The transformer turns ratio (also known as the transformer windings ratio) represents the ratio between the primary and secondary windings of a transformer.
I s = the current flowing through the secondary windings.the current in the secondary windings) is equal to:
Amp to volt ratio full#
V s = the 3 phase voltage at the secondary windingsįor single phase transformers, the secondary full load current (i.e.This is usually given in Amperes (A), but can equivalently be given in kA or MA.įor 3 phase transformers, the secondary full load current (i.e. The secondary full load current is the current flowing through the secondary windings of the transformer. V p = the single-phase voltage at the primary windings.
P = the rated single-phase power of the transformer.I p = the current flowing through the primary windings.the current in the primary windings) is equal to: V p = the 3 phase voltage at the primary windingsįor single phase transformers, the primary full load current (i.e.P = the rated 3 phase power of the transformer.This is usually given in Amperes (A), but can equivalently be given in kA or MA.įor 3 phase transformers, the primary full load current (i.e. The primary full load current is the current flowing through the primary windings of the transformer. This is usually given in kV, but can equivalently be given in V or MV. The secondary transformer voltage is the voltage in the secondary windings of the transformer. The primary transformer voltage is the voltage in the primary windings of the transformer. This is usually given in kVA, but can equally be given in VA or MVA. The transformer rating is the rated power of the transformer. Do not mix the voltage/current on the primary side with the voltage/current on the secondary side. Note that both these formulas apply to both the primary and secondary sides respectively, but not combined. V = the single phase voltage at the windings.P = the rated single phase power of the transformer.I = the current flowing through the windings.V 3ph = the 3 phase voltage at the windingsĪnd single phase transformer current is equal to:.P 3ph = the rated 3 phase power of the transformer.I 3ph = the current flowing through the windings.The formula for both three-phase and single phase transformers is given below. Note that this will affect the resulting calculation, as different equations are used. You can choose from a 3 phase transformer or a single-phase transformer.
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