JP5863091B2 - Circuit breaker terminal structure - Google Patents

Description

The present invention relates to a terminal structure of a circuit breaker that is electrically connected to a bus provided in a distribution board, and more specifically, a selective terminal device that selectively connects a bus required for connection among buses of each phase. It concerns on the terminal structure of the circuit breaker which has this.

As an example of selectively connecting the circuit breaker terminal device and the bus, for example, as in Patent Document 1 and Patent Document 2, a switching device that selectively switches the bus connected to the circuit breaker terminal on the bus side. There is something provided.

In Patent Document 1, as shown in FIG. 14, bus bars (reference numerals 1, 2, and 3 in Patent Document 1) that form a main electric circuit and bus bar feet connected to terminals of a circuit breaker (Patent Document 1) 1 is provided with a switching device between the reference numerals 101, 301, 601 and the like. This switching device is provided in a hole of a long hole (reference number 602 of patent document 1) and a switching piece (reference number 8 of patent document 1) provided in a connection bar (reference number 6 of patent document 1) constituting the switching device. The position of the switching screw (reference numeral 7 in Patent Document 1) penetrated together is moved to one end or the other end of the elongated hole to select a conductor to be conducted, and the conductor connected to the terminal of the circuit breaker is switched to change the circuit. The voltage supplied to the circuit breaker is changed.

In Patent Document 2, as shown in FIG. 15, as in Patent Document 1, a bus bar (reference numerals 11, 12, and 13 of Patent Document 2) that forms a main electric circuit and a bus bar connected to a terminal of a circuit breaker Between the connecting portions (reference numerals 1301, 2001, etc. of Patent Document 2). And a screw (reference numeral 17 of patent document 2) which penetrates both a long hole provided in a feed plate (reference numeral 20 of patent document 2) and a cylindrical conductor (reference numeral 18 of patent document 2) constituting the switching device. Is moved to one end or the other end of the elongated hole, the conductor to be conducted is selected, the bus bar connected to the terminal of the circuit breaker is switched, and the voltage supplied to the circuit breaker is changed.

JP-A-9-271108 JP 2002-135912 A

In the case where the above-described switching device that selectively switches the bus connected to the terminal of the circuit breaker is provided on the bus side, there are the following problems. The switching unit in the switching device will be described with reference to FIG. 16 schematically showing. However, when attention is paid to the screw heads located in the slot portions representing the switching state, (a) The arrangement is regular, and it is possible to grasp at a glance which of the external conductors is connected to the circuit breaker. Here, with respect to (b) showing the case where the connection is switched for a part of the conductors, the way of arranging the screw heads located on the right side in the figure is different from the way of arranging the other screw heads on the left side and the central part. By looking at the condition, it can be understood that the selected conductor has changed. However, for (c), which shows the case where connections are switched for many conductors, the arrangement of the screw heads varies widely and overall is irregular, and it is very clear which conductor is connected to the circuit breaker. It will be difficult.

For this reason, when only a part of the external conductors to be connected is changed, it is easy to determine which conductor is connected to the circuit breaker, but the number of conductors whose connection has been changed As the number increases, it becomes difficult to grasp, and there is a possibility that misunderstandings are likely to occur for those who work, when making connection or checking connection conductors after connection. Also, it is difficult to easily check the voltage supplied to the circuit breaker from the bus after connection, and if an incorrect conductor is selected and connected to the circuit breaker, an unnecessary voltage is applied to the load-side circuit. In such a case, there is a risk that the wiring on the load side and the electrical equipment may be damaged. Further, since it is necessary to switch a large number of screws, improvement in workability is desired.

On the other hand, when changing the voltage, when the switching device is moved by loosening the switching screw, the bus bar feet 101 and 301 and the bus bar connection parts 2001 and 1601 remain connected to the circuit breaker. Therefore, if an unnecessary force is applied, a force is also applied to the terminal of the circuit breaker, and there is a risk that the terminal is loosened or damaged, or an electrical failure occurs.

