EP2626873B1 - Hilfsauslöser für ein elektrisches Schaltgerät sowie elektrisches Schaltgerät - Google Patents

Hilfsauslöser für ein elektrisches Schaltgerät sowie elektrisches Schaltgerät Download PDF

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Publication number
EP2626873B1
EP2626873B1 EP12191253.9A EP12191253A EP2626873B1 EP 2626873 B1 EP2626873 B1 EP 2626873B1 EP 12191253 A EP12191253 A EP 12191253A EP 2626873 B1 EP2626873 B1 EP 2626873B1
Authority
EP
European Patent Office
Prior art keywords
switching device
electrical switching
storage element
blocking
blocking element
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.)
Active
Application number
EP12191253.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2626873A1 (de
Inventor
Michael Freimuth
Jürgen Renner
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 EP2626873A1 publication Critical patent/EP2626873A1/de
Application granted granted Critical
Publication of EP2626873B1 publication Critical patent/EP2626873B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01H3/3031—Means for locking the spring in a charged state
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/36—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release
    • H01H73/42—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release reset by rotatable knob or wheel
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/12—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection

Definitions

  • the present invention relates to an auxiliary release for an electrical switching device and an electrical switching device. It is known to use auxiliary releases in electrical switching devices, in particular circuit breakers.
  • the auxiliary triggers fulfill the task of supporting a trigger of the electrical switching device when this trigger the necessary energy to trigger, especially for triggering a circuit breaker, can not afford itself.
  • Such an auxiliary release is for example from the DE 10 2009 021 754 A1 known.
  • the energy for supporting the trigger of the electrical switching device is provided by the tensioning of a spring element. This is particularly the case with circuit breakers with undervoltage and / or tripping the case in which normally magnetic triggers are used. Such a magnetic release can trigger the circuit breaker when falling below a voltage or complete lack of power, so it is an undervoltage release.
  • the trigger can trigger the circuit breaker even with an electrical current pulse. It is then a so-called voltage release.
  • the mechanical energy required for triggering, in particular for disconnecting switching contacts, is provided by means of auxiliary releases in the case of these triggers.
  • the auxiliary release for discharging energy, in particular mechanical energy must be switched off for this purpose. This mechanical energy is usually stored in a spring accumulator within the auxiliary release. Often this energy is added via the handle of the circuit breaker the auxiliary release and stored in this. When triggered, this energy is released again and to disconnect the switch contacts of the circuit breaker used.
  • auxiliary release As problematic, the installation of such auxiliary release has been found in an electrical switching device. To after the installation of the auxiliary release in a cocked position, that is provided with stored in the spring element mechanical energy to provide, it is known to tension the spring load of the auxiliary release during installation. As a result, however, the installation is difficult because this is associated in particular with an increased space requirement during installation. Another possibility is to install the auxiliary release in the electrical switching device, while this is in the on state. However, this procedure is problematic insofar as it can not guarantee the safety of the user when installing such an auxiliary release.
  • auxiliary release for an electrical switching device and an electrical switching device available, which allow a cost-effective and simple way to install an auxiliary release in a cocked position in an electrical switching device.
  • an auxiliary release for an electrical switching device for an electrical switching device, in particular a circuit breaker, wherein the electrical switching device is designed to interrupt a current flow in the event of an undervoltage and / or a current pulse in a downstream circuit, comprising a spring element, a memory element which is movable between a cocked and a relaxed position, a trigger element for triggering a triggering mechanism of the electrical switching device and an activation element, wherein the storage element in the tensioned position for storing a mechanical energy of the spring element and wherein the storage element is configured in the cocked position upon activation by the activation element for delivering the stored mechanical energy to the trigger element solved ,
  • the auxiliary release according to the invention is designed such that a movably mounted blocking element is provided, which is in operative connection in a first position with the storage element in the cocked position of the storage element, that the storage element is held by the blocking element, and that the blocking element in a second position releases
  • the mechanical energy of the spring element is stored in its cocked position.
  • the storage element can be activated by the activation element, which is in particular in operative connection with the electrical switching device, wherein upon activation, the storage element emits the stored mechanical energy to the triggering element.
  • the triggering element can be in operative connection with the electrical switching device such that, in particular by a downstream mechanism, switching contacts of the electrical switching device are disconnected and thus the current flow can be interrupted.
  • the inventively provided blocking element it is possible to the memory element in his to keep tensioned position, in particular independent of a possible activation of the storage element by the activation element.
  • the auxiliary release can be delivered in a tensioned state.
  • the inventive auxiliary release in particular the storage element of the auxiliary release according to the invention, is tensioned by the user before installation in an electrical switching device and is held by the blocking element in its cocked position. After installation of the thus-biased auxiliary release, the blocking element can be brought into its second position, in which the blocking element releases the storage element for carrying out a movement.
  • the storage element is thus no longer held in its cocked position by the blocking element, the blocking element is thus no longer in the way of movement of the storage element for dispensing the stored energy.
  • the activation element can hold the storage element in the cocked position.
  • the activation element will release the memory element in a situation in which, in particular, an undervoltage or a complete lack of voltage in the downstream circuit or a large current pulse, as present in the event of a short circuit, is applied to the electrical switching device. In such a case, a separation of the switching contacts of the electrical switching device is required for the safety of the downstream circuit and in particular the user of the downstream circuit.
  • the storage element via the trigger element can cause a separation of the switching contacts of the electrical switching device.
