EP3561841B1 - Direktstromschutzschalter - Google Patents

Direktstromschutzschalter Download PDF

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Publication number
EP3561841B1
EP3561841B1 EP16925768.0A EP16925768A EP3561841B1 EP 3561841 B1 EP3561841 B1 EP 3561841B1 EP 16925768 A EP16925768 A EP 16925768A EP 3561841 B1 EP3561841 B1 EP 3561841B1
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EP
European Patent Office
Prior art keywords
arc
extinguishing chamber
breaker
wheels
contact
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
EP16925768.0A
Other languages
English (en)
French (fr)
Other versions
EP3561841A4 (de
EP3561841A1 (de
Inventor
Tomohiro Nakata
Minoru Kobayashi
Hiroshi Tottori
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP3561841A1 publication Critical patent/EP3561841A1/de
Publication of EP3561841A4 publication Critical patent/EP3561841A4/de
Application granted granted Critical
Publication of EP3561841B1 publication Critical patent/EP3561841B1/de
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Classifications

    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/36—Metal parts
    • H01H9/362—Mounting of plates in arc chamber
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/08—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • 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
    • H01H73/02—Details
    • H01H73/18—Means for extinguishing or suppressing arc
    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/346—Details concerning the arc formation chamber

Definitions

  • the present invention relates to a DC breaker, and particularly relates to an arc-extinguishing chamber shifting mechanism which is suitable for a DC high-speed breaker.
  • a main contact, by which a main circuit electric current is passed, and an arc contact, by which the main contact is protected, are provided at contact portions of a DC high-speed breaker of this kind.
  • the arc contact is opened and separated at a timing, which is later than a timing of the main contact, when an electric current is interrupted, whereby an arc is certainly generated at the arc contact, and it is prevented that the main contact is melted and broken by an arc, and it is prevented that an energization capability is lowered when the main contact is melted and broken.
  • an arc which is caused when an electric current is interrupted, is set at a very high temperature, so that a surrounding structure is melted and broken, and a metal powder or soot of carbide is caused.
  • a contact resistance at an adhering portion is increased, and there is a possibility in which an accident of an energization fault is caused, so that, in order to prevent the energization fault, when a maintenance and an inspection is performed, it is required that a main circuit portion is exposed, and a condition of a main contact portion is confirmed, and when a maintenance is required, an operation, by which the adhering portion is removed, is required.
  • an attaching clamp by which a hinge bar is attached to an arc-extinguishing portion, is provided, and a U-shaped clamp is attached to a frame of the DC breaker so as to be linked to the hinge bar, whereby the U-shaped clamp and the hinge bar are formed as a hinge mechanism by which the arc-extinguishing portion is formed as a single swinging arc-extinguishing portion in a state where the hinge bar is used as a center of a rotation, so that the DC breaker is configured in such a way that the contact portion is exposed when the DC breaker is inspected.
  • JP 2015-204 182 A describes a breaker including a pair of shielding side plates equipped so as to be freely loaded and unloaded in and from an arc-extinguishing chamber through a through hole provided to an outer wall of the arc-extinguishing chamber, and preventing an arc generated during a shutoff operation from blowing out to both sides, the shielding side plates being allowed to be replaced freely.
  • US 3,177,325 A describes a mechanical and electrical pivot between a removable arc chute and a stationary contact structure.
  • US 3,992,599 A describes a circuit maker and breaker having a removable arc chute for interrupting an arc formed between the movable and stationary contacts.
  • a pivotally movable interlock device is mounted in a cavity in the insulating base of the circuit maker and breaker in the region where the contact-carrying armature is movable into engagement with a magnetic yoke to close the movable contact of the circuit maker and breaker into engagement with the stationary contact.
  • the pivotally movable interlock device includes a plug-like member which is movable into the path of movement of the contact-carrying armature to prevent closure of the armature if the arc chute is not properly positioned on or is absent from the circuit maker and breaker.
  • the interlock device is actuated by a lever which is engaged by a surface on the arc chute as the arc chute is slid into proper position on the circuit maker and breaker, to thereby move the interlock device out of plugging or blocking relation to the armature.
