EP3300533A1 - Schutzschalterartige schutzvorrichtung mit einem anschlag zur einstellung der kalibrierfeder - Google Patents

Schutzschalterartige schutzvorrichtung mit einem anschlag zur einstellung der kalibrierfeder

Info

Publication number
EP3300533A1
EP3300533A1 EP17709128.7A EP17709128A EP3300533A1 EP 3300533 A1 EP3300533 A1 EP 3300533A1 EP 17709128 A EP17709128 A EP 17709128A EP 3300533 A1 EP3300533 A1 EP 3300533A1
Authority
EP
European Patent Office
Prior art keywords
spring
shaft
stop
hooking part
protective device
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
EP17709128.7A
Other languages
English (en)
French (fr)
Other versions
EP3300533B1 (de
Inventor
Stéphane Eloy
Jérémy JELSCH
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.)
Hager Electro SAS
Original Assignee
Hager Electro SAS
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 Hager Electro SAS filed Critical Hager Electro SAS
Publication of EP3300533A1 publication Critical patent/EP3300533A1/de
Application granted granted Critical
Publication of EP3300533B1 publication Critical patent/EP3300533B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7463—Adjusting only the electromagnetic mechanism
    • 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
    • H01H2009/0088—Details of rotatable shafts common to more than one pole or switch unit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
    • H01H69/01—Apparatus or processes for the manufacture of emergency protective devices for calibrating or setting of devices to function under predetermined conditions
    • H01H2069/013—Apparatus or processes for the manufacture of emergency protective devices for calibrating or setting of devices to function under predetermined conditions with calibrating screws in trip bar
    • 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H2071/7481—Means for adjusting the conditions under which the device will function to provide protection with indexing means for magnetic or thermal tripping adjustment knob

