EP0178250A2 - Dispositif de déclenchement magnétique pour un appareil de commutation avec un dispositif de réglage - Google Patents

Dispositif de déclenchement magnétique pour un appareil de commutation avec un dispositif de réglage Download PDF

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Publication number
EP0178250A2
EP0178250A2 EP85730125A EP85730125A EP0178250A2 EP 0178250 A2 EP0178250 A2 EP 0178250A2 EP 85730125 A EP85730125 A EP 85730125A EP 85730125 A EP85730125 A EP 85730125A EP 0178250 A2 EP0178250 A2 EP 0178250A2
Authority
EP
European Patent Office
Prior art keywords
armature
magnetic
pole
current
magnetic yoke
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
EP85730125A
Other languages
German (de)
English (en)
Other versions
EP0178250B1 (fr
EP0178250A3 (en
Inventor
John W. Young
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 EP0178250A2 publication Critical patent/EP0178250A2/fr
Publication of EP0178250A3 publication Critical patent/EP0178250A3/de
Application granted granted Critical
Publication of EP0178250B1 publication Critical patent/EP0178250B1/fr
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
    • H01H71/74—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
    • 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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/2472—Electromagnetic mechanisms with rotatable armatures

Definitions

  • the invention relates to a magnetically acting triggering device for a switching device with a magnetic yoke that can be excited by the current to be monitored and an armature that is arranged to be movable relative to the magnetic yoke, and with an adjusting device for influencing the response current, the adjusting device being the distance of the armature from the pole face of the magnetic yoke and determines the size of the restoring force acting on the armature
  • a triggering device of this type is known for example from US-A-3775713 or DE-B-2625894.
  • the current that triggers a movement of the armature against all forces acting on it and thereby releases the latching device of the switching device for the purpose of separating its contact members is to be regarded as the tripping current.
  • the tripping current depends above all on the distance of the armature from the associated yoke and on the restoring force which the armature strives to move to its rest position. Both variables are therefore equally suitable both for the operational setting of the tripping current and for calibration.
  • Calibration in the context of the invention is to be understood as the definition of a lower and an upper limit value of the tripping current.
  • the tripping current can be selected within these limit values by means of a setting device that can be used for operational purposes.
  • the invention is based on the object of enabling simple calibration of an upper and a lower limit value of the tripping current as easily as possible.
  • the magnetic yoke can be composed of iron parts, the pole faces of which are arranged to be relatively adjustable.
  • the magnetic yoke is E-shaped and that the central magnetic pole of the magnetic yoke, which is enclosed by a coil, is adjustable relative to the outer poles.
  • the path of the armature is limited either by the outer poles or the middle pole
  • FIG. 1 shows a view of a pole of a circuit breaker with the housing cover removed in order to illustrate the magnetic tripping device according to the invention.
  • FIG. 2 is a simplified side view of a magnetic high of the triggering device.
  • FIG. 3 is a top view of the triggering device according to FIG. 2.
  • FIG. 4 shows a view of the magnetic yoke of the release device according to FIG. 2 from below
  • FIG. 5 is a view of the magnetic yoke according to FIG. 2 looking towards the left side in FIG. 2;
  • FIG. 6 shows a detail of a middle magnetic poise of the magnetic yoke according to FIG. 5.
  • the pole 10 of a low-voltage circuit breaker shown in FIG. 1 is shown with the cover removed in order to make the inner parts of the circuit breaker visible.
  • the pole 10 has a magnetic arrangement 12, an adjusting lever 14, a release lever 16, a movable contact arrangement 18, a fixed contact arrangement 20 and a drive device 22 with an actuating handle 24.
  • the actuating handle 24 can be moved between an on position and an off position. When the operating handle 24 is in the closed position, the movable contact assembly 18 and the fixed contact assembly 20 touch and form a path for the current flowing through the circuit breaker.
  • the circuit breaker can be operated manually by operating the operating handle 24 or by actuation of the release lever 16 can be opened when the contacts 18 and 20 are in the closed position.
  • the magnetic arrangement comprises a magnetic yoke 26 with side parts 27 serving as pole shoes, an armature 28, a non-magnetic bracket 29 attached to the magnetic yoke 26 for the pivotable mounting of the armature 28 and an adjusting screw 30.
