HOW TO SIZE A TRANSFORMER
- Transformers are sized by determining the total load required (in amps).
- Transformer capacity is rated in KVA (kilo-volt-amperes).
- The load voltage and load amps must be known to calculate KVA rating.
- * NOTE: We do not recommend loading a transformer above 80% of its KVA rating. When the KVA rating has been calculated, divide that number by 0.8 to get the minimum KVA rating needed. All values should be reviewed and confirmed by an electrician or electrical engineer.
FORMULAS USED IN CALCULATOR:
1-Phase KVA = Volts x Amps / 1000
1-Phase Amps = KVA / Volts x 1000
3-Phase KVA = Volts x Amps x 1.732 / 1000
3-Phase Amps = KVA / Volts / 1.732 x 1000