Square D EXN-3400-3 400 kVA Energy Efficient Transformer
Square D EXN3400-3 low-voltage dry-type transformer rated 400 kVA at 480V-208/120V for large commercial facilities. Meets DOE TP1 efficiency standards with 150°C rise. HTS 8504.33.0040 for 50-500 kVA classification.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If accessories like enclosures imported separately
Transformer enclosures classify as parts, not complete units.
If measured capacity falls below 50 kVA
Precise power handling determines exact subheading placement.
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Import Tips & Compliance
• NEMA TP2 efficiency test report mandatory for DOE compliance
• Specify BIL (Basic Impulse Level) for overvoltage protection verification
• 400 kVA units need heavy equipment handling instructions
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