Control transformers are used to provide voltage to the control circuits at very high burdens. Control transformers may be three phase or single phase, based on client requirements.
| Reference Standard | IEC, IS or ANSI |
| System Voltage (Um) | 415 V |
| Insulation Level | 0.66/3 kV |
| Rated Primary Voltage | 415 V |
| Rated Secondary Voltage | 415 or 230 V |
| Rated Output | Up to 250 kVA |
| Insulation Class | E or higher |
| Frequency | 50 or 60 Hz |