  • a blocking element in an auxiliary release according to the invention thus provides a particularly simple possibility vorzuspannen before the installation of the auxiliary release in an electrical switching device or to keep the storage element in a cocked position, the auxiliary release and in particular the storage element of the auxiliary release.
  • a complex voltage of the auxiliary release during installation or installation of the auxiliary release in a switched electrical switching device is not required in an auxiliary release according to the invention.
  • the storage element is designed as a rotary wheel.
  • a rotary knob in particular in conjunction with a spiral spring, is a particularly space-saving way of providing a storage element.
  • it can be ensured by a rotary wheel, especially in comparison to a moving lever, that a blockage of the storage element by foreign bodies, which penetrate into the auxiliary release and hinder movement of the storage element, occurs.
  • the blocking element has a first and a second contact surface, wherein the operative connection between the storage element and the blocking element can be produced by the contact surfaces, wherein the storage element by the first contact surface upon movement of the blocking element of the second can be brought into the first position in the tensioned position and held by the second contact surface in the first position of the blocking element, the storage element in the cocked position.
  • the memory element in a movement of the blocking element of the second in its first position by the first contact surface be taken with a positive fit.
  • the storage element is brought from its relaxed position to its cocked position and thus tensioned the spring element connected to the storage element and stored mechanical energy.
  • the second contact surface is in form-locking operative connection with the storage element.
  • the storage element is positively blocked by the second contact surface.
  • first and second contact surfaces are inclined, in particular perpendicular or approximately perpendicular, to one another.
  • a memory element embodied as a rotary wheel can have a connecting element which is provided for forming the operative connection with the blocking element.
  • This connecting element may in particular be designed as a cam.
  • This cam can be taken through the first contact surface and designed as a rotary storage element can be rotated to its cocked position.
  • the storage element will then come into contact with the second contact surface, which is inclined, in particular perpendicularly or approximately perpendicularly to the first contact surface.
  • the second contact surface In the second contact surface, the memory element is no longer stretched, but held only in its cocked position.
  • the blocking element has a contact element for producing an operative connection with the electrical switching device, in particular with a handle of the electrical switching device.
  • a contact element for producing an operative connection with the electrical switching device, in particular with a handle of the electrical switching device.
  • actuation of the blocking element is made possible by the handle of the electrical switching device.
  • Such a handle is provided on most electrical switching devices.
  • the electrical switching device will be located after the installation of the auxiliary release in its exhibition.
  • the contact element which is in operative connection with the handle of the electrical switching device, the blocking element is brought from its first position into its, the memory element releasing, second position when switching on the electrical switching device.
  • an activation of the storage element by the activation element is thus possible when the electrical switching device.
  • the blocking element via the contact element to tension the memory element again.
  • the blocking element can be brought from its releasing second position into its blocking first position via the handle of the electrical switching device.
  • the memory element is after this process again in its cocked position.
  • the activation element is designed such that the activation element can be brought into operative connection with the electrical switching device, so that at an undervoltage and / or a current pulse in a circuit downstream of the electrical switching device, the activation element activates the storage element ,
  • the downstream circuit can be monitored so that the electrical switching device in the event of an undervoltage and / or a current pulse disconnects switch contacts and thus interrupts the flow of current.
  • An inventive auxiliary release can be used to provide the energy necessary for this separation of the switching contacts.
  • the energy of the storage element of the auxiliary release can also be used for the separation of the switching contacts.
  • the active compound is in particular designed such that it is sensitive to undervoltage and / or current pulses in the downstream circuit. This can be achieved in particular by the use of an electromagnet.
  • the trigger element is designed such that the trigger element can be brought into operative connection with the electrical switching device, so that upon activation of the storage element by the triggering element in the electrical switching device interruption of the current flow effected is.
  • the additional energy of the auxiliary release can ensure that the switching contacts can be safely separated in the electrical switching device.
  • the mechanical energy is thereby from the storage element delivered to the trigger element of the invention auxiliary release.
  • This triggering element can in particular be brought into operative connection with the electrical switching device, in particular with a switching mechanism of the electrical switching device. This switching mechanism is designed to separate switching contacts in the electrical switching device from each other.
  • auxiliary release By an operative connection between the auxiliary release and the electrical switching device, in particular between the trigger element of the invention and a trigger mechanism of the electrical switching device, it can be ensured that the additional mechanical energy that can be provided by an auxiliary release according to the invention, the switching contacts of electrical switching device can also be safely separated from each other.
  • an electrical switching device for interrupting a current flow in the event of an undervoltage and / or a current pulse in a downstream circuit, comprising at least two switching contacts, via which a current can flow and at an undervoltage and / or a current pulse can be separated, an auxiliary trigger and a switching mechanism for separating the switching contacts, which can be actuated by the auxiliary release in the case of an undervoltage and / or a current pulse in the downstream circuit of the switching mechanism solved.
  • the electrical switching device according to the invention is designed such that the auxiliary release according to the first aspect of the invention is formed. All advantages, which are described in connection with an inventive auxiliary release according to the first aspect of the invention, thus of course also apply to an inventive electrical switching device having such an auxiliary release.
  • an electrical switching device has at least one electromagnet, of at least a portion of the current can be traversed, wherein the activation element of the auxiliary release is in operative connection with the electromagnet such that at an undervoltage and / or a current pulse in a circuit downstream of the electrical switching device, the activation element activates the storage element.
