EP0038291A1 - Mécanisme d'actionnement par moteur pour interrupteur de protection basse tension - Google Patents

Mécanisme d'actionnement par moteur pour interrupteur de protection basse tension Download PDF

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Publication number
EP0038291A1
EP0038291A1 EP19810730041 EP81730041A EP0038291A1 EP 0038291 A1 EP0038291 A1 EP 0038291A1 EP 19810730041 EP19810730041 EP 19810730041 EP 81730041 A EP81730041 A EP 81730041A EP 0038291 A1 EP0038291 A1 EP 0038291A1
Authority
EP
European Patent Office
Prior art keywords
slide
support plate
motor drive
circuit breaker
actuating handle
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
EP19810730041
Other languages
German (de)
English (en)
Other versions
EP0038291B1 (fr
Inventor
Gerd Dr. Kummerow
Werner Troebel
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
Publication of EP0038291A1 publication Critical patent/EP0038291A1/fr
Application granted granted Critical
Publication of EP0038291B1 publication Critical patent/EP0038291B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
    • 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
    • H01H71/66—Power reset mechanisms
    • H01H71/70—Power reset mechanisms actuated by electric motor
    • 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
    • H01H71/56—Manual reset mechanisms which may be also used for manual release actuated by rotatable knob or wheel
    • H01H2071/565—Manual reset mechanisms which may be also used for manual release actuated by rotatable knob or wheel using a add on unit, e.g. a separate rotary actuator unit, mounted on lever actuated circuit breakers
    • 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
    • H01H71/66—Power reset mechanisms
    • H01H2071/665—Power reset mechanisms the reset mechanism operating directly on the normal manual operator, e.g. electromagnet pushes manual release lever back into "ON" position

