DE2542852B1 - Faulty current protective circuit breaker - has summation transformer with additional short circuit winding with specified resistance - Google Patents

Faulty current protective circuit breaker - has summation transformer with additional short circuit winding with specified resistance

Info

Publication number
DE2542852B1
DE2542852B1 DE19752542852 DE2542852A DE2542852B1 DE 2542852 B1 DE2542852 B1 DE 2542852B1 DE 19752542852 DE19752542852 DE 19752542852 DE 2542852 A DE2542852 A DE 2542852A DE 2542852 B1 DE2542852 B1 DE 2542852B1
Authority
DE
Germany
Prior art keywords
winding
circuit breaker
current
summation
residual current
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
Application number
DE19752542852
Other languages
German (de)
Other versions
DE2542852A1 (en
Inventor
Hans Englmaier
Reinhard Solleder
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE19752542852 priority Critical patent/DE2542852B1/en
Publication of DE2542852A1 publication Critical patent/DE2542852A1/de
Publication of DE2542852B1 publication Critical patent/DE2542852B1/en
Priority to JP11531776A priority patent/JPS5241877A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26Emergency 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
    • H02H3/32Emergency 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
    • H02H3/34Emergency 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
    • H02H3/347Emergency 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 using summation current transformers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/14Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
    • H01H83/144Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection with differential transformer

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Breakers (AREA)

Abstract

The automatic protective circuit breaker for faulty currents has a summation current transformer whose care carries a secondary coil which is connected to the excitation winding of a tripping device, affecting the switch lock. The core carries a second winding with a specified resistance value. This additional winding is in the form of a short circuit coil (20), whose resistance value is matched to the tripping current. The assembly enables the employment of summation current transformer with a high secondary output. The tripping device (11) acts upon the switch lock (12) via a coupling rod (14). A testing circuit (16) with a testing push-button (15) complete the assembly.

Description

Durch Aufbringen einer Kurzschlußwindung, deren Widerstandswert den Gegebenheiten entsprechend einmal ausgewählt wurde, kann man in einfacher Weise auch Summenstromwandler mit zu hoher sekund&rseitiger Leistung verwenden und das Auslöseverhalten des Fehlerstromschutzschalters leicht in den Toleranzbereich vom 0,5fachen bis t,Ofachen des Nennfehlerstnmes verlegen. Die Kurzschlußwindung 20 wirkt hierbei dämpfend, indem sie bei einem Magnetfeld, das von einem Fehlerstrom erregt wird, einen Strom fahrt, dessen Feld dem vom Fehlerstrom verursachten Magnetfeld entgegenwirkt. By applying a short-circuit winding whose resistance value the Once selected, you can do this in a simple manner also use summation current transformers with too high secondary power and the tripping behavior of the residual current circuit breaker is slightly within the tolerance range from 0.5 times to t, times the nominal error rate. The short-circuit winding 20 has a dampening effect by being in the event of a magnetic field generated by a fault current is excited, a current travels whose field corresponds to the magnetic field caused by the fault current counteracts.

Claims (1)