  • the interlock device will move about its pivotal axis to interpose the interlocking plug member into the path of closing movement of the contact-carrying armature to prevent closing of the armature and thus to prevent closing of the movable contact relative to the stationary contact.
  • US 2013/037521 A1 describes an arc chute for a DC circuit breaker, which includes at least one stack of a plurality of substantially parallel metal plates, the at least one stack defining a first axis A in parallel to a stacking direction; an arc space adapted to allow an arc to extend along the first axis, wherein a second axis traversing in parallel to the metal plates the at least one stack and the arc space substantially orthogonal to the first axis.
  • the arc-extinguishing chamber is formed as a heavy object, it is dangerous that the arc-extinguishing chamber is lifted and detached by one person, so that, in order to detach the arc-extinguishing chamber from the main body of the DC breaker, it is required that a special hanging tool is prepared and a hanging device, such as a crane, is prepared, therefore, there have been problems in that a workability is worsened, and a maintenance and an inspection for the DC breaker depend on an environment of a facility. Moreover, it is required that a fastening component, by which the arc-extinguishing chamber and the main body of the DC breaker are fastened, is detached, so that there has been a problem in that many times are expended for a working operation.
  • the hinge mechanism has an advantage in which the hinge mechanism can be configured by using a simple configuration, and the hinge mechanism has an advantage in which an operation force is reduced in accordance with a moment ratio and the arc-extinguishing chamber can be shifted by using a relatively lower operation force when the arc-extinguishing chamber is rotated (shifted), and a few time is required in order to expose a contact.
  • the present invention has been made to solve the above-described problems, and an object of the invention is to be able to realize that a contact portion is easily and safely maintained and inspected in a short time at arc-extinguishing chamber shifting mechanisms of a DC breaker.
  • arc-extinguishing chamber shifting mechanisms by which the arc-extinguishing chamber can be shifted between two positions which are composed of an operation position, which is arranged at an upper portion of the contact at a fixed side and the contact at a movable side, and an inspection position at which the arc-extinguishing chamber is shifted in a horizontal direction from the operation position to expose a contact portion in order to maintain and inspect the contact portion, and an upper portion of the contact at a fixed side and the contact at a movable side is set as an open state, are provided.
  • arc-extinguishing chamber shifting mechanisms by which an arc-extinguishing chamber can be shifted from an operation position to an inspection position at which an upper portion of a contact at a fixed side and a contact at a movable side is set as an open state, whereby a DC breaker, in which contact portions can be easily maintained and inspected in a short time, can be obtained.
  • Fig. 1 is a side view, at a time when an electric current is passed, for explaining a configuration of a DC high-speed breaker which is formed as a DC breaker according to Embodiment 1 of the present invention
  • Fig. 2 is a side view, at a time when an electric current is interrupted, for explaining a configuration of an arc-extinguishing chamber of the DC high-speed breaker.
  • a DC high-speed breaker 1 (in the following descriptions, the DC high-speed breaker 1 is referred to as a breaker) includes an upper portion conductor 3 which is arranged at a lower portion of an arc-extinguishing chamber 2, a lower portion conductor 4 which is arranged at a lower side of the upper portion conductor 3, a main contact 5 at a fixed side, which is connected to the upper portion conductor 3, and a main contact 7 at a movable side, which is mounted at an end portion of a movable element 6 which is connected to the lower portion conductor 4 via a flexible conductor 32, in a state where the movable element 6 can be relatively moved.
  • the main contact 7 at a movable side is rotated and driven in a direction of the main contact 5 at a fixed side by an operation mechanism 31, in a state where a rotary shaft 10 is used as a fulcrum, whereby the main contact 7 is contacted to the main contact 5 at a fixed side, and an energized circuit is set as a connection state.
  • an electric current is passed through a passage of the upper portion conductor 3, the main contact 5 at a fixed side, the main contact 7 at a movable side, the movable element 6, and the lower portion conductor 4.
  • an overcurrent detector 8 which is arranged at the lower portion conductor 4, detects an overcurrent, and the overcurrent detector 8 is operated, and a latch 9, by which the movable element 6 is maintained when an electric current is passed, is released, whereby the movable element 6 is rotated in a state where the rotary shaft 10 is centered, and an opening-pole operation is performed.
