DE685498C - Device for determining the transmission ratio of power transformers - Google Patents

Device for determining the transmission ratio of power transformers

Info

Publication number
DE685498C
DE685498C DEH153877D DEH0153877D DE685498C DE 685498 C DE685498 C DE 685498C DE H153877 D DEH153877 D DE H153877D DE H0153877 D DEH0153877 D DE H0153877D DE 685498 C DE685498 C DE 685498C
Authority
DE
Germany
Prior art keywords
voltage
compensation
auxiliary converter
voltage divider
winding
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
DEH153877D
Other languages
German (de)
Inventor
Dr-Ing Alex 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 DEH153877D priority Critical patent/DE685498C/en
Application granted granted Critical
Publication of DE685498C publication Critical patent/DE685498C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/20Measuring number of turns; Measuring transformation ratio or coupling factor of windings
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/62Testing of transformers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)

Description

PATENTANSPRUCH: Einrichtung zur Bestimmung des Übersetzungsverhältnisses an Leistungstransformatoren bis zu den höchsten üblichen Nennspannungen mit Niederspannung in einer Kompensationsschaltung nach Patent 684 052, dadurch gekennzeichnet, daß zur Erkennung einer die Prüfeinrichtung gefährdenden hohen Spannung zwischen die Sekundärseite des Hilfswandlers und den Spannungsteiler ein Warnungszeichen, z. B. eine Glimmlampe, geschaltet ist. PATENT CLAIM: Device for determining the transmission ratio on power transformers up to the highest normal nominal voltages with low voltage in a compensation circuit according to patent 684 052, characterized in that to detect a high voltage between the Secondary side of the auxiliary converter and the voltage divider a warning sign, e.g. B. a glow lamp is switched.

Claims (1)

