DE393720C - Arrangement for switching off parts of a network that carry earth faults - Google Patents
Arrangement for switching off parts of a network that carry earth faultsInfo
- Publication number
- DE393720C DE393720C DEV17724D DEV0017724D DE393720C DE 393720 C DE393720 C DE 393720C DE V17724 D DEV17724 D DE V17724D DE V0017724 D DEV0017724 D DE V0017724D DE 393720 C DE393720 C DE 393720C
- Authority
- DE
- Germany
- Prior art keywords
- earth
- relay
- voltage
- network
- arrangement
- 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
- Emergency Protection Circuit Devices (AREA)
- Electronic Switches (AREA)
Description
893720893720
Um bei Erdschluß im Netz diejenigen Stellen abgrenzen zu können, die der Erdschlußsteile am nächsten liegen und so die übrigen Teilte des Netzes vom Erdschluß frei zu machen, ist folgende Anordnung getroffen, bei der die Schalter einerseits von einem Stromrichtungsrelais in besonderer Schaltung überwacht werden, andererseits das Abschalten nur dann eintritt, wenn ein Spannungszeitrelais eineIn order to be able to delimit those points in the network in the event of an earth fault, which are the earth faults are closest and thus free the remaining parts of the network from the earth fault, the following arrangement is made, in which the switch is on the one hand from a direction relay monitored in a special circuit, on the other hand, the switch-off only occurs when a voltage time relay has a
ίο gewisse Zeit in Tätigkeit gewesen ist, dessen Laufzeit von dem Ansteigen der vom stärker werdenden Erdschlußstrom gleichsinnig beeinflußten Spannung abhängig ist. Hierbei wird die Stromspule des Erdstromrichtungsrelais in der bekannten Asymmetrieschaltung angewendet, während! die Spannungsspule des Erdschlußrichtungsrelais sowie des Spannungszeitrelais von der resultierenden Spannung der Phasen gegen Erde gespeist wird. Die Schaltung dieser Spannungsspulen kann in verschiedener Weise erfolgen. Sie könnten z. B. an eine Wicklung gelegt werden, die an dem vierten Schenkel einer Erdungsdrosselspule aufgesetzt ist (Abb. 1); sie könnten bei Anwendung eines in Sterndreieck geschalteten Transformators, dessen sekundäre Dreieckswicklung aufgeschnitten ist, an diesen aufgeschnittenen Punkt gelegt werden (Abb. 2); sie könnten in einer zwischen Transformator und Erde gelegten Erdungsdrosselspule sekundär gespeist werden (Abb. 3) oder könnten in Asymmetrieschaltung an der Sekundärspuk einer Erdungsdrosselspule (Abb. 4) oder anίο has been in activity for a certain time, of Running time of the increase in the same direction influenced by the increasing earth fault current Voltage is dependent. The current coil of the earth current direction relay is used in the known asymmetry circuit, while! the voltage coil of the earth fault direction relay and the voltage time relay is fed by the resulting voltage of the phases to earth. The circuit of these voltage coils can be in be done in different ways. You could e.g. B. be placed on a winding that on is placed on the fourth leg of a grounding reactor (Fig. 1); they could be at Application of a star-delta connected transformer, the secondary triangular winding of which is cut open, cut open on these Point to be placed (Fig. 2); they could be secondary in an earth choke coil placed between the transformer and earth be fed (Fig. 3) or could be asymmetrically connected to the secondary spuk a grounding reactor (Fig. 4) or on
dem Sternpunkt eines dreiphasigen Vorschaltwiderstandes liegen. In allen Fällen wird mit zunehmendem Erdschlußstrom die Spannung für die Spannungsspule des Erdstromrichtungsrelais sowie für die Spannungsspule des Spannungszeitrelais zunehmen, so daß im einen Fall festgestellt werden kann, ob Erdschlußstrom vorhanden ist, im anderen Falle aber die Abschaltung desjenigen Schalters bewirkt wird, in dem die Erdschlußspannung am höchsten ist, d. h. derjenigen Schalter, die dem Erdschluß benachbart sind.the star point of a three-phase series resistor. In all cases, with as the earth fault current increases, the voltage for the voltage coil of the earth current direction relay as well as for the voltage coil of the voltage time relay, so that in one case it can be determined whether earth fault current is present, but in the other case causes that switch to be switched off in which the earth fault voltage is highest, d. H. of those switches that are adjacent to the earth fault.
In den Abbildungen bezeichnet α das Spannungszeitrelais und b das Erdstromrichtungsrelais. In the figures, α denotes the voltage timing relay and b the earth current direction relay.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEV17724D DE393720C (en) | Arrangement for switching off parts of a network that carry earth faults |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEV17724D DE393720C (en) | Arrangement for switching off parts of a network that carry earth faults |
Publications (1)
Publication Number | Publication Date |
---|---|
DE393720C true DE393720C (en) | 1924-04-16 |
Family
ID=7576564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEV17724D Expired DE393720C (en) | Arrangement for switching off parts of a network that carry earth faults |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE393720C (en) |
-
0
- DE DEV17724D patent/DE393720C/en not_active Expired
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