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Requirements may call for a Transformer of a higher than standard efficiency level
Applies to Ventilated Transformers by SquareD/Schneider Electric
CSL-3 is a Proposed Ruling of efficiencies which is sometimes used as a specification
Two lines of ventilated Transformers (one with 15% and one with 30%) improved efficiency over TP1 and Energy Act requirements are available. Since the US DOE - Advance Notice of Proposal Ruling (ANOPR)- July 2004 Candidate Standard Levels only cover 25kVA Single Phase, 75kVA Three Phase, and 300kVA Three Phase. (Design Line 6, Design Line 7, and Design Line 8) The Square D offering will fill in efficiency requirements for all kVA and exceed the CSL-3 level in some cases.
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