EP0018553A1 - Modulschutzschalter - Google Patents

Modulschutzschalter Download PDF

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Publication number
EP0018553A1
EP0018553A1 EP80102075A EP80102075A EP0018553A1 EP 0018553 A1 EP0018553 A1 EP 0018553A1 EP 80102075 A EP80102075 A EP 80102075A EP 80102075 A EP80102075 A EP 80102075A EP 0018553 A1 EP0018553 A1 EP 0018553A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
bimetallic strip
contact
electromagnetic device
breaker according
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.)
Granted
Application number
EP80102075A
Other languages
English (en)
French (fr)
Other versions
EP0018553B1 (de
Inventor
Paul Canonne
Jean-Pierre Hattet
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.)
Societe dAppareillage Electrique SAPAREL SA
Original Assignee
Societe dAppareillage Electrique SAPAREL 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 Societe dAppareillage Electrique SAPAREL SA filed Critical Societe dAppareillage Electrique SAPAREL SA
Priority to AT80102075T priority Critical patent/ATE4356T1/de
Publication of EP0018553A1 publication Critical patent/EP0018553A1/de
Application granted granted Critical
Publication of EP0018553B1 publication Critical patent/EP0018553B1/de
Expired 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/505—Latching devices between operating and release mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/48—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having both electrothermal and electromagnetic automatic release
    • H01H73/50—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having both electrothermal and electromagnetic automatic release reset by lever
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H2071/0292—Housing or frames containing grooves or slots for guiding movable parts