Patentanspruch: Fehlerstromschutzschalter mit einem Summenstromwandler, auf dessen Kern eine Sekundärwicklung angeordnet ist, die mit der Erregerwicklung eines auf ein Schaltschloß einwirkenden Auslösers in Verbindung steht, sowie mit einer weiteren, auf dem Kern angeordneten Wicklung mit einem Widerstandswert, dadurch gekennzeichnet, daß die zusätzliche Wicklung als Kurzschlußwindung (20) mit einem dem Auslösestrom angepaßten Widerstandswert ausgebildet ist. Claim: Residual current circuit breaker with a summation current transformer, a secondary winding is arranged on its core, which is connected to the excitation winding a trigger acting on a switch lock is in connection, as well as with a further winding arranged on the core with a resistance value, thereby characterized in that the additional winding as a short-circuit winding (20) with a the tripping current adapted resistance is formed. Die Erfindung bezieht sich auf einen Fehlerstromschutzschalter gemäß dem Oberbegriff des Anspruchs. The invention relates to a residual current circuit breaker according to the preamble of the claim. Ein derartiger Fehlerstromschutzschalter ist aus der DT-AS 23 36 260 bekannt. Beim bekannten Fehlerstromschutzschalter wird der Kreis der zusätzlichen Wicklung durch eine Antiparallelschaltung von Dioden und gegebenenfalls durch einen LC-Widerstand in Parallelschaltung vervollständigt. Dadurch soll das Ansprechen des Auslösers bei kurzzeitigen kapazitiven Strömen hoher Frequenz vermieden werden. In dem Bereich, in dem der Auslöser anspricht, bleibt die zusätzliche Wicklung ausgeschaltet.Such a residual current circuit breaker is from DT-AS 23 36 260 known. In the case of the well-known residual current circuit breaker, the circuit of the additional Winding by an anti-parallel connection of diodes and possibly by one LC resistor in parallel connection completed. This is intended to respond of the release with brief capacitive currents of high frequency can be avoided. In the area in which the release responds, the additional winding remains switched off. Um Fehlerstromschutzschalter mit verschiedenen Nennfehlerstromstärken zu erzielen, sind Haltemagnete mit unterschiedlicher Auslöseleistung erforderlich. Damit die Summenstromwandler bei einer bestimmten, vom Fehlerstrom verursachten Primärerregung sekundärseitig die für den Haltemagneten zur Auslösung benötigte Leistung jeweils abgeben können, ist der Summenstromwandler so zu fertigen, daß ein Mindestgarantiewert in der Induktions-Feldstärke-Kurve erfüllt wird. Ein oberer Grenzwert wird üblicherweise nicht vorgeschrieben, da sich die Summenstromwandler sonst in der Herstellung wesentlich verteuern würden. To residual current circuit breakers with different nominal residual currents To achieve this, holding magnets with different release powers are required. So that the summation current transformer at a certain, caused by the fault current Primary excitation on the secondary side that required for the holding magnet to trigger Can deliver power, the summation current transformer is to be manufactured in such a way that a minimum guaranteed value in the induction field strength curve is met. A top one Limit value is usually not prescribed because the summation current transformer would otherwise make them much more expensive to manufacture. In der Zulieferung von Summenstromwandlern für die Fertigung von Fehlerstromschutzschaltern findet man häufig Summenstromwandler, deren dem Mindestgarantiewert zugeordnete Feldstärke im oberen Induktionsbereich weit überschritten wird. Solche Summenstromwandler geben sekundärseitig bei einer bestimmten Primärerregung eine wesentlich höhere Leistung ab, so daß ein Fehlerstromschutzschalter, der mit einem solchen Summenstromwandler bestückt ist und ein serienmäßiges Haltemagnetsystem als Auslöser aufweist, bereits unter dem 0,Sfachen Nennfehlerstrom auslöst, was den Vorschriften widerspricht. Bisher sah man sich daher genötigt, den Auslöser entsprechend zu justieren, so daß der Fehlerstromschutzschalter im vorgeschriebenen Bereich zwischen dem 0,5fachen und dem l,0fachen Nennfehlerstrom auslöst. Auch beim bekannten, eingangs beschriebenen Fehlerstromschutzschalter, sind solche zusätzlichen Maßnahmen erforderlich. In the supply of summation current transformers for the production of Residual current circuit breakers can often be found summation current transformers whose minimum guaranteed value assigned field strength in the upper induction range is far exceeded. Such Summation current transformers give a on the secondary side at a certain primary excitation significantly higher power, so that a residual current circuit breaker with a such a summation current transformer is equipped and a standard holding magnet system as a trigger, triggers below 0. S times the nominal fault current, which contravenes the regulations. So far one has therefore felt compelled to release the trigger to adjust accordingly, so that the residual current circuit breaker is in the prescribed Range between 0.5 times and 1.0 times the nominal residual current trips. Also at known residual current circuit breaker described above, are such additional Measures required. Der Erfindung liegt die Aufgabe zugrunde, die Fertigung von Fehlerstromschutzschaltern wesentlich zu vereinfachen, indem auch Summenstromwandler mit zu hoher Sekundärleistung in den normalen Fertigungsablauf einfacher als bisher einbezogen werden können, indem man mit Auslösern jeweils einer bestimmten Leistung auskommt. The invention is based on the object of manufacturing residual current circuit breakers to simplify significantly by including summation current transformers with too high secondary power can be included in the normal production