DOE 2016 Energy Efficient Transformers 600 V and Below

10 CFR 431.196: The efficiency of a low-voltage dry-type distribution transformer manufactured on or after January 1, 2016, shall be no less than that required for their kVA rating in the table below. Low-voltage dry-type distribution transformers with kVA ratings not appearing in the table shall have their minimum efficiency level determined by linear interpolation of the kVA and efficiency values immediately above and below that kVA rating. All efficiency values are at thirty-five percent of nameplate-rated load temperature corrected to 75 °C, determined according to the DOE Test Method for Measuring the Energy Consumption of Distribution Transformers under Appendix A to Subpart K of 10 CFR part 431. U.S. Department of Energy Standards and Test Procedures.

The following product offering must comply with the table above:

• Three-phase and single-phase

• Step-up and step-down transformers

• General purpose ventilated transformers (isolation transformers)

• Low temperature rise “Watchdog” general purpose ventilated transformers

• Transformers designed for harmonic applications (K-Rated, data center transformers, etc.)

• General purpose open core and coil transformers

The following low voltage transformers do not need to comply with the table above:

• Auto-transformers

• Drive isolation transformers

• Non-ventilated transformers

• Resin encapsulated transformers

• Buck and boost transformers

• Control transformers (machine tool)

• Medical isolation panel transformers compliance with UL 1047 (Tables 30.1 and 30.2) (SPECIAL IZ — LOW LEAKAGE)

Three-Phase Transformer Offering from Square D — DOE 2016 EX

• Exceed the efficiency levels from 10 CFR 431.196

• Terminals sized to handle wire ranges to match Square D circuit breakers, switches, panelboards, etc. Located to meet NEC bending radius and layout to simplify connections

• IZ Levels to allow for designing with the minimum AIC Panels available

• In-rush current limited to expand the Square D circuit breaker options at both 125 and 250% sizing

• Sound level at 3 dB for all designs, but up to 6–10 dB below on certain units—QUIET QUALITY

• 1/2 in. clearance from the rear and side, UL 1561 alcove testing all enclosures to not exceed 90 °C on adjacent walls

• Product families of the DOE 2016 EX include: General purpose, aluminum and copper windings, 150 °C rise; Low temperature rise, aluminum and cover windings, 115 or 80 °C rise; and K-Rated transformers for harmonic applications