EP1918952A2 - Disjoncteur à courant de défaut - Google Patents

Disjoncteur à courant de défaut Download PDF

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Publication number
EP1918952A2
EP1918952A2 EP07118962A EP07118962A EP1918952A2 EP 1918952 A2 EP1918952 A2 EP 1918952A2 EP 07118962 A EP07118962 A EP 07118962A EP 07118962 A EP07118962 A EP 07118962A EP 1918952 A2 EP1918952 A2 EP 1918952A2
Authority
EP
European Patent Office
Prior art keywords
spring
shaft
torque
circuit breaker
current circuit
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.)
Withdrawn
Application number
EP07118962A
Other languages
German (de)
English (en)
Other versions
EP1918952A3 (fr
Inventor
Alois Bierschneider
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 EP1918952A2 publication Critical patent/EP1918952A2/fr
Publication of EP1918952A3 publication Critical patent/EP1918952A3/fr
Withdrawn legal-status Critical Current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
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor

Definitions

  • the invention relates to a residual current circuit breaker, with a by means of a handle and a subordinate switching mechanism from an OFF position to an ON position rotatable switching shaft, wherein in the ON position connected to the switching shaft and movable contact with it touches a fixed contact and such a circuit closes, and wherein in the ON position on the switching shaft by a first spring, a constant torque is exerted, which, however, the shift shaft in the ON position during the period of a blockade by the switch lock does not yield, and after quitting the blocking by the switch lock (when the handle is actuated or a relay acting on the switch lock) forces the switch shaft from the ON position towards the OFF position.
  • the first spring may be a tension or a compression spring.
  • the bias of the first spring is such that the torque it exerts becomes ever smaller as the shift shaft moves from an ON position to the OFF position. This occasionally causes the problem that the OFF position is not fully achieved. In addition, occur when turning back the shift shaft, in which the movable contact of the fixed contact away, arcs between the two contacts, which must be interrupted by the force of the spring, to which the force of the spring is often insufficient.
  • the residual current circuit breaker of the type mentioned includes a second spring, which completely pushes back the shift shaft in the OFF position. Due to the fact that the second spring urges the selector shaft completely into the OFF position, the first spring can retain the weakness of not fully shifting the selector shaft into the OFF position by its own power. Since the second spring supports the first spring, arcs are also effectively interrupted.
  • a disadvantage of the first spring of the prior art is also that the switching mechanism is loaded by the torque constantly exerted by it. If you want to avoid excessive stress on the switching mechanism, so you can make the arrangement of the second spring in an advantageous manner so that this acts differently than the first spring and in particular does not always exerts a torque on the shift shaft.
  • the arrangement may be such that the second spring engages a body rotatable with the shift shaft so as to exert no torque on the shift shaft in the ON position or exert a counteracting torque to the torque exerted by the first spring (this opposite Torque, however, may not reach the amount of torque exerted by the first spring for the remaining torque to cause it to leave the ON position).
  • the engagement of the second spring on the rotatable body may be further such that the second spring, after initiating rotation of the control shaft with the body and exceeding a critical angle, which may be greater than zero, exerts torque which increases with rotation of the control shaft , This increasing torque compensates for the torque exerted by the first spring becoming smaller and the target to fully disengage the shift shaft to spend in the OFF position, is achieved particularly effectively.
  • the second spring is supported for example on a fixedly mounted in a housing of the residual current circuit breaker holder and presses a relative to the holder movable plunger against an abutment in the rotatable with the switching shaft body.
  • the goal can be effected that in the ON position substantially no torque is exerted on the shift shaft. If the body rotates, the lever arm increases in almost constant, exerted by the second spring force, so that the torque increases to the rotatable with the switching shaft body and thus on the shift shaft itself.
  • a body 12 is connected to the switching shaft 10, on which a lever 14 is formed, which consists of electrically conductive material.
  • a contact 16 is formed.
  • Counterpart to the contact 16 is a fixed contact 18, opposite the housing 20 (shown symbolically in FIG 1) is not movable.
  • the contact 18 is connected on the housing side, and the contact 16 is connected via the lever 14 and a copper wire 22 to a terminal 24, which thus constitutes another terminal.
  • 1 illustrates an open position corresponding to the OFF position of the residual current circuit breaker.
  • the shift shaft 10 To get into the ON position, the shift shaft 10 must be rotated counterclockwise, then the lever 14 moves at the end with the contact 16 upwards, and the contact 16 is pressed against the contact 18, so that the circuit is closed. To return to the OFF position, the shift shaft must then of course be reversed rotated, namely clockwise. While switching to the ON position by an operator on a (not shown in FIG 1) handle acting on a (not shown) switching lock on the shift shaft 10, the shutdown can also be done via the handle, but also automatically be triggered by a relay acting on the switch latch. There is then no force applied by an operator available to rotate the shift shaft 10. To provide a torque serving for this purpose, a spring 26 is provided.
  • the spring 26 is designed here as a tension spring, but an embodiment as a compression spring is analogous possible.
  • the spring 26 is intended to apply the force that is necessary to bring the shift shaft 10 in the OFF position.
  • the contact 16 must be removed from the contact 18. Any resulting arcing must be interrupted.
  • the force to be applied by the spring 26 is therefore very high. It is particularly disadvantageous that the force and thus the torque exerted on the switching shaft 10 via the lever 28 decreases the further the shift shaft 10 has turned clockwise because the spring 26 then increasingly relaxes. Especially at the end of the movement is thus very little torque available, so that under certain circumstances, the OFF position is not completely reached. dampening Inter alia, the copper strands 22 act. A stronger orientation of the spring 26 can overcome the disadvantages only conditionally.
  • FIG. 2 illustrates the ON position of the residual current circuit breaker
  • FIG. 3 shows the OFF position.
  • the switching shaft 10 is rotated from FIG 1 via a switching mechanism not to be seen here.
  • the components 10 to 28 from FIG. 1 are arranged.
  • the lever 14, the contact 16, the contact 18 and the copper wire 22 can be seen, for example, in FIG. 3.
  • the body 12 is concealed with the lever 28 and the spring 26. In addition to the body 12, it is also located on the selector shaft another body 36, which has the shape of a rounded top rectangular plate. About this body 36, the compression spring 30 engages the shift shaft 10 as follows:
  • the compression spring 30 is supported in Figures 2 and 3 each at the top of a holder 38 from.
  • the holder 38 consists of a plurality of struts, which are fixedly connected to the housing 20 of the residual current circuit breaker 32.
  • the holder 38 has a recess 40 through which a plunger 42 is guided.
  • the compression spring 30 surrounds the plunger 42 over a large part of its longitudinal extent and presses on a collar 44 which is fixedly connected to the plunger 42.
  • a bearing 46 is formed, which is mounted in an abutment 48 of the plate-shaped body 36.
  • the bearing 46 presses into the anvil 48 at an angle such that the force of the compression spring 30 almost straightly a rotational axis 50 of the switching shaft 10 pierces. In this case, the total acting on the body 36 and thus the switching shaft 10 torque would be equal to 0.
  • Each curve represents a torque, in relation to the here indicated in arbitrary units rotation angle of the switching shaft 10 (and also of the body 36).
  • the position "0" corresponds to the OFF position, and the position "28" to the ON position.
  • the curve 54 represents that of the Tension spring 26 alone on the lever 28 on the shift shaft 10 exerted torque again. As the tension spring gradually relaxes when transitioning from the ON position to the OFF position, torque decreases continuously as viewed from right to left.
  • the compression spring 30 as can be easily seen on the total torque curve 58, the drop in torque 54 in the direction of the OFF position is virtually compensated.
  • the provision of the compression spring 30 as a second spring thus has the consequence that the total torque is significantly higher than the torque applied by the tension spring 26 alone, and in particular in the vicinity of the OFF position (in the curves 54, 56 and 58 in each case to the left) the total torque still remains sufficiently large, and in particular not as the torque exerted by the tension spring 26 alone drops sharply.
  • the compression spring 30 thus not only provides an additional torque, which would be advantageous in itself, but by the advantageous design of the plate-shaped body 36 with the counter-bearing 48 for the bearing 46 is a Given torque curve according to the curve 56, which acts in particular supportive when arcs between the contacts 16 and 18 must be interrupted, and also ensures that the OFF position is achieved accurately.