process more easily than before, by making do with triggers for a specific performance. Diese Aufgabe wird erfindungsgemäß durch eine Ausbildung nach den kennzeichnenden Merkmalen des Anspruchs gelöst. Man kann Windungen und Widerstandswert der Kurzschlußwindung in einfacher Weise so wählen, daß berücksichtigte maximale Sekundãrleistungen von Summenstromwandlern in den üblichen Toleranzbereich verlegt werden. Die zusätzliche Wicklung bleibt durch den ohmschen Widerstand ständig kurz geschlossen. Diese Kurzschlußwindung bleibt also gerade beim Ansprechen des Auslösers eingeschaltet. This object is achieved according to the invention by training according to the characterizing features of the claim solved. One can have turns and resistance value choose the short-circuit winding in a simple manner so that the maximum taken into account Secondary powers of summation current transformers relocated in the usual tolerance range will. The additional winding remains constantly short due to the ohmic resistance closed. This short-circuit winding therefore remains just when the trigger responds switched on. Dadurch ist sichergestellt, daß Summenstromwandler mit zu hoher Sekundärleistung in den normalen Fertigungsablauf einbezogen werden können. This ensures that summation current transformers with too high a secondary power can be included in the normal production process. Die Erfindung soll an Hand eines in der Zeichnung grob schematisch wiedergegebenen Ausführungsbeispiels näher erläutert werden. Es zeigt F i g. 1 die wesentlichen Elemente eines Fehlerstromschutzschalters, F i g. 2 den auslösenden Fehlerstrom in Abhängigkeit vom Widerstandswert der Kurzschlußwindung. The invention is intended to be roughly schematic based on one of the drawings reproduced embodiment will be explained in more detail. It shows F i g. 1 the essential elements of a residual current circuit breaker, F i g. 2 the triggering one Fault current as a function of the resistance value of the short-circuit winding. Der Fehlerstromschutzschalter nach F i g. 1 weist einen Summenstromwandler 1 mit einem Kern 2 mit Primärwicklungen 3 auf. Die Primärwicklungen sind eingangsseitig mit einem Nulleiter 4a sowie Phasenleitern Sa, 6a und 7a verbunden. Ausgangsseitig führt der Nulleiter zu einem Anschluß 4b und die Phasenleiter zu Anschlüssen 5b, 6b und 7b. Schaltkontakte sind mit 8 bezeichnet. Auf dem Kern 2 des Summenstromwandlers list eine Sekundärwicklung 9 angeordnet, die mit einer Erregerwicklung 10 eines Auslösers 11 in Verbindung steht. Der Auslöser wirkt mittels einer Kopplungsstange 14 auf ein Schaltschloß 12 zum Entklinken ein, wodurch die Schaltkontakte 8 geöffnet werden. Mit dem Schaltschloß 12 arbeitet auch ein Handbetätigungsorgan 13 zusammen. The residual current circuit breaker according to FIG. 1 has a summation current transformer 1 with a core 2 with primary windings 3. The primary windings are on the input side connected to a neutral conductor 4a and phase conductors Sa, 6a and 7a. Output side the neutral conductor leads to a connection 4b and the phase conductors to connections 5b, 6b and 7b. Switching contacts are denoted by 8. On core 2 of the summation current transformer list a secondary winding 9 is arranged, which is connected to an excitation winding 10 of a Trigger 11 is in communication. The trigger works by means of a coupling rod 14 to a switch lock 12 for unlatching, whereby the switching contacts 8 open will. A manual control element 13 also works together with the switch lock 12. Ein Prüfstromkreis mit einer Prüftaste 15 ist mit 16 bezeichnet. A test circuit with a test button 15 is denoted by 16. Auf dem Kern 2 des Summenstromwandlers 1 ist zusätzlich eine Kurzschlußwindung 20 mit einem Widerstandswert angeordnet Die Kurzschlußwindung 20 nach F i g. 1 verändert in Abhängigkeit von ihrem Widerstandswert den Auslösestrom nach der in F i g. 2 angegebenen Weise. Auf der Ordinate ist dort der Auslösestrom in Milliampere und auf der Abszisse der Wert des Widerstandes der Kurzschlußwindung in Ohm aufgetragen. Bei kleinen Widerstandswerten wirkt sich die Wahl des WIderstandswertes hinsichtlich der Veränderung des Auslöser stromes wesentlich stärker als bei großen Widerstandswerten aus. Im Diagramm nach F i g. 2 wird von einem Nennfehlerstrom von 500 mA ausgegangen. On the core 2 of the summation current transformer 1 there is also a short-circuit winding 20 arranged with a resistance value The short-circuit winding 20 according to FIG. 1 changed depending on its resistance value, the tripping current according to the one shown in FIG. 2 specified way. On the ordinate there is the tripping current in milliamps and the value of the resistance of the short-circuit winding in ohms is plotted on the abscissa. In the case of small resistance values, the choice of resistance value affects the change in the release current is much greater than with large resistance values the end. In the diagram according to FIG. 2 a nominal residual current of 500 mA is assumed.
DE19752542852 1975-09-25 1975-09-25 Faulty current protective circuit breaker - has summation transformer with additional short circuit winding with specified resistance Pending DE2542852B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19752542852 DE2542852B1 (en) 1975-09-25 1975-09-25 Faulty current protective circuit breaker - has summation transformer with additional short circuit winding with specified resistance
JP11531776A JPS5241877A (en) 1975-09-25 1976-09-25 Leakage breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752542852 DE2542852B1 (en) 1975-09-25 1975-09-25 Faulty current protective circuit breaker - has summation transformer with additional short circuit winding with specified resistance

