GB460708A - Improvements relating to portable electric current transformers - Google Patents

Improvements relating to portable electric current transformers

Info

Publication number
GB460708A
GB460708A GB18786/35A GB1878635A GB460708A GB 460708 A GB460708 A GB 460708A GB 18786/35 A GB18786/35 A GB 18786/35A GB 1878635 A GB1878635 A GB 1878635A GB 460708 A GB460708 A GB 460708A
Authority
GB
United Kingdom
Prior art keywords
current
measured
transformer
windings
pair
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
GB18786/35A
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.)
AEG AG
Original Assignee
Allgemeine Elektricitaets Gesellschaft
AEG AG
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 Allgemeine Elektricitaets Gesellschaft, AEG AG filed Critical Allgemeine Elektricitaets Gesellschaft
Publication of GB460708A publication Critical patent/GB460708A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
    • B60Q1/1438—Actuating means for dimming masks or screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/28—Current transformers
    • H01F38/30—Constructions

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

460,708. Current transformers; calibrating meters. ALLGEMEINE ELEKTRICITATS-GES. July 1, 1935, No. 18786. Convention date, June 30, 1934. [Class 38 (ii)] [Also in Group XXXVI] A portable transformer for measuring A.C. or D.C. in straight conductors comprises a pair of annular cores 2, 3 divided so that they may be placed round a conductor 11 carrying the current to be measured, the cores carrying a pair of oppositely connected auxiliary excitation windings 4, 5 and a pair of series-connected secondary windings 7, 8. When D.C. is to be measured, the auxiliary windings 4, 5 are fed with A.C. from an auxiliary source (such as a commutator switching arrangement mounted on the transformer) so as to produce alternating fluxes acting oppositely on the secondaries. The additional effect of the D.C. in the conductor 11 is to produce a resultant alternating flux which produces a voltage at the secondary terminals proportional to the D.C. flowing. When A.C. is to be measured the auxiliary windings 4, 5 are disconnected. The core parts may be hinged together and provided with handles to form tongs. A measuring instrument may be mounted on the transformer. The instrument may be calibrated by comparison with current readings obtained by passing current through an ampere-hour meter for a measured period of time and dividing the meter readings by the time. To facilitate calculation, the number of units of time during which current is allowed to flow is made equal to the transformer ratio, or to a simple fraction or multiple of it.
GB18786/35A 1934-06-30 1935-07-01 Improvements relating to portable electric current transformers Expired GB460708A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE460708X 1934-06-30

Publications (1)

Publication Number Publication Date
GB460708A true GB460708A (en) 1937-02-01

Family

ID=6539776

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18786/35A Expired GB460708A (en) 1934-06-30 1935-07-01 Improvements relating to portable electric current transformers

Country Status (2)

Country Link
FR (1) FR460708A (en)
GB (1) GB460708A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386032A (en) * 1966-04-28 1968-05-28 Franklin Lewis B Removable core structures for electrical devices

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1151475B (en) * 1960-05-06 1963-07-18 Paul Wittstock Anti-glare device for lights, especially for street lights

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386032A (en) * 1966-04-28 1968-05-28 Franklin Lewis B Removable core structures for electrical devices

Also Published As

Publication number Publication date
FR460708A (en) 1913-12-10

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