Sizing
Transformer Sizing Guide
By Ziyao Engineering Team2026-04-258 min
Transformer Sizing Guide
Proper transformer sizing ensures reliable operation, energy efficiency, and adequate capacity for future growth.
Sizing Steps
- Step 1: Calculate total connected load (kW)
- Step 2: Apply diversity factor (0.7-0.9)
- Step 3: Convert to kVA using power factor
- Step 4: Add 20-25% future expansion margin
- Step 5: Select next standard kVA rating
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