  • the main contact 5 at a fixed side and the main contact 7 at a movable side are installed in an inner portion of the arc-extinguishing chamber 2, and arc contacts, at which an arc is generated when an electric current is interrupted, are arranged at an upper portion of a main contact portion, and the arc contacts are composed of an arc contact 11 at a fixed side and an arc contact 12 at a movable side.
  • the arc contact11 and the arc contact 12 are opened and separated at a late time after the main contacts are opened and separated, whereby an arc Ar is generated as indicated in Fig. 2 , and the arc contact11 and the arc contact 12 prevent that an arc is generated at the main contacts and the main contacts are melted and broken, and the arc contact11 and the arc contact 12 protect the main contact from an arc.
  • Arcing horns by which a generated arc is transferred and flowed so as to be guided to an upper portion of the arc-extinguishing chamber 2, are arranged at upper portions of the arc contact11 and the arc contact 12, and the arcing horns are composed of an arcing horn 13 at a fixed side and an arcing horn 14 at a movable side.
  • Grids 15 having a magnetic characteristic which are composed of magnetic objects having a thin plate shape, by which an arc voltage is enhanced and a limited electric current is interrupted in accordance with a dropped-off voltage of an electrode and an extension of an arc length, are arranged at an upper side of the arc-extinguishing chamber 2, and an arc is guided to an aggregate of the grids 15, whereby the arc is interrupted.
  • Fig. 3 is a schematic side view for explaining an operation of arc-extinguishing chamber slide shifting mechanisms which are used as arc-extinguishing chamber shifting mechanisms in the DC breaker according to the present invention, and Fig. 3 indicates a state before the arc-extinguishing chamber 2 is slid and sifted.
  • Fig. 4 is a schematic side view for explaining an operation of the arc-extinguishing chamber slide shifting mechanisms according to the present invention, and Fig. 4 indicates a state after the arc-extinguishing chamber 2 is slid and sifted.
  • Fig. 3 and Fig. 4 a right side of each of Fig. 3 and Fig.
  • Fig. 4 is a front side of the DC breaker, a left side of each of Fig. 3 and Fig. 4 is a rear side of the DC breaker. Moreover, an arrow in Fig. 4 represents a shift direction of the arc-extinguishing chamber 2.
  • Fig. 5 is a side view which indicates the arc-extinguishing chamber 2 and portions of the arc-extinguishing chamber slide shifting mechanisms in the DC breaker according to Embodiment 1.
  • Fig. 6 is a side view which indicates a main portion of the arc-extinguishing chamber 2 in the DC breaker according to Embodiment 1.
  • Fig. 7 is an oblique perspective view for explaining the arc-extinguishing chamber slide shifting mechanisms and the arc-extinguishing chamber 2 in the DC breaker according to the present invention
  • Fig. 8 is a disassembled oblique perspective view for explaining an attachment configuration of the arc-extinguishing chamber 2 and the arc-extinguishing chamber slide shifting mechanisms
  • Fig. 9 is a disassembled oblique perspective view for explaining a configuration of the arc-extinguishing chamber slide shifting mechanism at a front side of the DC breaker
  • Fig. 10 is a disassembled oblique perspective view for explaining a configuration of the arc-extinguishing chamber slide shifting mechanism at a rear side of the DC breaker.
  • Fig. 7 is an oblique perspective view for explaining a configuration after the arc-extinguishing chamber 2, and the arc-extinguishing chamber slide shifting mechanisms 17 and 18 are assembled
  • Fig. 8 is a disassembled oblique perspective view for explaining an attachment configuration of the arc-extinguishing chamber 2, and the arc-extinguishing chamber slide shifting mechanisms 17 and 18.
  • the arc-extinguishing chamber 2, and the arc-extinguishing chamber slide shifting mechanisms 17 and 18 are respectively configured as a unit, and the arc-extinguishing chamber 2, and the arc-extinguishing chamber slide shifting mechanisms 17 and 18 are linked by fastening components, such as bolts or screws, from components in a state which is indicated in Fig. 8 , whereby the arc-extinguishing chamber 2, and the arc-extinguishing chamber slide shifting mechanisms 17 and 18 are assembled as indicated in Fig. 7 .
