How many amps does a 45 kva transformer draw?
Three-phase transformer current calculations The full load current I(A) in amps is equal to 1000 times of transformer rating S(kVA) in kVA divided by the multiplication of root 3 times of line to line voltage V(V) in volts. V(S-V) = Secondary voltage in volts.
1 kVA is equal to 1,000 volt-amps and are most commonly used for measuring apparent power in generators and transformers….How many amps is 15kva?
What size breaker do I need for a 45 kva transformer?
For a 45kVA transformer, the primary current would be 45,000VA÷(480×1.732)=54A. For the same transformer, the secondary current would be 45,000VA÷(208V×1.732)=125A.
Three Phase Transformer