DE710368C - Method and device for testing or calibrating three-phase current measuring devices, in particular three-phase current meters, using a single-phase test device, in particular calibrating devices - Google Patents
Method and device for testing or calibrating three-phase current measuring devices, in particular three-phase current meters, using a single-phase test device, in particular calibrating devicesInfo
- Publication number
- DE710368C DE710368C DES135174D DES0135174D DE710368C DE 710368 C DE710368 C DE 710368C DE S135174 D DES135174 D DE S135174D DE S0135174 D DES0135174 D DE S0135174D DE 710368 C DE710368 C DE 710368C
- Authority
- DE
- Germany
- Prior art keywords
- phase
- test device
- voltage
- calibrating
- phase current
- 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
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Description
Verfahren und Vorrichtung zum Prüfen oder Eichen von Drehstrommeßgeräten, insbesondere Drehstromzählern, unter Verwendung eines einphasigen Prüfgerätes, insbesondere Eichzählers Zusatz zum Patent 692 485 In dem Hauptpatent 692 485 ist ein Verfahren und eine Vorrichtung zum Prüfen oder Eichen von Drehstrommeßgeräten, insbesondere Drehstromzählern, unter Verwendung eines einphasigen Prüfgeräts, insbesondere Eichzählers beschrieben, das je nach der Art der gewählten Prüfschaltung, z. B. Ein-, Zwei- oder Dreiwattmetermethode, nacheinander in die jeweiligen Netzphasen eingeschaltet wird. Dabei läßt man das zu prüfende Drehstromgerät ohne Änderung seiner betriebsmäßigen Schaltung über zwei Wandlersätze auf die Strom- und Spannungs spule des einphasigen Prüfgeräts und unmittelbar oder über die gleichen Wandlersätze auf ein nach der bekannten Zweiwattmetermethode geschaltetes zusätzliches Hilfsgerät, insbesondere Relais, Zähler, Wattmeter, so einwirken, daß nach erfolgter Abgleichung des Laststromkreises mittels der Belastungswiderstände der vom Hilfsgerät angezeigte Wert Null wird und der in diesem Augenblick vom einphasigen Prüfgerät angezeigte Wert dem Drehstromwert des zu prüfenden Zählers entspricht. Die Spannungsspule des Prüfgeräts wird im Ausführungsbeispiel des Hauptpatents von zwei verketteten Spannungen des Drehstromsystems beeinflußt, deren Vektoren unter stumpfem Winkel aneinandergereiht sind. Die Stromspule des Prüfgeräts wird von zwei Stromvektoren, die auch auf das Hilfsgerät einwirken, gemeinsam beeinflußt. Die Summe dieser Vektoren wird durch gebildet, daß sie unter spitzem Winkel aneinandergereiht werden. Erfindungsgemäß werden im Gegensatz zum Ausftihrungsbeispiel des Hauptpatents für das Prüfgerät die Vektoren der verketteten Spannungen unter spitzem Winkel, die Vektoren der Ströme unter stumpfem Winkel aneinandergereiht. Da die Aneinanderreihung der Vektoren der verketteten Spannung unter spitzem Winkel (600) phasenmäßig die den beiden Vektoren im Spannungsdreieck gegenüberl iegende verkettete Spannung ergibt, kann man gleich diese auf das Prüfgerät einwirken lassen. Dadurch wird ein Wandler des Spannungswandlersatzes eingespart, oder der Spannungswandlersatz kann bei Anschluß des Prüflings an die betreffende verkettete Spannung auch vollständig weggelassen werden.Method and device for testing or calibrating three-phase current measuring devices, in particular three-phase meters, using a single-phase test device, in particular Calibration counter's addition to patent 692 485 In the main patent 692 485 there is a method and a device for testing or calibrating three-phase current measuring devices, in particular Three-phase electricity meters, using a single-phase test device, in particular calibration meters described, depending on the type of test circuit selected, z. B. One, two or three watt meter method, switched on one after the other in the respective mains phases will. You can leave the three-phase device to be tested without changing its operational Switching via two transformer sets to the current and voltage coil of the single-phase Test device and immediately or via the same transducer sets on one after the well-known two watt meter method switched additional auxiliary device, in particular Relays, counters, wattmeters act in such a way that after the load circuit has been adjusted the value displayed by the auxiliary device becomes zero by means of the load resistances and the value displayed by the single-phase test device at that moment is the three-phase current value of the meter to be checked. The voltage coil of the test device is in the exemplary embodiment of the main patent of two linked voltages of the three-phase system influences whose vectors are lined up at an obtuse angle. The current coil of the test device is controlled by two current vectors, which also act on the auxiliary device, influenced together. The sum of these vectors is formed by the fact that they are under be strung together at an acute angle. According to the invention, in contrast to Ausftihrungsbeispiel the main patent for the tester the vectors of the chained Tensions at an acute angle, the vectors of the currents strung together at an obtuse angle. Because the stringing together of the vectors of the chained tension at an acute angle (600) in phase terms the opposite of the two vectors in the voltage triangle If there is a chained voltage, you can let this act on the test device. This saves one converter from the voltage converter set, or the voltage converter set can also be complete when the DUT is connected to the relevant line-to-line voltage can be omitted.
