DE492440C - Earth fault protection device with three current transformers in summation circuit - Google Patents
Earth fault protection device with three current transformers in summation circuitInfo
- Publication number
- DE492440C DE492440C DES81090D DES0081090D DE492440C DE 492440 C DE492440 C DE 492440C DE S81090 D DES81090 D DE S81090D DE S0081090 D DES0081090 D DE S0081090D DE 492440 C DE492440 C DE 492440C
- Authority
- DE
- Germany
- Prior art keywords
- generator
- current
- earth fault
- voltage
- coil
- 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
-
- 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
- H02H3/42—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 product of voltage and current
- H02H3/422—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 product of voltage and current using homopolar quantities
Landscapes
- Control Of Eletrric Generators (AREA)
- Protection Of Generators And Motors (AREA)
Description
Erdschluß-Schutzeinrichtung mit drei Stromwandlern in Summenschaltung Die Erfindung bezweckt bei einem Erdsc:hluß oder Gestellschluß von Generatoren mit oder ohne Netzanschluß ein Anzeigen dieses Vorganges oder die Abschaltung der Maschine. Liegt der Generator ohne Dazwischenschaltung eines Transformators direkt an den Sammelschienen, an denen noch weitere Generatoren parallel liegen, so müssen besondere Anordnungen getroffen werden, am bei dem Erdschluß eines Generators, der zu andere. Generatoren parallel lmagt, ein selektives Ausschalten dieses Generators zu bewirken.Earth fault protection device with three current transformers in summation circuit The invention aims at a ground connection or frame connection of generators with or without a mains connection, this process is displayed or the machine is switched off. If the generator is connected directly to the Busbars on which other generators are connected in parallel must be special Arrangements are made on at the ground fault of one generator leading to another. Generators in parallel is able to selectively switch off this generator.
Die Endschluß-Schutzeinrichtung besteht aus drei Stromwandlern in Summenschaltung, ferner einem zwischen Nullpunkt des Generators und Erde geschalteten Spannungswandler und einem Wattmeterrelais. Der Hauptschalter jedes Generators ist nach der Erfindung außerdem, mit einer Schaltvorrichtung gekuppelt, die bei eingeschaltetem Schal.-ter die Stromspule des Wattmeterrelais an die Stromwandler und die Spannungsspule des Wattnveters an den Spannungswandler im Nullpunkt des Generators legt. Bei geöffnetem Schalter ,dagegen sind Spannungsspule und Stromspule des Wattmeterrelais an den Spannungswandler im Nullpunkt des Generators gelegt.The final circuit protection device consists of three current transformers in Summation circuit, also one connected between the zero point of the generator and earth Voltage converter and a wattmeter relay. The main switch of each generator is according to the invention also, coupled with a switching device that is switched on Switch the current coil of the wattmeter relay to the current transformer and the voltage coil of the wattmeter to the voltage converter in the zero point of the generator. When the Switch, on the other hand, are the voltage coil and current coil of the wattmeter relay to the Voltage transformer placed in the generator's zero point.
Ein Au§führungsbeispmel der Erfindung ist in der Zeichnung veranschaulicht. Abb. i zeigt die Schaltung bei geschlossenem, Abb.2 de Schaltung bei geöffnetem Hauptschalter.An embodiment of the invention is illustrated in the drawing. Fig. I shows the circuit with the closed, Fig.2 de circuit with the open Main switch.
Die drei Phasenwicklungen 2, 3, q. des Generators i liegen über die Stromwandler 5, 6, 7 und den Hauptschalter 8 an dem Sammelschienensystem 9. Der Nullpunkt io des "Generators ist über -den Spannungswandler i i geerdet. Der Hauptschalter 8 ist in mechanischer Verbindung mit der S:chaltvdrrichtung 12. Die Stromspule. 13 des Relais 15 liegt über die Schaltvorrichtung 12 an den Stromwandlern 5, 6, 7 und die Spannungsspule i¢ an dem Spannungswandler i i.The three phase windings 2, 3, q. of the generator i are connected to the busbar system 9 via the current transformers 5, 6, 7 and the main switch 8. The zero point io of the "generator is grounded via the voltage transformer ii. The main switch 8 is in mechanical connection with the switching device 12. The 1 3 of the relay 1 5 is connected to the current converters 5, 6, 7 via the switching device 12 and the voltage coil i ¢ to the voltage converter i i.
