DE2618397B2 - Protection circuit arrangement against overvoltages in the step section of transformers - Google Patents
Protection circuit arrangement against overvoltages in the step section of transformersInfo
- Publication number
- DE2618397B2 DE2618397B2 DE19762618397 DE2618397A DE2618397B2 DE 2618397 B2 DE2618397 B2 DE 2618397B2 DE 19762618397 DE19762618397 DE 19762618397 DE 2618397 A DE2618397 A DE 2618397A DE 2618397 B2 DE2618397 B2 DE 2618397B2
- Authority
- DE
- Germany
- Prior art keywords
- voltage
- protection circuit
- circuit arrangement
- transformers
- limiting elements
- 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.)
- Ceased
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
- H02H7/055—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers for tapped transformers or tap-changing means thereof
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Protection Of Transformers (AREA)
- Emergency Protection Circuit Devices (AREA)
- Ac-Ac Conversion (AREA)
Description
Die Erfindung betrifft eine Schutzschaltungsanordnung gegen Überspannung nach dem Oberbegriff des Anspruches 1. Eine solche Schutzschaltungsanordnung ist bekannt aus der DE-AS 10 06 512. Dort sind derartige spannungsbegrenzende Bauteile in Transformatoren mit Stufenschalteinrichtung zwischen der jeweils gewählten und vorgewählten Anzapfung eingesetzt. Dadurch werden die Stufenschalteinrichtungen von zwischen den Anzapfungen derselben Phase auftretenden Überspannungen entlastet.The invention relates to a protective circuit arrangement against overvoltage according to the preamble of claim 1. Such a protective circuit arrangement is known from DE-AS 10 06 512. There are such voltage-limiting components in transformers used with step switching device between the selected and preselected tap. As a result, the tap changers from between the taps of the same phase occurring overvoltages are relieved.
Nachteilig bei dieser Anordnung ist jedoch, daß durch diese Anordnung die zwischen Anzapfungen verschiedener Phasen auftretenden Überspannungen nur unzureichend begrenzt werden.The disadvantage of this arrangement, however, is that, due to this arrangement, the taps between taps are different Phase overvoltages that occur are only insufficiently limited.
Da somit zwischen den vorgewählten Anzapfungen verschiedener Phasen eine doppelt so hohe Beanspruchung auftreten kann wie innerhalb ein und derselben Phase bleibt der erforderliche Isolationsaufwand durch den Einsatz spannungsbegrenzender Elemente zwischen der vorgewählten und der gewählten Anzapfung derselben Phase unverändertThere is therefore twice as high a load between the preselected taps of different phases can occur as within one and the same phase, the required isolation effort remains through the use of voltage-limiting elements between the preselected and the selected tap same phase unchanged
Der Erfindung liegt die Aufgabe zugrunde, diesen Isolationsaufwand zu mindern, ohne die Funktionssicherheit des Transformators und der Stufenschalteinrichtung zu beeinträchtigen.The invention is based on the task of reducing this isolation effort without compromising functional reliability the transformer and the tap changer.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß die spannungsbegrenzenden Elemente zwischen die vorgewählten Anzapfkontakte der Stufenwicklungen ίο verschiedener Phasen eingeschaltet sind. Dabei dienen spannungsabhängige Widerstände oder Funkenstrekken mit Vorwiderständen als spannungsbegrenzende Elemente.According to the invention this object is achieved in that the voltage-limiting elements between the preselected tapping contacts of the tap windings ίο different phases are switched on. Serve thereby Voltage-dependent resistors or spark gaps with series resistors as voltage-limiting Elements.
Die Erfindung ist sehr vorteilhaft, denn sie ermöglicht den Aufbau eines Transformators bei dem auch zwisphen verschiedenen Phasen nur die gleiche Spannungsbeanspruchung auftritt wie innerhalb einer Phase. Dadurch ist die Spannungsbeanspruchung sowohl im Lastumschalter als auch in der Leitungsführung herabgesetzt.The invention is very advantageous because it enables the structure of a transformer in which only the same between different phases Stress occurs as if within a phase. This is the tension stress reduced both in the diverter switch and in the cable routing.