Definitions

  • the present invention relates to a modular circuit breaker, in particular a low voltage circuit breaker, the wheelbase characteristics of which are standardized in order to accommodate them in suitable cabinets arranged in the walls of the dwellings.
  • circuit breaker according to the invention overcomes these drawbacks. In this one indeed the number of parts is reduced as well as the cost price for improved technical characteristics.
  • the present invention relates to a modular circuit breaker comprising in a substantially rectangular box manual and automatic tripping means, the automatic tripping means being controlled at low overload intensities by the deflection of a bimetallic strip and at higher intensities by a device electromagnetic arranged in series with deionization plates, the manual tripping means being controlled by a lever moving a movable contact serving for the disjunction and supported by a contact holder, the automatic tripping means further comprising a rotating latching cylinder under the action of said bimetallic strip or of said electromagnetic device and thus releasing said contact holder in order to move said movable contact, said deionization plates and said contact holder being arranged substantially in the direction of the diagonal of said box, characterized in that said bimetallic strip is arranged in addition according to ladi direction.
  • the cable or the current arrival bar not shown is tightened by a screw 1 and a cable clamp plate 2 on an input terminal 3 whose curved part 4 forming the plate at the higher potential comprises a contact pad 5.
  • a movable contact 6 conducts the current via a braid 7 to the end of a bimetallic strip 8, the other end 9 of which is fixed on a bimetallic strip support 10 itself fixed on a plate at lower potential 11.
  • One end 81 of the bimetal support is connected to the input of a magnetic coil 13, the output of which is connected to an output terminal 14, also comprising a cable clamp plate 15 and a clamping screw 16 allowing connection to the cable or to the current output strip.
  • Plates 17, 18, 19, 20 and 21 are so-called deionization plates intended to break up the arc at the time of cutting.
  • the electrical path diagram is modified at the time of opening on a short circuit.
  • the contact 6 moves away enough from the pad 5 the arc stretches between the contact and the pad and it is expelled in the deionization chamber by the field generated by the passage of current in the curved part 4 of the input terminal and the movable contact 6.
  • the arc leaves the movable contact and springs between the part 4 forming a plate with higher potential and the plate with lower potential 11.
  • the electronic flux then no longer crosses the bimetallic strip 8 " ; the current flows directly from the plate 4 to the plate 11 connected to the magnetic coil 13 and to the output terminal 14, until the arc is extinguished.
  • This axis 32 drives a connecting rod 34 which pulls on an axis 35 also moving in a slot 36 formed in each of the shells.
  • a contact carrier 37 On the axis 35 is articulated a contact carrier 37 whose end 38 is supported on the latching cylinder 40. The other end of the contact carrier 37 supports the movable contact 6 whose tail 42 receives the thrust of the spring 43.
  • the spring 43 performs a triple role. It allows both to ensure the contact pressure, to push the contact carrier 37 / contact 6 assembly upon opening, and finally its force causes the lever 31 to lock in the engaged position.
  • the contact 6 / contact carrier 37 assembly descends (see FIG. 3) until the domed part 51 of the contact carrier 37 touches a fixed stop 52 of the housing.
  • the length of the connecting rod 34 is such that the lever 31 is in abutment on the part 55 of the housing and maintained in this position by a torsion spring (44) having the mission of returning the lever 31 in the direction of the arrow F , a day appears between the end 38 of the contact carrier 37 and the cylinder exhaust 40. This day is necessary to release the cylinder 40 after an automatic triggering by rotation of the latter in order to allow a rearming.
  • the attachment cylinder having, under the effect of an impulse from the movable core 100 of the electromagnetic device or a thrust from the bimetallic strip 8, turned in the direction of the arrow C, the end 38 of the contact carrier, 37 is released and under the pressure of the spring 43 the contact carrier 37 / contact 6 assembly pivots about the axis 35 until the convex part 51 of the contact carrier 37 comes to bear on the fixed stop 52.
  • the traction on the connecting rod 34 having ceased, the lever 31 is driven in the direction of the arrow F by the return spring 44 whose tail can be seen on the view (torsion spring).
  • the lever returning completely back the end 38 of the contact carrier returns to be housed under the latching cylinder 40 and the device is ready again to be engaged (identical to FIG. 3).
  • This rocker 62 has a square recess 63 which makes it possible to synchronize the rockers of the neighboring poles by introducing between two poles a small square rod, each end of which is housed in the rockers of the contiguous poles, thus making them integral in rotation. Under the effect of the shock generated by the contact carrier 37 and the force exerted by the spring 43, the rocker-r of the pole just opened pivots, thus causing the rocker of the neighboring pole.
  • the protrusion 64 of the rocker 62 of the neighboring pole strikes a tooth 65 of the attachment cylinder 40 of the neighboring pole, which causes its rotation and thereby the opening of the pole.
  • the reduction in dimensions generally goes against the reduction in price.
  • the contact assembly 6, the contact carrier 37, the deionization plates 17 to 21, the bimetallic strip 8 and its support 10 are inclined, thus making it possible to benefit from maximum length for the format.
  • the deionization plates 17 to 21, all identical, are housed under the input terminal 3. They each have a V-shaped notch such as 170.
  • An electrode 110 coming from the middle of the plate at lower potential 11 penetrates into the notch in V of the plate 21.
  • the purpose of the electrode 110 is to promote the passage of the arc coming from the plate of higher potential 4 and passing through the movable contact 6 when the latter is open, to lead to the plate of lower potential 11.
  • the gases generated during a cut-off escape into an expansion chamber 71 where they must bypass or pass under a deflector 72 to finally escape through a vent 73.
  • the bimetallic strip 8 fixed at 74 on the bimetallic strip support 10 itself fixed under the deionization plates 17 to 21 has a length of 40 to 50% higher than the models currently known for the format considered.
  • the bimetallic strip deflects in the direction of arrow D. Its rounded end 75 pushes on the part 76 of the latching cylinder 40, causes its rotation and the opening of the circuit breaker.
  • the bimetallic strip supports a significant thermal stress causing its sudden displacement. If the bimetallic strip encounters an obstacle during its displacement, it results in an irreversible deformation of said bimetallic strip.
  • the attachment cylinder 40 is made of a material which promotes operation.
  • the devices must not trip for a current flow of approximately 10% greater than their nominal rating, then after one hour the current is increased up to 1.4 or 1.5 times the nominal current which should cause tripping.
  • the bimetallic strip 8 must overcome the forces essentially due to friction between the part 38 of the contact carrier 37 and the attachment cylinder 40 and also between the end 75 of the bimetallic strip and the part 76 of the cylinder.
  • the condition is fulfilled if one uses for the realization of the attachment cylinder, a material whose coefficient of friction is variable according to the temperature.
  • the temperature of the bimetallic strip increases as a function of the through current and therefore 1.1 of the nominal current the temperature is lower than 1.4 or 1.5 times the nominal current.
  • a partially thermoplastic polyester is used as a non-limiting example lens based on POLYBUTYLENETEREPHTHALATE (PBT) also designated by polytetramethylene terephthalate (PTMT) of formula C 6 H 4 [C 0 0 (CH); the desired effect is obtained.
  • PBT POLYBUTYLENETEREPHTHALATE
  • PTMT polytetramethylene terephthalate
  • the distance between the end 75 and the part 76 is adjusted by acting on a screw 79 whose head is trapped and which causes the support 10 to rise or fall.
  • the support has a weakness at 80 to favor the displacement of all.
  • the end 81 of the support 10 is connected to rigid wire forming the coil 13. It is the coil which allows the movement of the support 10 without disadvantage, the winding behaving like a spring, it allows the small displacement required for adjustment.
  • This arrangement is very advantageous in conjunction with the interior organization. It makes it possible to reduce the requirements for manufacturing the circuit breaker to a single flexible braid and to the corresponding welds.
  • the contact 6 is connected by a single braid 7 to the end 75 of the bimetallic strip 8 and the displacement of the bimetallic strip support 10 is collected by the turns of the magnetic coil 13.
  • Figure 7 shows the actual shape of the elements of the electromagnetic device.
  • FIG. 8 The view of FIG. 8 is a schematic representation intended to make the operation understand.
  • the attachment cylinder 40 comprises under a tooth 92 a non-visible stop which comes to bear downwards in an excavation made in the housing. This stop has been shown in Figure 7 by the tip 93 and the bearing triangle 94. Under the effect of the thrust of the spring 95 the control rod 96 presses on the latching cylinder 40 via a finger 97.
  • the magnetic core 100 is constantly held in abutment against the control rod 96 by a small steel wire 101 reinforced on two spans.
  • the force of the wire is just sufficient to be substantially equal to the weight of the core.
  • the only parasitic clearance f causing a delay in the control by the magnetic core is the clearance between the difference in the diameter of the pin 97 and the width of the notch E.
  • the setting of the electromagnetic device is as follows:
  • the electromagnetic device must cause the tripping of the circuit breaker for currents which can vary between 2.5 and 10 times the nominal current of the circuit breaker.
  • the operating threshold of the magnetic device is conditioned by the relative arrangement of the parts.
  • L be the length of the magnetic coil
  • L2 the middle of L
  • SG the center of gravity of the mobile magnetic core.
  • the operation varies as a function of the distances d1, d2, d3 which are respectively the distance between L2 and the upper end of the core, the gap distance, the distance between L2 and SG. Operation at different thresholds can be obtained simply by varying the length of the magnetic core 100 possibly in combination with the length of the collar 102 which forms the fixed magnetic core.
  • the number of turns of the coil can be modified.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP80102075A 1979-04-25 1980-04-18 Modulschutzschalter Expired EP0018553B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80102075T ATE4356T1 (de) 1979-04-25 1980-04-18 Modulschutzschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7910461 1979-04-25
FR7910461A FR2455355A1 (fr) 1979-04-25 1979-04-25 Perfectionnements aux disjoncteurs modulaires

