DE740487C - Three-phase current meter that can be used for three- and four-wire connection with two drive systems connected in an Aron circuit - Google Patents

Three-phase current meter that can be used for three- and four-wire connection with two drive systems connected in an Aron circuit

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Publication number
DE740487C
DE740487C DES145566D DES0145566D DE740487C DE 740487 C DE740487 C DE 740487C DE S145566 D DES145566 D DE S145566D DE S0145566 D DES0145566 D DE S0145566D DE 740487 C DE740487 C DE 740487C
Authority
DE
Germany
Prior art keywords
wire connection
drive systems
systems connected
phase current
current meter
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
DES145566D
Other languages
German (de)
Inventor
Hans Nuetzelberger
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 AG
Original Assignee
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 AG filed Critical Siemens AG
Priority to DES145566D priority Critical patent/DE740487C/en
Application granted granted Critical
Publication of DE740487C publication Critical patent/DE740487C/en
Expired legal-status Critical Current

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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
    • G01R11/36—Induction meters, e.g. Ferraris meters
    • G01R11/40—Induction meters, e.g. Ferraris meters for polyphase operation
    • G01R11/42—Circuitry therefor
    • 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
    • G01R11/36—Induction meters, e.g. Ferraris meters
    • G01R11/40—Induction meters, e.g. Ferraris meters for polyphase operation

Landscapes

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

Description

Für Drei- und Vierleiteranschluß verwendbarer Drehstromzähler mit zwei in Aronschaltung angeschlossenen Triebsystemen Die Erfindung bezieht sich auf einen Drehstromzähler, der zwei in Aronschaltung angeschlossene Triebsysteme hat. Sie hat die Aufgabe, einen solchen Zähler auch für Vier-;.leiteranschluß verwendbar zu machen, ohne daß Unterschiede in der Meßgenauigkeit zwischen Drei- und Vierleiteranschluß auftreten. Erfindungsgemäß ist zwischen zwei Anschlußklemmen des Nulleiters die Stromspule und zwischen einer dieser Klemmen und der gemeinsamen Anschlußphase der Spannungswicklungen der Aronschaltung die Spannungsspule eines dritten Triebsystems angeschlossen, das ebenso gebaut sein kann wie die beiden anderen Systeme.Three-phase electricity meter with two drive systems connected in Aron circuit The invention relates to a three-phase energy meter that has two drive systems connected in an Aron circuit. Its task is to make such a counter usable for four-wire connection to make without differences in the measurement accuracy between three and four-wire connection appear. According to the invention is between two terminals of the neutral conductor Current coil and between one of these terminals and the common connection phase of the Voltage windings of the Aron circuit, the voltage coil of a third drive system connected, which can be built in the same way as the other two systems.

Die Erfindung wird an Hand der Zeichnung näher erläutert. The invention is explained in more detail with reference to the drawing.

In Fig. I sind an die Phasen R, S, T die beiden Triebsysteme I, 2 in Aronschaltung angeschlossen. Die Ansohlußklemmen für die einzelnen Phasenleiter sind mit k, K bezeichnet. Zwischen die Anschlußklemmen I; 2 des Nulleiters 0 ist die Stromspule 31, zwischen die Klemme I und die Phase S die Spannungsspule 32 eines dritten Triebsystems III angeschlossen. In Fig. I, the phases R, S, T are the two drive systems I, 2 connected in Aron circuit. The connection terminals for the individual phase conductors are denoted by k, K. Between the terminals I; 2 of the neutral conductor is 0 the current coil 31, between the terminal I and the phase S, the voltage coil 32 of a third drive system III connected.

Daß bei Dreileiteranschluß die in Aron schaltung angeschlossenen Systeme I und II richtig messen, ist bekannt. Daß sich durch das Zusammenwirken der SystemeI bis III bei Vierleiteranschluß eine richtige Messung ergibt, wird an Hand der Fig. 2 erläutert, die von der Hilfsvorstellung ausgeht, daß zunächst vier Meßsysteme verwendet werden. That with three-wire connection the connected in Aron circuit Measuring systems I and II correctly is known. That through cooperation the systems I to III with a four-wire connection give a correct measurement, is on Hand of Fig. 2 explained, which is based on the auxiliary concept that initially four Measuring systems are used.

Die Spannungsspulen von drei Meßsystemen sind zu einem unsymmetrisch liegenden Sternpunkt X zusammengefaßt. Die Spannungsspule des vierten Systems liegt zwischen dem Nulleiter 0 und dem Sternpunkt X. Von dem Punkt X ausgehend kann nun, wie für -Einphasenleitungen, für jeden Leiter R, S, T, O die Leistung ermittelt werden. Die Summe dieser Leistungen entspricht dann der Gesamtleistung des Vierleitersystems. Sie ergibt sich zu N = UR'JR + US'JS + UT'JT - UOJO.The voltage coils of three measuring systems are asymmetrical to one lying star point X combined. The voltage coil of the fourth system is on between the neutral conductor 0 and the star point X. Starting from the point X, As for single-phase lines, the power is determined for each conductor R, S, T, O will. The sum these services then correspond to the total service of the four-wire system. It results from N = UR'JR + US'JS + UT'JT - UOJO.

