In telecommunication, the term demand factor has the following meanings:
1. The ratio of (a) the maximum real power consumed by a system to (b) the maximum real power that would be consumed if the entire load connected to the system were to be activated at the same time.
Note: The maximum real power is usually integrated over a specified time interval, such as 15 or 30 minutes, and is usually expressed in kilowatts. The real power that would be consumed if the entire load connected to the system were to be activated at the same time is obtained by summing the power required by all the connected equipment. This load is expressed in kilowatts if the consumed real power is expressed in kilowatts.
2. The ratio of (a) the maximum power, integrated over a specified time interval, such as 15 or 30 minutes, and usually expressed in kilowatts, consumed by a system, to (b) the maximum volt-amperes, expressed in kilovolt-amperes if the power is expressed in kilowatts, integrated over a time interval of the same duration, though not necessarily during the same interval.
Note: Charges for electrical power may be based on the demand factor as well as the kilowatt-hours of electrical energy consumed.
Knowledge of the maximum demand of groups of loads is of great importance because it is the group maximum demand that determines the sizes of conductors and apparatus throughout the electrical system.
Since the maximum demand is one of the factors determining the size of conductors, it is important that the demandfactor be established as closely as possible.
Knowing the demandfactors for various types of buildings and installations is also beneficial when existing facilities are rearranged because increased serving capacity is often not required, even though the connected load is greatly increased.
Feeds |
Contact