DOE 2016 is Official and was Effective as of January 1st, 2016.
Department of Energy (DOE) 10 CFR 431 released efficiency standards which took effect January 1, 2016. All Transformers covered by this document manufactured after December 31, 2015 must be compliant with the new standard.
Any Products Manufactured to the TP1 efficiency standards, before January 1st, 2016, can still be sold and installed after January 1, 2016.
For LV Transformers: New efficiency standards apply to Dry-Type Three-Phase Ventilated Transformers, including Harmonic Mitigating Transformers from 15kVA to 1000kVA and XES specialty transformers. The new DOE 2016 standards will surpass and supersede Siemens NEMA TP1 standards and Siemens NEMA Premium Standards (See Comparison).
The change in efficiency ratings may have required changes to the basic construction of many configurations and may have increased the size/ weight of each transformer. Most models will contain higher grade steels and different styles of cores. New cut sheets and mounting data is available in the SpeedFax and DOE 2016 Supplement. See links under the Literature tab.
See FAQ’s document for more information and check back for more documents to be added in the future.
Siemens Medium Voltage (MV) Distribution Transformers are also affected by this standard. These are custom quoted for each application. These quotations will stipulate in the clarifications, the Department of Energy efficiencies being quoted (DOE 2010 or DOE 2016). If your project is expected to ship after January 1, 2016 please let Application Engineering know at time of quote so the proper standard will be quoted.