Definitions

  • the invention relates to a motor drive for low-voltage circuit breakers with an actuating handle and with a support plate fastened to the housing of the circuit breaker for a slide which engages over the actuating handle with a window-like opening and which can be driven to and fro.
  • a motor drive of this type is known from US-PS 33 28 731.
  • the slide is in linear contact with the flanks of the actuating handle in order to keep the surface pressure on the actuating handle consisting of a plastic low.
  • it means a considerable effort in the manufacture of the slide, a shape and surface quality of the surfaces of the slide which come into contact with the actuating handle of the circuit breaker that the actuating handle is not damaged even with frequent use by the slide.
  • This has already led to the fact that in a front rotary drive the rocker arm has been provided with a roller which interacts with other rollers of a swivel lever (US Pat. No. 3,752,947).
  • the invention has for its object to provide a motor drive suitable for higher actuation forces for low-voltage circuit breakers, which does not require any special adjustment or retrofitting of the normal switch during installation, which can also be produced from simple parts and in particular the problem of overstressing the actuation handle avoids.
  • this object is achieved in a motor drive of the type mentioned in that a cylindrical body which surrounds the end of the actuating handle is arranged between the actuating handle and the opening of the slider, the cylinder axis of which runs parallel to the plane of the slider and which runs through a guide track is secured against radial escape.
  • the cylindrical body is inexpensive to produce as a molded or molded plastic part.
  • An advantageous assignment of the slide, the support plate and the guide track can be achieved in that the slide is guided on the side of the support plate facing the actuating handle and the guide track is molded into the support plate.
  • the support plate and the guideway can be made in one piece.
  • FIG. 1 shows a longitudinal section through a motor drive along the line I-I in FIG. 2.
  • FIG. 2 is a view of the motor drive in the direction of arrow II in FIG. 1.
  • FIG. 3 shows the motor drive in a section along the line III-III in FIG. 1.
  • FIG. 4 shows a cross section along the line IV-IV in FIG. 1.
  • FIG. 5 A detail of the connection of the circuit breaker to the motor drive is shown in FIG. 5.
  • FIG. 6 shows a detail of the attachment of a cap to a support plate of the motor drive.
  • FIG. 7 shows a rotary handle for manual operation of the motor drive in emergencies.
  • the circuit breaker 1 shows the outline of a low-voltage circuit breaker 1 belonging to the design of the compact switch in the version with an insulating material housing and a rocker arm drive.
  • the circuit breaker 1 comprises a housing 2, the upper part of which is offset by a step 3 each and which has a central elevation 4 which surrounds an actuating handle 5. This is placed on a rocker arm 6, which is pivotable about a pivot bearing 7. The remaining components of the circuit breaker 1 are not shown.
  • a raised label 10 (FIG. 5) is attached, which extends almost to the edge of the upper part 23 of the housing 2.
  • a lateral bend 11 of a support plate 12 made of sheet metal, which also runs there, is provided with a recess 13, while the opposite bend 14 (FIG. 4) is designed without a recess. Therefore, the support plate 12 can only be attached to the circuit breaker in the position shown, but not in a position rotated by 180.
  • the support plate 12 is also provided with angle pieces 15 and 16 which are transverse to its longitudinal direction and have legs 17 and 18 with recesses 20 and 21 resting on the upper part of the housing 2.
  • the recesses are intended for the passage of screws 22, which not only attach the support plate 12 to the housing of the circuit breaker 1, but also connect the upper part 23 and the lower part 24 of the circuit breaker 1 (FIG. 5). Instead of welded angles molded angles or spacers can also be used.
  • the support plate 12 is part of a motor drive designated as a whole by 25.
  • a total of four guide tabs 26 are pressed out of the surface lying parallel to the front side of the circuit breaker 1 and engage around a slide 27 at its edges and thereby guide it longitudinally displaceably on the support plate 12, as is indicated by a double arrow 30 in FIGS. 1 and 2.
  • the slide 27 has a window-like opening 28 from which two tabs 31 perpendicular to the longitudinal extension of the slide 27 are pressed out at right angles. Between these tabs 31 there is a cylindrical body 32 consisting of a plastic, the cylinder axis of which lies parallel to the plane of the slide 27 and the axis of the pivot bearing 7 of the rocker arm 6.
  • the cylindrical body 32 has a recess, the shape of which corresponds to the end of the actuating handle 5, so that the cylindrical body 32 can be pushed onto the actuating handle 5.
  • the areal contact between the cylindrical body 32 and the actuating handle 5 ensures a low specific stress on the material of the actuating handle.
  • the cylindrical body 32 is flattened on its surfaces which do not come into contact with the tabs 31 during the switching operations.
  • the upper flattened area 33 is opposite a guide track 34, which is pressed out on the support plate 12 by a punching process. It can be seen from FIG. 2 that elongated openings 35 are present on both sides of the guideway 34. These are first punched out of the support plate 12 in order then to be able to form the remaining strips in such a way that the guideway is formed with a radius corresponding to the distance between the pivot bearing 7 and the rocker arm 6.
  • a motor gear is also on the support plate 12 Unit 36 is arranged, wherein a motor 37 is arranged with an axis parallel to the support plate 12 and the gear 38 with a perpendicular to the support plate 12 axis of rotation of a crank arm 41 is arranged. Screws 40 (FIG. 2) are used to fasten the motor gear unit 36 to the support plate 12.
  • a crank pin 42 of the crank arm 41 engages between the legs 43 of a U-shaped leaf spring 44 connected to the slide 27.
  • the legs 43 are attached to a mounting body 45, which in turn rigid with the slide, z. B. is connected by screws, rivets or rivets.
  • the mounting body 45 can, for. B. be a casting, in the manufacture of which the ends of the legs 43 of the leaf spring 44 are cast. Instead, a metal block can also serve as the mounting body, in which the leaf spring is fastened by clamping or by a pin. In addition to a rigid attachment, a limited movement of the leg ends of the leaf spring 44 can also be considered.
  • an extension 46 is formed on the slide 27 in conjunction with two limit switches 47 and 48.
  • microswitches serve as limit switches, the actuating plungers 50 and 51 of which are activated on the housings of the microswitches pivotally mounted levers 52 and 53 can be actuated.
