O la matou kamupani CTPT sa'o su'ega faiga e fa'aaogaina mo le su'ega sese (Ratio error ma Phase error) o le CT&PT, E mafai ona fa'apipi'i le Bench: HES-1C Transformer Tester, FY49 CT Burden, FY95 PT Burden
O le faiga atoa e aofia ai le HES-30 CT/PT Testing Bench, HES-1C Transformer Calibrator, FY47-49 CT Burden, HLS-60G2 Standard CT (fa'atasi ai ma le Current Generator), FY95 PT Burden ma le HJS-33G3 Standard PT (fa'atasi ai ma le Voltage Generator)
Vaega o Su'ega:
| Mea e Fuafua | Vaega o Su'ega | |
| Su'ega sa'o o le CT | Vaega autū o le eletise ua fa'atulagaina: | 5A-6300A |
| Tafe lona lua fa'atulagaina: | 5A ma le 1A | |
| Vaega o galuega: | (1%-120%). I totonu | |
| Su'ega sa'o o le PT | Voltage autū ua fa'atulagaina (kV): | 6.3(6.3/√3), 11(11/√3), 33(33/√3)kV |
| Voltage lona lua fa'atulagaina: | 100V, 100/√3V, 110V, 110/√3V | |
| Vaega o galuega: | (20%-120%). Ma | |
Vasega sa'o o le fua meafaigaluega:
| Fa'amatalaga o le Oloa | Fa'ata'ita'iga o le Oloa | Vasega Sa'o |
| CT Masani (fa'atasi ai ma le Puna o le Taimi Nei) | HLS-60G2 | ±0.02S% |
| PT Masani (fa'atasi ai ma le Puna o le Voltage) | HJS-33G2 | ±0.02% |
| CT Avega | FY47-49 | ±3% |
| PT Burden | FY95 | ±3% |
| Su'ega o le Transformer (Calibrator) | HES-1C | ±2% |