IEEE 100
`The Authoritative Dictionary of
`IEEE Standards Terms
`
`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 TIis not
`used for equipment). See also: thermal endurance graph.
`(ED 1-1986r
`(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
`90-104
`90
`105—129
`105
`130-154
`130
`155-179
`155
`180-199
`180
`200-219
`200
`For 220 and above, no preferred indices established.
`
`(EB 98-1984r
`See alse: thermal endurance graph.
`temperature inversion(in the troposphere} An increase of tem-
`perature with height in the troposphere.
`(AP/PROP) 211-1997
`temperature meter Sec: electric thermometer.
`temperature, operating See: operating temperature.
`temperature radiator (illuminating engineering) An ideal ra-
`diator whose radiant flux density (radiant exitance) is deter-
`mined by its temperature and the material and characterof its
`surface, and is independentof its previous history.
`(EECAIE) [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.
`(IA} [62]
`temperature relay A relay whose operation is caused by spec-
`ified external temperature. See also: thermal relay.
`(SWG/PE) C37,100-1992
`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: thermalrelay.
`(SWG/PE/PSR) C37.90-1978s, C37.100-198 1s
`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/FR) C57.134-2000
`(2) The difference between the temperature of the part under
`consideration and the ambient temperature.
`(PE/EM/TR) 67-1990r, CS7.12,.80-E978r
`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, Nore: The test quantities
`may be current, load, etc. See aise: allowable continuous
`current.
`(SWG/PE) C37.40-1981s, C37.100-1992
`(2) A test in which rated current at rated frequency is applied
`to equipmentto determine its temperature rise.
`(SWG/PE/SWG-OLD} [9], C37.34-1971s, [56]
`temperature sensor (sensing element) A device that responds
`to temperature and provides an electrical signal or mechanical
`operation.
`GA/BT/AV/PC) 515-1997, 152-1953s, 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.
`(AES) [41]
`
`temperature, wet bulb See; wet bulb temperature.
`tempest The investigalion, study, and control of spurious elec-
`tromagnetic signals emitted by electronic equipment. See
`alsa: emanations security.
`(C/BA) 896.3-1993w
`template An asset with parameters or slots that can be used to
`construct an instantiated asset. See afso: construction.
`(CSE) 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 afsa: im-
`age matching. (B) A pattern recognition technique using the
`principle described in definition (A),
`(C) 640,4-1990
`temporal coherence (3) (laser maser) {electromagnetic} The
`correlation in time of electromagnetic fields at a point in
`space,
`{LEQ) 586-1980w
`(2) (fiber optics) See a/so: coherent.
`812-1984
`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 alf of a program’s initialization tasks. Cenirast: coinci-
`dental cohesion; fegical 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 iocations over short time intervals.
`(C/BA} 10857-1994
`temporally coherent radiation See; coherent,
`temporally weighted terminal coupling toss (TCL) The ter-
`minal coupling loss, weighted in both time and frequency
`domains to account for subjective perception.
`{COM/TA) 1329-1999
`temporal noise (diode-type camera tube) The varying ampli-
`tude portion of what should be a fixed amplitude video signal.
`It is statistical in nature, being random in both time and am-
`plitude,
`(ED) 503-1978w
`temporary Intermittent or transient.
`(C/BA) 896.3-1993w
`temporary emergency circuits Circuits arranged for instanta-
`heaus automatic transferto a storage-battery supply upon fail-
`ure of a ship’s service supply. See aiso: emergency electric
`system.
`(EEC/PE/MTP) {1193
`temperary emergency lighting The lighting ofexits 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. See also: emergency electric system.
`{EEC/PE/MT) [119]
`femporary faulé One that may be self-clearing, or may be
`cleared if the faulted circuit is rapidly de-energized by open-
`ing of a protective device, such as a circuit breakeror recloser.
`(T&DYPE) 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)} 859-1987w
`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)
`[8]
`temporary interruption (1} 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 fost. 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 deg-
`radation of service and can cause delay in dial tone or inef-
`fective attempts.
`(COM/TA) 973-1990w
`(2) A type of short duration variation. The complete ioss of
`voltage (<0, pu) on one or more phase conductors for a time
`period between 3 5 and | min.
`(SCC22) 1346-1998
`
`