  • An angular position of the limit switches 47 and 48 ensures that the projection 46 alternates with the lever 52 of the limit switch 47 or the lever 53 of the limit switch 48 in when the slide 27 moves into its end positions according to the double arrow 30 in FIG. 2 Contact occurs and the actuating plunger 50 or 51 acts on these limit switches.
  • the shoulder 46 is provided with a step 49, by means of which two mutually offset work surfaces for the actuating levers 52 and 53 are created. Due to the position of the step on the extension 46, the switching stroke can be determined despite the unchanged position of the limit switches 47 and 48.
  • this arrangement allows an overflow, ie. H. the approach. 46 can not damage the levers 52 and 53 if it moves a little further after contact with the levers due to the stopping of the motor 37 and thus the slide 27.
  • the desired angular position of the limit switches 47 and 48 is at the same time ensured with the opposite-facing arrangement of the levers 52 and 53 in a simple manner that two identical limit switches rotated 180 ° and then fastened with two screws 54 to the support plate 12, which extend through mounting holes arranged diagonally with respect to the rectangular shape of the limit switches.
  • a clamping strip 55 is fastened on the support plate 12 next to the gear 38 with screws 56.
  • To these connecting lines 57 and 58 for the motor 37 and further connecting lines 60 to 63 of the two limit switches 47 and 48 are connected.
  • the attachment of the two limit switches 47 and 48 also leads to a short and simple line routing.
  • a cap 64 made of insulating plastic. This is fastened to the support plate 12 by a snap fastening.
  • the cap 64 overlaps with its side walls 65 and 66 the lateral angled portions 11 and 14 of the support plate 12.
  • the latter has flaps 67 and 68, which are pressed out in an angular manner, behind which protrusions 70 and 71 of the side walls 65 and 66 engage.
  • the projection 71 is formed with sharp edges, while the opposite projection 70 is rounded.
  • An inclined surface 72 adjoining the projection 71 allows the cap to be pressed onto the support plate 12 for assembly until the projections 70 and 71 reach behind the tabs 67 and 68 and snap into place.
  • a small opening 74 is provided on one end face 73, through which an elongated auxiliary tool, for. B. can insert a designated rod or a suitable screwdriver.
  • auxiliary tool for. B. can insert a designated rod or a suitable screwdriver.
  • the width of the cap 64 is selected to be a small amount smaller than the width of the circuit breaker 1, and the support plate 12 is correspondingly narrower so that the cap 64 with its side walls 65 and 66 bends 11 and 13 Support plate 12 can cover.
  • the undersize of the cap 64 relative to the circuit breaker 1 allows the cap to be removed from the motor drive in the manner indicated, even if a plurality of circuit breakers are mounted next to one another without a gap.
  • a small space of 1 or 2 mm is sufficient to bring the one side wall of the cap with its projection out of engagement with the associated tab of the support plate.
  • the slide 27 also fulfills another function, namely the display of the respective switching position of the circuit breaker 1.
  • the circuit breaker Labels 75 and 76 attached, e.g. B. "0" for the off position and "I" for the on position.
  • This characteristic Drawings can be printed, glued or embossed symbols with or without color highlighting.
  • An opening 77 is located in the support plate 12 above the markings in order to make the markings visible.
  • a further opening 80 which lies above the opening 77, is located in a part 81 of the cap 64, which is pulled down to a short distance 82 from the support plate in order to ensure good visibility of the marking 75 or 76 which is in each case below the opening 80 to guarantee.
  • a rotary handle 84 for actuating the circuit breaker 1 in the event of failure of the auxiliary voltage required to operate the motor drive is placed on this.
  • this is provided with a corresponding opening 85.
  • a collar 86 of the rotary handle secures it against removal when the cap 64 is in place.
  • the transmission 40 contains a one-way clutch which enables the crank arm 41 to be rotated by means of the rotary handle 84 without simultaneously rotating the motor 37 :
  • One-way clutches are known per se and are available in a number of suitable designs. It has therefore not been presented in the context of the present application.
  • a special feature of the rotary handle 84 avoids any danger to the operating personnel which would otherwise be conceivable if an operator wishes to switch the circuit breaker 1 on or off by actuating the rotary handle 84 and at the same time the motor transmission unit 36 is started remotely.
  • the rotary handle 84 (FIG.
  • the rotary handle 84 in connection with the mentioned one-way clutch has the essential advantage that the motor drive 25 does not have to be dismantled in the event of a failure of the auxiliary voltage to actuate the circuit breaker, and nevertheless a quick emergency actuation is possible.
  • the motor drive described acts in the following way: starting from the switch-on position shown in the figures, the slide 27 is shifted to the right when the motor 37 is switched on by means of the crank 41 and the crank pin 42, the power transmission from the crank pin 42 via the leaf spring 44, one the tab 31 and the cylindrical body 32 on the operating handle 5 of the circuit breaker 1.
  • the switch-off position is reached after the crank arm 41 has been rotated by approximately 180 °, the shoulder 46 runs against the actuating lever 52 of the limit switch 47 and thereby interrupts the supply circuit of the motor 37.
  • the leaf spring 44 enables tolerance compensation and thereby prevents the actuating handle from being subjected to excessive stress 5. In the switching process described, there are no significant radial forces between the actuating handle 5 and the cylindrical body 32.
  • the guideway 34 of the support plate 12 is therefore subject to only a slight and accidental stress due to the upper flattening of the cylindrical body 32 and therefore does not require any special surface treatment. Accordingly, the cylindrical body 32 normally faces the guideway at a certain distance, so that no special precautions are required with regard to the tolerances either. Between the cylindrical body 32 and the flap 31 there is a line contact in the form of a flat surface and a large radius, which in connection with the selected pairing of the materials leads to a low specific stress. In particular, however, any locally concentrated and scraping stress is kept away from the actuating handle 5 by the attached cylindrical body 32.
  • the switching process takes place in mutatis mutandis the same manner by a further 180 0, the slider after renewed activation of the motor 37 at a constant rotational direction of the motor and thus the gear 38 and the crank 41 shifted in the opposite direction 27 until, upon reaching the Switching point of the circuit breaker of the limit switch 48 is actuated and the motor drive is stopped.
  • the leaf spring 44 ensures the transmission of the driving force and tolerance compensation when the slide 27 reaches the end position.