Publications (2)

Publication Number Publication Date
EP0018553A1 true EP0018553A1 (de) 1980-11-12
EP0018553B1 EP0018553B1 (de) 1983-07-27

Family

ID=9224716

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80102075A Expired EP0018553B1 (de) 1979-04-25 1980-04-18 Modulschutzschalter

Country Status (11)

Country Link
EP (1) EP0018553B1 (de)
AR (1) AR222222A1 (de)
AT (1) ATE4356T1 (de)
BR (1) BR8002527A (de)
DE (1) DE3064370D1 (de)
ES (1) ES8101321A1 (de)
FR (1) FR2455355A1 (de)
MA (1) MA18810A1 (de)
PT (1) PT71150A (de)
TR (1) TR20460A (de)
ZA (1) ZA802486B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2574987A1 (fr) * 1984-12-13 1986-06-20 Telemecanique Electrique Appareil interrupteur de protection
FR2587829A1 (fr) * 1985-09-20 1987-03-27 Telemecanique Electrique Interrupteur de protection a biellette elastique
ES2147158A1 (es) * 1998-12-30 2000-08-16 Power Controls Iberica Sl Perfeccionamientos en los disyuntores automaticos de escape a tierra.
FR2943847A1 (fr) * 2009-03-31 2010-10-01 Schneider Electric Ind Sas Dispositif de declenchement thermique pour un appareil de protection electrique

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2659783A (en) * 1951-07-17 1953-11-17 Gen Electric Electric circuit breaker
GB855730A (en) * 1957-03-27 1960-12-07 Chilton Electric Products Ltd Improvements in and relating to electrical circuit-breakers
GB1094379A (en) * 1964-06-16 1967-12-13 Square D Co Venting arrangement for a circuit breaker
DE2138381A1 (de) * 1971-07-31 1973-02-08 Siemens Ag Schutzschalter, insbesondere leitungsschutzschalter
FR2152832A1 (de) * 1971-09-13 1973-04-27 Vynckier Belg Werkhuizen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2659783A (en) * 1951-07-17 1953-11-17 Gen Electric Electric circuit breaker
GB855730A (en) * 1957-03-27 1960-12-07 Chilton Electric Products Ltd Improvements in and relating to electrical circuit-breakers
GB1094379A (en) * 1964-06-16 1967-12-13 Square D Co Venting arrangement for a circuit breaker
DE2138381A1 (de) * 1971-07-31 1973-02-08 Siemens Ag Schutzschalter, insbesondere leitungsschutzschalter
FR2152832A1 (de) * 1971-09-13 1973-04-27 Vynckier Belg Werkhuizen

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2574987A1 (fr) * 1984-12-13 1986-06-20 Telemecanique Electrique Appareil interrupteur de protection
EP0188143A1 (de) * 1984-12-13 1986-07-23 Telemecanique Schutzschaltgerät
FR2587829A1 (fr) * 1985-09-20 1987-03-27 Telemecanique Electrique Interrupteur de protection a biellette elastique
EP0218497A1 (de) * 1985-09-20 1987-04-15 Telemecanique Schutzschalter mit federnder Lasche
ES2147158A1 (es) * 1998-12-30 2000-08-16 Power Controls Iberica Sl Perfeccionamientos en los disyuntores automaticos de escape a tierra.
FR2943847A1 (fr) * 2009-03-31 2010-10-01 Schneider Electric Ind Sas Dispositif de declenchement thermique pour un appareil de protection electrique
EP2237302A1 (de) * 2009-03-31 2010-10-06 Schneider Electric Industries SAS Vorrichtung zur thermischen Auslösung für elektrisches Schutzgerät
CN101853749A (zh) * 2009-03-31 2010-10-06 施耐德电器工业公司 用于电气保护设备的热脱扣装置
CN101853749B (zh) * 2009-03-31 2014-04-16 施耐德电器工业公司 用于电气保护设备的热脱扣装置

Also Published As

Publication number Publication date
BR8002527A (pt) 1980-12-09
EP0018553B1 (de) 1983-07-27
TR20460A (tr) 1981-07-23
AR222222A1 (es) 1981-04-30
PT71150A (fr) 1980-05-01
MA18810A1 (fr) 1980-12-31
DE3064370D1 (en) 1983-09-01
ATE4356T1 (de) 1983-08-15
ZA802486B (en) 1981-04-29
ES490857A0 (es) 1980-12-01
FR2455355A1 (fr) 1980-11-21
ES8101321A1 (es) 1980-12-01
FR2455355B1 (de) 1982-07-02

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