Es handelt sich dabei um Ströme und Spannungen, die bei der bekannten Zweiwattmeterschaltung vorkommen. These are currents and voltages that are common to the known Two watt meter circuit occur.
Die Erfindung soll an Hand der Zeichnung näher erläutert werden. Für die einzelnen Teile sind die, gleichen Bezugszeichen verwendet wie im Hauptpatent. The invention will be explained in more detail with reference to the drawing. The same reference numerals are used for the individual parts as in the main patent.
P ist der Prüfling mit den beiden Systemen 1 und 2. II, 21 sind die beiden Stromspulen. P is the test item with the two systems 1 and 2. II, 21 are the two power coils.
I2, 22 sind die beiden Spannungsspulen. I2, 22 are the two voltage coils.
N ist ein Spannungswandler mit der Wicklung 14. die bei in für die dem Eichzähler E entsprechende Spannung angezapft ist. 111 ist ein Stromwandlersatz, bei dem die Sekundärwicklungen I6, 26 der beiden Wandler in bekannter Weise in Differenz geschaltet sind.N is a voltage converter with the winding 14. which is in for the the voltage corresponding to the calibration meter E is tapped. 111 is a current transformer set, in which the secondary windings I6, 26 of the two converters differ in a known manner are switched.
E ist der Eichzähler oder ein anderes einphasiges Prüfgerät mit der Stromwicklung 32 und der Spannungswicklung 3I. H ist das Hilfsgerät mit den beiden Hauptstromwicklungen I7, 27 und den beiden Spannungswicklungen 18, 28. Auf die Hauptstromwicklungen I7, 27 des Hilfsgerätes H wirken die Ströme der beiden Wandler I6, 26 ein, die den Strömen in den Hauptstromwicklungen II, 21 des Prüflings P entsprechen. Die Hauptstromwicklung 32 des einphasigen Prüfgerätes E wird dagegen von der Differenz der beiden Ströme durchflossen.E is the calibration meter or another single-phase test device with the Current winding 32 and the voltage winding 3I. H is the auxiliary device with the two Main current windings I7, 27 and the two voltage windings 18, 28. On the main current windings I7, 27 of the auxiliary device H, the currents of the two converters I6, 26 act, which the Currents in the main current windings II, 21 of the test object P correspond. The main current winding 32 of the single-phase test device E, however, is based on the difference between the two currents flowed through.
Auf die Spannungsspule 3I des Prüfgerätes E wirkt die Spannung RT ein. Sie entspricht der Vektorsumme der beiden auf die Spannungsspule 12, 22 des Prüflings P einwirkenden Spannungen und kann statt durch einen einzigen Spannungswandler 14 auch durch zwei diese Vektorensumme hildende Wandler erzeugt werden. Die Spannungsspulen 18 und 28 des Hilfsgeräts JJ sind ebenso geschaltet wie die Spannungsspulen 12, 22 des Prüflings P. W ist die regelbare Belastung. The voltage RT acts on the voltage coil 3I of the test device E. a. It corresponds to the vector sum of the two on the voltage coil 12, 22 of the DUT P acting voltages and can be held by a single voltage transformer 14 can also be generated by two converters forming this vector sum. The tension coils 18 and 28 of the auxiliary device JJ are connected in the same way as the voltage coils 12, 22 of the test item P. W is the controllable load.
Ist während der Prüfperiode die Belastung derart abgeglichen, daß die Angaben des Hilfsgeräts H verschwinden, dann müssen die Angaben des Eichgerätes E bei fehlerireiem Arbeiten des Prüflings P genau mit den Angaben dieses Prüflings übereinstimmen, wenn man die entsprechenden Strom- und Spannungsübersetzungsverhältnisse, Zählerkonstanten usw. in der üblichen Weise berücksichtigt. Is the load balanced during the test period in such a way that the details of the auxiliary device H disappear, then the details of the calibration device must E in the case of error-free operation of the test item P exactly with the specifications of this test item match if one has the corresponding current and voltage transformation ratios, Counter constants etc. are taken into account in the usual way.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES135174D DE710368C (en) | 1938-12-25 | 1938-12-25 | Method and device for testing or calibrating three-phase current measuring devices, in particular three-phase current meters, using a single-phase test device, in particular calibrating devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES135174D DE710368C (en) | 1938-12-25 | 1938-12-25 | Method and device for testing or calibrating three-phase current measuring devices, in particular three-phase current meters, using a single-phase test device, in particular calibrating devices |
Publications (1)
Publication Number | Publication Date |
---|---|
DE710368C true DE710368C (en) | 1941-09-11 |
Family
ID=7539925
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES135174D Expired DE710368C (en) | 1938-12-25 | 1938-12-25 | Method and device for testing or calibrating three-phase current measuring devices, in particular three-phase current meters, using a single-phase test device, in particular calibrating devices |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE710368C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6633102B2 (en) | 2001-09-07 | 2003-10-14 | Kabushiki Kaisha Moric | Insulator for armature of dynamo-electric machine |
-
1938
- 1938-12-25 DE DES135174D patent/DE710368C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6633102B2 (en) | 2001-09-07 | 2003-10-14 | Kabushiki Kaisha Moric | Insulator for armature of dynamo-electric machine |
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