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EP19810730041 1980-04-15 1981-03-30 Mécanisme d'actionnement par moteur pour interrupteur de protection basse tension Expired EP0038291B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803014827 DE3014827C2 (de) 1980-04-15 1980-04-15 Motorantrieb für Niederspannungs-Schutzschalter
DE3014827 1980-04-15

Publications (2)

Publication Number Publication Date
EP0038291A1 true EP0038291A1 (fr) 1981-10-21
EP0038291B1 EP0038291B1 (fr) 1984-02-22

Family

ID=6100323

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810730041 Expired EP0038291B1 (fr) 1980-04-15 1981-03-30 Mécanisme d'actionnement par moteur pour interrupteur de protection basse tension

Country Status (3)

Country Link
EP (1) EP0038291B1 (fr)
JP (1) JPS56165241A (fr)
DE (1) DE3014827C2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0154369A2 (fr) * 1984-03-09 1985-09-11 ABB SACE S.p.A. Commande de moteur en particulier du type d'accumulation d'énergie pour disjoncteurs de sécurité à basse tension
WO2001069636A1 (fr) * 2000-03-17 2001-09-20 Ge Power Controls France Commande motorisee pour disjoncteur

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3045568C2 (de) * 1980-11-28 1982-10-28 Siemens AG, 1000 Berlin und 8000 München Motorantrieb für Niederspannungs-Schutzschalter
JPH03124758U (fr) * 1990-03-30 1991-12-17

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2870288A (en) * 1955-06-23 1959-01-20 Ite Circuit Breaker Ltd Motor operated circuit breakers
US3328731A (en) * 1965-06-14 1967-06-27 Huska Paul Combined electrical circuit breaker and actuator
US3654535A (en) * 1970-03-27 1972-04-04 Westinghouse Electric Corp Motor operated circuit breaker control
US3752947A (en) * 1972-07-27 1973-08-14 Ite Imperial Corp Auxiliary mechanism for operating handle of circuit breaker
EP0006962A1 (fr) * 1978-04-05 1980-01-23 Siemens Aktiengesellschaft Dispositif moteur pour disjoncteur de puissance basse tension

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL300256A (fr) * 1962-11-08
US3629744A (en) * 1970-03-27 1971-12-21 Westinghouse Electric Corp Motor-operated circuit breaker

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2870288A (en) * 1955-06-23 1959-01-20 Ite Circuit Breaker Ltd Motor operated circuit breakers
US3328731A (en) * 1965-06-14 1967-06-27 Huska Paul Combined electrical circuit breaker and actuator
US3654535A (en) * 1970-03-27 1972-04-04 Westinghouse Electric Corp Motor operated circuit breaker control
US3752947A (en) * 1972-07-27 1973-08-14 Ite Imperial Corp Auxiliary mechanism for operating handle of circuit breaker
EP0006962A1 (fr) * 1978-04-05 1980-01-23 Siemens Aktiengesellschaft Dispositif moteur pour disjoncteur de puissance basse tension

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0154369A2 (fr) * 1984-03-09 1985-09-11 ABB SACE S.p.A. Commande de moteur en particulier du type d'accumulation d'énergie pour disjoncteurs de sécurité à basse tension
EP0154369A3 (en) * 1984-03-09 1986-07-23 Sace S.P.A. Costruzioni Elettromeccaniche Motor control, in particular of the energy storage type, for low-voltage safety switches
WO2001069636A1 (fr) * 2000-03-17 2001-09-20 Ge Power Controls France Commande motorisee pour disjoncteur
FR2806524A1 (fr) * 2000-03-17 2001-09-21 Ge Power Controls France Commande motorisee pour disjoncteur
US6396228B2 (en) 2000-03-17 2002-05-28 General Electric Company Motor operator for a circuit breaker

Also Published As

Publication number Publication date
DE3014827A1 (de) 1981-10-22
DE3014827C2 (de) 1983-10-27
EP0038291B1 (fr) 1984-02-22
JPS56165241A (en) 1981-12-18

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