Definitions

  • Circuit breaker type protection device having a calibration spring adjustment stop
  • the present invention relates to an electrical line protection device, circuit breaker type, designed to ensure the protection of at least one line by circuit opening in the event of a fault resulting from a rapid rise in the current in this line, for example more a short circuit, or a slow rise in case of overload in this line, and a method using such a protective device.
  • a type of protective device of at least one line of the circuit breaker type comprises a magnetic assembly comprising a coil connected to the circuit of the current line, having a core fixed metal, and a movable core against a calibration spring having a calibrated force.
  • the current in the coil generates a magnetic attraction force on the mobile core depending on its intensity, which from a magnetic force threshold compresses the return spring by moving a trigger.
  • the trigger then allows a pivoting arm mounted on an axis, to switch by causing a blunt opening of a contact disposed in the electrical circuit.
  • the various electrical and mechanical components forming this system have manufacturing dispersions including dimensional tolerances, which give an inaccuracy on the magnetic stress threshold.
  • the series-produced calibration spring has force dispersions which are predominant in the magnetic threshold deviations.
  • a known solution is to reduce the manufacturing dispersions of the various components, in particular those of the spring, to obtain a more precise magnetic stress threshold.
  • this solution leads to a significant increase in the costs of manufacturing processes and control of these components.
  • Another known solution is to assemble the protection device with a particular calibration spring, then after a measurement of the current related to the magnetic threshold triggering the disjunction, replace this spring to adjust its force level to obtain the requested accuracy for the magnetic threshold.
  • the present invention is intended to avoid these disadvantages of the prior art.
  • an electrical protection device of the circuit-breaker type comprising a shaft, a calibration spring, at least one electrical circuit designed to pass the current of a power line, and a coil connected to this circuit having a movable core attracted by this coil which moves from a magnetic force threshold, by compressing the calibration spring having turns wrapped around the shaft and a gripping part connected to this shaft, for to open a contact of the electrical circuit,
  • this protection device being remarkable in that the shaft comprises an adjustment stop receiving the support of the spring hooking part, having several positions giving positioning gaps of this hooking part .
  • An advantage of this device is that an operator can access the adjustment stopper depending on a current measurement giving the triggering magnetic threshold, quickly change the position of the calibration spring support.
  • the protection apparatus according to the invention may further comprise one or more of the following features, which may be combined with each other.
  • the adjustable stop is rotatably mounted about a pivot, perpendicular to the axis of rotation of the shaft, said adjustable stop having different bearing sides of the snap portion of the spring, arranged around a pivot preferably perpendicular to the axis of rotation of the shaft.
  • the adjustable stop has a substantially polygonal shape, preferably substantially square. In this way at least three support positions are obtained for fastening the spring.
  • the sides of the adjustable bearing abutment of the spring attachment portion each have a recess extending in a direction substantially parallel to this side and adapted to receive the attachment portion. This is a maintenance of the spring wire.
  • the adjustable stop has a slot for driving it in rotation using a screwdriver.
  • a simple way is obtained to maneuver the adjustment stop which can be at the bottom of a housing of its housing.
  • the angular spacing of the attachment portion of the spring about the axis of the shaft may be less than 10 °.
  • the spring stiffness difference may be less than or equal to 10%.
  • the adjustment stop comprises a marking indicating in the direction of movement an increase or decrease in the magnetic stress threshold. The operator thus easily sees the direction of movement to be applied to make his adjustment.
  • the spring comprises two bodies of turns connected by a straight portion parallel to the shaft forming the attachment portion of this spring.
  • a symmetrical spring is obtained with respect to the attachment part, which has a better balance.
  • the invention also relates to a method for adjusting an electric line protection device comprising any one of the preceding characteristics, which comprises a step of measuring the current in the electrical circuit for the magnetic stress threshold, then if necessary a step of modifying the position of the adjustment stop fixed on the shaft receiving the support of the attachment portion of the spring, to modify the preload of this spring.
  • FIG. 1 shows the inside of a protection device according to the invention, designed to protect a line comprising three poles;
  • Figure 2 is a perspective view showing the metal cores of the central coil of this apparatus, and the axis supporting the calibration spring of this coil;
  • Figures 3 and 4 are respectively a top view is a side view of this axis.
  • Figures 5 and 6 are sectional views of this axis respectively presented along the sectional plane V-V and VI-VI.
  • Figures 1 and 2 show a support 2 of molded plastic material, comprising three parallel assemblies provided to independently provide the safety of three power lines, each comprising a metallic electrical contact 4 providing a connection to this line.
  • Figure 2 details elements of the central assembly, which are similar for the other two on the sides.
  • Each set comprises a winding, not shown, arranged along a magnetic main axis of winding, framed on one side of this axis by a fixed metal core 6 covering the rear face and the lateral parts of this coil, and on the other side of this axis by a movable metal core 8 covering the front face of this coil.
  • the movable metal core 8 has two lower tabs 10 allowing pivoting of the movable core to move closer to the coil along its magnetic axis.
  • Each spring 14 comprises a central right portion parallel to the shaft 12 forming a hooking portion 16 fixed to this shaft, extending at each end by a helical portion 14 contiguous turns wound around this shaft, which ends with a straight segment forming a movable portion 18, comprising at its end a small hook bearing on the top of the movable core 8 at a lateral point.
  • a rocking lever 20 forming a release is released when the movable core 8 moves towards the coil, from a force of attraction of this coil exceeding the constant force of the calibrated spring 14.
  • the lever 20 rocker, and abruptly opens an electrical contact of the electrical circuit to achieve the disjunction of this circuit.
  • the rocking lever 20 is rigidly connected to the shaft 12.
  • the protection device comprises user adjustment buttons 22 protruding above the housing 2, which are accessible from the outside when this apparatus is covered with a protective cover, allowing it to be turned with a screwdriver a particular adjustment of the housing.
  • breaker magnetic tripping threshold indicated by markings applied to the hood opposite the positions of the adjustment knob.
  • the particular magnetic trip threshold setting requires a fine calibration of this trigger level of the device to provide the required protection. It is therefore interesting to provide a factory setting for fine calibration of the trigger level.
  • an adjustable stop 30 substantially forming a molded plastic square, fixed on the shaft 12 by a center pivot O preferably perpendicular to the axis of this shaft, including a face parallel to this axis, facing the opposite side to movable core 8, carries the support of the attachment portion 16 of the calibration spring to secure it with this shaft.
  • Three active sides of the square of the adjustable abutment 30 comprise a slight recess 40 extending in a direction substantially parallel to this side, which allows the adjustment of the straight attachment portion 16 of the spring 14 to avoid a disengagement of this part.
  • the top of the square of the adjustable stop 30 has a central slot 32 allowing the engagement of a screwdriver 34 shown in FIG. 1, in order to turn this stop a quarter turn to the left as shown by the arrow 36 towards a side presenting a marking "-", or on the right as presented by the arrow 38 to a side having a marking "+".
  • the top of the square of the adjustable stop 30 may have a cruciform central recess for the engagement of a Phillips screwdriver.
  • the three active sides of the square of the adjustable stop 30 being at a progressively greater distance from its pivot O, one obtains a rotation of this square successively starting from the position A shown on the right in FIG. 3 after a rotation indicated by FIG.
  • the positions of the adjustable stop 30 give between two successive positions a difference in angular position of the attachment portion 16 of the spring 14 around the shaft 12, varying by 5 °. These angular position variations allow, between two positions, to compensate for the stiffness of the spring 14 between + 1-1% and +/- 10% depending on the stiffness of the spring adapted to current intensity calibres.
  • This adjustable stop system 30 integrated on the shaft 12 is very compact, and can be easily added to an existing device without changing its size.
  • the use of three faces of the square of the adjustable stop 30 gives by the support of the right hooking portion 16 of the spring 14 on these faces, very stable indexed positions.
  • the four faces of the square could be used, or a stop having a different number of support faces. It is also possible to use an adjustable stop having a support of the attachment point of the spring 16 giving a continuous variation of the position of this attachment point.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
EP17709128.7A 2016-06-17 2017-02-09 Schutzschalterartige schutzvorrichtung mit einem anschlag zur einstellung der kalibrierfeder Active EP3300533B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1655675A FR3052909B1 (fr) 2016-06-17 2016-06-17 Appareil de protection du type disjoncteur comportant une butee de reglage du ressort de calibrage
PCT/FR2017/050289 WO2017216433A1 (fr) 2016-06-17 2017-02-09 Appareil de protection du type disjoncteur comportant une butée de réglage du ressort de calibrage

