GB320193A - Improvements relating to the measurement of the temperature of electric cables - Google Patents

Improvements relating to the measurement of the temperature of electric cables

Info

Publication number
GB320193A
GB320193A GB2485328A GB2485328A GB320193A GB 320193 A GB320193 A GB 320193A GB 2485328 A GB2485328 A GB 2485328A GB 2485328 A GB2485328 A GB 2485328A GB 320193 A GB320193 A GB 320193A
Authority
GB
United Kingdom
Prior art keywords
cable
temperature
point
sheaths
thermo
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2485328A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Callenders Cable and Construction Co Ltd
Original Assignee
Callenders Cable and Construction Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Callenders Cable and Construction Co Ltd filed Critical Callenders Cable and Construction Co Ltd
Priority to GB2485328A priority Critical patent/GB320193A/en
Publication of GB320193A publication Critical patent/GB320193A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/02—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using thermoelectric elements, e.g. thermocouples
    • G01K7/021—Particular circuit arrangements

Abstract

320,193. Callender's Cable & Construction Co., Ltd., and Brazier, L. G. Aug. 29, 1928. Thermometers.-In order to determine the temperature of a point within an electric cable which is not accessible for direct measurement, a reference length of cable is heated internally at a rate proportional to the heating effect of the load on the actual cable at the point of interest, the temperatures of the exterior surfaces of the two cables are maintained at the same value or in a defined relation to each other, and means are provided for indicating the temperature in the interior of the reference cable at a point corresponding to the point of interest in the real cable. The point A denotes the position at which the core temperature of the cable 1 is to be determined, this, cable having a number ot conductors 2 and a lead sheath 3. The reference cable 4 is preferably a short length of the real cable in which the central strand of each conductor has been replaced by a heating resistance 6. A transformer 7 supplies current to the wires 6 so that the heating effect per unit length of the cable 4 is equal or proportional to that of the current in the cable 1. The hot junctions 8<a>, 9<a> of thermo-couples 8, 9 are attached to the sheaths 3, 5, the cold junctions being mamtained at the same temperature. The two thermocouples are connected in opposition to a controller 17 arranged to switch in a heating device 12 or a cooling device so that the sheaths 3, 5 are maintained at the same temperature. The hot junction 16<a >of a thermo-couple 16 is attached to the wire 6 and this couple is connected to a measuring-instrument 15 which indicates the desired core temperature of the cable 1. Specification 170,728 is referred to.
GB2485328A 1928-08-29 1928-08-29 Improvements relating to the measurement of the temperature of electric cables Expired GB320193A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2485328A GB320193A (en) 1928-08-29 1928-08-29 Improvements relating to the measurement of the temperature of electric cables

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2485328A GB320193A (en) 1928-08-29 1928-08-29 Improvements relating to the measurement of the temperature of electric cables

Publications (1)

Publication Number Publication Date
GB320193A true GB320193A (en) 1929-10-10

Family

ID=10218272

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2485328A Expired GB320193A (en) 1928-08-29 1928-08-29 Improvements relating to the measurement of the temperature of electric cables

Country Status (1)

Country Link
GB (1) GB320193A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2741127A (en) * 1952-05-08 1956-04-10 Hydro Electric Power Commissio Temperature indicator
US3117438A (en) * 1961-09-08 1964-01-14 Harden John Charles Differential thermal analysis apparatus
US3289478A (en) * 1964-03-02 1966-12-06 Showa Electric Wire & Cable Co Supervisory system for temperatures of electric cables

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2741127A (en) * 1952-05-08 1956-04-10 Hydro Electric Power Commissio Temperature indicator
US3117438A (en) * 1961-09-08 1964-01-14 Harden John Charles Differential thermal analysis apparatus
US3289478A (en) * 1964-03-02 1966-12-06 Showa Electric Wire & Cable Co Supervisory system for temperatures of electric cables

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