In a delta connected load, which of the following is true for line voltage (Vl) and phase voltage (Vp)?

• A. Vl = 2Vp
• B. Vl = Vp
• C. Vl = √3 x Vp
• D. Vl = Vp/√3

Answer: (B)

In a delta-connected load, the relationship between line voltage (Vl) and phase voltage (Vp) is defined by the fact that the line voltage is equal to the phase voltage. This means that each phase winding experiences the full line voltage across it. In a delta configuration, the line voltage is the same as the phase voltage because each phase is directly connected across the line.

This relationship is derived from the geometry of the delta configuration. Each phase forms a closed loop, and the voltage measured across the terminals of each phase winding is the same as the voltage between the corresponding lines.

Understanding this relationship is crucial for properly analyzing and designing three-phase systems, ensuring that voltages and currents are correctly calculated and balanced across the different phases.