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EP0456586B1 - Testschaltung für einen Differentialauslöser - Google Patents

Testschaltung für einen Differentialauslöser Download PDF

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Publication number
EP0456586B1
EP0456586B1 EP91420141A EP91420141A EP0456586B1 EP 0456586 B1 EP0456586 B1 EP 0456586B1 EP 91420141 A EP91420141 A EP 91420141A EP 91420141 A EP91420141 A EP 91420141A EP 0456586 B1 EP0456586 B1 EP 0456586B1
Authority
EP
European Patent Office
Prior art keywords
test
switch
strands
strand
circuit
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 - Lifetime
Application number
EP91420141A
Other languages
English (en)
French (fr)
Other versions
EP0456586A1 (de
Inventor
Alain Bruno
Michel Lazareth
Noel Lecorre
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0456586A1 publication Critical patent/EP0456586A1/de
Application granted granted Critical
Publication of EP0456586B1 publication Critical patent/EP0456586B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
    • H01H83/04—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/02—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
    • H01H83/04—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly
    • H01H2083/045—Auxiliary switch opening testing circuit in synchronism with the main circuit

Definitions

  • Document FR-A-2,489,587 discloses a test circuit in which each of the conductive strands of the test switch and of the protective switch belongs to a separate spring. This results in a positioning of the two springs on two offset axes, with cooperation of the two strands either with the opposite terminals of the resistor, or with a metal finger.
  • the two springs are at different potentials, which imposes an appropriate isolation distance between the two springs, to the detriment of the bulk.
  • the two springs are at the same potential of the phase circuit, but the presence of the metal finger for placing the two switches in series complicates the mounting of the test circuit in the circuit breaker.
  • the object of the invention consists in simplifying the production of a test circuit for a differential trip device.
  • the test circuit according to the invention is characterized in that the first and second strands are part of the same double spring of conductive material, having two helical windings mounted coaxially on a common axis, and connected to each other by an intermediate link bearing on a fixed support of the housing.
  • Each winding of the double spring has a predetermined number of turns to define the elasticity and the specific restoring force of the corresponding strand.
  • the two strands of the spring extend in the same direction, and parallel to each other in a direction perpendicular to the axis, the interval between the two juxtaposed strands corresponding to the total length of the two windings taken along of the axis.
  • the elasticity of the double spring urges the first and second strands in the same pivoting direction, to ensure respectively the recall of the test button after opening the test switch, and the opening of the protective switch after differential triggering .
  • the presence of a double spring in the test circuit facilitates the assembly and manufacturing management of the differential trip device.
  • a single-pole neutral neutral circuit breaker 10 passing through is housed in an insulating casing 12 subdivided by a wall 14 for separation into two juxtaposed compartments.
  • the interior of the first compartment 16 is visible in FIG. 2, and includes a differential protection device 18 and the neutral circuit 20 passing, the latter being connected to a pair of terminals 22,24 for input and output of neutral. .
  • the second compartment serves as a housing for the phase circuit 26 comprising a pair of phase contacts 28, 30, a first control mechanism 32 piloted by a magnetothermal trip unit with bimetallic strip 34 and coil 36, and a pair of terminals 38.40 d 'phase input and output.
  • the first mechanism 32 can be of the type described in document FR-A-2,616,583.
  • the differential protection device 18 comprises a differential transformer 42 with toroid 44 having primary phase 45 and neutral windings 46, a measurement winding (not shown) connected to a trigger relay 48, and a second trigger mechanism 50 controlled by the relay 48 and a lever 52.
  • the second mechanism can be of the type described in the document FR-A-2.628.262.
  • the two mechanisms 32.50 are interconnected by mechanical links, authorizing an automatic tripping function of the first mechanism 32 when a differential tripping order is issued by the relay 48, and an automatic resetting function of the relay 48 by the first mechanism 32 after the differential triggering operation.
  • a test circuit 54 makes it possible to simulate a joint leakage current to cause a trip differential forced by the relay 48.
  • test button 56 intended to insert a test resistance 58 between two points 59,61 of different potentials of the phase circuit 26 and the neutral circuit 20. This insertion of the resistance 58 s operates by means of a test switch 60 actuated by the test button 56, and of a protection switch 62 associated with a pivoting transmission part 64 pivotally mounted on an axis 65 of the second mechanism 50.
  • the test circuit 54 is equipped with a double spring 66 of conductive material, having two helical windings 68.70 mounted coaxially on a common axis 71 secured to the wall 14 of the insulating housing 12.
  • the winding 68 is extended by a first elastic strand 72 of the test switch 60, while the winding 70 has a second elastic strand 74 of the protective switch 62.
  • the two strands 72,74 extend substantially parallel to each other on the same side of the axis 71, and in a direction perpendicular to the axis 71.
  • connection 76 common intermediate in the form of a half-loop bearing on a fixed support 78 of the housing 12 at a point situated on the same side of the strands 72, 74 relative to the axis 71.
  • the elasticity of the first strand 72 of the spring 66 urges the test button 56 towards the rest position, causing the opening of the test switch 60 (solid lines in FIG. 1).
  • the depressing of the test button 56 in the direction of the arrow F1 in FIG. 2 directly drives the first strand 72 towards the test position (dotted line) to come into contact with a terminal of the resistor 58.
  • the switch d test 60 remains permanently closed in the depressed position of test button 56.
  • the other terminal of the resistor is permanently connected to point 61 of neutral circuit 20.
  • the transmission part 64 cooperates with the second strand 74 of the spring 66 to keep the protective switch 62 closed (in solid lines in FIG. 1). In this position, the end of the second strand 74 is supported on an electrode 80 connected to point 59 of the phase circuit by a connecting conductor 82.
  • the circuit breaker 10 opens, and the transmission part 64 pivots around the axis 65 in a trigonometric direction (arrow F2 in FIG. 1) to authorize the displacement of the second strand 74 towards the dotted position, corresponding to the opening of the protective switch 62.
  • the two elementary strands 72,74 of the conductive spring 66 constitute the respective movable contacts of the switches 60,62 of the test circuit 54, the elasticity of each strand 72,74 being a function of the number of turns of the winding 68, 70 correspondent.
  • the first strand 72 is shaped into test contact of the switch d 'test 60, and as a return member of the test button 56 to the rest position.
  • the second strand 74 is arranged in self-interrupting contact of the protective switch 62, authorizing the automatic interruption of the test circuit 54 after differential tripping, even if the test switch 60 remains closed during prolonged holding of the button test 56 in the depressed position.
  • the elasticity of the spring 66 urges the two elementary strands 72,74 in the same direction of pivoting thanks to the reaction of the intermediate link 76 on the fixed support 78.
  • the windings 68.70 can have a different number of turns depending on the requirement of the specific restoring forces of the strands 72.74.
  • test switch 60 When the circuit breaker 10 is tripped, the test switch 60 is open, and the protection switch closed. Test circuit 54 is permanently interrupted, and no current flows in resistor 58 and in spring 66. The two windings 68, 70 of the latter are found at the potential of point 59 associated with the phase circuit.
  • test button 56 To perform a differential test, simply press the test button 56 in the direction of the arrow F1, which closes the test switch 60, and activates the test circuit 54 by the potential difference present between the points 59 and 61. The leakage current passing through the resistor 58 is detected by the toroid 44, causing a differential trip by the relay 48. The test circuit 54 is then interrupted by automatic opening of the protection switch 62. The release of the test button 56 causes it to return to the rest position under the elastic effect of the first strand 72.
  • the second mechanism 50 is reset by pivoting the handle 52 to the right (FIG. 2) causing the protective switch 62 to close again.
  • test circuit 54 is also applicable to a modular differential circuit breaker with neutral cut, and to a one-piece differential switch. In the latter case, the differential protection device relay acts directly on the switch control mechanism.

