EP3057118A1 - Mecanisme de commutation, disjoncteur de protection anti-feu et systeme - Google Patents

Mecanisme de commutation, disjoncteur de protection anti-feu et systeme Download PDF

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Publication number
EP3057118A1
EP3057118A1 EP15202018.6A EP15202018A EP3057118A1 EP 3057118 A1 EP3057118 A1 EP 3057118A1 EP 15202018 A EP15202018 A EP 15202018A EP 3057118 A1 EP3057118 A1 EP 3057118A1
Authority
EP
European Patent Office
Prior art keywords
switching mechanism
control element
protection switch
fire protection
actuator
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
EP15202018.6A
Other languages
German (de)
English (en)
Other versions
EP3057118B1 (fr
Inventor
Bernhard Schmid
Sebastian Schaich
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
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP3057118A1 publication Critical patent/EP3057118A1/fr
Application granted granted Critical
Publication of EP3057118B1 publication Critical patent/EP3057118B1/fr
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
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0264—Mountings or coverplates for complete assembled circuit breakers, e.g. snap mounting in panel
    • H01H71/0271—Mounting several complete assembled circuit breakers together
    • 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
    • H01H71/1009—Interconnected mechanisms
    • 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
    • H01H71/2463—Electromagnetic mechanisms with plunger type armatures
    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure

Definitions

  • the invention relates to a switching mechanism for a fire protection switch for switching a coupled with the fire circuit breaker circuit breaker. Furthermore, the invention relates to a fire protection switch for detecting an arc fault, which has such a switching mechanism, and a system consisting of such a fire protection switch and a coupled with the fire circuit breaker.
  • fire protection switch In electrical installation technology, the term "fire protection switch” is understood to mean a protective device for protection against a fault current caused by an arcing fault. Such arc fault protection devices are used in low-voltage networks to protect the electrical installation technology from damage due to a fault current due to a fault arc and its thermal consequences - such as cable fires.
  • An arc fault can occur, for example, at a defective point of an electrical line, such as a loose cable clamp, or due to a cable break. If the arc occurs electrically in series with an electrical load, the normal operating current is usually not exceeded because it is limited by the consumer. For this reason, the arc is not detected by a conventional overcurrent protection device, such as a fuse or a circuit breaker. This is particularly problematic at high operating currents as well as existing for a long time arc fault, since in these cases, there is a risk of fire due to the associated with the arc high temperatures.
  • the fire protection switch In order to determine whether an arc is present, the fire protection switch measures the voltage profile and the current profile over time and evaluates it by means of digital signal processing.
  • the current profile has in a fault arc characteristic, high-frequency components.
  • fire circuit breakers have relatively complex algorithms for monitoring the electrical installation as well as for detecting possible arcing faults.
  • fire protection switches In order to realize effective protection against arcing faults, additional circuit breakers against arcing faults, so-called fire protection switches, are also being used here in Germany. In contrast to the models available on the US market, however, these fire protection switches generally do not have their own isolating contacts, but are usually used as an independent module, the so-called AFD block, with a further protective device, for example a circuit breaker (so-called LS switch ) or a combined circuit breaker / residual current circuit breaker (so-called RCCB). This combination of the two devices then forms the AFDD circuit breaker. In low-voltage electrical installation technology, such protective switching devices - i.
  • Miniature circuit breakers, residual current circuit breakers or combination devices such as FI / LS or AFDD - also known as "DIN rail mounted devices". This term is due to the fact that in an electrical distribution manifold often a plurality of such modular devices are arranged side by side "in a row”.
  • the fire circuit breaker When combining a fire protection switch with the other protection switching device, on the one hand, an electrical connection of the two devices is required to realize a common feed.
  • the fire circuit breaker usually already electrical connection means which are led out of the housing of the fire circuit breaker to be electrically connected to the terminals of the further protection switching device.
  • the fire protection switch also has a mechanical coupling with the further protective switching device to transmit a generated based on a detected fault current trip signal from the fire circuit breaker to the other protection device.
  • the tripping signal is consequently sent to the further protective switching device -
  • the further protective switching device For example, a circuit breaker or a combined line protection / residual current circuit breaker - transmitted, which then causes by opening its switch contacts an interruption of the monitored circuit.
  • This trigger signal is usually mechanically realized: via a mechanical coupling device of the fire circuit breaker a rotary or linear motion is transmitted to a mechanical element of the further protective switching device, which then causes the triggering of a switching mechanism of the further protection switching device. As a result of the triggering of the switching mechanism, the isolating contacts of the further protective switching device are opened, whereby the electrical line to be monitored is interrupted.
  • a predefined minimum value for the rotary or linear movement of the coupling device is required to ensure safe triggering of the switching mechanism of the other protection device.
  • a predefined maximum value of the rotational or linear movement must not be exceeded in order to avoid damage to the coupling device or the switching mechanism of the further protective switching device.
  • the switching mechanism according to the invention for a fire protection switch for switching a further protective switching device which can be coupled to the fire protection switch has a triggering device, which in turn has a tripping coil and a tripping plunger movably mounted relative thereto. Furthermore, the switching mechanism has a coupling device for coupling the fire protection switch to the further protective switching device.
  • the coupling device in turn has an actuator element and a control element, wherein the actuator element has a first operative connection with the release tappet and a second operative connection with the control element.
  • the active compounds are designed such that when triggering the fire circuit breaker by means of the control a switching mechanism of the further protective switching device is actuated.
  • the actuator element and the control element are coupled to one another in such a way that, on the one hand, the control is co-actuated in the case of an actuation of the actuator element caused by the actuation plunger, but, on the other hand, the control element can also be moved independently of the actuator element.
  • the switching mechanism according to the invention is intended for use in a fire protection switch, which - since he has no own isolating contacts - with another protective switching device, such as a circuit breaker or a combined line protection / residual current circuit breaker, can be coupled.
  • another protective switching device such as a circuit breaker or a combined line protection / residual current circuit breaker
  • the isolating contacts of the further protective switching device can be used to interrupt the electrical line to be monitored in the event of an arc fault. If an arc fault is detected, the tripping coil is energized, whereby the movably mounted trigger plunger is moved from its triggering position to a tripped position. This movement of the trigger plunger is then applied to the actuator element and on transfer the control. Trigger plunger, actuator element and control thus form a mechanical chain of action.
  • the control element is mechanically coupled to a switching mechanism of the further protective switching device such that the switching mechanism of the further protective switching device can be actuated by the movement of the control element.
  • a caused by the switching mechanism of the further protection switching device movement of the control - for example, due to an overload, short circuit or residual current release of the further protection switching device - is, however, possible without repercussion on the actuator, ie the control is - at least in a first direction - independently of the actuator movable ,
  • the actuator element and the control element are rotatably mounted about their respective axis of rotation.
  • Both the actuator element and the control element are rotatably mounted about an axis of rotation assigned to them.
  • the linear movement of the trigger plunger is converted into a rotational movement of the actuator or the control element, which can then be transferred to the coupled, further protective switching device in a simple manner.
  • the axis of rotation of the actuator element and the axis of rotation of the control element are arranged concentrically.
  • the term "concentric bearing” is understood to mean that the axis of rotation of the actuator element is identical to the axis of rotation of the control, i. both elements are rotatable about the same axis.
  • an effective range of the trigger plunger interacts with an active contour of the actuator element to form a contact point.
  • the active region is formed as a flat surface, whereas the active contour is formed spherical so that the contact point at each angular position of the actuator has the same distance from the axis of rotation.
  • the effective range of the release plunger which cooperates with the active contour of the actuator element to form a contact point, is formed on the end face of the plunger as a flat, flat surface.
  • the surface normal of the effective region is oriented substantially parallel to a direction of movement of the trigger plunger.
  • a rotation angle range of the actuator element is limited in a first direction by a mechanical first stop.
  • connection of the switching mechanism of the rotation angle range is limited in a direction opposite to the first direction of the second direction by a mechanical second stop.
  • the rotational angle range of the actuator element is also limited in the opposite direction to the first direction, the second direction in a simple manner. This ensures that the actuator element is always in the same predefined position when the fire protection switch is ready to be triggered. The tripping accuracy of the switching mechanism is thereby further improved.
