In the same open-delta bank, the line voltage equals the coil voltage.

In the same open-delta bank, the line voltage equals the coil voltage.

• A. Ecoil (or winding)
• B. Ecoil × 1.732
• C. Ecoil ÷ 1.732
• D. Ecoil × 0.5

Answer: (A)

In an open-delta bank, the windings are connected directly between two lines, so the voltage across each coil is the line-to-line voltage. There’s no sqrt(3) relationship here, because that factor appears when comparing line-to-line voltage to a coil voltage in a wye connection. The open-delta arrangement uses delta-like connections for the windings, so the coil voltage matches the line voltage. Hence the coil voltage and the line voltage are the same.

In an open-delta bank, the windings are connected directly between two lines, so the voltage across each coil is the line-to-line voltage. There’s no sqrt(3) relationship here, because that factor appears when comparing line-to-line voltage to a coil voltage in a wye connection. The open-delta arrangement uses delta-like connections for the windings, so the coil voltage matches the line voltage. Hence the coil voltage and the line voltage are the same.