DE1096472B - Monitoring device for the phase voltage to protect three-phase systems - Google Patents
Monitoring device for the phase voltage to protect three-phase systemsInfo
- Publication number
- DE1096472B DE1096472B DEV15650A DEV0015650A DE1096472B DE 1096472 B DE1096472 B DE 1096472B DE V15650 A DEV15650 A DE V15650A DE V0015650 A DEV0015650 A DE V0015650A DE 1096472 B DE1096472 B DE 1096472B
- Authority
- DE
- Germany
- Prior art keywords
- phase
- voltage
- protect
- monitoring device
- thyratron
- 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.)
- Pending
Links
Classifications
-
- 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
- H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/34—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
- H02H3/353—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system involving comparison of phase voltages
Landscapes
- Protection Of Static Devices (AREA)
Description
Überwachungseinrichtung für die Phasenspannung zum Schutz von Drehstromanlagen Es ist bekannt, zum Schutz von Drehstromanlagen gegen Ausfall der Spannung einer Phase Relais bzw. Relaiskombinationen in verschiedenartigen Anordnungen sowie Dreipunktschaltungen zu verwenden. Ebenso ist bekannt, daß bei Drehstromnetzen, die mit Transformatoren; oder Motoren belastet sind, bei Ausfall einer Phase Rückspannungen bis zu 90%. der Nennspannnung auftreten, so daß eine Phasenspannungskontrolle mit Hilfe von Relaiskombinationen keinen Schutz bietet. Nach bekanntgewordenen Anordnungen verwendet man zur Erhöhung der Sicherheit derartiger Überwachungseinrichtungen Stabilisatoren, die in die Relaiszweige geschaltet werden, und erreicht somit eine Abfallsicherheit von 60% der Phas,en-Nennspannung. DieseAnordnungensind j edoch beispielsweise bei leer laufenden Motoren mit einer Rückspannung bis 90% der Nennspannung unwirksam.Monitoring device for the phase voltage to protect three-phase systems It is known to protect three-phase systems against failure of the voltage Phase relays or relay combinations in various arrangements as well as three-point circuits to use. It is also known that in three-phase networks with transformers; or motors are loaded, in the event of a phase failure, reverse voltages of up to 90%. the Nominal voltage occur, so that a phase voltage control with the help of relay combinations offers no protection. According to arrangements that have become known, it is used to increase the safety of such monitoring devices stabilizers, which are in the relay branches can be switched, and thus achieves a fail-safe protection of 60% of the nominal phase voltage. However, these arrangements are, for example, with idling engines with a Reverse voltage ineffective up to 90% of the nominal voltage.
Auch bekannte Fehlerstromschutzschaltungen mit elektronischem Schalter sind für eine Kontrolle der Phasenspannung bei Ausfall einer Phase nicht geeignet, da sie nur im Falle einer Berührungsspannung ansprechen, und zwar indem das Thyratron erst bei auftretender Berührungsspannung zündet und über ein Relais den Schalter auslöst.Also known residual current protection circuits with electronic switches are not suitable for checking the phase voltage in the event of a phase failure, since they only respond in the event of a contact voltage, namely by the thyratron Only when contact voltage occurs does the switch ignite and via a relay triggers.
Die Erfindung hat den Zweck, eine überwachungseinrichtung für die Phasenspannung zum Schutz von Drehstromanlagen bei Ausfall oder Veränderung der Spannung einer oder zweier Phasen zu schaffen, die den Forderungen ,gerecht wird und die Nachteile der vorgenannten Anordnungen beseitigt.The invention has the purpose of a monitoring device for the Phase voltage to protect three-phase systems in the event of failure or change in the To create tension of one or two phases that meet the demands and eliminates the disadvantages of the aforementioned arrangements.
Die Aufgabe wird dadurch gelöst, daß an eine bekannte Netzsternschaltung aus drei Widerständen, die im Knotenpunkt vereinigt sind, parallel zu einem Kondensator über einen Gleichrichter ein Widerstand zwischen Sternpunkt und Mittelpunktsleiter angeschlossen ist, der als Ableitungswiderstand des Steuergitters eines Thyratrons dient, in dessen Anodenstromkreis ein. Relais angeordnet ist.The object is achieved in that a known network star connection of three resistors, which are combined in the junction, in parallel with a capacitor A resistor between the neutral point and the neutral conductor via a rectifier is connected, as the leakage resistance of the control grid of a thyratron is used in its anode circuit. Relay is arranged.
Eine Beschreibung der Erfindung soll an Hand der Zeichnung erfolgen.A description of the invention is to be made with reference to the drawing.
Die Abbildung zeigt mit 1, 2, 3 die in bekannter Weise in Stern geschalteten Widerstände; mit 4 ist ein in der Mitte des Sternes gegenüber dem Kondensator 8 angeschlossener Widerstand bezeichnet, dem ein Gleichrichter 7 vorgeschaltet ist. 5 stellt ein Thyratron dar, in dessen Anodenstromkreis ein Relais 6 angeordnet ist.The figure shows with 1, 2, 3 the star-connected in a known manner Resistances; with 4 is a in the middle of the star opposite the capacitor 8 denotes connected resistor, which is preceded by a rectifier 7. 5 shows a thyratron, in the anode circuit of which a relay 6 is arranged.
