AC voltage is sometimes expressed like 115/200 volts. This means 115VLN a.k.a. 200VLL.
VLN = Line to Neutral Voltage (usually rms)
VLL = Line to Line Voltage (usually rms)
Power Factor (PF) = The ratio of real power in watts (W) to apparent power in volt amps (VA). A resistive load has a power factor of 1. A capacitive load is leading (current leads voltage). An inductive load is lagging (current lags voltage).
Figure 1: Credit Wikipedia
Example: Calculate phase current given VLL and load power. To solve, the voltage is converted to Line to Neutral and the power is split in equal thirds.