  • the adjusting screw 30 is in one Part of the magnetic yoke 26 screwed.
  • One end of the screw 30 is accessible through an opening in the housing part 11 of the pole 10.
  • a coil spring 32 engages. The end of the coil spring 32 engaging the armature 28 pulls the armature 28 away from the magnetic yoke 26 and from the release lever 16.
  • the other end of the armature 28 faces the setting lever 14.
  • the armature 28 Due to a current flow that magnetizes the magnet yoke 26, the armature 28 is attracted towards the side parts 27 of the magnet yoke 26. Since the armature 28 is pivotally mounted on the bracket 29, movement of one end of the armature 28 in the direction of the magnet yoke 26 causes movement of the other end of the armature in the direction of the release lever 16 against the force of the spring 32. The size the force exerted on the armature by the spring can be adjusted within certain limits by means of the adjusting screw 30. The proximity of the armature 28 toward the pole faces of the magnet yoke 26 can be set within certain limits by the adjustment of the position of the adjustment lever 1. 4
  • circuit breaker z. B. has a nominal current of 1 00 amperes.
  • the same switch can then have a rating for instantaneous triggering in the range from approximately 300 to 1000 amperes.
  • the position of the setting lever 14 is related to the setting of the tripping current and is controlled by rotating a cam. Thus the setting of the tripping current is selected in steps between the low and the high setting value
  • the actuation of the adjusting lever 14 moves the armature in the direction of the magnetic yoke 26 or away from it, which has the effect of reducing the current required to trigger the switch or increasing the current.
  • the adjusting screw 32 can be used to adjust the spring 32 force exerted on the armature can be used, since the movement of the armature in the direction of the magnetic yoke 26 takes place against the action of the spring 32.
  • the two settings mentioned do not directly change the strength of the magnetic field; instead, these settings change the distance of the armature from the magnet yoke 26.
  • the adjustment screw 30 directly and arbitrarily affects the spring force acting on the armature 28.
  • the magnetic arrangement also includes a coil 34 and a central magnetic pole 36 which is attached to the magnetic yoke 26, as a result of which the magnetic yoke as a whole is given an E-shaped shape middle magnetic pole 36 is adjustable by means of a screw 40 (FIGS. 2, 4 and 5) in order to be able to set the current precisely, in which the armature 28 is moved from the first to the second position.
  • the magnetic yoke 26 could also be displaceable when the magnetic pole 36 is stationary.
  • the coil 34 is wound with precise manufacturing tolerances in a known manner on a non-magnetic coil body 38.
  • the coil body 38 and the magnetic pole 36 are then attached together to the magnetic yoke 26.
  • the central magnetic pole 36 is preferably stronger than that formed by the side parts 27 Outer Poles of Magnetic Assembly 12 Formed
  • the adjustable arrangement of the central magnetic pole is sized such that magnetic pole 36 in Fig. 5 can be vertically shifted approximately 2.54 mm (0.1 inches), which increases the trip current by approximately at the low setting 20% changed.
  • the magnetic pole 36 is shown a dimension A behind the side parts 27
  • the low setting can be adjusted first using the adjusting screw 40 and then the high setting using the screw 32, which has no discernible influence on the low setting value
  • the shape of the end of the central magnetic pole 36 according to FIG. 6 so that the magnetic flux is concentrated on the center of the magnetic pole 36. This causes a change in the opening current over the adjustment range of the screw 40 and thus of the magnetic pole 36. In this way, once the high trigger value has been set, the low setting can be made by turning the screw 40 around the central magnetic pole 36 to raise or lower and thereby increase or decrease the magnetic field strength and the attraction force for the armature 28.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
EP85730125A 1984-10-01 1985-09-17 Dispositif de déclenchement magnétique pour un appareil de commutation avec un dispositif de réglage Expired EP0178250B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US656230 1984-10-01
US06/656,230 US4630017A (en) 1984-10-01 1984-10-01 Magnetic structure for calibrating a circuit breaker

Publications (3)

Publication Number Publication Date
EP0178250A2 true EP0178250A2 (fr) 1986-04-16
EP0178250A3 EP0178250A3 (en) 1987-03-11
EP0178250B1 EP0178250B1 (fr) 1989-12-20

Family

ID=24632186

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85730125A Expired EP0178250B1 (fr) 1984-10-01 1985-09-17 Dispositif de déclenchement magnétique pour un appareil de commutation avec un dispositif de réglage