Landscapes

  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
EP07118962A 2006-10-31 2007-10-22 Disjoncteur à courant de défaut Withdrawn EP1918952A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200610051474 DE102006051474A1 (de) 2006-10-31 2006-10-31 Fehlerstromschutzschalter

Publications (2)

Publication Number Publication Date
EP1918952A2 true EP1918952A2 (fr) 2008-05-07
EP1918952A3 EP1918952A3 (fr) 2009-09-23

Family

ID=38988043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07118962A Withdrawn EP1918952A3 (fr) 2006-10-31 2007-10-22 Disjoncteur à courant de défaut

Country Status (2)

Country Link
EP (1) EP1918952A3 (fr)
DE (1) DE102006051474A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102368448A (zh) * 2011-09-13 2012-03-07 上海诺雅克电气有限公司 一种用于限制开关操作的锁定装置
CN104835674A (zh) * 2015-04-30 2015-08-12 国家电网公司 一种操动机构及使用该操动机构的直动式接地开关

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106206194B (zh) * 2016-09-23 2018-02-16 徐州新电高科电气有限公司 一种微断分合闸系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE420345C (de) 1925-01-23 1925-10-22 Paul Meyer A G Dr Schnellschalteinrichtung
DE1044927B (de) 1954-12-22 1958-11-27 Sachsenwerk Licht & Kraft Ag Kraftspeicherantrieb fuer elektrische Schalter
US3735073A (en) 1971-11-30 1973-05-22 Westinghouse Electric Corp Circuit interrupter with overcenter spring charging means

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1142649B (de) * 1961-01-04 1963-01-24 Sachsenwerk Licht & Kraft Ag Antriebsvorrichtung fuer elektrische Leistungsschalter
DE102006011982B4 (de) * 2005-10-26 2009-04-02 Abb Ag Elektrisches Schaltgerät
US7646270B2 (en) * 2007-05-04 2010-01-12 Eaton Corporation Electrical switching apparatus, and yoke assembly and spring assembly therefor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE420345C (de) 1925-01-23 1925-10-22 Paul Meyer A G Dr Schnellschalteinrichtung
DE1044927B (de) 1954-12-22 1958-11-27 Sachsenwerk Licht & Kraft Ag Kraftspeicherantrieb fuer elektrische Schalter
US3735073A (en) 1971-11-30 1973-05-22 Westinghouse Electric Corp Circuit interrupter with overcenter spring charging means

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102368448A (zh) * 2011-09-13 2012-03-07 上海诺雅克电气有限公司 一种用于限制开关操作的锁定装置
CN102368448B (zh) * 2011-09-13 2013-11-27 上海诺雅克电气有限公司 一种用于限制开关操作的锁定装置
CN104835674A (zh) * 2015-04-30 2015-08-12 国家电网公司 一种操动机构及使用该操动机构的直动式接地开关

Also Published As

Publication number Publication date
DE102006051474A1 (de) 2008-05-08
EP1918952A3 (fr) 2009-09-23

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