Complaint
| Features: | ||||
| High permeability - greatly improved transformer accuracy and reduce difference and angular than the difference | ||||
| Light weight, low cost - the price was significantly lower than permalloy, cost-effective | ||||
| Excellent temperature stability - can be -55 - 130 ºC to work long hours | ||||
| Saturation magnetic flux density between silicon steel and Permalloy between - is conducive to reducing the instrument security factor | ||||
| Application areas: | ||||
| Measuring Current Transformer Substation Core (accuracy 0.5-0.01 grade, rated voltage 0.5-500kv) | ||||
| Power transformer is specifically measure current and power transmission lines of special transformers. According to measurement accuracy class requirements, can choose a different soft magnetic materials as core. The higher permeability core, the higher the measurement accuracy. At present the greatest amount of core material is cold-rolled silicon steel, glass and nano-crystalline alloy Mo alloy. In recent years, high-precision level (such as the 0.2, 0.2S class, 0.5S level) of the transformer demand is increasing rapidly. When asked to become more than a small, low-security turns, or the core size due to volume requirements restricted circumstances, the cold-rolled silicon steel sheets often do not meet the required precision. Although the high permeability glassy Mo alloys meet the required precision, but the price higher. The use of nano-crystalline core can not only meet the required accuracy and the price lower than the glassy Mo alloys. | ||||
Core winding:
Cores are annealing in vacuum furnace:
Cores are 100% tested after annealing:
Cores are solidified :
| Electrical property standard: | |||
| The comparetion of Fe-based nanocrystalline core, silicon steel core and permally core | |||
| Bascal parameter | Nano core | Permally core | Silicon steel core |
| saturate induction density(T) | 1.25 | 0.76 | 2.03 |
| initial permeability ( Gs/Oe ) | 40,000 - 80,000 | 50,000 - 80,000 | 1,000 |
| Max permeability ( Gs/Oe ) | >200,000 | >200,000 | 40,000 |
| density (g/cm3 ) | 7.2 | 8.75 | 7.65 |
| curie temperature ( ºC ) | 570 | 400 | 740 |
| ribbon thckness (mm) | 0.025 - 0.035 | 0.15 | 0.3 |
| occupation stack factor | >0.70 | 0.9 | 0.95 |
| Specification(MM): | ||||||||
| Bare core size(in plastic case) | Bare core size(in plastic case) | Bare core size(in metal case) | ||||||
| ID | OD | HT | ID | OD | HT | ID | OD | HT |
| 32 | 50 | 20 | 100 | 120 | 25 | 200 | 240 | 20 |
| 40 | 50 | 20 | 60 | 120 | 30 | 120 | 140 | 25 |
| 40 | 59 | 20 | 70 | 120 | 30 | 100 | 155 | 60 |
| 30 | 60 | 20 | 80 | 120 | 30 | 105 | 165 | 70 |
| 40 | 64 | 20 | 90 | 125 | 25 | 120 | 175 | 15 |
| 40 | 64 | 25 | 90 | 130 | 30 | 130 | 190 | 60 |
| 40 | 64 | 30 | 80 | 130 | 50 | 130 | 190 | 40 |
| 50 | 65 | 25 | 90 | 130 | 50 | 160 | 200 | 20 |
| 39 | 68 | 25 | 100 | 140 | 20 | 160 | 205 | 30 |
| 61 | 70 | 20 | 100 | 140 | 25 | 135 | 210 | 30 |
| 40 | 70 | 25 | 100 | 140 | 40 | 150 | 210 | 10 |
| 40 | 70 | 25 | 120 | 170 | 25 | 210 | 280 | 25 |
| 36 | 71 | 30 | 198 | 248 | 20 | 330 | 390 | 15 |
| 36 | 72 | 30 | 198 | 248 | 30 | 330 | 390 | 25 |
| 50 | 75 | 25 | 214 | 264 | 30 | 330 | 390 | 25 |
| 45 | 78 | 30 | 200 | 270 | 30 | 330 | 430 | 15 |
| 50 | 80 | 25 | 90 | 100 | 30 | 330 | 430 | 20 |
| 50 | 80 | 25 | 80 | 110 | 25 | 270 | 330 | 20 |
| 50 | 90 | 30 | 80 | 120 | 20 | 270 | 330 | 25 |
| 50 | 100 | 25 | 80 | 120 | 25 | 270 | 330 | 15 |
| Rmarks:Other core sizes can be ordered according to customers'requirement | ||||||||
Cores are wrapped by firber glass and insulation film:
