EP0023277A1 - Dispositif de protection sélective - Google Patents

Dispositif de protection sélective Download PDF

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Publication number
EP0023277A1
EP0023277A1 EP80103715A EP80103715A EP0023277A1 EP 0023277 A1 EP0023277 A1 EP 0023277A1 EP 80103715 A EP80103715 A EP 80103715A EP 80103715 A EP80103715 A EP 80103715A EP 0023277 A1 EP0023277 A1 EP 0023277A1
Authority
EP
European Patent Office
Prior art keywords
coil
current
short
circuit
parallel
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.)
Withdrawn
Application number
EP80103715A
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German (de)
English (en)
Inventor
Klaus Dipl.-Ing. Greefe
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.)
BBC Brown Boveri AG Germany
Original Assignee
BBC Brown Boveri AG Germany
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 BBC Brown Boveri AG Germany filed Critical BBC Brown Boveri AG Germany
Publication of EP0023277A1 publication Critical patent/EP0023277A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/1081—Modifications for selective or back-up protection; Correlation between feeder and branch circuit breaker

Definitions

  • the invention relates to a selective protection device for the selective disconnection of consumers, optionally with an upstream main fuse, at least one main circuit breaker in series with this and connected downstream with a first tripping characteristic, with at least one circuit breaker assigned to a consumer group with a second tripping characteristic below the first tripping characteristic is located, wherein the main line protection switch in its current path has a separation point, which can be opened by a percussion armature upon the occurrence of an overcurrent or short-circuit current, a thermal release and a switching device, which upon occurrence of a short-circuit current the current at least partially provided on a agnetauslöser with a M Parallel branch switches which parallel branch when a certain one passes Parallel branch current triggers a switch lock through the coil of the magnetic release, which finally opens the disconnection point, and the switching device has an auxiliary disconnection point, which is opened mechanically and / or electrically when the separation point is opened and commutates the current on the parallel branch with the coil.
  • circuit breakers For overcurrent and short-circuit current protection, in addition to fuses, circuit breakers have been used more and more frequently in the past, which have a thermal release for tripping in the event of an overcurrent and a magnetic release for tripping in the event of a short-circuit current.
  • a bimetal is usually used as a thermal trigger, which bends when an overcurrent occurs, thereby unlatching the switching mechanism and thus separating the movable contact piece from the fixed contact piece.
  • This thermal release is a so-called delayed release because it only responds to an overcurrent due to the heating up after a certain time.
  • a magnetic armature system is provided as the magnetic trigger, which responds practically without delay and without delay opens the contact point or unlatches the switch lock.
  • a self-switch In a first application, it can be connected downstream of a back-up fuse, whereby its triggering in the event of a short circuit in front of or on the consumer must take place in such a way that the back-up fuse does not respond either in the overcurrent range or in the short-circuit current range. With the triggers currently customary, it can generally be achieved that an automatic device is "selective" against a fuse whose rated current is two steps higher than that of the circuit breaker. There is now the possibility (see FIG. 1) of using the circuit breaker or the circuit breaker as the main circuit breaker between the back-up fuse and a group of downstream circuit breakers as group protection, meter protection automatic device or the like.
  • DOS 2 525 192 to assign a trigger control and a quick opening device for the contacts to each switch, the opening device being designed in such a way that it quickly opens the switch contacts through which the overcurrent flows at the various stages. It is designed so that it enables the contacts to be switched on again quickly when the current value falls below a predetermined value.
  • the trip control has a counter which counts the successive opening and closing sequences of the contacts and which can trigger after a predetermined number of sequences, so as to keep the contacts of the corresponding switch open after the predetermined number of sequences. This means that the switch that is directly assigned to the consumer; after a single opening, the higher-order switch remains open after opening twice and the higher-order switch remains open after three times, and so on.
  • the switch that is closest to the feed point of the circuit is set for the highest number of sequences and therefore also opens most frequently.
  • This arrangement is undoubtedly relatively complicated, and the lifespan of the switches closest to the infeed is also reduced, since under certain conditions they also Occurrence of a short circuit several times, for example five times on or off.
  • due to the inertia of the individual switch elements there may be too much stress on the endangered or defective line, since the short circuit remains on the line for a long time, even if it is switched off again and again.
  • the object of the invention is therefore to provide a switch of the type mentioned, in which this is avoided.
  • This object is achieved in that the response time of the magnetic release with the coil in the parallel branch is greater than that of the magnetic release of the circuit breakers assigned to the consumers and at least as long as the opening time of the disconnection point in the main current path, and that a voltage-dependent resistor parallel to the coil of the parallel branch is switched.
  • a further embodiment of the invention can consist in that a second coil is connected in parallel to a resistance element in the main current path, which acts on the armature of the coil in the parallel branch, and that diodes are arranged in an anti-parallel manner in the one feed line to the second coil.
  • This arrangement has the advantage that part of the short-circuit current is conducted into the second coil in parallel to the resistance element in the main current path when the short circuit is so high that the voltage drop across the resistance element is greater than the threshold voltage of the diodes connected in parallel.
  • the response value of the second trigger coil can be set as desired.
  • the main line circuit breaker responds in any case at high and very high short-circuit currents, the selectivity being realized to a sufficient extent.
  • the second coil can be connected in parallel to the bimetal in the main current path serving as a resistance element, which means that the arrangement is also simplified in any case.
  • FIG. 1 A mains transformer 10 can be seen, to which a back-up fuse 12 and a main circuit breaker 14 are connected.
  • the electrical line in which the three components are located and which is designated by reference number 16 branches in the circuit distribution at point 18, for example into a first branch 20 and a second branch 22, the first branch 20 being a circuit breaker 24 and a consumer 28, a circuit breaker 26 and a consumer 30 are arranged in the second branch 22. If an embodiment according to the invention is used as the main circuit breaker, then a pass characteristic is obtained, as shown in FIG. 2.
  • the characteristic curve Kl4 is composed of an area AK 14T assigned to the thermobimetal of the main line circuit breaker 14 and an area AK 14MA which is assigned to the magnetic release of the main line circuit breaker .
  • the main current path 16 can be seen, in which an impact armature system 32 is located, of which only the impact armature coil is shown.
  • An auxiliary separation point 34 can also be seen, as well as a main separation point 36 lying in series with the auxiliary separation point 34.
  • a thermobimetal 38 is in series with the coil 32, the auxiliary separation point 34 and the main separation point 36. However, this can also be done connected in parallel to the coil 32 or arranged at another point in the main current path.
  • the switching device which is designed in accordance with the previously registered patent ... (patent application P 28 54 616.9), is implemented by the auxiliary disconnection point 34.
  • a first coil 40 is provided with an impact anchor, not shown, which is symbolized by the arrow 42 and acts on a key switch 44.
  • a varistor 46 is parallel to the first coil 40 and a resistor 48 is connected to the parallel circuit varistor 46 and coil 40.
  • the entire tripping device, which is designated by the reference number 50, is connected in parallel to the auxiliary isolating point 38.
  • a second coil 52 is connected in parallel to the bimetallic 38 and, as indicated in FIG. 3, acts on the impact anchor, which cooperates with the coil 40.
  • Diodes 56 connected in anti-parallel are inserted in one path 54 to the second coil 52.
  • the broken lines 58, 60, 62, 64, 66 and 68 show lines of action which act on the switching mechanism 44 and the two separation points 34 and 36 '.
  • the second coil 52 must not act parallel to one of the two separation points 34 and 36.
  • the bimetallic metal 38 acts on the switching mechanism 44 via the line of action 58 and on the two separation points 34 and 36 via the line of action 60.
  • the main coil 32 acts on the two separation points 34 and 36 via the line of action 64 and 66 or 68.
  • the function of this arrangement without the second coil 52 is similar to the function of the circuit Fig. 8 of the patent ... (patent application P 28 54 616.9). In the following, therefore, only the mode of operation of the second coil 52 will be discussed.
  • the impact anchor system with the coil 40 is designed such that in addition to a minimum current level, a minimum time for triggering is required, which is due to the inertia of the impact anchor.
  • T 1 The time required for a short circuit in area A to trip is indicated by T 1 . This time is not sufficient to trigger the main circuit breaker, while the time T 2 is sufficient to trigger it in the event of a short circuit in area B.
  • the current through the tripping coil 40 is dependent on the arc voltage across the contact 34.
  • the arc voltage can fluctuate greatly in the event of small short-circuit currents, and for this reason the voltage-dependent resistor 46 is also connected in parallel with the tripping coil 40 and switches through above a certain voltage value and then its resistance decreases, so that above this A n vide- the voltage drop voltage across the parallel circuit of the coil 40 and the resistance remains constant 46th This also means that the current through the coil 40 remains constant above this limit.
  • the response limit is placed in the vicinity of the smallest occurring arc voltage. In this way, the fluctuations in the arc voltage can be made insensitive to the trip coil 40.
  • the response value of the second coil 52 can be adjusted as desired and the diodes additionally achieve that in the short-circuit current range as for short-circuits at location A (FIG. 1), the trip coil 40 is not influenced by the coil 52, since the diodes are not activated due to the voltage drop being too small and thus block the line 70.
  • Current-time diagrams of the short-circuit current namely the first half-wave of the short-circuit current
  • 4a shows the short-circuit current as it flows through the main line current path when a short-circuit occurs in area A.
  • the unlimited short circuit current I KUA is not limited short-circuit current
  • the short-circuit current I KBA the limited short-circuit current, which is limited by the fact that in addition to the opening and tripping of the circuit breaker 24 of the main circuit breaker 14 opens strombe- g renzend.
  • the short circuit value I KUmax is an average short circuit value .
  • the current flowing through the main circuit breaker, ie the already limited current I KBA flows through it during the time T 1 '.
  • the time period T 1 is less than the tripping time T a of the main circuit breaker.
  • the curve I KBU has the unlimited short-circuit current, whereas the limited short-circuit current is designated I KBB .
  • the length of time that the short-circuit current flows is designated T 2 .
  • the current flowing through the coil is again i s p 40B and it flows, starting from the time t 40 during the time period T 2 , wherein T 2 is somewhat smaller than T 2 '. The following applies: T 1 ⁇ T a ⁇ T 2 .
  • the main circuit breaker 14 thus trips.

Landscapes

  • Emergency Protection Circuit Devices (AREA)
EP80103715A 1979-07-31 1980-07-01 Dispositif de protection sélective Withdrawn EP0023277A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792930960 DE2930960A1 (de) 1979-07-31 1979-07-31 Selektivschutzeinrichtung
DE2930960 1979-07-31

Publications (1)

Publication Number Publication Date
EP0023277A1 true EP0023277A1 (fr) 1981-02-04

Family

ID=6077201

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80103715A Withdrawn EP0023277A1 (fr) 1979-07-31 1980-07-01 Dispositif de protection sélective

Country Status (3)

Country Link
EP (1) EP0023277A1 (fr)
JP (1) JPS5622520A (fr)
DE (1) DE2930960A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3133200A1 (de) * 1981-08-21 1983-03-03 Siemens AG, 1000 Berlin und 8000 München Leitungsschutzschalter, geeignet als vorautomat
EP0347787A2 (fr) * 1988-06-22 1989-12-27 HAGER ELECTRO GmbH Disjoncteur de protection pour courant de surcharge et court-circuit
EP0350824A2 (fr) * 1988-07-15 1990-01-17 Asea Brown Boveri Aktiengesellschaft Dispositif de protection sélective contre la surintensité
EP0474186A2 (fr) * 1990-09-03 1992-03-11 Hitachi, Ltd. Procédé et dispositif pour la protection d'un réseau électrique
DE102006037230A1 (de) * 2006-08-09 2008-02-14 Siemens Ag Schalteinrichtung zum selektiven Abschalten mit einer induktiven Auslöseeinheit
CN102623268A (zh) * 2011-01-26 2012-08-01 北京人民电器厂有限公司 具有选择性保护的断路器
WO2013154505A1 (fr) * 2012-04-12 2013-10-17 Razvojni Center Enem Novi Materiali D.O.O. Interrupteur de protection de circuit électrique contre la surcharge

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61103889A (ja) * 1984-10-24 1986-05-22 Hayashibara Biochem Lab Inc 結晶エルロ−ス及びそれを含有する含蜜結晶並びにそれらの製造方法及び用途
DE3526226A1 (de) * 1985-07-23 1987-01-29 Geyer Gmbh & Co Christian Leitungsschutzeinrichtung
DE10349907A1 (de) * 2003-10-25 2005-05-25 Abb Patent Gmbh Elektrischer Leitungsschutzschalter
CN100413171C (zh) * 2005-12-08 2008-08-20 Tcl低压电器(无锡)有限公司 区域选择性连锁装置
CN105576624B (zh) * 2016-02-02 2019-07-12 国家电网公司 换流站交流场中开关联锁逻辑的实现方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE943841C (de) * 1940-09-19 1956-06-01 Aeg Einrichtung zum Aus- und Wiedereinschalten von durch einen Zeitstaffelschutz ueberwachten elektrischen Leitungen
DE2008086A1 (de) * 1969-02-24 1970-10-08 General Electric Company, Schenectady, N.Y. (V.St.A.) Elektrisches Energieverteilungssystern
DE2503523A1 (de) * 1974-03-18 1975-09-25 Gen Electric Wechselstrom-leistungsversorgungssystem
DE2854616A1 (de) * 1978-12-18 1980-06-19 Bbc Brown Boveri & Cie Selektivschutzeinrichtung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2255730B1 (fr) * 1973-12-20 1977-06-10 Merlin Gerin

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE943841C (de) * 1940-09-19 1956-06-01 Aeg Einrichtung zum Aus- und Wiedereinschalten von durch einen Zeitstaffelschutz ueberwachten elektrischen Leitungen
DE2008086A1 (de) * 1969-02-24 1970-10-08 General Electric Company, Schenectady, N.Y. (V.St.A.) Elektrisches Energieverteilungssystern
DE2503523A1 (de) * 1974-03-18 1975-09-25 Gen Electric Wechselstrom-leistungsversorgungssystem
DE2854616A1 (de) * 1978-12-18 1980-06-19 Bbc Brown Boveri & Cie Selektivschutzeinrichtung

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3133200A1 (de) * 1981-08-21 1983-03-03 Siemens AG, 1000 Berlin und 8000 München Leitungsschutzschalter, geeignet als vorautomat
DE3133200C2 (fr) * 1981-08-21 1990-11-08 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De
EP0347787A2 (fr) * 1988-06-22 1989-12-27 HAGER ELECTRO GmbH Disjoncteur de protection pour courant de surcharge et court-circuit
EP0347787A3 (fr) * 1988-06-22 1991-07-10 HAGER ELECTRO GmbH Disjoncteur de protection pour courant de surcharge et court-circuit
EP0350824A2 (fr) * 1988-07-15 1990-01-17 Asea Brown Boveri Aktiengesellschaft Dispositif de protection sélective contre la surintensité
EP0350824A3 (fr) * 1988-07-15 1991-07-17 Asea Brown Boveri Aktiengesellschaft Dispositif de protection sélective contre la surintensité
EP0474186A2 (fr) * 1990-09-03 1992-03-11 Hitachi, Ltd. Procédé et dispositif pour la protection d'un réseau électrique
EP0474186A3 (en) * 1990-09-03 1993-01-13 Hitachi, Ltd. Method of and device for protecting electrical power system
US5305174A (en) * 1990-09-03 1994-04-19 Hitachi, Ltd. Method of and device for protecting electrical power system
DE102006037230A1 (de) * 2006-08-09 2008-02-14 Siemens Ag Schalteinrichtung zum selektiven Abschalten mit einer induktiven Auslöseeinheit
CN102623268A (zh) * 2011-01-26 2012-08-01 北京人民电器厂有限公司 具有选择性保护的断路器
WO2013154505A1 (fr) * 2012-04-12 2013-10-17 Razvojni Center Enem Novi Materiali D.O.O. Interrupteur de protection de circuit électrique contre la surcharge
CN104364872A (zh) * 2012-04-12 2015-02-18 瑞兹沃基尼中心艾恩艾姆诺维材料公司 用于避免电路过载的开关
US9275816B2 (en) 2012-04-12 2016-03-01 Ravojni Center Enem Novi Materiali D.O.O. Switch for protection of electric circuit against overloading
CN104364872B (zh) * 2012-04-12 2016-08-24 瑞兹沃基尼中心艾恩艾姆诺维材料公司 用于避免电路过载的开关

Also Published As

Publication number Publication date
JPS5622520A (en) 1981-03-03
DE2930960A1 (de) 1981-02-19
DE2930960C2 (fr) 1988-03-24

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Inventor name: GREEFE, KLAUS, DIPL.-ING.