DE337105C - Section protection of lines with branching off - Google Patents

Section protection of lines with branching off

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Publication number
DE337105C
DE337105C DE1919337105D DE337105DD DE337105C DE 337105 C DE337105 C DE 337105C DE 1919337105 D DE1919337105 D DE 1919337105D DE 337105D D DE337105D D DE 337105DD DE 337105 C DE337105 C DE 337105C
Authority
DE
Germany
Prior art keywords
section
line
protection
auxiliary lines
switched
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
Application number
DE1919337105D
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German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WILLI PRESS
Original Assignee
WILLI PRESS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by WILLI PRESS filed Critical WILLI PRESS
Application granted granted Critical
Publication of DE337105C publication Critical patent/DE337105C/en
Expired legal-status Critical Current

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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
    • H02H3/28—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 two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
    • H02H3/30—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 two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus using pilot wires or other signalling channel
    • H02H3/305—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 two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus using pilot wires or other signalling channel involving current comparison

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electric Cable Installation (AREA)

Description

Bekannt sind Streckenschutzeinrichtungen, die auf der Gegenschaltung der Sekundärwicklungen von Stromwandlern unter Benutzung· besonderer Hilfsleitungen beruhen, derart, daß sich die E. M. Ke. der Sekundärwicklungen im normalen Betriebe in den Hilfsleitungen aufheben, im Falle eines Leitungsfehlers dagegen in den Hilfsleitung:n summieren und einen Strom in diesen hervorrufen, der die Abschalteeinrichtungen der Streckenschalter zur Auslösung bringt.Line protection devices are known which are based on the counter-circuit of the secondary windings of current transformers using special auxiliary lines, such that the E. M. Ke. of the secondary windings in normal operations in the Keep auxiliary lines, in the case of a line fault, however, in the auxiliary line: n sum up and cause a current in these, which the disconnection devices of the Line switch triggers.

Gar oft tritt in der Praxis der Fall ein, daß von einer auf diese Weise gesicherten Leitung später abgezweigt werden soll. Dann ist es erforderlich, an der Abzweigstelle zwei besondere durch Relais betätigte Schalter einzubauen, was immer außer großem Platzbedarf auch erhebliche Kosten verursacht, eine oft unerwünschte weitere selbsttätige Ausschaltstelle bedeutet, die auch eine besondere Stromquelle (meist Gleichstrom) für die Betätigung der Schalter verlangt,- mithin allerhand Wartung erfordert.In practice it is very often the case that from a line secured in this way should be branched off later. Then it is necessary to have two special ones at the junction to install switches operated by relays, which, in addition to taking up a lot of space, also causes considerable costs, an often undesired additional automatic switch-off point, which also means a special one Power source (mostly direct current) required for operating the switch - therefore all kinds of maintenance required.

Die vorliegende Neuerung gestattet, ohne diese Nachteile in Kauf nehmen zu müssen, von einer in obiger Weise geschützten Leitung abzuzweigen, ohne daß automatische Schalter zur Verwendung gelangen und der Streckenschutz aufgehoben wind.The present innovation allows, without having to accept these disadvantages, branch off from a line protected in the above manner without automatic Switch to use and the route protection is lifted.

Gemäß der Erfindung werden, wie aus Fig. ι hervorgeht, beiderseitig· von der Abzweigstelle Stromwandler N1 und N2 derart eingeschaltet, daß sich die sekundären E. M. Ke. der Stromwandler innerhalb einer Teilstrecke, also N1, M1 bzw. JV2, M2, bei normalem Betriebe aufheben, dagegen bei einem Leitungsfehler unterstützen.According to the invention, as can be seen from FIG. 1, current transformers N 1 and N 2 are switched on on both sides of the branch point in such a way that the secondary EM Ke. cancel the current transformer within a section, i.e. N 1 , M 1 or JV 2 , M 2 , during normal operation, but provide support in the event of a line fault.

Im normalen Betriebe wird daher, ungeachtet der Stromstärken, die infolge der Stromabnahme an der Abzweigstelle in den Teilstrecken verschieden groß ausfallen, die Summe der., sekundären E. M. Ke. in den Hilfsleitungen I1,12 gleich Null sein, so daß eine Einwirkung auf die am Anfang und Ende der Hauptstrecke liegenden Relais R1, R2 nicht erfolgt.In normal operation, the sum of the. be equal to zero in the auxiliary lines I 1 , 1 2 , so that the relays R 1 , R 2 located at the beginning and end of the main line are not affected.

Tritt dagegen ein Leitungsfehler auf, so fließen primär die Ströme der Fehlerstelle zu, wobei die sekundären E. M. Ke. der Stromwandler M1, M2 am Anfang und Ende der 5°' Hauptstrecke sich summieren, auf die Relais R1, R2 einwirken . und beide automatische Schalter S1, S2 der Strecke zur Auslösung bringen. ""If, on the other hand, a line fault occurs, the currents primarily flow to the fault location, with the secondary EM Ke. the current transformers M 1 , M 2 at the beginning and end of the 5 ° 'main line add up and act on the relays R 1 , R 2 . and trigger both automatic switches S 1 , S 2 of the line. ""

Wird alsdann die fehlerhafte Teilstrecke durch den zugehörigen Trennhebel P1 bzw. P2 an der Abzweigstelle abgetrennt und der Schalter der anderen Teilstrecke S2 bzw. S1 eingeschaltet, so ist diese Teilstrecke wieder geschützt, da gleichzeitig mit der Öffnung eines Trennhebels die Sekundärwicklungen der Stromwandler mittels der Kontakte JiT1 bzw. K2 verkettet bzw. in Stern geschaltet . werden.If the faulty section is then separated by the associated disconnection lever P 1 or P 2 at the branch point and the switch for the other section S 2 or S 1 is switched on, this section is protected again, since the secondary windings of the Current transformers linked or star-connected by means of contacts JiT 1 or K 2. will.