  • Fig. 9 is a disassembled oblique perspective view for explaining a configuration of the arc-extinguishing chamber slide shifting mechanism 17 at a front side of the DC breaker.
  • an arc-extinguishing chamber attaching clamp 23 which is linked to the arc-extinguishing chamber 2
  • a fixing clamp 24 at which the rail 21 having a long hole shape is provided, are linked by using the wheel 19 which is composed of a pin.
  • the special handles 16 for a shift operation engage a grip 25 and joints 26, and the joints 26 are linked in a state where the wheel 19 is used as a rotational shaft.
  • a lock pin 27 for fixing is provided at the joints 26, and notches 28 are provided at the fixing clamp 24 in such a way that the notches 28 are engaged to the lock pin 27.
  • Fig. 10 is a disassembled oblique perspective view for explaining a configuration of the arc-extinguishing chamber slide shifting mechanism 18 at a rear side of the DC breaker.
  • an arc-extinguishing chamber attaching clamp 29, which is linked to the arc-extinguishing chamber 2, and a fixing clamp 30, at which the rail 22 having a long hole shape is provided, are linked by using the wheel 20 which is composed of a pin.
  • the rails 21 and 22 which respectively have a long hole shape, and the arc-extinguishing chamber slide shifting mechanisms 17 and 18, which are composed of the wheels 19 and 20, which are shifted on the rail 21 and the rail 22, are attached to the arc-extinguishing chamber 2, whereby a device, such as a tool or a crane, is not required, and the arc-extinguishing chamber 2 can be easily shifted in a short time, and the DC breaker can be maintained and inspected in a state where the contact portions are exposed.
  • a DC breaker includes a contact 5 at a fixed side; a contact 7 at a movable side, which is driven by an operation mechanism 31 and is separated from the contact 5 at a fixed side; and an arc-extinguishing chamber 2 which is arranged at an upper portion of the contact 5 at a fixed side and the contact 7 at a movable side; wherein arc-extinguishing chamber shifting mechanisms 17 and 18, by which the arc-extinguishing chamber 2 can be shifted between two positions which are composed of an operation position, which is arranged at an upper portion of the contact 5 at a fixed side and the contact 7 at a movable side, and an inspection position at which the arc-extinguishing chamber 2 is shifted in a horizontal direction from the operation position, and an upper portion of the contact 5 at a fixed side and the contact 7 at a movable side is set as an open state, are provided.
  • the arc-extinguishing chamber shifting mechanisms 17 and 18, in the DC breaker, according to Embodiment 1, include the wheels 19 and 20 which are provided at both sides of the arc-extinguishing chamber 2, and rails 21 and 22, which are provided at both sides of a main body of the DC breaker which includes the operation mechanism 31, for guiding shift operations of the rails 21 and 22.
  • Fig. 11 is a cross-sectional view which indicates a configuration of an arc-extinguishing chamber slide shifting mechanism in a DC breaker according to Embodiment 2 of the present invention, in a state where the arc-extinguishing chamber slide shifting mechanism is viewed from a front of the DC breaker.
  • Configurations of the other portions in the DC breaker according to Embodiment 2 are identical to configurations of the other portions in the DC breaker according to Embodiment 1.
  • Fig. 11 is a cross-sectional view for explaining a configuration by which a shift operation is limited, in a direction except for a shift direction, by a guide in order to prevent that an arc-extinguishing chamber 2 is vibrated when the arc-extinguishing chamber 2 is shifted, or the arc-extinguishing chamber 2 is dropped off when an earthquake is caused.
  • a width of an arc-extinguishing chamber attaching clamp 23 is wider than a width of a fixing clamp 24, and the arc-extinguishing chamber 2 is engaged, whereby it is limited that the arc-extinguishing chamber 2 is shifted in a lateral direction which is indicated by an arrow Aa and an arrow Ab which are viewed from a front direction of the DC breaker.
  • the arc-extinguishing chamber attaching clamp 23 and the fixing clamp 24 are linked in such a way that a wheel 19 having a round bar shape is passed through each of holes of the arc-extinguishing chamber attaching clamp 23 and the fixing clamp 24, so that it is limited that the arc-extinguishing chamber 2 is shifted in an upper-lower direction which is indicated by an arrow Ba and by an arrow Bb.
