![]() On May of 2010 The NEMA CSL-3 standards were introduced with higher efficiency ratings than NEMA TP-1. The standards for transformers manufactured on or after Januare known as NEMA TP-1 (or Energy Star labeled). The table below lists the minimum efficiencies of low-voltage dry-type three phase distribution transformers required for their kVA rating. This includes units stored at manufacturers’ warehouses, distributor stock, job sites, etc.Ĭomparison of various efficiency standards: NEMA TP-1, NEMA PREMIUM CSL-3 & DOE 2016 can continue to be legally sold and installed after January 1, 2016. (NEMA TP-1) that are physically in the U.S. Transformers that meet the current efficiency requirements in the U.S. This ruling applies to three phase low voltage dry-type general purpose distribution transformers manufactured starting on January 1, 2016. MGM Transformer Company is at the forefront of this new standard and will be offering the new efficiencies on its products starting on January 1, 2016. Beginning in 2016, there will be newly amended, federally mandated, energy efficiency standards for distribution transformers. The Department of Energy (DOE) has regulated the energy efficiency level of low-voltage dry-type distribution transformers since 2007. A distribution transformer provides the final voltage transformation in the electric power distribution system by reducing the high voltage current from a power line to a lower voltage for use in a building.
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