Publications (2)

Publication Number Publication Date
EP3300533A1 true EP3300533A1 (de) 2018-04-04
EP3300533B1 EP3300533B1 (de) 2019-06-26

Family

ID=56943709

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17709128.7A Active EP3300533B1 (de) 2016-06-17 2017-02-09 Schutzschalterartige schutzvorrichtung mit einem anschlag zur einstellung der kalibrierfeder

Country Status (5)

Country Link
EP (1) EP3300533B1 (de)
JP (1) JP7026059B2 (de)
CN (1) CN108780722B (de)
FR (1) FR3052909B1 (de)
WO (1) WO2017216433A1 (de)

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT343207B (de) * 1976-08-23 1978-05-10 Felten & Guilleaume Ag Oester Einstellvorrichtung fur schnellausloser von leitungsschutzschaltern
US6433659B1 (en) * 2000-03-15 2002-08-13 Eaton Corporation Cam and axle for adjustable magnetic trip device
US6407653B1 (en) * 2000-09-20 2002-06-18 Eaton Corporation Circuit interrupter with a magnetically-induced automatic trip assembly having adjustable armature biasing
US6396373B1 (en) * 2000-12-29 2002-05-28 Square D Company Adjustable armature assembly for a circuit breaker and method of using same
US6667675B2 (en) * 2002-05-01 2003-12-23 Eaton Corporation Adjustable magnetic trip assembly for circuit breaker
JP4419706B2 (ja) 2004-06-24 2010-02-24 富士電機機器制御株式会社 回路遮断器
JP4906528B2 (ja) * 2007-02-01 2012-03-28 三菱電機株式会社 回路遮断器の過電流引き外し装置
AT509250A1 (de) * 2008-03-05 2011-07-15 Moeller Gebaeudeautomation Gmbh Schaltgerät
US7800466B2 (en) * 2008-05-30 2010-09-21 Eaton Corporation Magnetic trip mechanism and electrical switching apparatus employing the same
KR101206540B1 (ko) * 2011-12-28 2012-11-30 현대중공업 주식회사 배선용 차단기의 순시 가조정 장치
FR2987164B1 (fr) 2012-02-17 2014-03-28 Hager Electro Sas Declencheur instantane pour appareil electrique de protection de lignes du type disjoncteur.
CN203250706U (zh) * 2013-04-12 2013-10-23 施耐德电器工业公司 磁脱扣机构

Also Published As

Publication number Publication date
WO2017216433A1 (fr) 2017-12-21
CN108780722B (zh) 2020-07-03
JP7026059B2 (ja) 2022-02-25
EP3300533B1 (de) 2019-06-26
FR3052909A1 (fr) 2017-12-22
FR3052909B1 (fr) 2018-07-13
JP2019518312A (ja) 2019-06-27
CN108780722A (zh) 2018-11-09

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