Ein Ausführungsbeispiel der Erfindung wird anhand einer Zeichnung näher erläutert.An embodiment of the invention is explained in more detail with reference to a drawing.
Stufen wicklungen 1, 2 und 3 der drei Phasen eines Transfoi mators haben Anzapfkontakte 7,8 bzw. 9. Eine « Lastleitung 4 ist über einen Lastschalter 13 und dessen Wählarme 10 wechselweise mit einem der Anzapfkontakte 7 der Stufenwicklung 1 verbunden. Entsprechend sind auch Lastleitungen 5 bzw. 6 über Lastschalter 14 bzw. 15 sowie Wählarme 11 bzw. 12 mit den JO Anzapfkontakten 8 bzw. 9 der Stufenwicklungen 2 bzw. 3 verbunden. Dabei ist jeweils zwischen den Wählarmen tO, 11 bzw. 12 zum Schutz des jeweils zugehörigen Lastumschalters ein nicht dargestelltes spannungsabhängiges Element angeordnet.Step windings 1, 2 and 3 of the three phases of a transformer have tap contacts 7, 8 and 9, respectively «Load line 4 is via a load switch 13 and its selector arms 10 alternately with one of the tapping contacts 7 of the step winding 1 connected. Load lines 5 and 6 are correspondingly also via load switches 14 or 15 as well as selector arms 11 or 12 with the JO tap contacts 8 or 9 of the step windings 2 or 3 connected. It is between the selector arms tO, 11 and 12 to protect the respective associated Diverter switch arranged a voltage-dependent element, not shown.
Zur weiteren spannungsmäßigen Entlastung der Schalteinrichtung sind spannungsbegrenzende Elemente 16, 17 bzw. 18 auch zwischen den Wählarmen 10, 11 bzw. 12 von verschiedenen Phasen zugeordneten Lastumschaltern vorgesehen. Die spannungsabhängigen Widerstände dieser Elemente 16, 17 und 18 sind so ausgelegt, daß die Spannungsbeanspruchung zwischen den Anzapfkontakten 7, 8 und 9 von verschiedenen Phasen zugeordneten Lastumschaltern nicht größer sind als die Spannungsbeanspruchung der Bauteile innerhalb derselben Phase.Voltage-limiting elements are used to further reduce the stress on the switching device 16, 17 and 18 also assigned between the selector arms 10, 11 and 12 of different phases Diverter switches provided. The voltage-dependent resistances of these elements 16, 17 and 18 are like this designed that the voltage stress between the tap contacts 7, 8 and 9 of different Phases assigned diverter switches are not greater than the voltage stress of the components within the same phase.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762618397 DE2618397B2 (en) | 1976-04-27 | 1976-04-27 | Protection circuit arrangement against overvoltages in the step section of transformers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762618397 DE2618397B2 (en) | 1976-04-27 | 1976-04-27 | Protection circuit arrangement against overvoltages in the step section of transformers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2618397A1 DE2618397A1 (en) | 1977-11-17 |
| DE2618397B2 true DE2618397B2 (en) | 1980-07-31 |
Family
ID=5976383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19762618397 Ceased DE2618397B2 (en) | 1976-04-27 | 1976-04-27 | Protection circuit arrangement against overvoltages in the step section of transformers |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2618397B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4111439A1 (en) * | 1991-04-09 | 1992-10-15 | Ritz Messwandler Kg | DIGITAL PROTECTIVE RELAY |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3908841A1 (en) * | 1989-03-17 | 1990-09-20 | Siemens Ag | Arrangement for damping high-frequency oscillations of an electric voltage |
-
1976
- 1976-04-27 DE DE19762618397 patent/DE2618397B2/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4111439A1 (en) * | 1991-04-09 | 1992-10-15 | Ritz Messwandler Kg | DIGITAL PROTECTIVE RELAY |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2618397A1 (en) | 1977-11-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OD | Request for examination | ||
| 8235 | Patent refused |