In a wye system, what is the relationship between system voltage and coil voltage?

In a wye system, what is the relationship between system voltage and coil voltage?

• A. Coil voltage equals System voltage times 3
• B. System voltage equals coil voltage
• C. Coil voltage multiplied by 1.732 equals System voltage
• D. System voltage divided by 1.732 equals Coil voltage

Answer: (D)

In a wye-connected system, the line (system) voltage is √3 times the phase (coil) voltage. This means the coil voltage is the line-to-neutral voltage, while the system voltage is the line-to-line voltage. Therefore, coil voltage equals system voltage divided by √3, or about system voltage divided by 1.732. The same relationship can also be written as system voltage = √3 × coil voltage, but expressing it as coil voltage = system voltage / √3 matches the form in the answer.

In a wye-connected system, the line (system) voltage is √3 times the phase (coil) voltage. This means the coil voltage is the line-to-neutral voltage, while the system voltage is the line-to-line voltage. Therefore, coil voltage equals system voltage divided by √3, or about system voltage divided by 1.732. The same relationship can also be written as system voltage = √3 × coil voltage, but expressing it as coil voltage = system voltage / √3 matches the form in the answer.