Systema probationis accuratae CTPT societatis nostrae ad probationem erroris (erroris rationis et erroris phasis) CT et PT adhibetur. Mensa haec installari potest: HES-1C Transformator Probator, FY49 CT Onus, FY95 PT Onus.
Totum systema, incluso banco probationum CT/PT HES-30, calibratore transformatoris HES-1C, onere CT FY47-49, CT ordinario HLS-60G2 (cum generatore currentis), onere PT FY95 et PT ordinario HJS-33G3 (cum generatore tensionis).
Spatium Probationis:
| Mensura Item | Spatium Probationis | |
| Examen accuratiae CT | Ambitus currentis primarii aestimati: | 5A-6300A |
| Currens secundarius aestimatus: | 5A et 1A | |
| Spatium operationis: | (1%-120%). In | |
| Examen accuratiae PT | Tensio primaria aestimata (kV): | 6.3(6.3/√3), 11(11/√3), 33(33/√3)kV |
| Tensio secundaria aestimata: | 100V, 100/√3V, 110V, 110/√3V | |
| Spatium operationis: | (20%-120%). Et | |
Classis accuratae mensurae apparatus:
| Descriptio Producti | Exemplar Producti | Classis Accurationis |
| CT Ordinarius (cum Fonte Currentis) | HLS-60G2 | ±0.02S% |
| PT Ordinarium (cum Fonte Tensionis) | HJS-33G2 | ±0.02% |
| Onus CT | Annus fiscalis 47-49 | ±3% |
| PT Onus | Annus Fiscalis 95 | ±3% |
| Probator Transformatoris (Calibrator) | HES-1C | ±2% |