DE602927C - Fault indicator for three-phase four-wire meter that responds in the event of an interruption or short-circuit in one or two voltage coils - Google Patents

Fault indicator for three-phase four-wire meter that responds in the event of an interruption or short-circuit in one or two voltage coils

Info

Publication number
DE602927C
DE602927C DER81754D DER0081754D DE602927C DE 602927 C DE602927 C DE 602927C DE R81754 D DER81754 D DE R81754D DE R0081754 D DER0081754 D DE R0081754D DE 602927 C DE602927 C DE 602927C
Authority
DE
Germany
Prior art keywords
interruption
responds
phase
fault indicator
voltage coils
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
DER81754D
Other languages
German (de)
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.)
RWE AG
Original Assignee
Rheinisch Westfaelisches Elektrizitaetswerk AG
Publication date
Priority to DER81754D priority Critical patent/DE602927C/en
Application granted granted Critical
Publication of DE602927C publication Critical patent/DE602927C/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

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Description

Störungsanzeiger für Drehstromvierleiterzähler, der bei Unterbrechung oder Windungsschluß einer oder zweier Spannungsspulen anspricht Bei den Vierleiterzählern, die neben den Einphasenzählern hauptsächlich in Benutzung sind, besteht der übelstand, daß die Unterbrechung ,einer Spannungsspule lange Zeit unbemerkt bleiben kann und der Zähler mit verminderter Umdrehungszahl läuft, so daß das Lieferwerk geschädigt wird. Man hat deshalb schon Vorrichtungen benutzt, welche diesen Fehler anzeigen. Es wird beispielsweise die Spannungsspule mit einer Sekundärwicklung versehen, deren Stromkreis eine Signallampe und einen Druckknopf enthält. Der Zählerableser kann dann eine Prüfung vornehmen; man ist aber-von dessen Gewissenhaftigkeit abhängig, und außerdem ist die Prüfung zeitraubend, zumal der-Druckknopf plombiert werden muß. Zum selbsttätigen Anzeigen der Unterbrechung der Spannungsspulen hat man jeder Spule eine Fallklappe zugeordnet, deren Halteklinke beim Stromloswerden der Spule die Fallklappe freigibt. Diese Vorrichtungen können infolge der Remanenz des Spulenkernes oder infolge mechanischer Störungen versagen, und sie treten außerdem auch bei einer kurzen Störung im Netz in Wirkung. Schließlich hat man zum selbsttätigen Anzeigen der Störungen auch eine akustische Signalvorrichtung benutzt, welche einen Elektromagneten mit drei im Stern geschalteten Spulen aufweist. Diese Vorrichtung ist verhältnismäßig teuer und hat den Nachteil, daß sie dauernd Strom verbraucht. Es besteht bei ihrer Verwendung ferner der übelstand, daß ihr Einbau nur unter Eingriff in den Zähler möglich ist, so daß dieser erneut geeicht werden muß.Fault indicator for three-phase four-wire meter, which in the event of an interruption or interturn fault of one or two voltage coils responds With the four-wire meters, which, besides the single-phase meters, are mainly in use, there is the problem, that the interruption of a voltage coil can go unnoticed for a long time and the counter runs at a reduced number of revolutions, so that the delivery mechanism is damaged will. Devices have therefore already been used which indicate this error. For example, the voltage coil is provided with a secondary winding whose Circuit contains a signal lamp and a push button. The meter reader can then conduct an examination; but one is dependent on his conscientiousness, and the test is also time consuming, especially since the pushbutton is sealed got to. Everyone has to display the interruption of the voltage coils automatically Coil is assigned a drop flap, its retaining pawl when the coil is de-energized releases the drop flap. These devices can be due to the remanence of the coil core or fail as a result of mechanical disturbances, and they also occur with a short disturbance in the network in effect. After all, you have to display automatically the disturbance also uses an acoustic signaling device, which an electromagnet with three coils connected in a star. This device is proportionate expensive and has the disadvantage that it constantly consumes electricity. It is hers Use also the disadvantage that their installation only interferes with the meter is possible, so that it has to be calibrated again.

