In a balanced acb sequence, phase a to neutral voltage is Van = 100∠20V. Line-to-line voltage Vac is given by
Right Answer is:
Vac = 100√3 ∠50V
The phase sequence is called a positive sequence or abc sequence when Van leads Vbn by 120° and Vbn leads Vcn by 120°. Line to line voltage Van leads phase voltage Va by 30°.
The phase sequence is called a negative sequence or acb sequence when Van leads Vcn by 120° and Vcn leads Vbn by 120°. The line to line voltage Van lags phase voltage Va by 30°.
For Negative Phase sequence ACB, the line to line voltage Vac is given as
Vac = √3Van∠−150°
Vac = √3(100V∠20°) × (1∠−150°)
Vac = 100√3∠−130°
Vac = 100√3∠50°