  • An electromagnet is sensitive to changes, especially current changes, in a downstream circuit. These changes can occur in the case of voltage fluctuations, such as those that can occur with undervoltage or completely missing voltage. Also, current pulses, such as may occur in a short circuit, represent such changes. The changes in the circuit causes a change in the magnetic field generated by the electromagnet.
  • the activation element of the auxiliary release can be activated via the existing active connection.
  • the activation element of the auxiliary release such controlled that the activation element releases the storage element of the auxiliary release.
  • the stored in the memory element of the auxiliary release mechanical energy of the spring element can then be delivered to the trigger element of the auxiliary release.
  • a connected to the trigger element of the auxiliary release downstream switching unit of the electrical switching device can then, driven by the energy provided by the auxiliary release, disconnect the switching contacts of the electrical switching device.
  • An electromagnet is a particularly common and effective way to provide an operative connection between the electrical switching device and the attached in or on the electrical switching device auxiliary release.
  • the electrical switching device has a handle, wherein the handle with the blocking element the auxiliary release is operatively connected in such a way that the blocking element can be selectively brought into the first or the second position upon actuation of the handle.
  • the blocking element can be brought from its first to its second position.
  • the storage element of the electrical auxiliary release can be released.
  • the blocking element can also be brought from its second to its first position.
  • the storage element of the auxiliary release can be brought into its cocked position and blocked there.
  • all functions of the blocking element can be operated by the handle of the electrical switching device.
  • the use of the handle of the electrical switching device for the operation of the blocking element of the auxiliary release thereby represents a particularly convenient way for the user to operate the blocking element of the auxiliary release.
  • no further switches or operating elements for operating the auxiliary release, in particular the blocking element of the auxiliary release are required.
  • the electrical switching device is a circuit breaker, in particular a molded case circuit breaker.
  • Circuit breakers are in particular electromagnetic self-switches. They can be used in particular as a circuit breaker for securing circuits against short circuit and / or overload and / or voltage fluctuations. A use as a motor protection switch is widespread. Due to the design of the electrical switching device as a circuit breaker, in particular as a molded case circuit breaker, the electrical switching device can be used in a wide range of electrical applications.
  • Fig. 1 shows a perspective view of a portion of an electrical switching device 100.
  • the auxiliary release 1 is installed.
  • the central component of the auxiliary release 1 according to the invention is a storage element 10 which, in the illustrated state, is in its cocked position 11.
  • the memory element 10 is connected via a slotted guide with the trigger element 13.
  • the memory element 10 can also be controlled by an activation element 14. Upon activation of the storage element 10 in its cocked position 11 by the activation element 14, the storage element 10 moves in a movement 12 which extends in a clockwise direction.
  • the triggering element 13 is moved in a linear movement 16, wherein a subordinate switching mechanism of the electrical switching device 100 (not shown) separates the likewise invisible switching contacts of the electrical switching device 100.
  • the activation element 14 is in this case in operative connection with an electromagnet 111 of the electrical switching device 100. With the solenoid 111 voltage fluctuations and / or current pulses in the electric switching device 100 downstream circuit can be registered. In particular, by the magnetic force of the electromagnet 111, the activation element 14 can be influenced such that it activates the memory element 10 in a critical state of the electrical switching device 100 downstream circuit.
  • a cam 15 is further arranged in one piece. This cam 15 can be in operative connection with the blocking element 20 are brought.
  • the blocking element 20 is in its first position 21.
  • a first contact surface 23 and a second contact surface 24 are arranged.
  • the cam 15 of the memory element 10 abuts against the second contact surface 24 of the blocking element 20.
  • the memory element 10 is locked in its rotational movement 12.
  • the illustrated state of the auxiliary release according to the invention thus corresponds to a state in which the auxiliary release 1 is present in the clamped state 11 of the storage element 10, wherein the auxiliary release 1 can be delivered in this state, as well as installed in an electrical switching device 100.
  • the blocking element 20 can perform a linear movement 22. If, in the illustrated state, the blocking element 20 carries out this linear movement 22 in the direction of the electromagnet 111, the storage element 10, in particular the cam 15 of the storage element 10, is released again. The storage element 10 is then held only by the activation element 14 in its cocked position 11. In the event of voltage fluctuations and / or current pulses, the activation element 14 releases the storage element 10 by activation, and the switching contacts are disconnected via the operative connection with the triggering element 13 in the electrical switching device 100.
  • the blocking element 20 which is then in its second position, moved back to its first position 21, the cam 15 of the memory element 10 is positively entrained by the first contact surface 23 of the blocking element 20 and the memory element 10 thus brought back to its cocked position 11.
  • a contact element 25 for operating the blocking element 20 is provided in particular on the blocking element 20.
  • a handle 110 of the electrical switching device is provided.
  • This handle 110 is in operative connection with the contact element 25 of the blocking element 20.
  • the electrical switching device 100 is in its exhibition. If the handle 110 is moved into the on position of the electrical switching device, that is displaced in this case in the direction of the electromagnet 111, the blocking element 20 is displaced from its mapped first position 21 in its second position via active connection produced by the contact element 25. The storage element 10 is then no longer blocked by the blocking element 20 in its cocked position 11.
  • auxiliary release 1 in particular the storage element 10 of the auxiliary release 1, is thus again ready to be activated in the case of a fluctuation in the downstream circuit via the activation element 14 and to release its stored mechanical energy again via the triggering element 13.
  • the above explanation of the embodiments describes the present invention only in the context of examples. Of course, individual features of the embodiments, if technically feasible, can be freely combined.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Relay Circuits (AREA)
EP12191253.9A 2012-02-08 2012-11-05 Hilfsauslöser für ein elektrisches Schaltgerät sowie elektrisches Schaltgerät Active EP2626873B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012201854A DE102012201854A1 (de) 2012-02-08 2012-02-08 Hilfsauslöser für ein elektrisches Schaltgerät sowie elektrisches Schaltgerät