Diese Anordnung hat noch weiter die Vorteile," daß normale Stromwandler zur Verwendung gelangen und daß im Abzweig Stromwandler für den Streckenschutz oder besondere Spezialstromwandler vermieden werden.This arrangement has the further advantages of allowing normal current transformers to be used and that current transformers for line protection or special special current transformers are avoided in the branch.

Erfahrungsgemäß erdet man den Strecken-Experience has shown that the route

Claims (1)

schutz gewöhnlich nur an einer Stelle, in Fig. ι bei Relais R2. Ist nun anläßlich eines Leitungsfehlers in der Leitung L2 diese Teilstrecke durch den Trennhebel P2 und den automatischen Schalter S2 abgeschaltet, so kann die andere Teilstrecke sofort wieder in Betrieb genommen werden durch Einlegung c'es Schalters S1, da der Streckenschutz durch öffnen des Trennhebels P2 gleichzeitig mittels Kontaktplatte K2 die Sekundärwicklungen der Stromwandler JV1 in Stern schaltet, wodurch der Streckenschutz für die Teilstrecke ordnungsgemäß hergestellt wird. Würde nun bei Reparaturen usw. dlie Ableitung zur Erde bei Relais R2 aufgehoben, so würden die Hilfsleitungen I2 und damit auch I1 ungeerdet sein. Um dies zu vermeiden, ist, wie aus Fig. 2 hervorgeht, an der Kontaktplatte K2 des Trennbebeis P2 noch ein besonderer Erdungskontakt vorgesehen, so daß für alle Fälle der Streckenschutz der Teilstrecke T1, P1 geerdet ist.protection usually only at one point, in Fig. ι at relay R 2 . If, due to a line fault in the line L 2, this section is switched off by the isolating lever P 2 and the automatic switch S 2 , the other section can be put back into operation immediately by inserting the switch S 1 , as the section protection opens of the isolating lever P 2 at the same time by means of contact plate K 2 the secondary windings of the current transformer JV 1 are switched to star, whereby the route protection for the section is established properly. If, during repairs, etc., the earth conductor at relay R 2 were canceled, the auxiliary lines I 2 and thus also I 1 would be ungrounded. In order to avoid this, as can be seen from FIG. 2, a special grounding contact is provided on the contact plate K 2 of the Trennbebeis P 2 , so that the line protection of the section T 1 , P 1 is grounded in all cases. Diese Eiinrichtung kann sinngemäß für beliebige mehrphasige Leitungssysteme Verwendung finden. .This device can be used for any multiphase line system Find. . Ρλτενϊ-Anspruch: d Ρλτενϊ claim: d Streckenscbutz von Leitungen mit Stromabzweigung durch Hilfsleitungen, auf welche die sekundären Wicklungen von Stromwandlern in Gegenschaltung einwirken, dadurch gekennzeichnet, daß in der Hauptstrecke zu beiden Seiten der Stromabzweigung Stromwandler eingeschaltet sind, deren sekundäre E. M. Ke. in den Hilfsleitungen jeweils die sekundäre E. M. K. des in der zugehörigen Teilstrecke bereits vorhandenen Stromwandlers im normalen Betriebe aufheben, im Störungsfalle dagegen unterstützen, und daß ferner beim Abschalten einer fehlerhaften Teilstrecke mittels des an der Abzweigung liegenden Trennhebels die Hilfsleitungen verkettet bzw. geerdet werden, so daß die andere Teilstrecke wieder ordnungsmäßig geschützt ist.Line protection of lines with branching off through auxiliary lines, on which the secondary windings of current transformers act in counter-circuit, characterized in that in of the main line on both sides of the branching circuit, current transformers are switched on are whose secondary E.M. Ke. in each of the auxiliary lines the secondary E.M.K. of the associated Cancel part of the existing current transformer in normal operation, but provide support in the event of a fault, and that also when switching off a faulty section by means of the Branch-lying separating lever, the auxiliary lines are chained or grounded, so that the other section again is properly protected. Hierzu 1 Blatt Zeichnungen.1 sheet of drawings.
DE1919337105D 1919-09-14 1919-09-14 Section protection of lines with branching off Expired DE337105C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE337105T 1919-09-14

Publications (1)

Publication Number Publication Date
DE337105C true DE337105C (en) 1921-05-24

Family

ID=6221097

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1919337105D Expired DE337105C (en) 1919-09-14 1919-09-14 Section protection of lines with branching off

Country Status (1)

Country Link
DE (1) DE337105C (en)

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