Publications (2)

Publication Number Publication Date
DE2542852A1 DE2542852A1 (en) 1976-09-16
DE2542852B1 true DE2542852B1 (en) 1976-09-16

Family

ID=5957437

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19752542852 Pending DE2542852B1 (en) 1975-09-25 1975-09-25 Faulty current protective circuit breaker - has summation transformer with additional short circuit winding with specified resistance

Country Status (2)

Country Link
JP (1) JPS5241877A (en)
DE (1) DE2542852B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2616600A1 (en) * 1987-06-09 1988-12-16 Bassani Spa ELECTRIC MAGNETOTHERMIC AND DIFFERENTIAL PROTECTION APPARATUS
AT520576A3 (en) * 2017-09-29 2020-02-15 Siemens Ag Residual Current Device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT372549B (en) * 1980-04-16 1983-10-25 Felten & Guilleaume Ag Oester Fault current protection switch without summation current transformer
US5509194A (en) * 1995-01-17 1996-04-23 The Whitaker Corporation Power crimping tool for tape feed products

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2616600A1 (en) * 1987-06-09 1988-12-16 Bassani Spa ELECTRIC MAGNETOTHERMIC AND DIFFERENTIAL PROTECTION APPARATUS
AT520576A3 (en) * 2017-09-29 2020-02-15 Siemens Ag Residual Current Device

Also Published As

Publication number Publication date
DE2542852A1 (en) 1976-09-16
JPS5241877A (en) 1977-03-31

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Legal Events

Date Code Title Description
B1 Publication of the examined application without previous publication of unexamined application