DE840568C - Auxiliary converter for transmission ratio meter for power transformers - Google Patents

Auxiliary converter for transmission ratio meter for power transformers

Info

Publication number
DE840568C
DE840568C DEH293A DEH0000293A DE840568C DE 840568 C DE840568 C DE 840568C DE H293 A DEH293 A DE H293A DE H0000293 A DEH0000293 A DE H0000293A DE 840568 C DE840568 C DE 840568C
Authority
DE
Germany
Prior art keywords
auxiliary converter
transmission ratio
power transformers
ratio meter
converter
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
DEH293A
Other languages
German (de)
Inventor
Alex Dr-Ing Keller
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.)
ABB Training Center GmbH and Co KG
Original Assignee
Hartmann and Braun 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 Hartmann and Braun AG filed Critical Hartmann and Braun AG
Priority to DEH293A priority Critical patent/DE840568C/en
Application granted granted Critical
Publication of DE840568C publication Critical patent/DE840568C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/28Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Ac-Ac Conversion (AREA)

Description

Das Patent 684 052 betrifft eine Einrichtung zur Bestimmung des Übersetzungsverhältnisses von Leistungstransformatoren bis zu den höchsten üblichen Nennspannungen mit Niederspannung in einer Kompensationsschaltung. Bei den Übersetzungsverhältnismessern nach dem Hauptpatent erfolgt die E(ompensation durch Vergleich der Spannungen zwischen dem Abgriff des parallel zu der Hochspannungsseite des zu untersuchenden Transformators gelegten Spannungsteilers und der Sekundärwicklung eines an die Niederspannungswicklung angeschlossenen Hilfswandlers mit veränderlichem Übersetzungsverhältnis. Die wesentlichsten Bestandteile dieses Obersetzungsverhältnismessers sind der Ohmsche Spannungsteiler, das Nullinstrument und der Hilfswandler. Die Erfindung befaßt sich mit dem Hilfswandler. Infolge der vielen Anforderungen, welche an diesen Hilfswandler gestellt werden (vernachlässigbar kleiner Eigenverbrauch bei höchster Genauigkeit und einer großen Anzahl von Übersetzungsverhältnissen), stellt er den wertvollsten Teil der Einrichtung dar und bestimmt im wesentlichen mit ihren Preis. Seine Vereinfachung ist daher v<)n ausschlaggebender Bedeutung. The 684,052 patent relates to a device for determining the gear ratio from power transformers to the highest common nominal voltages with low voltage in a compensation circuit. With the transmission ratio meters according to The main patent is compensated by comparing the tensions between the Tapping of the parallel to the high-voltage side of the transformer to be examined connected voltage divider and the secondary winding one to the low-voltage winding connected auxiliary converter with variable transmission ratio. The most essential Components of this transmission ratio meter are the ohmic voltage divider, the zero instrument and the auxiliary converter. The invention is concerned with the auxiliary converter. As a result of the many requirements that are placed on this auxiliary converter (negligibly small own consumption with the highest accuracy and a large one Number of gear ratios), it represents the most valuable part of the facility and essentially determines its price. Its simplification is therefore v <) n crucial importance.

Da die Hilfswandler als stoßfugenfreie Wandler ausgeführt werden müssen, sind die Kosten für die Aufbringung der Wicklungen das Ausschlaggebende. Eine wesentliche Vereinfachung wird erzielt, wenn man gemäß der vorliegenden Erfindung den Wandler in Sparschaltung ausführt. Es entfällt dann die Sekundärwicklung, die z. B. in der Praxis ein Drittel der Gesamtwicklung eines Wandlers in der bisherigen Ausführungsform mit zwei Wicklungen ausmacht. Ein weiterer damit verbundener Vorteil ist die Verringerung des Eigenverbrauchs des Hilfswandlers und damit eine Verkleinerung der Belastung des Prüflings bei der Prüfung seines Leerlaufübersetzungsverhältnisses. Because the auxiliary converters are designed as butt joint-free converters the cost of applying the windings is crucial. A substantial simplification is achieved when following the present invention carries out the converter in economy circuit. The secondary winding is then omitted z. B. in practice a third of the total winding of a converter in the previous one Embodiment with two windings makes up. Another related benefit is the reduction of the self-consumption of the auxiliary converter and thus a reduction in size the load on the test object when testing its idle gear ratio.

In der Abbildung ist der Anschluß eines derartigen Hilfswandlers dargestellt. I ist der Spannungsteiler, 2 das Meßinstrument und 3 der Hilfswandler, der, wie dargestellt, als Spartransformator mit entsprechenden Abgriffen ausgebildet ist. The illustration shows the connection of such an auxiliary converter shown. I is the voltage divider, 2 the measuring instrument and 3 the auxiliary converter, which, as shown, is designed as an autotransformer with appropriate taps is.

Claims (1)

PATENTANSPRUC H: Hilfswandler für Ühersetzungsverhältnismesser nach Patent 684 052, dadurch gekennzeichnet, daß er als Spartransformator ausgebildet ist. PATENT CLAIM H: Auxiliary converter for transmission ratio meter according to Patent 684 052, characterized in that it is designed as an autotransformer is.
DEH293A 1949-10-29 1949-10-29 Auxiliary converter for transmission ratio meter for power transformers Expired DE840568C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH293A DE840568C (en) 1949-10-29 1949-10-29 Auxiliary converter for transmission ratio meter for power transformers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH293A DE840568C (en) 1949-10-29 1949-10-29 Auxiliary converter for transmission ratio meter for power transformers

Publications (1)

Publication Number Publication Date
DE840568C true DE840568C (en) 1952-06-03

Family

ID=7142085

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH293A Expired DE840568C (en) 1949-10-29 1949-10-29 Auxiliary converter for transmission ratio meter for power transformers

Country Status (1)

Country Link
DE (1) DE840568C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4525665A (en) * 1982-08-06 1985-06-25 Smalley Daniel S Induction furnace monitor
US4612498A (en) * 1982-08-06 1986-09-16 Smalley Daniel S Induction furnace fault locator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4525665A (en) * 1982-08-06 1985-06-25 Smalley Daniel S Induction furnace monitor
US4612498A (en) * 1982-08-06 1986-09-16 Smalley Daniel S Induction furnace fault locator

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