  • the switching mechanism has a spring element, which pushes the control element back into its starting position.
  • control element can, after a movement in the first direction, for example due to a triggering of the fire protection switch, be returned to its initial position, i. in its trigger-ready state, reset.
  • control has a driver, which moves along with the movement of the control element in its initial position, the actuator.
  • the actuator element With the help of the driver formed on the control element, the actuator element also returns to its ready-to-trigger state reset.
  • the actuator element By this coupling of the restoring movements of the control element and the actuator element can be dispensed with a separate return spring for the actuator.
  • the fire protection switch according to the invention for detecting an arc fault has a housing, which in turn has a front side, a front side opposite mounting side, as well as the front side and the attachment side connecting connecting sides. Furthermore, the fire circuit breaker on a switching mechanism of the type described above, which is arranged in the housing and is provided for switching a coupled with the fire circuit breaker further protective switching device, wherein a coupling device of the switching mechanism of the fire protection switch is rotatably mounted in one of the connecting sides of the housing.
  • connection side which is arranged adjacent to the further protective switching device to be coupled, makes it possible to trigger a trigger mechanism of the coupled with the fire circuit breaker further protective switching device on triggering the fire circuit breaker via the control of the coupling device, via the isolating contacts arranged there To cause interruption of the electrical line to be monitored.
  • the mechanical first stop and / or the mechanical second stop of the switching mechanism are formed as Anformung on the housing.
  • the system according to the invention has a fire protection switch of the type described above and a further protective switching device coupled to the fire protection switch.
  • the coupling of the fire circuit breaker with the further protective switching device is realized by a positive engagement of the control element in a movably mounted receiving element of the circuit breaker, so that when triggered the fire protection switch by pressing the recording coupled to the recording switching mechanism of the further protective switching device is actuated.
  • Figure 1A in this case shows the fully assembled system in which the fire protection switch 1 to another protective switching device 100, which may be formed, for example, as a circuit breaker or as a combined line protection residual current circuit breaker coupled.
  • FIG. 1B schematically shows the two protection devices 1 and 100 in perspective view before the final assembly or coupling.
  • the fire protection switch 1 in this case has a housing 2, which in turn has a front side 3, a front side 3 opposite mounting side 4, and the front and the mounting side 3 and 4 connecting connecting sides 5.
  • the further protective switching device 100 also has a housing 102, which in turn has a front side 103, a front side 103 opposite mounting side 104, and the front and the attachment side 103 and 104 connecting connecting sides 105.
  • the further protective switching device 100 has an actuating element 106, which on the front side 103 of the housing 102 of the further protective switching device 100 is arranged.
  • the fire protection switch 1 also has a control element 22, which is rotatably mounted in the connecting side 5 of the fire protection switch 1 facing the further protective switching device 100.
  • the control element 22 corresponds in this case with respect to its position with a receiving element 107, which is also rotatably mounted in the fire protection switch 1 facing the connecting side 105 of the further protective switching device 100.
  • the control 22 of the fire protection switch 1 engages positively in the receiving element 107 of the further protection switching device 100 to transmit a mechanical release signal to a switching mechanism of the further protection switching device 100 at a tripping of the fire protection switch 1.
  • FIGS. 2A and 2B the switching mechanism of the fire protection switch 1 is shown schematically in different views.
  • the switching mechanism is received and held in the housing 2 of the fire protection switch 1 and has a triggering device 10, which in turn has a tripping coil 11 and a trigger plunger 12 movably mounted relative thereto. If the trip coil 11 is energized, for example due to a detected by the fire circuit breaker 1 arc, a magnetic field is generated, which is the trigger plunger 12 of the in the FIGS. 2A and 2B shown trigger ready position in a triggered position against an actuator 21 pulls.
  • the actuator element 21 is part of a coupling device 20 (see FIGS. 4A and 4B ), which serves for coupling the fire protection switch 1 to the further protective switching device 100.
  • the actuator element 21 forms, together with the control element 22 and the spring element 25, the coupling device 20.
  • the actuator element 21 and the control element 22 are in one Connection side 5 of the housing 2 mounted coaxially or concentrically and thus have a common
  • the actuator element 21 has a first operative connection with the trigger plunger 12, as well as a second operative connection with the control element 22. These active connections are designed in such a way that when the fire protection switch 1 is triggered, for example due to a detected arc fault, the release plunger 12 is pressed to the left against the actuator element 21, whereby the actuator element 21 is rotated clockwise about its axis of rotation 24. This rotation of the actuator 21 is limited by a mechanical first stop 6, which is integrally formed on the connecting side 5 of the housing 2. Via a driver 26, which is integrally formed on the control element 22, the rotational movement of the actuator 21 is transmitted to the control element 22, which is also rotated about the rotation axis 24 in the clockwise direction. Actuator element 21 and control element 22 are thus coupled to one another in such a way that, when the actuation element 21 is actuated by the actuation plunger 12, the control element 22 is co-actuated therewith.
  • the control element 22 is rotatable beyond the stop 6, independently of the actuator element 21. This is important if the control element 21 from the outside - for example via the receiving element 107 of the further protective switching device 100 (see FIG. 1B ) is caused to rotate whose rotational angle range exceeds that of the actuator element. In this way, damage to the receiving element 107, the control element 22 or the actuator 21 by the mechanical separation of the control element 22 and actuator 21 can be avoided.
  • the maximum angle of rotation through the first mechanical Stop 6 predetermined. The rotation angle range of the control element 22 is thus limited to the maximum angle of rotation of the actuator element 21 when the movement of the actuator element 21 is initiated by a triggering of the fire protection switch 1.
  • FIG. 3 schematically shows a detailed representation of the interaction of the trigger plunger 12 with the actuator 21.
  • the actuator 21 On its - oriented toward the actuator 21 - - front side of the trigger plunger 12 has an effective range 13, which is designed as a flat, flat surface.
  • the actuator element 21 has an active contour 23, which is formed spherically (with an approximately semicircular cross-section). If the trigger plunger 12 in the event of triggering the fire circuit breaker 1 by energizing the trip coil 11 is moved from its triggering position to the left in its triggered position, so the effective range 13 of the trigger plunger 12 forms a contact point with the active contour 23 of the actuator 21.
  • the switching mechanism of the fire protection switch 1 has a mechanical second stop 7, which - as well as the mechanical first stop 6 - is formed as an molding on the housing 2 of the fire protection switch 1.
  • the spring element 25 which applies spring force required for the provision.
  • the spring element 25 is presently designed as a torsion spring (see also FIGS. 4A and 4B ). It has a first end 25-1, which is supported on a formed as a molding in the housing 2 Ein rehabilitationzapfen 8.
  • a second end 25-2 of the spring element 25 is mounted on the - also designed as a pin - driver 26 of the control element 22. If the spring element 25 is wound counterclockwise, a spring force generated thereby acts on the driver 26, whereby the control element 22 is urged in the counterclockwise direction in the direction of its triggering ready position. About the driver 26 while the actuator 21 is reset in its counter-clockwise back to its trigger ready position.
  • FIGS. 4A and 4B the coupling device 20 of the switching mechanism is shown schematically in different assembly states.
  • FIG. 4A shows the coupling device 20 in mounted design
  • FIG. 4B a corresponding exploded view of the coupling device 20 is shown schematically.
  • the coupling device 20 essentially consists of the actuator element 21, the control element 22 and the spring element 25.
  • the actuator element 21 and the control element 22 are inserted concentrically into one another, so that both parts have the same axis of rotation 24.
  • the spring element 25 is mounted before nesting, with the second end 25.2 being suspended on the driver 26.