  • blocking components which block that the wheels 19 and 20 are shifted in a direction except for a direction in which the arc-extinguishing chamber 2 is shifted, are provided at the wheels 19 and 20 and rails 21 and 22.
  • Fig. 12 through Fig. 14 are side views which indicate a configuration and operations of an arc-extinguishing chamber slide shifting mechanism in a DC breaker according to Embodiment 3 of the present invention.
  • Fig. 12 indicates a state in which an arc-extinguishing chamber is locked when the DC breaker is operated
  • Fig. 13 indicates a state in which a lock of the arc-extinguishing chamber is released when the DC breaker is maintained and inspected
  • Fig. 14 indicates a state after the arc-extinguishing chamber is shifted when the DC breaker is maintained and inspected.
  • Configurations of the other portions in the DC breaker according to Embodiment 3 are identical to configurations of the other portions in the DC breaker according to Embodiment 1.
  • Fig. 12 is a side view for explaining a configuration and an operation by which an arc-extinguishing chamber 2 is fixed and an error shift operation, which is not intended, is prevented when the DC breaker is operated, in a state where a lock pin 27 is provided at special handles 16 for a shift operation.
  • the lock pin 27, which is used when the DC breaker is operated, is provided at the special handles 16 for a shift operation, and the lock pin 27 is engaged to notches 28 which are provided at a fixing clamp 24, whereby the lock pin 27 interferes with the notches 28 even if the arc-extinguishing chamber 2 tries to slide and shift, so that the arc-extinguishing chamber 2 cannot be shifted, and a shift operation of the arc-extinguishing chamber 2 is locked.
  • the special handles 16 for a shift operation are elevated in a lock release direction (a counterclockwise direction) of an arrow C which is indicted in Fig. 13 , and the special handles 16 for a shift operation are pulled in a slide shift direction of an arrow D which is indicted in Fig. 14 , in a state where the special handles 16 for a shift operation are elevated, whereby the arc-extinguishing chamber 2 can be slid and shifted.
  • an error shift operation, which is not intended, of the arc-extinguishing chamber 2 is prevented when the DC breaker is operated, and a tool is not used and a fastening component is not detached when the arc-extinguishing chamber 2 is slid and shifted, and the arc-extinguishing chamber 2 can be easily slid and shifted.
  • the arc-extinguishing chamber slide shifting mechanisms 17 and 18, in the DC breaker according to Embodiment 3, include the handles 16 for a shift operation, by which wheels 19 and 20 are operated in a shift direction of the arc-extinguishing chamber 2, and locking means (components), which are provided at the handles 16 for a shift operation, by which shift operations to an open state, which are caused in accordance with shift operations of the wheels 19 and 20, are blocked or released.
  • Fig. 15 is a cross-sectional view which indicates a configuration of an arc-extinguishing chamber slide shifting mechanism in a DC breaker according to Embodiment 4 of the present invention, in a state where the arc-extinguishing chamber slide shifting mechanism is viewed from a front of the DC breaker.
  • Configurations of the other portions in the DC breaker according to Embodiment 4 are identical to configurations of the other portions in the DC breaker according to Embodiment 1.
  • Fig. 15 is corresponding to the other form according to Embodiment 1, and although the wheel 19 is composed of one round bar in Embodiment 1, wheels 190 which are guided by rails, which respectively have a long hole shape and are provided at an arc-extinguishing chamber attaching clamp 230 and a fixing clamp 240, are composed of two round bars, in Embodiment 4, which are used as left-right different components.
  • the DC breaker is configured as described above, a function, which is similar to a function according to Embodiment 1, can be obtained, and an amount of a processing for the round bars can be reduced, and moreover, because the wheels 190 have the same configuration, the number of manufacture is increased, so that a cost for configuring the arc-extinguishing chamber slide shifting mechanism can be reduced.
  • Fig. 16 is a cross-sectional view, in which an arc-extinguishing chamber slide shifting mechanism is viewed from a front of a DC breaker, which indicates a configuration of the arc-extinguishing chamber slide shifting mechanism in the DC breaker according to Embodiment 5 of the present invention.
