What is the formula for calculating the EP in a 3P WYE Transformer?

The correct answer rightly identifies the formula for calculating the phase voltage (EP) in a three-phase WYE transformer configuration. In a WYE connection, the relationship between the line voltage and phase voltage is defined by the equation EP = EL / √3, where EL is the line voltage. Since √3 is approximately 1.732, this relationship can be rewritten as EP = EL / 1.732.

Understanding this relationship is crucial, as it helps in determining the voltage across each phase winding in a three-phase system, which is essential for various electrical calculations and transformer operations. In practice, this formula is vital for engineers and technicians working with three-phase transformers, ensuring they can accurately manage voltage levels throughout the system.

The other options provided do use various transformer operational parameters, but they do not specifically address the calculation of phase voltage in a WYE configuration. Some may relate to power calculations, but they do not apply to the direct relationship between line voltage and phase voltage as required in this context.