Are there any transformers exempt from this legislation?
As defined by DOE 10 CFR 431.192 a Distribution transformer means a transformer that—
- Has an input voltage of 34.5 kV or less;
- Has an output voltage of 600 V or less;
- Is rated for operation at a frequency of 60 Hz; and
- Has a capacity of 10 kVA to 2500 kVA for liquid-immersed units and 15 kVA to 2500 kVA for dry-type units.
These are the transformers subjected to the DOE 2016 requirements.
Exceptions are defined by the same DOE 10 CFR 431.192.(5):
- The term “distribution transformer” does not include a transformer that is an:
- Drive (isolation) transformer;
- Grounding transformer;
- Machine-tool (control) transformer;
- Non-ventilated transformer;
- Rectifier transformer;
- Regulating transformer;
- Sealed transformer;
- Special-impedance transformer;
- Testing transformer;
- Transformer with tap range of 20 percent or more;
- Uninterruptible power supply transformer; or
- Welding transformer.
Drive (isolation) transformer means a transformer that:
- Isolates an electric motor from the line;
- Accommodates the added loads of drive-created harmonics; and
- Is designed to withstand the additional mechanical stresses resulting from an alternating current adjustable frequency motor drive or a direct current motor drive.