  • Configurations of the other portions in the DC breaker according to Embodiment 5 are identical to configurations of the other portions in the DC breaker according to Embodiment 1.
  • Fig. 16 is corresponding to the other form according to Embodiment 1, and although the arc-extinguishing chamber slide shifting mechanisms are composed of the wheels and the rails which respectively have a long hole shape, in order to slide and shift the arc-extinguishing chamber in the DC breaker according to Embodiment 1, an outer circumference portion 231a of an arc-extinguishing chamber attaching clamp 231 and an outer circumference portion 241a of a fixing clamp 241 respectively has a bent configuration as indicated by dot-and-dash line circles E, and the arc-extinguishing chamber attaching clamp 231 is slid on the fixing clamp 241, whereby a function, which is similar to a function according to Embodiment 1, can be obtained, and a processing for the wheels and the rails is not required, so that a cost for the wheels and the rails can be reduced.
  • Fig. 17 and Fig. 18 are views for explaining a configuration of a fixing clamp of an arc-extinguishing chamber slide shifting mechanism in a DC breaker according to Embodiment 6 of the present invention.
  • Configurations of the other portions in the DC breaker according to Embodiment 6 are identical to configurations of the other portions in the DC breaker according to Embodiment 1.
  • a long hole which is a rail 500 of a fixing clamp 400, is formed as a long hole 500 having a shape in which both end portions of the long hole 500 are lowered as indicated in Fig. 17 and Fig.
  • an operation force F 4 which is required for sliding and shifting the arc-extinguishing chamber 2 is set as a resultant force, in which the friction force F 3 and a force "F 2 ⁇ sin ⁇ ", which is set in accordance with the force F 2 and an angle ⁇ , are added. Therefore, it is required that the operation force F 4 is greater than the force F 2 , and a lowered width Lw for both end portions is varied, whereby the operation force F 4 can be set.
  • the operation force F 4 is set in a range in which an operator can operate the DC breaker, whereby an operational capability of the arc-extinguishing chamber 2 is not lost, and an involuntary error shift operation, which is caused in accordance with a vibration, of the arc-extinguishing chamber 2 is inhibited, and safety of the arc-extinguishing chamber 2 can be improved.
  • the rail 500 of the arc-extinguishing chamber slide shifting mechanism in the DC breaker according to Embodiment 6 is formed as the long hole which is extended in a shift direction of the arc-extinguishing chamber 2 so as to be formed at a fixed portion of the arc-extinguishing chamber slide shifting mechanism, and the both end portions of the long hole are bent toward a static position side of the arc-extinguishing chamber 2.
  • “1” is a DC high-speed breaker; "2,” an arc-extinguishing chamber; "5,” a main contact at a fixed side; “7,” a main contact at a movable side; “16,” special handles for a shift operation; “17 and 18,” arc-extinguishing chamber slide shifting mechanisms; “19 and 20,” wheels; “21 and 22,” rails; “27,” a lock pin; “28,” notches.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)

Claims (12)

  1. Gleichstrom-Schutzschalter, der Folgendes umfasst:
    einen Kontakt (5) auf einer fixierten Seite;
    einen Kontakt (7) auf einer bewegbaren Seite, der durch einen Betätigungsmechanismus (31) angesteuert wird und vom Kontakt (5) auf einer fixierten Seite getrennt ist; und
    eine Lichtbogenlöschkammer (2), die in einem oberen Abschnitt des Kontakts (5) auf einer fixierten Seite und des Kontakts (7) auf einer bewegbaren Seite angeordnet ist;
    dadurch gekennzeichnet, dass
    Lichtbogenlöschkammer-Verstellmechanismen (17, 18) bereitgestellt sind, durch die die Lichtbogenlöschkammer (2) zwischen zwei Positionen verstellbar ist, die eine Betriebsposition, die in einem oberen Abschnitt des Kontakts (5) auf einer fixierten Seite und des Kontakts (7) auf einer bewegbaren Seite angeordnet ist, und eine Prüfposition, in der die Lichtbogenlöschkammer (2) in einer horizontalen Richtung von der Betriebsposition weg verstellt ist, beinhalten, und ein oberer Abschnitt des Kontakts (5) auf einer fixierten Seite und des Kontakts (7) auf einer bewegbaren Seite als offener Zustand festgelegt ist, der einen Kontaktabschnitt freilegt, um den Kontaktabschnitt zu warten und zu prüfen.
