Average Load (Electrical)

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Average Load (Electrical)

What is Average Load (Electrical)?

Average Load, The mean electrical demand of a system over a defined time interval used for capacity planning.

Description

The average load is calculated by integrating the instantaneous power draw over a specified period and then dividing by that time, yielding kilowatts (kW). Utilities analyze daily, monthly, and annual average loads to determine the size of transformers and feeders. Designers compare the average to peak demand to determine the load factor. Building automation logs interval data—typically 15 minutes, allowing for energy optimization and demand response participation.

FAQs

  • How is the average load measured?

    Smart meters log kW at fixed intervals for utility analysis.

  • What is load factor?

    Ratio of average load to peak load, indicating usage efficiency.

  • Why is the average load critical?

    It guides transformer and generator capacity decisions.

  • Can the average load reduce tariffs?

    High load factor may qualify for lower demand charges.

  • Who monitors load data?

    Energy managers using building management systems.

  • Does the average load include power factor?

    No, it measures real power; apparent power is separate.

  • How to improve load factor?

    Shift noncritical loads off peak and implement storage solutions.

Fun Fact

Fun Fact: The Empire State Building’s 2011 retrofit raised its load factor from 44 % to 67 %, saving $2.4 million annually in electricity costs.

CSI Code

26 05 00

NAHB Code

2600