# Electrical Power Engineering Formula Cheat Sheet

The Electrical Power formulas sheet provides different electrical formulas that are useful for the Power Electrical Engineers.

Load factor is defined as the ratio between average load and maximum demand. It is also defined as the ratio between generated units and the maximum demand.

*Example # 1: A hydroelectric power station has a maximum demand of 40 MW and an average demand of 10 MW. Find the load factor at the station.*

Solution: Load factor = Average load / Maximum demand = 10 MW / 40 MW = 25%.

### Average Load

Average load or average demand is the average of loads or generated units for the specific period of time.

Daily average load: It is defined as

**units generated in a day / 24 hours**Monthly average load: It is defined as

**units generated in a month / number of hours in a month**Yearly average load: It is defined as

**units generated in a year / number of hours in year****Diversity factor**

Diversity factor is defined as sum of individual maximum demands to the maximum demand of the whole power station.