DE395595C - Device for power measurement in three-phase networks using the capacitance of bushings or other isolators for voltage division - Google Patents
Device for power measurement in three-phase networks using the capacitance of bushings or other isolators for voltage divisionInfo
- Publication number
- DE395595C DE395595C DEA40695D DEA0040695D DE395595C DE 395595 C DE395595 C DE 395595C DE A40695 D DEA40695 D DE A40695D DE A0040695 D DEA0040695 D DE A0040695D DE 395595 C DE395595 C DE 395595C
- Authority
- DE
- Germany
- Prior art keywords
- bushings
- phase
- capacitance
- isolators
- voltage division
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R11/00—Electromechanical arrangements for measuring time integral of electric power or current, e.g. of consumption
- G01R11/48—Meters specially adapted for measuring real or reactive components; Meters specially adapted for measuring apparent energy
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Description
Einrichtung zur Leistungsmessung in Drehstromnetzen unter Verwendung der Kapazität von Durchführungen oder anderen Isolatoren zur Spannungsteilung. Es ist bekannt, an Durchführungen oder anderen Isolatoren durch Zwischenschaltung isolierter Belege zwischen dem Hochspannungsleiter und Erde eine zweckentsprechende Teilspannung zur überwachun,g der Gesamtspannung zu benutzen. Fügt man zu dieser Meßanordnung noch Stromwandler hinzu, so kann man auch die Leistung kontrollieren. Da der Ladestrom -des Isolatorteils, an den die Spannungsspule ,des Leistungsmessers anzuschließen ist, gegen die zu messende Spannung um 9o° verschoben ist, mißt man die Blindleistung, wenn man das Instrument an phasengleiche Ströme und Spannungen anlegt, die Wirkleistung, wenn diese Ströme und Spannungen um 9o° verschoben sind.Device for power measurement in three-phase networks using the capacity of bushings or other isolators for voltage division. It is known to be isolated on bushings or other insulators by interposing them Document an appropriate partial voltage between the high-voltage conductor and earth to monitor the total voltage. One adds to this measuring arrangement add a current transformer, so you can also control the power. Because the charging current -the isolator part to which the voltage coil of the power meter is to be connected is shifted by 90 ° from the voltage to be measured, the reactive power is measured, if you apply the instrument to currents and voltages in phase, the real power, when these currents and voltages are shifted by 90 °.
Gegenstand der vorliegenden Erfindung ist eine Schaltung, bei der eine einzige Spannung, und zwar die einer Phase gegen Erde, in Wechselwirkung zu den verschiedenen Strömen ge@brarht wird. Die Spa-nnu.ngsw-icklung des Leistungsmessers liegt also fest an einer Phasenspannung, Zur Messung der Wirkleistung führt man dem Instrument die geometrische Summe :der Ströme in den beiden anderen Phasen entweder direkt oder über Stromwandler zu; zur Messung der Blindleistung dagegen benutzt man den in der gleichen Phase fließenden Strom.The present invention is a circuit in which a single voltage, namely that of a phase to earth, in interaction is @breathed in the various currents. The voltage winding of the power meter is therefore firmly attached to a phase voltage, one leads to the measurement of the active power to the instrument the geometric sum: of the currents in either the other two phases directly or via current transformer to; used to measure the reactive power the current flowing in the same phase.
Gegenüber an-deren Schaltungen, bei denen z. B. zur 3Zessun,g .der Wirkleistung der Strom einer Phase und die verkettete Spannung der beiden anderen Phasen benutzt wird, hat diese Schaltung gewisse Vorteile. Die drei Spannungen eines Drehstromnetzes sind unter normalem. Verhältnissen einander mit hinreichender Genauigkeit gleich zu setzen. Von den Strömen kann man -das aber nicht hehaupten. Es erscheint für die Genauigkeit des Meßergebniiss:es also gleichgültig, ab bei der Messung die Größe einer oder mehrerer Phasenspannungen berücksichtigt ist. Dagegen wird eine Schaltung, bei der zwei Ströme dem Instrument zugeführt werden, einen größeren Anspruch ,auf Genauigkeit haben, als wenn nur einer von drei verschiedenen Strömen berücksichtigt ist.Compared to other circuits in which z. B. to 3Zessun, g .der Active power is the current of one phase and the line-to-line voltage of the other two Phases is used, this circuit has certain advantages. The three tensions one Three-phase network are under normal. Relationships with each other with sufficient accuracy to put the same. But that cannot be said of the streams. It appears for the accuracy of the measurement result: it does not matter, from the measurement Size of one or more phase voltages is taken into account. Against it becomes a Circuit in which two currents are fed to the instrument are more demanding on accuracy than if only one of three different currents was considered is.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA40695D DE395595C (en) | 1923-09-21 | 1923-09-21 | Device for power measurement in three-phase networks using the capacitance of bushings or other isolators for voltage division |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA40695D DE395595C (en) | 1923-09-21 | 1923-09-21 | Device for power measurement in three-phase networks using the capacitance of bushings or other isolators for voltage division |
Publications (1)
Publication Number | Publication Date |
---|---|
DE395595C true DE395595C (en) | 1924-05-21 |
Family
ID=6932102
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA40695D Expired DE395595C (en) | 1923-09-21 | 1923-09-21 | Device for power measurement in three-phase networks using the capacitance of bushings or other isolators for voltage division |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE395595C (en) |
-
1923
- 1923-09-21 DE DEA40695D patent/DE395595C/en not_active Expired
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