Country Status (5)

Country Link
US (1) US4630017A (fr)
EP (1) EP0178250B1 (fr)
JP (1) JPS6185745A (fr)
CA (1) CA1253909A (fr)
DE (1) DE3574919D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0421691A2 (fr) * 1989-10-05 1991-04-10 Eaton Corporation Disjoncteur avec noyau magnétique mobile pour déclenchement magnétique à courant bas

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS636245A (ja) * 1986-06-25 1988-01-12 Toyota Motor Corp 動力伝達用ｖ型チエ−ンベルト
US9595410B2 (en) 2015-03-05 2017-03-14 Siemens Industry, Inc. Circuit breaker including adjustable instantaneous trip level and methods of operating same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3505623A (en) * 1968-08-09 1970-04-07 Ite Imperial Corp Adjustable magnetic trip means for circuit breakers with single adjustment means
US3775713A (en) * 1972-11-03 1973-11-27 Westinghouse Electric Corp Circuit breaker with externally operable means for manual adjustment and manual tripping
DE2625894B1 (de) * 1976-06-04 1977-08-25 Siemens Ag Elektromagnetischer ueberstromausloeser fuer elektrische schalter
FR2516302A1 (fr) * 1981-11-09 1983-05-13 Telemecanique Electrique Dispositif de reglage du courant d'appel d'un relais d'intensite

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3004546A (en) * 1959-06-02 1961-10-17 Worthington Corp Electro-pneumatic transducer
US3244835A (en) * 1963-05-14 1966-04-05 Zinsco Electrical Products Magnetic tripped circuit breaker
US3275959A (en) * 1964-12-15 1966-09-27 Zinsco Electrical Products Circuit breaker with externally adjustable tripping mechanism
US3343109A (en) * 1965-08-30 1967-09-19 Gen Electric Circuit breaker assembly
US3530414A (en) * 1969-02-26 1970-09-22 Westinghouse Electric Corp Circuit breaker with improved trip means
US3815059A (en) * 1972-12-01 1974-06-04 Westinghouse Electric Corp Circuit interrupter comprising electromagnetic opening means
US3783423A (en) * 1973-01-30 1974-01-01 Westinghouse Electric Corp Circuit breaker with improved flux transfer magnetic actuator
JPS5114769B2 (fr) * 1973-07-20 1976-05-12
US3946346A (en) * 1974-04-29 1976-03-23 Square D Company Current limiting circuit breaker
US4088973A (en) * 1976-04-28 1978-05-09 Gould Inc. Unitized combination starter
US4071836A (en) * 1976-09-07 1978-01-31 Square D Company Current limiting circuit breaker
US4267539A (en) * 1979-08-02 1981-05-12 Heinemann Electric Company Circuit breaker having a cam for external adjustment of its trip point
US4346357A (en) * 1979-12-17 1982-08-24 Gould Inc. Current-limiting circuit breaker adapter
US4409573A (en) * 1981-04-23 1983-10-11 Siemens-Allis, Inc. Electromagnetically actuated anti-rebound latch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3505623A (en) * 1968-08-09 1970-04-07 Ite Imperial Corp Adjustable magnetic trip means for circuit breakers with single adjustment means
US3775713A (en) * 1972-11-03 1973-11-27 Westinghouse Electric Corp Circuit breaker with externally operable means for manual adjustment and manual tripping
DE2625894B1 (de) * 1976-06-04 1977-08-25 Siemens Ag Elektromagnetischer ueberstromausloeser fuer elektrische schalter
FR2516302A1 (fr) * 1981-11-09 1983-05-13 Telemecanique Electrique Dispositif de reglage du courant d'appel d'un relais d'intensite

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0421691A2 (fr) * 1989-10-05 1991-04-10 Eaton Corporation Disjoncteur avec noyau magnétique mobile pour déclenchement magnétique à courant bas
EP0421691A3 (en) * 1989-10-05 1992-05-20 Westinghouse Electric Corporation Circuit breaker with moving magnetic core for low current magnetic trip

Also Published As

Publication number Publication date
DE3574919D1 (de) 1990-01-25
JPS6185745A (ja) 1986-05-01
EP0178250B1 (fr) 1989-12-20
CA1253909A (fr) 1989-05-09
EP0178250A3 (en) 1987-03-11
US4630017A (en) 1986-12-16

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