Die Wirkungsweise der Anordnung ist folgende: Liegt der =Generator i bei geschlossenem Hauptschalter parallel an dem Sammelschienensystem 9 und tritt jetzt ein Erdschluß am Generator i auf, so kommt damit der Spannungswandler i i unter Spannung, und es fließt ein Strom, durch die Spannungsspule i¢ des Wattmeterrelais 15. Infolge des Erdschlusses sind aber die drei in den Strom--wand] ern 5, 6, 7 fließenden Ströme nicht mehr gleich groß und um i2o° Phasen verschoben, so daß sich jetzt ein Summenstrom ergibt, .der durch die Stromspule 13 des WattmeterreJais 15 fließt. Das Wattmeterrelais 15 tritt also in Tätigkeit. Tritt dagegen ein Erdschluß im Netz oder an einem anderen Generator auf, so tritt wohl auch der Spannungswandler wieder unter Spannung, und es fließt ein Strom durch die Spannungsspule; aber es tritt keine wesentliche Vieränderung und Verschiebung der drei Ph,asensträme auf, so daß durch die Stromspule des Wattmeterrelais kein Strom fließt. Das Wattmeterrelais bleibt also in Ruhe.The mode of operation of the arrangement is as follows: If the = generator is located i with the main switch closed, parallel to the busbar system 9 and occurs if a ground fault occurs at generator i, voltage converter i i under voltage, and a current flows through the voltage coil i ¢ of the wattmeter relay 15. As a result of the earth fault, however, the three in the current wall are 5, 6, 7 flowing currents are no longer the same size and shifted by i2o ° phases, so that now results in a total current, .through the current coil 13 of the wattmeter relay 15 flows. The wattmeter relay 15 thus comes into operation. If, however, an earth fault occurs in the network or on another generator occurs, so also occurs the voltage converter is energized again and a current flows through the voltage coil; but there is no substantial change in the four and a shift in the three phasal streams so that no current flows through the current coil of the wattmeter relay. The wattmeter relay so stay calm.
Isst der Hauptschalter 8 geöffnet und tritt jetzt ein Erdschluß ,am Generator z auf, so kommt der Spannungswandler wieder unter Spannung und schickt jetzt einen Strom durch :die Spannungsspule und über die Schaltvorrichtung i z durch die Stromspule des WattmeterreIais 15. Das Wattmeterrelais 15 tritt ebenfalls wieder in Tätigkeit. In beiden Fällen 'bewirkt -der Kontakt .des wattmetrischen Relais ein Signalisieren des Dedekbes bzw. ein Abschalten des Generators vom Netz.If the main switch 8 is open and there is now an earth fault, on Generator z on, the voltage converter comes under voltage again and sends now a current through: the voltage coil and through the switching device i z the current coil of the wattmeter relay 15. The wattmeter relay 15 also occurs again in action. In both cases, the contact of the wattmetric relay causes a signaling of the dedekbe or a disconnection of the generator from the network.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES81090D DE492440C (en) | 1927-08-07 | 1927-08-07 | Earth fault protection device with three current transformers in summation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DES81090D DE492440C (en) | 1927-08-07 | 1927-08-07 | Earth fault protection device with three current transformers in summation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE492440C true DE492440C (en) | 1930-02-21 |
Family
ID=7509330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DES81090D Expired DE492440C (en) | 1927-08-07 | 1927-08-07 | Earth fault protection device with three current transformers in summation circuit |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE492440C (en) |
-
1927
- 1927-08-07 DE DES81090D patent/DE492440C/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE492440C (en) | Earth fault protection device with three current transformers in summation circuit | |
| DE683965C (en) | Protective device for electrical lines | |
| DE2448635A1 (en) | DEVICE FOR TORQUE LIMITING IN A TURBINE GENERATOR SHAFT | |
| DE756927C (en) | Arrangement for tempering contact converters | |
| DE765251C (en) | Selective protection device for electrical lines | |
| DE557528C (en) | Cascade voltage transformer arrangement for connecting an earth fault indicator for multi-phase, especially three-phase systems | |
| DE670766C (en) | Earth fault protection device | |
| DE420710C (en) | Circuit for protecting generators against earth faults | |
| DE480049C (en) | Relay circuit for protecting parallel AC lines, in which the secondary coils of current transformers are connected to form a polygon | |
| DE569794C (en) | Arrangement for coupling two busbar systems of a high-voltage switchgear | |
| DE736927C (en) | Multi-phase relay based on the Ferraris principle | |
| DE616482C (en) | Overcurrent protection device for at least three line systems colliding at a junction with transformers in the junction | |
| DE919182C (en) | Three-phase transformer or choke with isolated zero point and auxiliary winding connected in an open triangle with a crossover connected to it | |
| DE444644C (en) | Protection system for two parallel lines in AC systems | |
| DE683217C (en) | Arrangement for monitoring fuses in high-voltage networks, especially for three-phase networks | |
| DE691022C (en) | Excitation device for selective protection circuits | |
| DE927939C (en) | Excitation device for selective protection relays in networks with a directly earthed star point | |
| DE469831C (en) | Arrangement for selective protection for double lines | |
| AT160061B (en) | Protection circuit for n-phase systems. | |
| DE949503C (en) | Interturn protection device | |
| DE622209C (en) | Relay built in the manner of an induction motor | |
| AT95472B (en) | Circuit arrangement of the overcurrent protection of more than two parallel lines. | |
| DE410008C (en) | Circuit for relay with current and voltage winding in alternating current networks | |
| DE611476C (en) | Protection circuit with resistance-dependent selective time relays | |
| DE463421C (en) | Device for the selective disconnection of faulty line sections in networks with switching relays, the tripping times of which are staggered |