एक पावर सिस्टम में सममित दोष (Symmetrical faults) वे दोष होते हैं जिनमें कितने चरण (phases) शामिल होते हैं?

The average demand of a power plant is calculated as:

What primary action occurs during load shedding in a power system?

Which of the following is classified as a symmetrical fault in power systems?