Landscapes

  • Breakers (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Investigating Or Analysing Biological Materials (AREA)

Claims (6)

  1. Prüfstromkreis für einen Fehlerstromauslöser einer Fehlerstrom-Schutzeinrichtung, insbesondere eines Leistungsschalters (10) oder Schutzschalters, der aus folgenden Teilen besteht:
    - einem Prüfwiderstand (58), der mit einem Prüfkontakt (60) und einem Schutzkontakt (62) zwischen zwei Punkten (59, 61) unterschiedlichen Potentials in Reihe geschaltet ist,
    - einer Prüftaste (56), die zum Schließen des Prüfkontakts (60) in eine Prüfstellung gebracht werden kann,
    - einem ersten, als Prüfkontaktarm des Prüfkontakts (60) ausgeführten leitenden Federschenkel (72) sowie einem elastischen Rücksteller zur Beaufschlagung der Prüftaste (56) in Richtung einer Ruhestellung,
    - und einem zweiten, als automatischer Abschaltkontaktarm des Schutzkontakts (62) ausgeführten leitenden Federschenkel (74), der mit einem Übertragungselement (64) des Schaltmechanismus' (50) des Fehlerstromauslösers zusammenwirkt, dadurch gekennzeichnet, daß der erste und der zweite Federschenkel (72, 74) zur gleichen leitend ausgeführten Doppelfeder (66) mit zwei koaxial auf einer gemeinsamen Achse (71) montierten Spiralen gehören, die über ein auf einer festen Auflage (78) des Gehäuses (12) abgestütztes Zwischenstück (76) miteinander verbunden sind.
  2. Prüfstromkreis nach Anspruch 1, dadurch gekennzeichnet, daß jede Spirale (68, 70) der Doppelfeder (66) eine bestimmte Anzahl von Windungen aufweist, durch die die Elastizität und die Rückstellkraft des zugehörigen Federschenkels (72, 74) bestimmt werden.
  3. Prüfstromkreis nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die beiden Schenkel (72, 74) der Feder (66) parallel zueinander und senkrecht zur Achse (71) in der gleichen Richtung angeordnet sind, wobei der Abstand zwischen den beiden nebeneinanderliegenden Schenkeln (72, 74) in Richtung der Achse (71) gesehen der Gesamtlänge der beiden Spiralen (68, 70) entspricht.
  4. Prüfstromkreis nach Anspruch 3, dadurch gekennzeichnet, daß die Spannkraft der Doppelfeder (66) im gleichen Drehsinn auf den ersten und zweiten Schenkel (72, 74) wirkt, um nach dem Öffnen des Prüfkontakts (60) die Rückführung der Prüftaste (56) bzw. nach einer Fehlerstromauslösung die Öffnung des Schutzkontakts (62) zu gewährleisten.
  5. Prüfstromkreis nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der erste Schenkel (72) in der Prüfstellung der Prüftaste (56) mit einem Anschlußende des Widerstands (58) zusammenwirkt, wobei das gegenüberliegende Anschlußende des Widerstands (58) ununterbrochen mit einem der Punkte (61), insbesondere des Neutralleiterkreises (20) verbunden ist, und daß der zweite Schenkel (74) beim Einschalten des Leistungsschalters (10) in Anlage an eine Elektrode (80) gelangt, die über einen Verbindungsleiter (82) mit dem anderen Punkt (59), insbesondere des Phasenleiterkreises verbunden ist.
  6. Prüfstromkreis nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Zwischenstück (76) der Feder (66) als bügelförmiger Leiterpfad ausgeführt ist und die Reihenschaltung der beiden Spiralen (68, 70) erlaubt, wobei der Abstützpunkt des Zwischenstücks (76) auf der Auflage (78) bezogen auf die Achse (71) auf der gleichen Seite der Schenkel (72, 74) angeordnet ist.
EP91420141A 1990-05-10 1991-04-29 Testschaltung für einen Differentialauslöser Expired - Lifetime EP0456586B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9006550 1990-05-10
FR9006550A FR2662019B1 (fr) 1990-05-10 1990-05-10 Circuit test pour un declencheur differentiel.

Publications (2)

Publication Number Publication Date
EP0456586A1 EP0456586A1 (de) 1991-11-13
EP0456586B1 true EP0456586B1 (de) 1994-10-19

Family

ID=9396962

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91420141A Expired - Lifetime EP0456586B1 (de) 1990-05-10 1991-04-29 Testschaltung für einen Differentialauslöser

Country Status (5)

Country Link
EP (1) EP0456586B1 (de)
AT (1) ATE113140T1 (de)
DE (1) DE69104647T2 (de)
ES (1) ES2065654T3 (de)
FR (1) FR2662019B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004005985A1 (de) * 2004-02-06 2005-09-08 Siemens Ag Fehlerstromschutzschaltvorrichtung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3032826C2 (de) * 1980-08-30 1985-11-07 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Fehlerstromschutzschalter mit einer Prüftaste zum Einschalten eines Widerstandes in einen Prüfstromkreis
ES285200Y (es) * 1985-03-08 1986-05-01 Electrotecnica F. De Roda, S.A. Mejoras introducidas en los mecanismos de interruptores di- ferenciales para acoplamiento en o a interruptores automati-cos
AT384906B (de) * 1985-12-02 1988-01-25 Felten & Guilleaume Ag Oester Fehlerstrom- und leitungsschutzschalter
IT1223520B (it) * 1987-12-17 1990-09-19 Elettrocondutture Dispositivo per lo sgancio dei contatti di interruttori differenziali

Also Published As

Publication number Publication date
DE69104647D1 (de) 1994-11-24
EP0456586A1 (de) 1991-11-13
DE69104647T2 (de) 1995-05-11
FR2662019B1 (fr) 1992-07-24
ATE113140T1 (de) 1994-11-15
FR2662019A1 (fr) 1991-11-15
ES2065654T3 (es) 1995-02-16

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