DE730966C - Insulation monitoring and earth fault display device for three-phase systems - Google Patents
Insulation monitoring and earth fault display device for three-phase systemsInfo
- Publication number
- DE730966C DE730966C DEB189710D DEB0189710D DE730966C DE 730966 C DE730966 C DE 730966C DE B189710 D DEB189710 D DE B189710D DE B0189710 D DEB0189710 D DE B0189710D DE 730966 C DE730966 C DE 730966C
- Authority
- DE
- Germany
- Prior art keywords
- earth
- common
- phase
- resistances
- ammeter
- 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
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
- G01R27/18—Measuring resistance to earth, i.e. line to ground
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Locating Faults (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Description
Isolationsüberwachungs- und Erdschlußanzeigeeinrichtung für Drehstromanlagen Zusatz zum Patent 722 348 Die Erfindung stellt eine Verbesserung und weitere Ausbildung der im Hauptpatent beschriebenen Isolationsüberwachungs- und Erdschlußanzeigeeinrichtung für Drehstromanlagen dar.Insulation monitoring and earth fault display device for three-phase systems Addendum to Patent 722,348 The invention is an improvement and further development the insulation monitoring and earth fault display device described in the main patent for three-phase systems.
Die in dem Hauptpatent beschriebene Einrichtung besteht darin, daß mindestens eine der Phasen und ein Stempunkt über Widerstände beliebiger Phas-enlage, jedoch von etwa der gleichen Größenordnung wie die Absolutwerte der normalen komplexen Ableitungswiderstände der zu überwachenden Anlage gegen Erde in einem gemeinsamen Punkt verbunden und über ein Meßgerät oder Relais an Erde gelegt sind. Der Ausschlag des Meßgerätes dient dann zur Erfassung der Erdschlüsse und bei gesundem Netz auch als ungefähres Maß für die komplexen Ableitwiderstände der Anlage gegen Erde. The device described in the main patent is that at least one of the phases and a star point via resistors of any phase position, but of about the same order of magnitude as the absolute values of the normal complex Leakage resistances of the system to be monitored against earth in a common Point connected and connected to earth via a measuring device or relay. The rash of the measuring device is then used to record the earth faults and, if the network is healthy, also as an approximate measure of the complex leakage resistance of the system to earth.
Eine solche Einrichtung muß an einen vorhandenen oder einen künstlichen Sternpunkt angeschlossen werden. Da ein solcher nicht immer vorhanden oder umständlich herzustellen ist, wurde ein Gerät entwickelt, welches - nur an die Phasen angeschlossen wird.Such a facility must be connected to an existing one or an artificial one Connected to the star point. As such is not always present or cumbersome is to be made, a device was developed which - only connected to the phases will.
Erfindungsgemäß werden zwei der drei Phasen über Widerstände be'iebiger Phasenlage, jedoch von der ungefähren Größen. ordnung der komplexen Widerstände der Netzphasen gegen Erde in einem gemeinsamen Punkt verbunden und über einen Strommesser oder ein Relais an Erde gelegt. According to the invention, two of the three phases become more flexible via resistors Phasing, however, of approximate sizes. order of complex resistances the mains phases connected to earth at a common point and via an ammeter or a relay connected to earth.
Der beiliegende Schaltplan zeigt ein Ausführungsbeispiel des Erfindungsgegenstandes. The enclosed circuit diagram shows an exemplary embodiment of the subject matter of the invention.
Die Phasen n und v einer Drehstro-manlage sind über die kapazitiven Widerstände g und h in einem Punkt verbunden und über einen Strommesser an Erde E gelegt. Tritt ein Erdschluß der Phase u ein, so fließt ein Strom über den Strommesser und den Widerstand h zur Phase v. Ähnlich ist es bei einem Erdschluß der Phase v; hierbei fließt der Strom über den Widerstand g. Bei einem Erdschluß der Phase w fließt jedoch ein Strom über beide Widerstände und durch den Strommesser die geometrische Summe der beiden Ströme. Bei Erdschluß eines Sternpunktes der Anlage ist es ähnlich, jedoch wirkt hierbei als treibende Kraft nur die Phasenspannung der Anlage, während in den anderen Fällen die verkettete Spannung wirkte; durch geeignete Wahl der Widerstände ist es so möglich, für alle vier beschriebenen Erdschlußarten verschiedene Instrumentenausschläge zu erhalten, für die der Strommesser mit besonderen Markierungen versehen wird.The phases n and v of a three-phase system are about the capacitive Resistors g and h connected at one point and connected to earth via an ammeter E laid. If an earth fault occurs of phase u, a current flows Via the ammeter and the resistor h to phase v. It is similar with one Phase v earth fault; here the current flows through the resistor g. At a However, a current flows through both resistors and through the earth fault of phase w Ammeter the geometric sum of the two currents. In the event of a ground fault at a star point It is similar to the system, but only the phase voltage acts as the driving force the system, while in the other cases the linked voltage was at work; by A suitable choice of resistors is possible for all four types of earth faults described to get different instrument deflections for which the ammeter with special Markings is provided.
