DE389929C - Three-phase current meter with two measuring systems for four-wire three-phase systems - Google Patents

Three-phase current meter with two measuring systems for four-wire three-phase systems

Info

Publication number
DE389929C
DE389929C DEA36113D DEA0036113D DE389929C DE 389929 C DE389929 C DE 389929C DE A36113 D DEA36113 D DE A36113D DE A0036113 D DEA0036113 D DE A0036113D DE 389929 C DE389929 C DE 389929C
Authority
DE
Germany
Prior art keywords
systems
phase
measuring systems
wire
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
DEA36113D
Other languages
German (de)
Inventor
Zalmann Ciffrinowitsch
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.)
AEG AG
Original Assignee
AEG 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 AEG AG filed Critical AEG AG
Priority to DEA36113D priority Critical patent/DE389929C/en
Application granted granted Critical
Publication of DE389929C publication Critical patent/DE389929C/en
Expired legal-status Critical Current

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
    • G01R11/36—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)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Description

Drehstromzähler mit zwei bleßsystemen für Vierleiterdrehstromanlagen. In Vierleiterdrehstromanlagen mit Nullleiter für gemischte Kraft- und Lichtbelastung werden zur Messung des Stromverbrauches Drehstromzähler mit drei Meßsvstemen in der bekannten Dreiwattmeterschaltung verwendet. Die Kraftstromverbrauiher werden in der Regel an die -verketteten Spannungen gelegt und das Licht zwischen den Hauptleitungen und dem Nulleiter --geschaltet. Wenn die Belastung hauptsächlich aus Kraftstrom besteht und verhältnismäßig wenig Lichtstrom verbraucht wird, ist es vorteilhaft, einen Zähler mit zwei Meßsystemen statt des erheblich teureren Drehstromzählers mit drei Systemen zu verwenden. Der Lichtstrom wird in diesem Falle nur- von einer Hauptleitung und dem Nulleiter abgenommen.Three-phase energy meter with two bleeding systems for four-wire three-phase systems. In four-wire three-phase systems with neutral wire for mixed force and light loads are used to measure power consumption, three-phase meters with three measuring systems in the well-known three-watt meter circuit is used. The power consumers will be usually connected to the concatenated voltages and the light between the main lines and the neutral - switched. When the load is mainly from power current exists and relatively little luminous flux is consumed, it is advantageous to a meter with two measuring systems instead of the considerably more expensive three-phase meter to use with three systems. In this case, the luminous flux comes from only one person Main line and the neutral conductor removed.

Den Gegenstand der Erfindung bildet ein Drehstromzähler mit zwei Meßsystemen für den obenerwähnten Zweck.The subject of the invention is a three-phase meter with two measuring systems for the aforementioned purpose.

Der Zähler besteht aus zwei Meßsystemen in der bekannten Aronschaltung. Die beiden Hauptstromwick4ungen a und b (Abb. i) der Meßsysteme erhalten Zusatzwicklungen c und d, welche ein Drittel der Windungen der Hauptstromspulen 'erhalten und hintereinander geschaltet sind. Die Zusatzwicklungen c und d führen zu den Klemmen e und f, liegen also in Reihe mit dem Lichtstromkreis g zwischen der Leitung 3 und dem Nulleiter o. Die Kraftverbraucher k sind an die verkettete Spannung angeschlossen.The counter consists of two measuring systems in the well-known Aron circuit. The two main current windings a and b (Fig. I) of the measuring systems have additional windings c and d, which receive a third of the turns of the main current coils' and one behind the other are switched. The additional windings c and d lead to the terminals e and f, are so in series with the lighting circuit g between the line 3 and the neutral conductor o. The power consumers k are connected to the line voltage.

Aus dem Diagramm (Abb. 2) ist zu ersehen, daß der Zähler den Stromverbrauch des Stromkreises g richtig anzeigt, und zwar kann die Belastung sowohl induktionsfrei als auch induktiv sein, so .daß an diesen Stromkreis auch Bügeleisen oder Heizkörper mit Selbstinduktion angeschlossen werden können.From the diagram (Fig. 2) it can be seen that the meter measures the electricity consumption of the circuit g shows correctly, and indeed the load can be both induction-free as well as inductive, so that an iron or radiator can also be connected to this circuit can be connected with self-induction.