  2. Gleichstrom-Schutzschalter nach Anspruch 1, wobei
    die Lichtbogenlöschkammer-Verstellmechanismen (17, 18) Räder (19, 20), die an der Lichtbogenlöschkammer (2) bereitgestellt sind, und Schienen (21, 22), die an einem Hauptkörper des Gleichstrom-Schutzschalters, der den Betätigungsmechanismus (31) umfasst, bereitgestellt sind, umfassen, um Verstellvorgänge der Schienen (21, 22) zu führen.
  3. Gleichstrom-Schutzschalter nach Anspruch 2, wobei
    Blockierungskomponenten, die ein Verstellen der Räder (19, 20) in eine Richtung, mit Ausnahme einer Richtung, in die die Lichtbogenlöschkammer (2) verstellt wird, blockieren, auf den Rädern (19, 20) und den Schienen (21, 22) bereitgestellt sind.
  4. Gleichstrom-Schutzschalter nach Anspruch 2, wobei
    die Lichtbogenlöschkammer-Verstellmechanismen (17, 18) Griffe (16) für einen Verstellvorgang, durch die die Räder (19, 20) in eine Verstellrichtung der Lichtbogenlöschkammer (2) betätigt werden, und Sperrmittel umfassen, die an den Griffen (16) für einen Verstellvorgang bereitgestellt sind, durch die Verstellvorgänge in den offenen Zustand, die entsprechend Verstellvorgängen der Räder (19, 20) bewirkt werden, blockiert oder gelöst werden.
  5. Gleichstrom-Schutzschalter nach Anspruch 2, wobei die Schienen (21, 22) als Langlöcher ausgebildet sind, die sich in eine Verstellrichtung der Lichtbogenlöschkammer (2) erstrecken, um an fixierten Abschnitten der Lichtbogenlöschkammer-Verstellmechanismen (17, 18) ausgebildet zu sein, und wobei beide Endabschnitte der Langlöcher in Richtung einer statischen Positionsseite der Lichtbogenlöschkammer (2) gebogen sind.
  6. Gleichstrom-Schutzschalter nach Anspruch 2, wobei in den Lichtbogenlöschkammer-Verstellmechanismen (17, 18) Lichtbogenlöschkammer-Befestigungsklemmen (23, 29), mit denen die Lichtbogenlöschkammer (2) verbunden ist, und Fixierklemmen (24, 30), an denen die Schienen (21, 22) bereitgestellt sind, unter Verwendung der Räder (19, 20) miteinander verbunden sind.
  7. Gleichstrom-Schutzschalter nach Anspruch 1, wobei
    die Lichtbogenlöschkammer-Verstellmechanismen (17, 18) Räder (19, 20) und Schienen (21, 22) umfassen, durch die Verstellvorgänge der Räder (19, 20) geführt werden, und wobei die Schienen (21, 22) als ein Paar von Langlöchern ausgebildet sind, die jeweils in einer horizontalen Richtung parallel sind und sich in eine Verstellrichtung der Lichtbogenlöschkammer (2) erstrecken, so dass sie in fixierten Abschnitten der Lichtbogenlöschkammer-Verstellmechanismen (17, 18) ausgebildet sind, und die Räder (19, 20) als Stifte ausgebildet sind, die durch die Langlöcher hindurchtreten, um mit den Langlöchern so in Eingriff zu gelangen, dass die Räder (19, 20) verschoben werden können.
  8. Gleichstrom-Schutzschalter nach Anspruch 7, wobei beide Endabschnitte der Langlöcher der Schienen (21, 22) in eine Bodenrichtung abgesenkt sind.
  9. Gleichstrom-Schutzschalter nach Anspruch 7, wobei beide Endabschnitte der Langlöcher der Schienen (21, 22) in Richtung einer statischen Positionsseite der Lichtbogenlöschkammer (2) gebogen sind.