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EP15202018.6A 2015-02-10 2015-12-22 Mecanisme de commutation, disjoncteur de protection anti-feu et systeme Active EP3057118B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015202322.2A DE102015202322A1 (de) 2015-02-10 2015-02-10 Schaltmechanik, Brandschutzschalter und System

Publications (2)

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EP3057118A1 true EP3057118A1 (fr) 2016-08-17
EP3057118B1 EP3057118B1 (fr) 2017-05-17

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DE (1) DE102015202322A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5729145A (en) 1992-07-30 1998-03-17 Siemens Energy & Automation, Inc. Method and apparatus for detecting arcing in AC power systems by monitoring high frequency noise
US6031699A (en) 1998-11-23 2000-02-29 Siemens Energy & Automation, Inc. Arc fault detector apparatus, means and system
US20090188893A1 (en) * 2008-01-29 2009-07-30 Siemens Energy & Automation, Inc. Devices, Systems, and Methods for Managing a Circuit Breaker
US20100073113A1 (en) * 2008-09-22 2010-03-25 Siemens Energy & Automation, Inc. Electromagnet Assembly Directly Driving Latch Of An Electronic Circuit Breaker
DE102012204964A1 (de) * 2012-03-28 2013-10-02 Siemens Aktiengesellschaft Schutzschaltgerät und Schutzschaltgerätanordnung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5729145A (en) 1992-07-30 1998-03-17 Siemens Energy & Automation, Inc. Method and apparatus for detecting arcing in AC power systems by monitoring high frequency noise
US6031699A (en) 1998-11-23 2000-02-29 Siemens Energy & Automation, Inc. Arc fault detector apparatus, means and system
US20090188893A1 (en) * 2008-01-29 2009-07-30 Siemens Energy & Automation, Inc. Devices, Systems, and Methods for Managing a Circuit Breaker
US20100073113A1 (en) * 2008-09-22 2010-03-25 Siemens Energy & Automation, Inc. Electromagnet Assembly Directly Driving Latch Of An Electronic Circuit Breaker
DE102012204964A1 (de) * 2012-03-28 2013-10-02 Siemens Aktiengesellschaft Schutzschaltgerät und Schutzschaltgerätanordnung

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Publication number Publication date
DE102015202322A1 (de) 2016-08-11
EP3057118B1 (fr) 2017-05-17

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