EP0154369A2 - Motorsteuerung insbesondere des Energiespeichertyps für Niederspannungssicherheitsschalter - Google Patents

Motorsteuerung insbesondere des Energiespeichertyps für Niederspannungssicherheitsschalter Download PDF

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Publication number
EP0154369A2
EP0154369A2 EP85200198A EP85200198A EP0154369A2 EP 0154369 A2 EP0154369 A2 EP 0154369A2 EP 85200198 A EP85200198 A EP 85200198A EP 85200198 A EP85200198 A EP 85200198A EP 0154369 A2 EP0154369 A2 EP 0154369A2
Authority
EP
European Patent Office
Prior art keywords
slider
handle
switch
levers
knee
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
EP85200198A
Other languages
English (en)
French (fr)
Other versions
EP0154369A3 (en
EP0154369B1 (de
Inventor
Angelo Mostosi
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.)
ABB SACE SpA
Original Assignee
ABB SACE SpA
SACE SpA
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 ABB SACE SpA, SACE SpA filed Critical ABB SACE SpA
Publication of EP0154369A2 publication Critical patent/EP0154369A2/de
Publication of EP0154369A3 publication Critical patent/EP0154369A3/en
Application granted granted Critical
Publication of EP0154369B1 publication Critical patent/EP0154369B1/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
    • H01H71/66—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
    • H01H71/66—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"

Definitions

  • the present invention relates to low-voltage safety electric switches and specifically relates to a motor control, in particular of the energy storage type, for such switches.
  • low-voltage safety switches com prise a mechanism suitable to be hand-actuated by means of a handle, to cause, through a system of knee-joint levers, the shifting of movable contacts from their open ing position, to their closing position, and vice-versa.
  • the two end positions of this handle show visually the condition of "open” or of "closed” of the switch.
  • the switches of this type are also provided with particular devices, called “releasers", capable of automatically shifting the movable contacts to their-opening position, in case of a short-circuit, or of a higher current than the rated value.
  • a motor control in particular a con trol of the energy storage type, comprising a slider suitable to be linearly moved between two extreme positions and constrained to the handle of the switch, to move it getting over the dead centre of the system of knee-joint levers, to and from an extreme position.
  • a control known e.g. from U.S.
  • Patent N° 33 28 731 is provided with energy storage means, in particular springs which are loaded by the shift of the slider towards an extreme position, as well as with locking means suitable to keep the slider in this position against the action of loaded springs, it being possible to unlock these lat ter means, e.g. electromagnetically, so as to allow the slider to freely shift the handle of the switch from said extreme position under the thrust of said springs, with consequent discharge of the energy stored therein.
  • energy storage means in particular springs which are loaded by the shift of the slider towards an extreme position
  • locking means suitable to keep the slider in this position against the action of loaded springs, it being possible to unlock these lat ter means, e.g. electromagnetically, so as to allow the slider to freely shift the handle of the switch from said extreme position under the thrust of said springs, with consequent discharge of the energy stored therein.
  • Purpose. of the present invention is to obviate this drawback and to create a motor control, in particular of the energy storage type, for low-voltage safety switch es, which allows the hand control handle of the switch to assume, in addition to the two extreme positions indicating the conditions of switch closed and switch open, due to the manual drive, also the intermediate position to the purpose of directly indicating the condition of contacts open following the intervention of releaser de vices.
  • the linearly movable slider of the mo tor control is suitable to act with a front edge thereof on the hand control handle of the switch in its stroke from its extreme position of switch closed to its position of switch open, while for the action on the handle during the reverse stroke, the slider is provided with temporary constraint means, such means being active when the handle and the slider are in their extreme position of switch open, as well as during the stroke of the slid er from this position towards the position of switch closed at least till to the getting over of dead centre by the system of knee-joint levers connecting the handle with the movable contacts of the switch, while said means are inactive in the sense of disengaging the handle from the slider when the handle and the slider are in their extreme position of switch closed.
  • the manual control handle of the switch can freely move from its extreme position of switch clos ed to an intermediate position owing to an intervention of releaser devices, in order to visually indicate this condition of the switch.
  • Said temporary constraint means may be advantageously constituted by two symmetrical double-arm levers hinged on the slider, and provided at the end of one of their arms with hooks suitable to seize the handle of the switch on the opposite side respectively to that on which the slider edge acts, said levers being linked to each other in correspondence of the end of the other one of -their arms, by elastic means tending to mutually space apart the hook ends of the same levers, contrasting cam-shaped fixed means suitable to keep said hook ends close to each other, and hence suitable to keep the switch handle seized when the slider is in its position of switch open, and during a first portion of its stroke from this position to its position of switch closed, and to make free the hook ends of the levers to separate un der the action of said elastic means during the further movement stroke of the slider towards its extreme position of switch closed.
  • the handle of the switch trips automatically to its position indicating the condition of switch closed, and the two levers borne by the slider, not being any longer under friction engagement with the handle, move to the position, allowed by the cam-shaped fixed means, wherein their hook-shaped ends are spaced apart.
  • a low-voltage safety switch generally indicated with 1, of a type per se known, comprising a case 2 of isolating material, and a manual control handle 3 linked through a system of knee-joint levers (not shown) to the movable contacts of the switch.
  • this handle By moving this handle from an extreme position to a second extreme position and vice-versa, each time getting over the dead centre of the knee joint lever system, ' the movable contacts of the switch can be brought to their closed position and res pectively to their open position.
  • the switch 1 is also provided with releaser devices intervening in case of short-circuit and/or in case of overcurrents, to the purpose of opening the contacts of the switch.
  • releaser devices intervening in case of short-circuit and/or in case of overcurrents, to the purpose of opening the contacts of the switch.
  • the handle 3 of the switch 1 is shifted to an intermediate position between the two extreme positions indicating the conditions of switch open and switch clos ed, the whole being as it is well known in the art, and as it is disclosed e.g. in the German Patent Application publication N° 31 19 483, a description and illustration in greater detail being therefore needless.
  • a supporting frame 4 is fas tened for an energy storage motor control mechanism con tained within a casing 5. Also this control mechanism is per se known in the art, and it shall be described hereinunder only briefly.
  • the su 2 porting frame 4 is provided with a large centre opening wherein the handle 3 of the switch can freely move.
  • the casing 5 is open downward, i.e., on its side fac ing the case 2 of the switch when it is mounted on the frame 4, and moreover said casing 5 is provided, in an upper point relatively to the area within which the han dle 3 moves, with a window protected by a transparent cover, through which it is possible to observe the posi tion taken each time by the handle 3.
  • a slider 6 having the shape of a plate can linearly slide.
  • an edge 7 thereof shown on the left in the drawings
  • the slider 6 can act against a side of the handle 3.
  • the slider 6 bears a hook-shaped projection 8, integral with it, which forms, in cooperation with the edge 9, a slot 10 open on one side, and closed on the opposite side, where the hook-shaped projection 8 is connect ed with the body of the slider 6.
  • a disk 12 is rotatably mounted around the axis of a vertical pin 11, said disk 12 being provid ed in its lower face with a stud 13 suitable to enter, during the rotation of the disk 12 in the direction of arrow 14 (figs. 2 to 5), inside said slot 10 of the slid er 6, to cause the linear shifting, in either direction, of the same slider between an extreme position (that shown on the left-hand side in fig. 2) and the other ex treme position (that shown on the right-hand side in figs. 3 and 4).
  • the left-hand position (fig. 2) of the slider 6 is the one corresponding to the position of switch open, and the right-hand position (fig. 5) is that correspond ing to the position of switch closed.
  • the disk 12, driving by means of its stud 13 the move ments of the slider 6, is caused to rotate, by half a turn (from its position shown in fig. 3 to its position shwon in fig. 2, that is to say, from its position of switch.closed to the position of switch open) by a con trol motor 15, provided, in a way per se known, with stop contacts.
  • a con trol motor 15 provided, in a way per se known, with stop contacts.
  • some springs 16 are tensioned (loaded) with a consequent en ergy storage.
  • Locking means constituted e.g. by a small lever 17 cooperating with a peripheral step 18 of the disk 12 and with a stopping pin 19 stop the disk 11 and thereby the slider 6 in their position shown in fig. 2, and under this condition keep the springs 16 under tension.
  • the slider 6 On its lower face (the one facing the switch case 2), the slider 6 supports a couple of double-arm levers 21 and 22, rotatably mounted around pivots 23 and 24 integral with the same slider.
  • These two levers 21 and 22 are symmetrically shaped and positioned, relatively to the centre axis of the slider 6 parallel to the shifting direction thereof.
  • the ends of the longer arms of the two levers 21 and 22 are bent to a hook-shape 25 and 26, and are suitable to seize the handle 3 of the switch from the opposite side relatively to the side on which the edge 7 of the slider is active, said arms protruding beyond this edge 7.
  • the cam-guides 28 and 29 are each pro vided with a first section 28a and respectively 29a (on the left in the figures) closer to the centre axis of shifting, and, parallel to it, of the slider 6, as well as with a second section 28b and respectively 29b (on the right in the figures) farther from said axis, the two sections said being connected to each other by rak ing sections 28c and respectively 29c.
  • the hook ends.25 and 26 of the levers 21 and 22 rest against the sections 29a and respectively 28a of the cam-guides, they can seize the handle 3 of the switch (see fig. 2), whilst when they rest against the sections 29b and res pectively 28b, the handle 3 results to be disengaged from said seizure (see figs. 3 and 4).
  • Fig. 3 shows this extreme position of the handle 3 and of the slider 6 with the levers 21 and 22 wide apart.
  • the dotted lines also an intermediate position is shown of the handle 3 and of the levers 21 and 22, with their hook ends being still in engagement condition with the same handle, said intermediate position being roughly corresponding to that wherein the system of knee-joint levers linked to the handle is close to get over the dead centre.
  • Fig. 5 shows lastly an intermediate position of the slider 6 and of the handle 3 during the shifting from their position of switch closed towards the position of switch open.
  • it is the front edge 7 of the slider 6 of the motor control, which pushes the han dle 3 towards its position of switch open (fig. 2), while during the movement of the slider 6 the hook ends 25 and 26 of the levers 21 and 22, by sliding in contact with the fixed cam-guides 29 and 28 are gradually brought again into their not spaced apart position (against the action of the spring 27), to be finally ready again to seize the handle 3 when the same reaches its position of switch open.
  • the pres ent invention allows, with the aid of extremely simple means, a motor control to be realized, in particular of the energy storage type, for a safety switch provided with releaser devices, wherein the control handle of the switch is able to visually and directly indicate not only the positions of switch closed and switch open,.but also the condition of switch open owing to an intervention of the releaser devices.

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  • Electric Propulsion And Braking For Vehicles (AREA)
EP19850200198 1984-03-09 1985-02-18 Motorsteuerung insbesondere des Energiespeichertyps für Niederspannungssicherheitsschalter Expired EP0154369B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2117984U IT8421179V0 (it) 1984-03-09 1984-03-09 Comando a motore, in particolare ad accumulo di energia, per interruttori di protezione di bassa tensione.
IT2117984U 1984-03-09

Publications (3)

Publication Number Publication Date
EP0154369A2 true EP0154369A2 (de) 1985-09-11
EP0154369A3 EP0154369A3 (en) 1986-07-23
EP0154369B1 EP0154369B1 (de) 1988-10-19

Family

ID=11177968

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19850200198 Expired EP0154369B1 (de) 1984-03-09 1985-02-18 Motorsteuerung insbesondere des Energiespeichertyps für Niederspannungssicherheitsschalter

Country Status (3)

Country Link
EP (1) EP0154369B1 (de)
DE (1) DE3565740D1 (de)
IT (1) IT8421179V0 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0506066A1 (de) * 1991-03-27 1992-09-30 Moeller GmbH Motorantrieb für elektrische Schaltgeräte, insbesondere Leistungsschalter
EP0801411A2 (de) * 1996-03-26 1997-10-15 Structured Technology Corporation Motormodul für in situ Montage auf Schutzschaltern
CN101188178B (zh) * 2007-11-30 2011-01-19 赵建清 电动式漏电断路器
CN111863555A (zh) * 2020-07-15 2020-10-30 陈垠杰 一种可调整的空气开关的跳闸结构
CN112071703A (zh) * 2020-09-28 2020-12-11 湖北楚天电气有限公司 一种隔离开关箱断电保护操作机构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3328731A (en) * 1965-06-14 1967-06-27 Huska Paul Combined electrical circuit breaker and actuator
EP0038291A1 (de) * 1980-04-15 1981-10-21 Siemens Aktiengesellschaft Motorantrieb für Niederspannungs-Schutzschalter
FR2483124A1 (fr) * 1980-05-20 1981-11-27 Matsushita Electric Works Ltd Disjoncteur

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3328731A (en) * 1965-06-14 1967-06-27 Huska Paul Combined electrical circuit breaker and actuator
EP0038291A1 (de) * 1980-04-15 1981-10-21 Siemens Aktiengesellschaft Motorantrieb für Niederspannungs-Schutzschalter
FR2483124A1 (fr) * 1980-05-20 1981-11-27 Matsushita Electric Works Ltd Disjoncteur

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0506066A1 (de) * 1991-03-27 1992-09-30 Moeller GmbH Motorantrieb für elektrische Schaltgeräte, insbesondere Leistungsschalter
EP0801411A2 (de) * 1996-03-26 1997-10-15 Structured Technology Corporation Motormodul für in situ Montage auf Schutzschaltern
EP0801411A3 (de) * 1996-03-26 2000-10-04 Structured Technology Corporation Motormodul für in situ Montage auf Schutzschaltern
CN101188178B (zh) * 2007-11-30 2011-01-19 赵建清 电动式漏电断路器
CN111863555A (zh) * 2020-07-15 2020-10-30 陈垠杰 一种可调整的空气开关的跳闸结构
CN112071703A (zh) * 2020-09-28 2020-12-11 湖北楚天电气有限公司 一种隔离开关箱断电保护操作机构
CN112071703B (zh) * 2020-09-28 2022-10-25 湖北楚天电气有限公司 一种隔离开关箱断电保护操作机构

Also Published As

Publication number Publication date
EP0154369A3 (en) 1986-07-23
DE3565740D1 (en) 1988-11-24
IT8421179V0 (it) 1984-03-09
EP0154369B1 (de) 1988-10-19

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