  10. Gleichstrom-Schutzschalter nach Anspruch 8 oder 9, wobei
    in einem Zustand, in dem die Schienen (21, 22) in Bezug auf einen Boden horizontal sind, wenn eine Kraft, mit der die Lichtbogenlöschkammer (2) horizontal verschoben wird, als Betätigungskraft F1 definiert ist und eine Kraft in eine vertikale Richtung, mit der die Räder (19, 20) beaufschlagt werden, als Kraft F2 definiert ist und eine Kraft, die gemäß der Kraft F2 und einem Reibungskoeffizienten, der gemäß einem Zustand zwischen den Rädern (19, 20) und den Schienen (21, 22) festgelegt ist, beaufschlagt wird, als Reibungskraft F3 definiert ist und eine Kraft, die zum Verschieben und Verstellen der Lichtbogenlöschkammer (2) erforderlich ist, wenn die Lichtbogenlöschkammer (2) sich in einer statischen Position befindet, als Betätigungskraft F4 definiert ist und ein Winkel, für den eine Richtung der Betätigungskraft F4 als horizontale Richtung festgelegt ist, als Winkel θ definiert ist, die Betätigungskraft F4 als resultierende Kraft festgelegt ist, in der die Reibungskraft F3 und eine Kraft "F2 × sin θ", die gemäß der Kraft F2 und dem Winkel θ festgelegt ist, addiert werden.
  11. Gleichstrom-Schutzschalter nach einem der Ansprüche 7 bis 10, wobei Blockierungskomponenten, die ein Verstellen der Räder (19, 20) in eine Richtung, mit Ausnahme einer Richtung, in die die Lichtbogenlöschkammer (2) verstellt wird, blockieren, auf den Rädern (19, 20) und den Schienen (21, 22) bereitgestellt sind.
  12. Gleichstrom-Schutzschalter nach einem der Ansprüche 7 bis 11, wobei die Lichtbogenlöschkammer-Verstellmechanismen (17, 18) Griffe (16) für einen Verstellvorgang, durch die die Räder (19, 20) in eine Verstellrichtung der Lichtbogenlöschkammer (2) betätigt werden, und Sperrmittel umfassen, die an den Griffen (16) für einen Verstellvorgang bereitgestellt sind, durch die Verstellvorgänge in den offenen Zustand, die entsprechend Verstellvorgängen der Räder (19, 20) bewirkt werden, blockiert oder gelöst werden.
EP16925768.0A 2016-12-26 2016-12-26 Direktstromschutzschalter Active EP3561841B1 (de)

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CN110379665B (zh) * 2019-06-28 2021-06-08 江苏省如高高压电器有限公司 一种新型隔离负荷开关
WO2023121722A1 (en) * 2021-12-22 2023-06-29 Powell Electrical Systems, Inc. Enabling equipment to withstand and control the effects of internal arcing faults

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US3177325A (en) * 1960-12-21 1965-04-06 Ite Circuit Breaker Ltd Mechanical and electrical pivot between removable arc chute and stationary contact structure
US3992599A (en) * 1974-05-16 1976-11-16 Allis-Chalmers Corporation Interlock for arc chute of circuit maker and breaker
JPS5647352Y2 (de) * 1976-08-25 1981-11-05
DE2737933C3 (de) * 1977-08-23 1980-03-13 Siemens Ag, 1000 Berlin Und 8000 Muenchen Gehäuse für ein Gerät, insbesondere für einen Drucker
JPH0339064Y2 (de) * 1986-08-19 1991-08-16
JPS6481604A (en) * 1987-09-22 1989-03-27 Toshiba Corp Line breaker
JP3250320B2 (ja) * 1993-05-21 2002-01-28 凸版印刷株式会社 磁気遮蔽ハウジングボックス
JPH07153350A (ja) * 1993-12-02 1995-06-16 Fuji Electric Co Ltd 直流遮断器
EP2559043B1 (de) * 2010-04-16 2014-07-16 ABB Technology AG Lichtbogenkammer für einen Trennschalter, Trennschalter und Verfahren zur Montage einer Lichtbogenkammer
JP2015204182A (ja) * 2014-04-14 2015-11-16 三菱電機株式会社 遮断器

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EP3561841A1 (de) 2019-10-30
JP6250238B1 (ja) 2017-12-20

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