IEEE 100
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`The Authoritative Dictionary of
`IEEE Standards Terms
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`Seventh Edition
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`

`temperature inversion
`
`1161
`
`temporary interruption
`
`(2.) (thermal classification of electric equipment and elec-
`trical insulation) (evaluation of thermal capability) The num-
`ber that corresponds to the temperature in "C. derived math-
`ematically or graphically from the thermal endurance
`relationship at a specified time (often 20 000 h). The temper-
`ature index (TI) may be reported for materials and insulation
`systems. However, for insulation systems it may be preferable
`to make comparisons at a particular temperature, for example,
`130°C, 155 “C, or over a range of temperatures. (The TI is not
`used for equipment). See also: thermal endurance graph.
`(E1) 1-1986:-
`(3) {solid electrical insulating materials) This is the number
`corresponding to the temperature in degrees Celsius derived
`from the thermal endurance graph at a given time.
`
` Number Range Preferred Temperature Index
`90a104
`90
`[057129
`105
`[row [54
`130
`[55 ~— 179
`155
`EBO— 199
`180
`200—219
`200
`For 220 and above, no preferred indices established.
`
`(El) 98-I9B4r
`See also: thermal endurance graph.
`temperature inversion (in the troposphere) An increase of tem-
`perature with height in the troposphere.
`(AP/PROP) 21 l- l 997
`temperature meter Sec: electric thermometer.
`temperature, operating See: operating temperature.
`temperature radiator (illuminating engineering) An ideal ra-
`diator whose radiant flux density (radiant exitauce) is deter-
`mined by its temperature and the material and character of its
`surface, and is independent of its previous history.
`(EEC/3E) [126]
`temperature-regulating equipment (rectifier) Any equipment
`used for heating and cooling a rectifier, together with the de-
`vices for controlling and indicating its temperature. See also:
`rectification.
`(1A)
`[62]
`temperature relay A relay whose operation is caused by spec-
`ified external temperature. See also .- thermal relay.
`(SWGIPE) C37.100-l992
`temperature relays (gas turbines) Devices by means of which
`the output signals of the temperature detectors are enabled to
`control directly or indirectly the rate of fuel energy input, the
`air flow input, or both, to the combustion system. Note: Op-
`eration of a temperature relay is caused by a specified external
`temperature: whereas operation of a thermal relay is caused
`by the heating of a part of the relay. See also: thermal relay.
`(SWG/l’EfPSR) C37.90—1978s, C37.10tl—i981s
`temperature rise (1) The difference between the temperature
`of the part under consideration {commonly the average wind-
`ing rise or the maximum (hottest-spot) winding temperature
`rise] and the ambient temperature.
`(PE/TR) C57.l34—2000
`(2.) The difference between the temperature of the part under
`consideration and the ambient temperature.
`(PE/EMITR) 67~1990r, C57.iZ.80rl978r
`temperature-rise tests (1) Tests to determine the temperature
`rise, above ambient, of various parts of the tested device when
`subjected to specified test quantities. Note: The test quantities
`may be current, load, etc. See also: allowable continuous
`current.
`(SWGIPE) C37.4G-1981s, C37.lUO—1992
`(2) A test in which rated current at rated frequency is applied
`to equipment to determine its temperature rise.
`{56]
`(SWGfPE/SWGOLD) [9], €37.34Hl97ls,
`temperature sensor (sensing element) A device that responds
`to temperature and provides an electrical signal or mechanical
`operation.
`(iA/BT/AVIPC) 5154997, 152ml953s. 515.1—1995
`temperature stability (electrical conversion) Static regulation
`caused by a shift or change in output that was caused by
`temperature variation. This effect may be produced by a
`change in the ambient or by self-heating.
`(ABS) [41]
`
`temperature, wet bulb See: wet bulb temperature
`tempest The investigation, study, and control of spurious elec-
`tromagnetic signals emitted by electronic equipment. See
`also: emanations security.
`(CIBA) 396.3—1993w
`template An asset with parameters or slots that can be used to
`construct an instantiated asset. Sec also: construction.
`(C/SE) 1517-1999
`template matching (A) An image processing technique in
`which patterns or shapes are detected by comparison with
`prespecified patterns or shapes called templates. See also: im-
`age matching. (B) A pattern recognition technique using the
`principle described in definition (A).
`(C) 6i0.4—l 990
`temporal coherence (1) (laser maser) (electromagnetic) The
`correlation in time of electromagnetic fields at a point in
`space.
`(LEO) 586-1980w
`(2.) (fiber optics) See also: coherent.
`812-1984w
`temporal cohesion A type of cohesion in which the tasks per—
`formed by a software module are all required at a particular
`phase of program execution: for example, a module contain—
`ing all of a program’s initialization tasks. Contrast: coinci-
`dental cohesion: logical cohesion; sequential cohesion; pro-
`cedural cohesion;
`functional cohesion; communicational
`cohesion.
`(C) 610.12-1990
`temporal locality The tendency for a program to reference the
`same memory locations over short time intervals.
`(CIBA) 10857-1994
`temporally coherent radiation Sec: coherent.
`temporally weighted terminal coupling loss (TCLT) The ter-
`minal coupling loss. weighted in both time and frequency
`domains to account for subjective perception.
`(COM/TA) 1329-1999
`temporal noise (diodc~type camera tube) The varying ampli-
`tude portion of what should be afixed amplitude video signal.
`It is statistical in nature, being random in both time and am—
`plitude,
`(ED) 503-]978w
`temporary intermittent or transient.
`(C/BA) 896.3—1993w
`temporary emergency circuits Circuits arranged for instanta-
`neous automatic transfer to a storage-battery supply upon fail-
`ure of a ship’s service supply. See also: emergency electric
`system.
`(EEC/PE/M'i‘) {i193
`temporary emergency lighting The lighting of exits and pas-
`sages to permit passengers and crew, upon failure of a ship's
`service lighting, readily to find their way to the lifeboat em-
`barkation deck. Scc also: emergency electric system.
`(EEC/PElMT) [l 19]
`temporary fault One that may be self-clearing, or may be
`cleared if the faulted circuit is rapidly tie—energized by open-
`ing of a protective device. such as a circuit breaker or recioser.
`(T&D/PE) 1250-1995
`temporary forced outage A forced outage where the unit or
`component is undamaged and is restored to service by manual
`switching operations without repair but possibly with on—site
`inspection.
`(PE/PSE) 859w1987w
`temporary ground A connection between a grounding system
`and parts of an installation that are normally alive. applied
`temporarily so that work may be safely carried out in them.
`(PE)
`[3]
`temporary interruption (l) A short-duration outage that inter-
`feres with call processing but does not affect established con-
`nections. SPCSs may have frequent outages of short duration
`due to system reinitialization. Although established calls may
`remain connected during these outages, new calls may be
`delayed and calls in the dialing state may be lost. Most cus-
`tomers do not perceive these short outages because they are
`not likely to be using their telephones when they occur. How-
`ever, an excessive number of short outages can lead to dog
`radiation of service and can cause delay in dial tone or inef-
`fective attempts.
`(COM/TA) 973-]990w
`(2) A type of short duration variation. The complete loss of
`voltage {(0.1 pu) on one or more phase conductors for a time
`period between 3 s and l min.
`(SCC22) l346—l998
`
`