability | 80,000 - 500,000 |
| Density (g/cm2) | 7.25 |
| Curie Temperature | 570 |
| Ribbon Thickness (mm) | 0.025-0.030 |
| Occupation Stack factor | 0.8 |
Hysteresis Magnetizing Loop :
Advantage of Nanocrystalline over other common material:
- High permeability - increase inductance and reducing winding turns
- High saturation induction – minimizing size of component
- High curie temperature
- Low coercivity
- Low core loss
- Excellent thermal stability
Application area for RCCB Core:
- Electronic RCCB
- Electromagnetic RCCB
| Bare Core Size | Finish Casing Size |
|---|---|
| ID x OD x Ht | ID x OD x Ht |
| 13 x 17.8 x 5 mm | 11.60 x 19.60 x 6.55 mm |
| 14 x 20 x 10 mm | 12.10 x 22.60 x 11.75 mm |
| 16 x 26 x 10 mm | 14.10 x 28.30 x 12.70 mm |
| 20 x 30 x 15 mm | 17.80 x 33.50 x 17.85 mm |
| 10 x 15 x 20 mm | 8.25 x 18.20 x 22.35 mm |
| 13 x 21.5 x 18 mm | 11.55 x 24.65 x 21.30 mm |
| 13.8 x 20 x 12 mm | 11.65 x 24.15 x 15.40 mm |
| 17 x 24.5 x 20 mm | 15.70 x 28.20 x 22 mm |
| 11.5 x 18 x 20 mm | 9.70 x 23.50 x 22.50 mm |
| 12 x 24 x 25 mm | 9.80 x 26.70 x 27.80 mm |
| 9 x 15 x 20 mm | 7 x 17.50 x 24 mm |
| 12 x 23.5 x 22 mm | 10 x 25.5 x 24.3 mm |
| 8.8 x 11.7 x 20 mm | 6.9 x 13.8 x 22.3 mm |