DE509063C - Highly sensitive electrical measuring arrangement - Google Patents

Highly sensitive electrical measuring arrangement

Info

Publication number
DE509063C
DE509063C DES83492D DES0083492D DE509063C DE 509063 C DE509063 C DE 509063C DE S83492 D DES83492 D DE S83492D DE S0083492 D DES0083492 D DE S0083492D DE 509063 C DE509063 C DE 509063C
Authority
DE
Germany
Prior art keywords
highly sensitive
measuring arrangement
sensitive electrical
electrical measuring
excitation coil
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
DES83492D
Other languages
German (de)
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
Publication date
Priority to DES83492D priority Critical patent/DE509063C/en
Application granted granted Critical
Publication of DE509063C publication Critical patent/DE509063C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/22—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using conversion of ac into dc

Description

Hochempfindliche elektrische 1VIeßanordnung Im Hauptpatent 503 933 ist eine Meßanordnung für Wechselstrom mittels einer Gleichrichterschaltung mit Membrangleichrichter beschrieben. Diese Schaltung arbeitet im allgemeinen mit empfindlichen Gleichstromgeräten und wird daher von irgendwelchen Fehlerquellen, wie z. B. Kriechströmen, unter Umständen leicht beeinflußt. Dies ist besonders der Fall, wenn zwischen der Erregerspule des Gleichrichters und dem Meßkreis eine höhere Spannungsdifferenz auftritt. Um für solche Fälle die Genauigheit der Messung voll zu wahren, wird gemäß der Erfindung die Erregerspule des Meinbrangleichrichters auf annähernd gleiches Potential wie der Meßkreis gebracht. Dies macht bei einem unter Hochspannung stehenden Meßkreis die Einsetzung eines Isoliertransformators zwischen Erregerspule und Stromquelle erforderlich.Highly sensitive electrical electrical measuring arrangement The main patent 503 933 describes a measuring arrangement for alternating current by means of a rectifier circuit with a membrane rectifier. This circuit generally works with sensitive DC devices and is therefore susceptible to any sources of error, such as e.g. B. leakage currents, may be slightly affected. This is particularly the case when a higher voltage difference occurs between the excitation coil of the rectifier and the measuring circuit. In order to fully maintain the accuracy of the measurement in such cases, according to the invention the excitation coil of the Meinbran rectifier is brought to approximately the same potential as the measuring circuit. If the measuring circuit is under high voltage, this makes it necessary to insert an insulating transformer between the excitation coil and the power source.

Die Figur zeigt ein Ausführungsbeispiel einer Schaltung gemäß der Erfindung. Es ist eine Schaltung zur Messung des Koronav erlustes eines Leiterstückes i. Dieses liegt über der Meßschaltung, bestehend aus den zwei Gleichrichtern 2, 3, Widerstand q. und Galvanometer 5 an einem Pol der Hochspannungswicklung 7 eines Hochspannungswandlers 8, wobei der andere Pol der Hochspannungswicklung 9 geerdet ist. Die Erregerspulen io und i i der beiden Gleichrichter liegen an der Sekundärwicklung 12 eines Isoliertransformators 13, dessen Primärwicklung 14 mit der Stromquelle 15 verbunden ist. Andererseits sind sie bei 6 an die Meßleitung angeschlossen, so daß gegen diese keine größere Potentialdifferenz entstehen kann als der Betrag .der Spannung an einer Erregerspule. Als Stromquelle dient ein Phasenschieber, der benutzt wird, um die von dem Gleichrichter bewirkten Unterbrechungen auf die richtige Phase einzustellen. Falls der Phasentransformator eine für den vorliegenden Zweck genügende Isolation besitzt, kann ein besonderer Isoliertransformator entbehrt werden.The figure shows an embodiment of a circuit according to the invention. It is a circuit for measuring the corona loss of a conductor section i. This is above the measuring circuit, consisting of the two rectifiers 2, 3, resistor q. and galvanometer 5 on one pole of the high-voltage winding 7 of a high-voltage converter 8, the other pole of the high-voltage winding 9 being grounded. The excitation coils io and ii of the two rectifiers are connected to the secondary winding 12 of an insulating transformer 13, the primary winding 14 of which is connected to the current source 15. On the other hand, they are connected to the measuring line at 6, so that against this no greater potential difference can arise than the amount of the voltage on an excitation coil. A phase shifter is used as the current source and is used to set the interruptions caused by the rectifier to the correct phase. If the phase transformer has sufficient isolation for the present purpose, a special isolation transformer can be dispensed with.

Claims (2)

PATENTANSPRÜCHE: i. Hochempfindliche elektrische Meßanordnung für Wechselstrom nach Patent 503 933, dadurch gekennzeichnet, daß zwischen Erregerspule des Membrangleichrichters und Stromquelle ein Isoliertransformator gelegt ist, zum Zwecke, das Potential der Erregerspule dem des Meßkreises annähernd gleichzumachen. PATENT CLAIMS: i. Highly sensitive electrical measuring arrangement for alternating current according to patent 503 933, characterized in that an insulating transformer is placed between the excitation coil of the membrane rectifier and the power source, for the purpose of making the potential of the excitation coil approximately equal to that of the measuring circuit. 2. Anordnung nach Anspruch i, dadurch gekennzeichnet, daß ein zur Regelung der Phase des Erregerstromes dienender Phasenschieber selbst als Isolierwandler dient.2. Arrangement according to claim i, characterized in that one for controlling the phase the phase shifter serving the excitation current itself serves as an isolating converter.
DES83492D Highly sensitive electrical measuring arrangement Expired DE509063C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES83492D DE509063C (en) Highly sensitive electrical measuring arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES83492D DE509063C (en) Highly sensitive electrical measuring arrangement

Publications (1)

Publication Number Publication Date
DE509063C true DE509063C (en) 1930-10-04

Family

ID=7511079

Family Applications (1)

Application Number Title Priority Date Filing Date
DES83492D Expired DE509063C (en) Highly sensitive electrical measuring arrangement

Country Status (1)

Country Link
DE (1) DE509063C (en)

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