Hat das Netz einen # großen Wechselstromwiderstand gegen Erde, so zeigt der Strommesser keinen Ausschlag. Geht der symmetrische Wechselstromwiderstand je Phase gegen Erde aber nach o, so ergibt sich der gleiche Instrumentenausschlag wie bei Erdschluß eines Sternpunktes. Zwischen diesen beiden Punkten liegt der Instrumentenausschlag beim normalen Netz mit endlichem Wechselstromwiderstand gegen Erde. Aus der Größe des Instrumentenausschlages lassen sich auf letzteren Schlüsse ziehen. Unter der Annahme, daß die Wechselstromwiderstände je Phase gegen Erde ungefähr gleich sind. läßt sich eine Eichung dieses Teils der Instrumentenskala in k# Wechselstromwiderstand gegen Erde, in µF Erdkapazität oder in Kilometer Leitungslänge durchführen.If the network has a # large AC resistance to earth, then the ammeter does not show any deflection. If the symmetrical alternating current resistance goes for each phase to earth but to o, the result is the same instrument deflection as in the case of an earth fault at a star point. The instrument deflection lies between these two points in the normal network with finite alternating current resistance to earth. From the size of the instrument deflection can be drawn to the latter. Under the Assumption that the alternating current resistances per phase to earth are approximately the same. this part of the instrument scale can be calibrated in k # alternating current resistance to earth, in µF earth capacitance or in kilometers of cable length.
Läßt man durch den Strom in der gemeinsamen Erdleitung Signalgeräte für optische oder akustische Signale betätigen, so legt man dieselben praktisch an dieselben Phasen wie das Instrument, damit sie mit diesem zusammen abgeschaltet werden.If one leaves signaling devices through the current in the common earth line press for optical or acoustic signals, so you put them practically to the same phases as the instrument, so that it is switched off together with it will.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB189710D DE730966C (en) | 1940-02-01 | 1940-02-01 | Insulation monitoring and earth fault display device for three-phase systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB189710D DE730966C (en) | 1940-02-01 | 1940-02-01 | Insulation monitoring and earth fault display device for three-phase systems |
Publications (1)
Publication Number | Publication Date |
---|---|
DE730966C true DE730966C (en) | 1943-01-29 |
Family
ID=7010950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB189710D Expired DE730966C (en) | 1940-02-01 | 1940-02-01 | Insulation monitoring and earth fault display device for three-phase systems |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE730966C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE971445C (en) * | 1952-03-05 | 1959-01-29 | Licentia Gmbh | Procedure for extinguishing the earth fault arc in three-phase systems |
DE971635C (en) * | 1948-10-02 | 1959-03-05 | Walther Dipl-Ing Bender | Device for monitoring three-phase systems for ohmic conductors |
DE1094361B (en) * | 1959-06-23 | 1960-12-08 | Siemens Ag | Insulation monitoring device |
-
1940
- 1940-02-01 DE DEB189710D patent/DE730966C/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE971635C (en) * | 1948-10-02 | 1959-03-05 | Walther Dipl-Ing Bender | Device for monitoring three-phase systems for ohmic conductors |
DE971445C (en) * | 1952-03-05 | 1959-01-29 | Licentia Gmbh | Procedure for extinguishing the earth fault arc in three-phase systems |
DE1094361B (en) * | 1959-06-23 | 1960-12-08 | Siemens Ag | Insulation monitoring device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE1463767B2 (en) | ARRANGEMENT WITH A MIRROR GALVANOMETER FOR MONITORING CURRENTS IN HIGH VOLTAGE LINES | |
DE730966C (en) | Insulation monitoring and earth fault display device for three-phase systems | |
DE3031457A1 (en) | ARRANGEMENT FOR REMOTELY MONITORING THE POSITION, SPEED AND / OR DIRECTION OF THE MOVEMENT OF A MOVABLE ELEMENT | |
DE971635C (en) | Device for monitoring three-phase systems for ohmic conductors | |
DE722348C (en) | Insulation monitoring and earth fault display device for three-phase systems | |
DE923859C (en) | Device for quick determination of the fault location in electrical wiring systems | |
DE741178C (en) | Insulation monitoring and earth fault display device for three-phase systems | |
DE322357C (en) | Device for measuring winding temperatures using a resistance thermometer | |
DE868178C (en) | Rotating field direction indicator | |
DE1053099B (en) | Insulation monitoring device | |
DE895197C (en) | Device for monitoring the winding temperature of an electrical machine | |
AT118516B (en) | Method and device for monitoring high-voltage systems with earth fault extinguishers. | |
DE568069C (en) | Device for adding up the displays of measuring devices, in particular for remote totaling | |
DE453895C (en) | Method for the electrical summation of measured quantities | |
DE479788C (en) | Display device for extinguishing devices in which an artificial network earth fault is brought about | |
AT130149B (en) | Arrangement for monitoring the coordination of earth-fault release devices. | |
DE364200C (en) | Method for determining an earth resistance | |
DE521809C (en) | Arrangement for measuring the current in branch lines of high-voltage systems using measuring transformers | |
DE1089471B (en) | Insulation monitoring device | |
DE879269C (en) | Device for current, voltage and power measurement with alternating current with direct current instruments | |
DE458974C (en) | Electricity meter | |
DE737681C (en) | Device for testing voltage transformers | |
DE931187C (en) | Device for quick determination of the fault location in electrical wiring systems | |
DE623913C (en) | Device for remote measurement of electrical quantities by double transmission of the measured quantity | |
DE636571C (en) | Arrangement for integrating remote recording of continuously occurring rotary movements of a measuring device in the same direction, e.g. B. a flow meter, using zigzag curves |