An yi amfani da ƙarfe mai ƙarfe mai nickel, wanda ke da ƙarancin juriya ga wutar lantarki, yana da kyakkyawan juriya ga zafi da kuma juriya ga tsatsa, yana da sauƙin sarrafawa da kuma haɗa gubar. Ana amfani da shi don yin muhimman abubuwan da ke cikin relay ɗin zafi mai yawa, mai karya da'irar zafi mai ƙarancin juriya, da kayan lantarki. Hakanan muhimmin abu ne don kebul na dumama wutar lantarki.
Babban maki da kaddarorin
| Nau'i | juriyar lantarki (20 digiriΩ) mm²/m) | ma'aunin juriya na zafin jiki (10^6/digiri) | Dazuzzuka ity g/mm² | Matsakaicin zafin jiki (°c) | Wurin narkewa (°c) |
| CuNi1 | 0.03 | <1000 | 8.9 | 200 | 1085 |
| CuNi2 | 0.05 | <1200 | 8.9 | 200 | 1090 |
| CuNi6 | 0.10 | <600 | 8.9 | 220 | 1095 |
| CuNi8 | 0.12 | <570 | 8.9 | 250 | 1097 |
| CuNi10 | 0.15 | <500 | 8.9 | 250 | 1100 |
| CuNi14 | 0.20 | <380 | 8.9 | 300 | 1115 |
| CuNi19 | 0.25 | <250 | 8.9 | 300 | 1135 |
| CuNi23 | 0.30 | <160 | 8.9 | 300 | 1150 |
| CuNi30 | 0.35 | <100 | 8.9 | 350 | 1170 |
| CuNi34 | 0.40 | -0 | 8.9 | 350 | 1180 |
| CuNi40 | 0.48 | ±40 | 8.9 | 400 | 1280 |
| CuNi44 | 0.49 | <-6 | 8.9 | 400 | 1280 |
Amfani da waya mai ƙarfe nickel:
1. kayan dumama
2. juriyar da ke iyakance yawan zafin jiki na relay
3. mai karya da'irar ƙarancin ƙarfin lantarki
4. na'urar ƙarancin wutar lantarki
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