Der Strom der Zusatzwicklungen c und d hat bei induktionsfreier Belastung des Lichtstromkreises die in der Abb. 2 durch den Vektor J (3 - o) angegebene Richtung. Die Spannung, welche mit der Stromwicklung c zusammenwirkt, hat die Richtung E (i -3) und die Spannung, die mit der Wicklung d zusammenwirkt, die Richtung E (2 - 3). Der Strom J (3 -o) ist gegen .die Spannung E (r - 3) um 3o° und gegen die Spannung E (2 - 3) um i5o° verschoben.The current of the additional windings c and d has an induction-free load of the lighting circuit in the direction indicated in Fig. 2 by the vector J (3 - o). The voltage that interacts with the current winding c has the direction E (i -3) and the voltage that interacts with the winding d, the direction E (2 - 3). The current J (3 -o) is against the voltage E (r - 3) by 30 ° and against the voltage E (2 - 3) shifted by 150 °.

Das Drehmoment des Zählers, welches proportional der Belastung ist, ist gleich: D = 1/s J (3 - o) E (i - 3) cos 30' -1/s 1 (3 - o) E (2 - 3) cös 1:50 ' _ -1/3 .1 (3 - o) E (1 - 3) '1/2 1/3 + 1/s J (3 - o) E (z - 3) 1/2 y3# S.iind die Spannungen untereinander gleich und ihre Summe gleich Null, was in Drehstromnetzen praktisch der Fall ist, so kann an Stelle von E (i - 3) und E (2 - 3) e j/3 gesetzt werden, so daß D=1/sJ(3-o) e v3 1/2y-3 1I3 .1 (3 - o) e V3 1/2 V-3 = J (3 - o) e wird. Der Zähler zeigt demnach den Stromverbrauch des Lichtstromkreises richtig an. Basselbe läßt sich auch für induktive Belastung nachweisen.The torque of the meter, which is proportional to the load, is equal to: D = 1 / s J (3 - o) E (i - 3) cos 30 ' -1 / s 1 (3 - o) E (2 - 3) cös 1:50 ' _ -1 / 3 .1 (3 - o) E (1 - 3) '1/2 1/3 + 1 / s J (3 - o) E (z - 3) 1/2 y3 # If the voltages are equal to one another and their sum is equal to zero, which is practically the case in three-phase networks, then ej / 3 can be set in place of E (i - 3) and E (2 - 3), so that D = 1 / sJ (3-o) e v3 1 / 2y-3 1I3 .1 (3 - o) e V3 1/2 V-3 = J (3 - o) e becomes. The meter shows the power consumption of the lighting circuit correctly. The Bass Elbe can also be demonstrated for inductive loads.

Claims (1)

PATENTANSPRUCH: Drehstromzähler mit zwei Meßsysternen für Vierleiterdrehstromanlagen mit Kraftanschluß zwischen den Hauptleitungen und Lichtanschluß zwischen einer Hauptleitung und dem Nulleiter, dadurch gekennzeichnet, daß die eine Hauptleitung, welche normalerweise in keines der zwei Meßsvsteme eingeführt wird, über Zusatzwicklungen geht, welche auf Jen Hauptstrommaggneten beider Meflsysterne untergebracht sind und ein Drittel der Windungszahl der Strornspulen .der Meßsysteme besitzen. PATENT CLAIM: Three-phase current meter with two measuring systems for four-wire three-phase systems with power connection between the main lines and light connection between a main line and the neutral conductor, characterized in that the one main line, which is normally not introduced into either of the two measuring systems, goes through additional windings which are connected to the main current magnets of both measuring systems are housed and have a third of the number of turns of the Strornspulen .der measuring systems.
DEA36113D 1921-08-26 1921-08-26 Three-phase current meter with two measuring systems for four-wire three-phase systems Expired DE389929C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEA36113D DE389929C (en) 1921-08-26 1921-08-26 Three-phase current meter with two measuring systems for four-wire three-phase systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA36113D DE389929C (en) 1921-08-26 1921-08-26 Three-phase current meter with two measuring systems for four-wire three-phase systems

Publications (1)

Publication Number Publication Date
DE389929C true DE389929C (en) 1924-02-15

Family

ID=6929442

Family Applications (1)

Application Number Title Priority Date Filing Date
DEA36113D Expired DE389929C (en) 1921-08-26 1921-08-26 Three-phase current meter with two measuring systems for four-wire three-phase systems

Country Status (1)

Country Link
DE (1) DE389929C (en)

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