Demand load
Encyclopedia
In telecommunication
, the term demand load can have the following meanings:
Telecommunication
Telecommunication is the transmission of information over significant distances to communicate. In earlier times, telecommunications involved the use of visual signals, such as beacons, smoke signals, semaphore telegraphs, signal flags, and optical heliographs, or audio messages via coded...
, the term demand load can have the following meanings:
- In general, the total powerElectric powerElectric power is the rate at which electric energy is transferred by an electric circuit. The SI unit of power is the watt.-Circuits:Electric power, like mechanical power, is represented by the letter P in electrical equations...
required by a facility. The demand load is the sum of the operational load (including any tactical load) and nonoperational demand loads. It is determined by applying the proper demand factorDemand factorIn telecommunication, electronics and the electrical power industry, the term demand factor has the following meanings:1. The ratio of the maximum real power consumed by a system to the maximum real power that would be consumed if the entire load connected to the system were to be activated at...
to each of the connected loads and a diversity factorDiversity factorDiversity factor: The probability that a particular piece of equipment will come on at the time of the facility's peak load. It is the ratio of the sum of the individual non-coincident maximum demands of various subdivisions of the system to the maximum demand of the complete system. The diversity...
to the sum total. - At a communications centerCommunications centerIn telecommunication, the term communications center has the following meanings:# An agency charged with the responsibility for handling and controlling communications traffic...
, the power required by all automatic switchingTelephone exchangeIn the field of telecommunications, a telephone exchange or telephone switch is a system of electronic components that connects telephone calls...
, synchronousSynchronizationSynchronization is timekeeping which requires the coordination of events to operate a system in unison. The familiar conductor of an orchestra serves to keep the orchestra in time....
, and terminal equipmentTerminal equipmentIn telecommunication, the term terminal equipment has the following meanings:* Communications equipment at either end of a communications link, used to permit the stations involved to accomplish the mission for which the link was established....
(operated simultaneously on-line or in standbyStandbyStandby may refer to:*Standby , a list in which passengers may request to be placed on to request an earlier or more convenient flight....
), control and keyingKeying (telecommunications)Keying is a family of modulation forms where the modulating signal takes one of two values at all times. The goal of keying is to transmit a digital signal over an analogue channel. The name derives from the Morse code key used for telegraph signaling....
equipment, plus lighting, ventilation, and air- conditioning equipmentConditioning equipmentIn telecommunication, the term conditioning equipment has the following meanings:# At junctions of circuits, equipment used to obtain desired circuit characteristics, such as matched transmission levels, matched impedances, and equalization between facilities.# Corrective networks used to improve...
required to maintain full continuity of communications. - The power required for ventilating equipment, shop lighting, and other support items that may be operated simultaneously with the technical load.
- The sum of the technical demand and nontechnical demand loads of an operating facility.
- At a receiver facility, the powerPower (physics)In physics, power is the rate at which energy is transferred, used, or transformed. For example, the rate at which a light bulb transforms electrical energy into heat and light is measured in watts—the more wattage, the more power, or equivalently the more electrical energy is used per unit...
required for all receivers and auxiliary equipment that may be operated on prime or spare antennas simultaneously, those in standbyStandbyStandby may refer to:*Standby , a list in which passengers may request to be placed on to request an earlier or more convenient flight....
condition, multicouplers, control and keyingKeying (telecommunications)Keying is a family of modulation forms where the modulating signal takes one of two values at all times. The goal of keying is to transmit a digital signal over an analogue channel. The name derives from the Morse code key used for telegraph signaling....
equipment, plus lighting, ventilation, and air conditioningAir conditioningAn air conditioner is a home appliance, system, or mechanism designed to dehumidify and extract heat from an area. The cooling is done using a simple refrigeration cycle...
equipment required for full continuity of communicationsInformation transferIn telecommunications, information transfer is the process of moving messages containing user information from a source to a sink.Note: The information transfer rate may or may not be equal to the transmission modulation rate.-See also:...
. - At a transmitter facility, the power required for all transmitters and auxiliary equipment that may be operated on prime or spare antennas or dummy loads simultaneously, those in standby condition, control and keying equipment, plus lighting, ventilation, and air conditioning equipment required for full continuity of communications.