Die Erfindung bdtrifft ebenfalls einen Störungsanzeiger für Drehstromvierleiterzähler', der bei Unterbrechung oder Windungsschluß einer oder zweier Spannungsspulen anspricht. Dieser Störungsanzeiger kann jedoch in einfacher Weise ohne Eingriff in den Zähler angebracht werden; denn er besteht gemäß der Erfindung aus einer zwischen den Sternpunkt der Spannungsspulen und den Nullleiter eingeschalteten und auf die dort auftretende Spannungsdifferenz ansprechenden Glimmlampe. e In der Zeichnung ist eine Ausführungsform der Vorrichtung schematisch dargestellt. Mit a, b, c sind die Außenleiter der Zuleitung und mit d, e, f die Außenleiter der Ableitung bezeichnet. Der Sternpunktg der Spannungsspulen h', i, k ist über .eine Glimmlampe m mit dem Nulleiter o verbunden. Diese Lampe, die zweckmäßig mit Swanfässung versehen ist, um ein Lockern zu vermeiden, kann in einfacher Weise ohne Beeinflussung des Zählers angebracht werden und bietet den Vorteil, daß sie ohne schädliche Induktivität arbeitet und bei sehr geringen Strömen anspricht.The invention also applies to a fault indicator for three-phase four-wire meters, which responds to an interruption or shorted winding of one or two voltage coils. However, this fault indicator can be attached in a simple manner without interfering with the meter; because according to the invention it consists of a glow lamp connected between the neutral point of the voltage coils and the neutral conductor and responding to the voltage difference occurring there. e In the drawing, an embodiment of the device is shown schematically. A, b, c are the outer conductors of the supply line and d, e, f are the outer conductors of the down conductor. The star point of the voltage coils h ', i, k is connected to the neutral conductor o via a glow lamp m. This lamp, which is expediently provided with a Swan socket in order to avoid loosening, can be attached in a simple manner without affecting the meter and has the advantage that it works without harmful inductance and responds at very low currents.

Claims (1)

PATENTANSPRUCH. Störungsanzeiger für Drehstramvierleiterzähler, der bei Unterbrechung oder Windungsschluß einer oder zweier Spannungsspulen anspricht, gekennzeichnet durch eine zwischen den Sternpunkt der Spannungsspulen und den Nulleiter eingeschaltete und auf die dort auftretende Spannungsdifferenz ansprechende Glimmlampe. PATENT CLAIM. Fault indicator for three-phase four-wire meter, which responds to an interruption or shorted winding of one or two voltage coils, characterized by a glow lamp connected between the neutral point of the voltage coils and the neutral conductor and responding to the voltage difference occurring there.
DER81754D Fault indicator for three-phase four-wire meter that responds in the event of an interruption or short-circuit in one or two voltage coils Expired DE602927C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER81754D DE602927C (en) Fault indicator for three-phase four-wire meter that responds in the event of an interruption or short-circuit in one or two voltage coils

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER81754D DE602927C (en) Fault indicator for three-phase four-wire meter that responds in the event of an interruption or short-circuit in one or two voltage coils

Publications (1)

Publication Number Publication Date
DE602927C true DE602927C (en) 1934-09-19

Family

ID=7416571

Family Applications (1)

Application Number Title Priority Date Filing Date
DER81754D Expired DE602927C (en) Fault indicator for three-phase four-wire meter that responds in the event of an interruption or short-circuit in one or two voltage coils

Country Status (1)

Country Link
DE (1) DE602927C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE962729C (en) * 1954-12-30 1957-04-25 Landis & Gyr Ag Fault indicator for voltage coils of three-phase four-wire meters
DE973239C (en) * 1951-12-27 1959-12-31 Ericsson Telefon Ab L M Test arrangement for voltage coils in three-phase alternating current meters with neutral conductor for unevenly loaded phases under load

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE973239C (en) * 1951-12-27 1959-12-31 Ericsson Telefon Ab L M Test arrangement for voltage coils in three-phase alternating current meters with neutral conductor for unevenly loaded phases under load
DE962729C (en) * 1954-12-30 1957-04-25 Landis & Gyr Ag Fault indicator for voltage coils of three-phase four-wire meters

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