- Power and distribution transformers (2)
- Control transformers (1)
- Distribution transformers, electric (3)
- Feeder voltage boosters (electric transformers) (1)
- Line voltage regulators (3)
- Power transformers, electric (4)
- Transmission and distribution voltage regulators (2)
- Voltage regulating transformers, electric power (1)
- Electronic meter transformers (1)
- Lighting transformers, street and airport (1)
- Signaling transformers, electric (1)