Publications (2)

Publication Number Publication Date
EP2626873A1 EP2626873A1 (de) 2013-08-14
EP2626873B1 true EP2626873B1 (de) 2018-03-28

Family

ID=47294659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12191253.9A Active EP2626873B1 (de) 2012-02-08 2012-11-05 Hilfsauslöser für ein elektrisches Schaltgerät sowie elektrisches Schaltgerät

Country Status (4)

Country Link
US (1) US8816802B2 (zh)
EP (1) EP2626873B1 (zh)
CN (1) CN103247493B (zh)
DE (1) DE102012201854A1 (zh)

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DE202013007043U1 (de) 2013-07-31 2013-09-23 Siemens Aktiengesellschaft Hilfsauslöser für ein elektrisches Schaltgerät und elektrisches Schaltgerät
PT3257130T (pt) * 2015-02-10 2021-01-22 Esmart Tech Sa Sistema de comutação para ativar e desativar um aparelho elétrico
USD842258S1 (en) * 2016-03-29 2019-03-05 Kevin Somers Electrical circuit breaker charge cam
GB2600766B (en) * 2020-11-10 2023-01-11 Eaton Intelligent Power Ltd Operating mechanism for operating at least one contact
CN114823238B (zh) * 2022-06-29 2022-11-04 深圳市恒讯通电子有限公司 一种具备过载保护的电磁电开关

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Also Published As

Publication number Publication date
US8816802B2 (en) 2014-08-26
DE102012201854A1 (de) 2013-08-08
CN103247493B (zh) 2016-12-28
CN103247493A (zh) 2013-08-14
EP2626873A1 (de) 2013-08-14
US20130200963A1 (en) 2013-08-08

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