Ngwunye HRC dị ala nke NT dị obere n'ibu, obere nha, obere ike, mfu na oke ike gbajiri agbaji. A na-eji ngwaahịa a eme ihe nke ukwuu n'ihe gbasara oke ibu na nchekwa sekit dị mkpụmkpụ nke nrụnye eletriki.
Ngwaahịa a kwekọrọ na ọkọlọtọ IEC 269 yana ọkwa niile dị na ọkwa dị elu n'ụwa.
Njikọ fiusi ụlọ ọrụ mmepụta ihe maka ọtụtụ ngwa dị iche iche.
mbukota site na katọn mbupụ ọkọlọtọ, ma ọ bụ dịka arịrịọ onye ahịa si dị
| Nha | Voltaji e nyere ọkwa (V) | Egosipụtara ugbu a (A) | Ibu (g) |
| NH00C | AC500/690V DC 440V | 2,4,6,10,16,20,25,32,35,40,50,63,80,100 | 145 |
| NH00 | AC500/690V DC 440V | 2,4,6,10,16,20,25,32,40,50,63,80,100,125,160 | 180 |
| NH0 | AC500/690V DC 440V | 4,6,10,16,20,25,32,40,50,63,80,100,125,160 | 250 |
| NH1 | AC500/690V DC 440V | 63,80,100,125,160,200,224,250 | 460 |
| NH2 | AC500/690V DC 440V | 80,100,125,160,200,224,250,300,315,355,400 | 680 |
| NH3 | AC500/690V DC 440V | 300,315,355,400,425,500,630 | 900 |
| NH4 | AC500/690V DC 440V | 630,800,1000,1250 | 2200 |