Use Case

When load is balanced across the three phases of a distribution feeder the system is more stable, reliable, and efficient. Unbalance causes voltage fluctuations and potential short and long-term reliability problems. Feeder phase balance is often monitored at the substation, but it’s important to also monitor load at additional points along the feeder to ensure balance throughout all segments of feeder.

Below is an example of a week of load data for an unbalanced segment of a feeder. These same three phases are balanced at the substation, but at the mid-feeder location below phase A (red line) current is significantly lower than phases B (green) and C (blue).