Einrichtung zur Bestimmung des Übersetzungsverhältnisses von Leistungstransformatoren Zusaiz zum, Patent 684 052 Das Hauptpatent betrifft eine Einrichtung zur Bestimmung des Übersetzungsverhältnisses von Leistungstransformatoren bis zu den höchsten Nennspannungen mit Niederspannung in einer Kompensationsschaltung.Device for determining the transformation ratio of power transformers Zusaiz zum, Patent 684 052 The main patent relates to a device for determination the transformation ratio of power transformers up to the highest rated voltages with low voltage in a compensation circuit. Das Prinzip der Einrichtung nach dem Hauptpatent besteht darin, daß die Kompensation durch Vergleich der beiden Spannungen zwischen dem Abgriff des parallel zu der Hochspannungsseite des zu untersuchenden Transformators gelegten Spannungsteilers und der Sekundänvicklung eines an die Niederspannungswicklung angeschlossenen Hilfswandlers mit veränderlichem Übersetzungsverhältnis erfolgt.The principle of the device according to the main patent is that the compensation by comparing the two voltages between the tap of the parallel to the high-voltage side of the transformer to be examined Voltage divider and the secondary winding of a connected to the low-voltage winding Auxiliary converter with variable transmission ratio takes place. Eine dieser Einrichtung entsprechende Schaltung ist in der Zeichnung dargestellt. A circuit corresponding to this device is shown in the drawing shown. Mit W1 ist die Hochspannungswicklung, mit W2 dic Niederspannungswicklung des zu untersuchenden Transformators bezeichnet.With W1 is the high voltage winding, with W2 the low voltage winding of the transformer to be examined. Parallel zur Wicklung W1 liegt der Spannungsteiler R1, der aus zwei festen Teilwiderständer r1 und r2 und dem Schleifdraht S besteht. Zur Wicklung W2 liegt der Hilfswandler HW parallel, der primärseitig mit Anzapfungen versehen ist und sekundärseitig über ein Nullinstrument mit dem Abgriff des Spannungsteilers R1 in Verbindung steht.The voltage divider R1, which consists of two fixed partial resistors r1 and r2 and the sliding wire S consists. To winding W2 the auxiliary converter HW is parallel, which is provided with taps on the primary side and on the secondary side via a zero instrument with the tap of the voltage divider R1 is in communication. Ein besonderer Vorteil der Einrichtung nach dem Hauptpatent ist die bei allen Ubersetzungsverhältnissen annähernd gleich große Kompensationsspannung, die also eine praktisch stets gleiche Empfindlichkeit der Prüfeinrichtung gewährleistet, so daß statt der teuren Galvanometer bei Wahl einer genügend großen Kompensationsspannung Drehspulmeßinstrumente mit Trockengleichrichter als Kompensationsmeßinstrumente verwendet werden können. A particular advantage of the device according to the main patent is that Compensation voltage of approximately the same size for all transmission ratios, which ensures that the test equipment is practically always the same sensitivity, so that instead of the expensive galvanometer when choosing a sufficiently large compensation voltage Moving coil measuring instruments with dry rectifier as compensation measuring instruments can be used. Da bei falscher Bedienung der Prüfeinrichtung oder irgendwelchen Defekten des Prüflings leicht Beschädigungen dieses Instrumentes und des Hilfswandlers eintreten, wird erfindungsgemäß die Anordnung nach dem Hauptpatent dadurch vervollkommnet, daß zur Erkennung einer die Prüfeinrichtung, gefährdenden hohen Spannung zwischen die Sekundärseite des Hilfswandlers und den Spannungsteiler ein Warnungszeichen, z. B. cine glimmlampe, geschaltet ist, die bei Überschreiten der normalen Kompensationsspannung aufleuchtet. Die Ursache solcher erhöhten Spannungen kann eine falsche Polung des Prüflings sein, wodurch sich die Spannung des Hilfswandlers und des Spannungsteilers addieren, oder ein falsch eingestelltes Übersetzungsverhältnis am Übersetzungswähler des Hilfswandlers. Besitzt der Prüfling Windungsschluß, so können ebenfalls für die Prixfeinrichtung gefährliche Spannungen auftreten. In allen Fällen wird durch das Aufleuchten der Glimmlampe i, die nach der Zeichnung zwischen der Sekundärseite des Hilfswandlers HW und dem Spannungsteiler R1 liegt, der Bedienende davor gewarnt, den Empfmdlichkeitsregler 2 des Meßinstrumentes 3 von der Stellung co auf die einzelnen Empfmdlichkeitsstufen zu drehen. As in the case of incorrect operation of the test device or any Defects in the test item can easily damage this instrument and the auxiliary converter occur, according to the invention, the arrangement according to the main patent is perfected by that for the detection of the test equipment, endangering high voltage between the secondary side of the auxiliary transformer and the voltage divider are a warning sign, z. B. cine glow lamp is switched, which when the normal compensation voltage is exceeded lights up. The cause of such increased voltages can be incorrect polarity of the DUT, which changes the voltage of the auxiliary converter and the voltage divider add, or an incorrectly set transmission ratio on the transmission selector of the auxiliary converter. If the test object has a shorted turn, then for dangerous voltages occur in the device. In all cases it will be through the lighting up of the glow lamp i, which according to the drawing between the secondary side of the auxiliary converter HW and the voltage divider R1, the operator has been warned the sensitivity controller 2 of the measuring instrument 3 from the position co to the individual Rotate sensitivity levels.
DEH153877D 1937-12-05 1937-12-05 Device for determining the transmission ratio of power transformers Expired DE685498C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH153877D DE685498C (en) 1937-12-05 1937-12-05 Device for determining the transmission ratio of power transformers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH153877D DE685498C (en) 1937-12-05 1937-12-05 Device for determining the transmission ratio of power transformers

Publications (1)

Publication Number Publication Date
DE685498C true DE685498C (en) 1939-12-19

Family

ID=7181773

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH153877D Expired DE685498C (en) 1937-12-05 1937-12-05 Device for determining the transmission ratio of power transformers

Country Status (1)

Country Link
DE (1) DE685498C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE930936C (en) * 1951-02-10 1955-07-28 Hartmann & Braun Ag Procedure for measuring the errors of voltage transformers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE930936C (en) * 1951-02-10 1955-07-28 Hartmann & Braun Ag Procedure for measuring the errors of voltage transformers

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