Die Bedeutung der Spannungsvektoren ist aus der Fig. 2 ersichtlich. Die Stromvektoren entsprechen den in den Leitern R, S, T, 0 ffießenden Strömen. Das vierte Glied hat negatives Vorzeichen, weil die Spannung UO in Fig. 2 im Gegensatz zu den übrigen Spannungen, z. B. UR', auf den Sternpunkt X zu gerichtet ist. Da die Summe der Ströme in allen vier Leitern 0 ist, ergibt sich die weitere Gleichung JR + JS + JT + JO = O und aus dieser JS = - JR - JT - JO.The meaning of the voltage vectors can be seen from FIG. The current vectors correspond to the currents flowing in the conductors R, S, T, 0. The fourth term has a negative sign because the voltage UO in FIG. 2 is in contrast to the other voltages, e.g. B. UR ', is directed towards the star point X. There the sum of the currents in all four conductors is 0, the following equation results JR + JS + JT + JO = O and from this JS = - JR - JT - JO.

Damit läßt sich die erste Gleichung überführen in N = UR'JR + US' (- JR - JT - JO) + UT'JT - UOJO und nach einiger Umformung in N = JR (UR' - US') + JT(UT' - US') - JO (UO + US'). With this the first equation can be converted into N = UR'JR + US ' (- JR - JT - JO) + UT'JT - UOJO and after some transformation into N = JR (UR '- US') + JT (UT '- US') - JO (UO + US ').

Nun ist aber UR' - US' = URS, UT - U5, = GUTS, (To + US' = U5 und infolgedessen ergibt sich N = URSJR + UTSJT - USJO.But now UR '- US' = URS, UT - U5, = GUTS, (To + US '= U5 and as a result, N = URSJR + UTSJT - USJO.

Zu dem gleichen Ergebnis würde man kommen, wenn man den Sternpunkt X der Fig. 2 mit S zusammenfallen läßt. In der Gleichung N = UR'JR + US'JS + UT'JT - UOJO würde dann UR' zu URS, UT' zu UTS und UO zu US werden, während US' verschwindet.One would come to the same result if one were to use the star point X of FIG. 2 can coincide with S. In the equation N = UR'JR + US'JS + UT'JT - UOJO would then change UR 'to URS, UT' to UTS and UO to US, while US 'disappears.

Die Erfindung bietet den Vorteil, daß der Drehstromzähler bei Drei- und Vierleiteranschluß die gleiche hohe Meßgenauigkeit hat. The invention offers the advantage that the three-phase meter with three- and four-wire connection has the same high measurement accuracy.

Auch kann er für beide Anschlußarten geeicht werden.It can also be calibrated for both types of connection.

Claims (1)

P A T E N T A N S P R U C H : Für Drei- und Vierleiteranschluß verwendbarer Drehstromzähler mit zwei in Aronschaltung angeschlossenen Triebsystemen, dadurch gekennzeichnet, daß zwischen zwei Anschlußklemmen (I, 2) des Nulleiters (O) die Stromspule (3I) und zwischen einer (I) dieser Klemmen und der gemeinsamen Anschlußphase (S) der Spannungswicklungen der Aronschlatung (I, II) die Spannungsspule (32) eines dritten Triebsystems (III) angeschlossen ist. P A T E N T A N S P R U C H: Can be used for three and four wire connections Three-phase energy meter with two drive systems connected in Aron circuit, thereby characterized in that between two terminals (I, 2) of the neutral conductor (O) the Current coil (3I) and between one (I) of these terminals and the common connection phase (S) the voltage windings of the Aronschlatung (I, II) the voltage coil (32) of a third drive system (III) is connected.
DES145566D 1941-05-30 1941-05-30 Three-phase current meter that can be used for three- and four-wire connection with two drive systems connected in an Aron circuit Expired DE740487C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES145566D DE740487C (en) 1941-05-30 1941-05-30 Three-phase current meter that can be used for three- and four-wire connection with two drive systems connected in an Aron circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES145566D DE740487C (en) 1941-05-30 1941-05-30 Three-phase current meter that can be used for three- and four-wire connection with two drive systems connected in an Aron circuit

Publications (1)

Publication Number Publication Date
DE740487C true DE740487C (en) 1943-10-21

Family

ID=7542267

Family Applications (1)

Application Number Title Priority Date Filing Date
DES145566D Expired DE740487C (en) 1941-05-30 1941-05-30 Three-phase current meter that can be used for three- and four-wire connection with two drive systems connected in an Aron circuit

Country Status (1)

Country Link
DE (1) DE740487C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998044355A2 (en) * 1997-03-27 1998-10-08 Siemens Aktiengesellschaft Electricity meter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998044355A2 (en) * 1997-03-27 1998-10-08 Siemens Aktiengesellschaft Electricity meter
DE19713120C1 (en) * 1997-03-27 1998-10-29 Siemens Ag Electricity meter
WO1998044355A3 (en) * 1997-03-27 1999-01-07 Siemens Ag Electricity meter
US6275021B1 (en) 1997-03-27 2001-08-14 Siemens Aktiengesellschaft Electricity meter

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