DE584846C - Procedure for checking the suitability of oils for electrotechnical purposes - Google Patents

Procedure for checking the suitability of oils for electrotechnical purposes

Info

Publication number
DE584846C
DE584846C DE1930584846D DE584846DD DE584846C DE 584846 C DE584846 C DE 584846C DE 1930584846 D DE1930584846 D DE 1930584846D DE 584846D D DE584846D D DE 584846DD DE 584846 C DE584846 C DE 584846C
Authority
DE
Germany
Prior art keywords
oils
suitability
checking
procedure
purposes
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
DE1930584846D
Other languages
German (de)
Inventor
Dr Andreas Gemant
Dr-Ing Franz Schrottke
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 Schuckertwerke AG
Siemens AG
Original Assignee
Siemens Schuckertwerke AG
Siemens 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 Siemens Schuckertwerke AG, Siemens AG filed Critical Siemens Schuckertwerke AG
Application granted granted Critical
Publication of DE584846C publication Critical patent/DE584846C/en
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/21—Polarisation-affecting properties

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Description

Verfahren zum Prüfen der Eignung von ölen für elektrotechnische Zwecke Bisher war es allgemein üblich, die Höhe der dielektrischen Verluste von Ölen, die insbesondere in der Hochspannungstechnik eine bedeutende Rolle spielen, mit Hilfe der Scheringbrücke zu bestimmen. Dies ist jedoch umständlich und erfordert viel Zeit.Process for testing the suitability of oils for electrotechnical purposes Up until now it was common practice to determine the level of dielectric losses of oils that especially in the high voltage technology play a significant role with help to determine the Scheringbrücke. However, this is cumbersome and requires a lot Time.

Gemäß der Erfindung werden die Nachteile der bisher gebräuchlichen Untersuchungsmethoden dadurch vermieden, daß man das Öl bei tiefen Temperaturen, vorzugsweise in der Nähe des Stockpunktes, mit Hilfe eines Mikroskops mit gekreuzten Nikols auf leuchtende Punkte auf dunklem Hintergrund untersucht. Es hat sich herausgestellt, daß die Arten von Ölen, die auf dunklem Hintergrund keine leuchtenden Punkte zeigen, für elektrotechnische Zwecke besonders gut geeignet sind, da sie homogen sind und niedrige dielektrisohe Verluste haben: Der größte Teil der gebräuchlichen Öle läßt solche leuchtenden Punkte erkennen; die ein Zeichen von Inhomogenitäten, also von festen Einlagerungen im flüssigen Medium sind. Solche Öle haben, wie Vergleichsmessungen mit der Scheringbrücke bewiesen haben, wesentlich höhere dielektrische Verluste als diejenigen Öle, die keine Inhomogenitäten erkennen lassen.According to the invention, the disadvantages of the previously common Investigation methods avoided by using the oil at low temperatures, preferably near the pour point, using a microscope with crossed Nikols examined for luminous points on a dark background. It turned out that the types of oils that show no luminous dots on a dark background, are particularly well suited for electrical engineering purposes because they are homogeneous and Have low dielectric losses: Most of the oils in use leave recognize such luminous points; which is a sign of inhomogeneities, i.e. of are solid deposits in the liquid medium. Such oils have how comparative measurements with the Schering Bridge have proven significantly higher dielectric losses than those oils that do not show any inhomogeneities.

Es wird daher vorgeschlagen, Öle, die im Polarisationsmikroskop bei tiefen Temperaturen keine Inhomogenitäten erkennen lassen, für elektrotechnische Zwecke, insbesondere für Hochspannungskabel, zu verwenden.It is therefore proposed to use oils that are used in the polarizing microscope low temperatures do not reveal any inhomogeneities, for electrotechnical Purposes, especially for high-voltage cables.

Die Untersuchung von Ölen bei tiefen Temperaturen unterhalb q.0° C mit Hilfe eines Mikroskops mit gekreuzten Nikols auf leuchtende Punkte ist bereits an sich bei wissenschaftlichen Untersuchungen der Viscosität bekannt. Man hatte bisher jedoch noch nicht die praktische Nutzanwendung gezogen, diese optische Methode zur schnellen Bestimmung der dielektrischen Eigenschaften bei der Auswahl von Ölen für elektrotechnische Zwecke zu gebrauchen. Hierin liegt der Fortschritt gemäß der Erfindung.The investigation of oils at low temperatures below q.0 ° C using a microscope with crossed Nikols on luminous points is already known per se in scientific studies of viscosity. One had However, this optical method has not yet been put to practical use for quick determination of the dielectric properties when selecting oils to be used for electrotechnical purposes. Herein lies the progress according to the Invention.

Claims (1)

PATENTANSPRUCH: Verfahren zum Prüfen der Eignung von Ölen für elektrotechnische Zwecke; insbesondere für Hochspannungskabel, dadurch gekennzeichnet, daß man die Öle in an sich bekannter Weise bei tiefen Temperaturen, jedoch nicht solchen, bei denen die Öle erstarrt sind, mit Hilfe eines Mikroskops mit gekreuzten Nikols auf leuchtende Punkte auf dunklem Hintergrund untersucht.PATENT CLAIM: Method for testing the suitability of oils for electrotechnical applications Purposes; in particular for high voltage cables, characterized in that the Oils in a manner known per se at low temperatures, but not such where the oils have solidified, using a microscope with crossed Nikols examines luminous dots on dark background.
DE1930584846D 1930-11-19 1930-11-19 Procedure for checking the suitability of oils for electrotechnical purposes Expired DE584846C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE584846T 1930-11-19

Publications (1)

Publication Number Publication Date
DE584846C true DE584846C (en) 1933-09-25

Family

ID=6571755

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1930584846D Expired DE584846C (en) 1930-11-19 1930-11-19 Procedure for checking the suitability of oils for electrotechnical purposes

Country Status (1)

Country Link
DE (1) DE584846C (en)

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