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 coilsInfo
- 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
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)
- 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)
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)
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 |
-
0
- DE DER81754D patent/DE602927C/en not_active Expired
Cited By (2)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
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 | |
DE741178C (en) | Insulation monitoring and earth fault display device for three-phase systems | |
DE973239C (en) | Test arrangement for voltage coils in three-phase alternating current meters with neutral conductor for unevenly loaded phases under load | |
DE19908901C1 (en) | Electricity meter | |
DE822134C (en) | Rotating field direction indicator | |
DE892632C (en) | Fault indicator for three-phase four-wire meter | |
DE700881C (en) | Arrangement for the precise measurement or registration of the voltage, especially in power plants, and for the precise detection of voltage fluctuations | |
DE430050C (en) | Device for testing consumption lines for short-circuit current | |
DE552521C (en) | Arrangement for the remote measurement of electrical operating quantities in power transmission systems without special measuring lines | |
DE967448C (en) | Device for measuring the fault location distance in the event of short-circuiting of lines | |
DE881463C (en) | Procedure for the remote measurement and recording of power and power factor as well as current and voltage using instrument transformers | |
DE3201868C2 (en) | Arrangement for measuring the expected inrush current of a switched off AC voltage network for energy supply | |
DE646169C (en) | Procedure for monitoring high-voltage systems with earth fault extinguishers | |
DE913446C (en) | Device for checking multi-core cables for correct wire sequence of the individual conductors, especially in switchgear | |
DE894284C (en) | Monitoring device for multi-phase step transformers with separate phase control | |
DE406266C (en) | Automatic error message for measuring field devices | |
DE3330869A1 (en) | Circuit for detecting shorts to earth in the feed circuits of rotary current drives for sets of points | |
DE559270C (en) | Measuring arrangement for determining voltages | |
DE758606C (en) | Device for displaying the operating status of circuit protection devices, such as fuses, circuit breakers or the like. | |
DE607718C (en) | Device for the coordination of earth fault extinguishers, in which an artificial asymmetry of the network is brought about by a resistance earthing | |
DE352352C (en) | Device for displaying whether and in which phase of a three-phase network there is no voltage | |
DE563412C (en) | Protection circuit to detect errors in meshed networks | |
DE464097C (en) | Switching of line protection relays for three-phase current, which work depending on both the voltage and the current strength of the short-circuit circuit | |
DE494622C (en) | Circuit for checking the coordination of earth fault coils | |
DE968136C (en) | Circuit arrangement for expanding the areas of application of meter checking devices |