Die Wirkungsweise der Schaltung ist folgende: Im Normalbetrieb ist die Summe aller Ströme der Widerstände 1, 2, 3 im Sternpunkt gleich Null. Bei Ausfall oder Veränderung der Spannung einer oder zweier Phasen tritt ein Stromfluß vom Sternpunkt über den Widerstand 4 nach Mp auf, der einen Spannungsabfall am Widerstand 4 auslöst. Das im ungestörten Betrieb von R über Relais 6 nach Mp gezündete Thyratron 5 wird durch den am Widerstand 4 entstehenden Spannungsabfall, der durch einen vorgeschalteten Gleichrichter 7 und nachfolgendem Kondensator 8 am Steuergitter der Röhre einen negativen Wert aufweist, gesperrt. Mit Erlöschen des Thyratrons wird das Relais 6 zum Abfallen gebracht.The mode of operation of the circuit is as follows: In normal operation is the sum of all currents of the resistors 1, 2, 3 at the star point is zero. In the event of failure or change in the voltage of one or two phases, a current flows from the neutral point via resistor 4 to Mp, which triggers a voltage drop across resistor 4. The thyratron 5, which is ignited in undisturbed operation from R via relay 6 to Mp, becomes due to the voltage drop occurring at the resistor 4, which is caused by an upstream Rectifier 7 and subsequent capacitor 8 on the control grid of the tube has a negative value, locked. When the thyratron goes out, the relay becomes 6 brought to fall.
Die erfindungsgemäße Schaltung ermöglicht eine einwandfreie Kontrolle der Phasenspannung, die unabhängig von der Höhe der Rückspannung von der Nennspannung wirksam bleibt.The circuit according to the invention enables perfect control the phase voltage, which is independent of the level of the reverse voltage from the nominal voltage remains effective.
Im Rahmen des Erfindungsgedankens kann die Überwachungseinrichtung durch geringfügige Schaltungsänderungen auch mit einem Transistor oder einer Elektronenröhre betrieben werden.Within the scope of the inventive concept, the monitoring device by making slight changes to the circuit, also with a transistor or an electron tube operate.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEV15650A DE1096472B (en) | 1958-12-20 | 1958-12-20 | Monitoring device for the phase voltage to protect three-phase systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEV15650A DE1096472B (en) | 1958-12-20 | 1958-12-20 | Monitoring device for the phase voltage to protect three-phase systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1096472B true DE1096472B (en) | 1961-01-05 |
Family
ID=7575147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEV15650A Pending DE1096472B (en) | 1958-12-20 | 1958-12-20 | Monitoring device for the phase voltage to protect three-phase systems |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1096472B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1298610B (en) * | 1963-11-05 | 1969-07-03 | Bott Aloys | Switching arrangement for monitoring the phase and neutral voltage of three-phase lines |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR32532E (en) * | 1926-11-12 | 1928-01-24 | Proux Ets | Warning device eliminating the risk of damage in three-phase asynchronous motors |
| US1908835A (en) * | 1930-08-09 | 1933-05-16 | Earl R Evans | Protective apparatus for electrical systems |
| US2122107A (en) * | 1935-02-05 | 1938-06-28 | Meller | Protecting three-phase apparatus |
| DE714701C (en) * | 1939-11-01 | 1941-12-04 | Siemens Ag | Arrangement for triggering a switch in single-phase operation of consumers in three-phase networks |
| US2551610A (en) * | 1942-08-14 | 1951-05-08 | Int Standard Electric Corp | Protection of three-phase motors |
| AT169519B (en) * | 1949-12-29 | 1951-11-26 | Siemens Schuckertwerke Gmbh | Arrangement for the protection of multi-phase consumers, especially three-phase machines |
| AT170207B (en) * | 1951-01-10 | 1952-01-25 | Hans Wascher | Phase protection for small consumers |
| DE1016813B (en) * | 1952-03-15 | 1957-10-03 | Gen Electric | Thermal motor protection switch for multi-phase motors |
-
1958
- 1958-12-20 DE DEV15650A patent/DE1096472B/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR32532E (en) * | 1926-11-12 | 1928-01-24 | Proux Ets | Warning device eliminating the risk of damage in three-phase asynchronous motors |
| US1908835A (en) * | 1930-08-09 | 1933-05-16 | Earl R Evans | Protective apparatus for electrical systems |
| US2122107A (en) * | 1935-02-05 | 1938-06-28 | Meller | Protecting three-phase apparatus |
| DE714701C (en) * | 1939-11-01 | 1941-12-04 | Siemens Ag | Arrangement for triggering a switch in single-phase operation of consumers in three-phase networks |
| US2551610A (en) * | 1942-08-14 | 1951-05-08 | Int Standard Electric Corp | Protection of three-phase motors |
| AT169519B (en) * | 1949-12-29 | 1951-11-26 | Siemens Schuckertwerke Gmbh | Arrangement for the protection of multi-phase consumers, especially three-phase machines |
| AT170207B (en) * | 1951-01-10 | 1952-01-25 | Hans Wascher | Phase protection for small consumers |
| DE1016813B (en) * | 1952-03-15 | 1957-10-03 | Gen Electric | Thermal motor protection switch for multi-phase motors |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1298610B (en) * | 1963-11-05 | 1969-07-03 | Bott Aloys | Switching arrangement for monitoring the phase and neutral voltage of three-phase lines |
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