8.4.4 Low-Voltage Dry-Type Distribution Transformers
Low-voltage dry-type transformers shall comply with the provisions of the Energy Policy Act of 2005, where applicable, as shown in Table 8.4.4. Transformers that are not included in the scope of the Energy Policy Act of 2005 have no performance requirements in this section and are listed for ease of reference as exceptions.
|Single-Phase Transformers||Three-Phase Transformers|
- A low-voltage distribution transformer is a transformer that is air-cooled, does not use oil as a coolant, has an input voltage ≤600 V, and is rated for operation at a frequency of 60 Hz.
- Kilovolt-ampere rating.
- Nominal efficiencies shall be established in accordance with the 10 CFR 431 test procedure for low-voltage dry-type transformers.