The transformer turns ratio in resistance welding reflects the number of secondary coil turns versus the number of primary coil turns. a) V 1 = 4000 V, V 2 = 400 V, Transformer Rating = 50 kVA = V 1 × I 1 = V 2 × I 2 Primary full-load current, I 1 = (50 × 1000 / 4000) = 12.5 A … Transformer turn ratio K using electromotive forces Faraday's law of ampere-turn balance states that the number of turns in the primary winding times the primary current must equal the number of turns in the secondary winding times the secondary current. The transformer works on the principle of electromagnetic induction. What is the formula for transformer ratio? The primary function of a power transformer is to step up or step down voltage as per the requirement. In a wye transformer, the 3Ø and 1Ø 120V line current equals the phase current (IPhase = ILine This book is intended for a course that combines machinery and power systems into one semester. The primary coil is connected to an AC voltage source. As it is cleared from its name, the turn ratio can be defined as the ratio between the number of turns of secondary winding to the number of turns in the primary winding. These are usually wound with fine-gauge wire and hidden inside the CT housing.
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