Therefore, the present invention has been made in view of the above problems,
Even when the busbar is selectively connected by the terminal device in the circuit breaker or after the busbar is connected to the terminal device, which circuit breaker selects which bus for the multiple circuit breakers. And confirming the voltage supplied to the circuit breaker from the bus, and checking the voltage supplied to the circuit breaker directly and easily from the front side of the circuit breaker Easy to do,
Furthermore, when switching the connection state, no tools are required and workability can be improved.
The voltage selectively applied to the circuit breaker can be clearly grasped according to the position of the terminal device,
In addition, the voltage of the bus bar cannot be changed in the state where the bus bar foot or the connection part is connected to the terminal part of the circuit breaker, and electrical failure of the terminal part is less likely to occur.
It is an object of the present invention to provide a terminal structure for a circuit breaker having a selective terminal device that is unlikely to cause misidentification of a connection bus or supply voltage for a worker.

The terminal structure of the circuit breaker according to the present invention is configured to solve the above-mentioned problems, and an operation unit for turning on and off an electric circuit provided on the front side of the body of the circuit breaker, and a distribution board Movable power supply side terminal for selecting and connecting a predetermined bus among the buses of each phase of the distribution board, where the connection position of the power supply side terminal of one of the power supply side terminals that receive electricity from the bus is variable. And a voltage display unit displaying in advance a plurality of power supply voltages that can be applied in the distribution board by connecting the busbar and the power supply side terminal, and at each connection position of the movable power supply side terminal, A communication hole communicating from the front side of the container body to the movable power supply side terminal is engaged with an interlocking member interlocked with the movable power supply side terminal, and as the connection position of the movable power supply side terminal is moved, Of the voltage display, Display the power supply voltage that is not actually applied when connecting the movable power supply side terminal and the hidden plate for concealing the communication hole on the side where the movable power supply side terminal is not located, and the circuit breaker from the distribution board In the removed state, the hidden plate is interlocked with moving the movable power supply side terminal from one connection position to the other connection position, and one connection position and the other connection position of the movable power supply side terminal are: When the parallel direction of the circuit breakers is the width direction of the body, the hidden plate provided at one end and the other end of the width direction and interlocking with the movable power supply side terminal is connected to the movable power supply side terminal. When the movable power supply side terminal is located at the other end, the movable power supply side terminal is located at the one end. Was located at either end To form a contact with the wall portion to come, the communication hole on the side where actual bus to the display and the circuit breaker of the voltage actually applied to the circuit breaker from the predetermined bus in the voltage display unit are connected to an external It is preferable that the terminal structure of the circuit breaker is configured to be exposed in a visible manner.

According to this configuration, the hidden plate is interlocked with the movement of the movable power supply side terminal, which bus is actually selected according to the position of the movable power supply side terminal, and the indication of the applied voltage is displayed. Becomes visible directly from the outside. Further, the voltage supplied from the bus to the circuit breaker is determined by the movable power supply side terminal or the bus connected to the movable power supply terminal through the communication hole and the bus connected to the other power supply side terminal. The voltage between them can be easily grasped by measuring with a voltage measuring device, how much voltage is supplied from the bus to the circuit breaker, and confirmation of the voltage supplied to the circuit breaker The work can be easily and directly performed from the front side of the circuit breaker. For the operator, it is possible to provide a terminal structure of a circuit breaker that facilitates confirmation of the busbar to which the circuit breaker is connected and the supplied voltage value.

Delete

Moreover , a voltage display part can be formed over the whole surface of the said container body in the width direction, and visibility can be improved when confirming a supply voltage from the outside. In addition, the side of the hidden plate is concealed by the wall, and by integrating the hidden plate and the body, the display unit can be conspicuous and the displayed voltage value can be grasped more clearly. The terminal structure of the vessel can be provided.

As described above, according to the present invention, even when the busbar is selectively connected by the terminal device in the circuit breaker, or even after the terminal device and the busbar are connected, for the plurality of circuit breakers, Check which circuit breaker is connected to which bus, how much voltage is supplied from the bus to the circuit breaker, and confirming the voltage supplied to the circuit breaker It is easy to do directly and easily from the front side of the, can improve the workability when switching the connection state, the voltage selectively applied to the circuit breaker can be clearly grasped according to the position of the terminal device, In addition, the voltage cannot be changed when the busbar foot or connection is connected to the terminal of the circuit breaker, and the electrical failure of the terminal is unlikely to occur. Difficult to cause voltage misunderstanding It is possible to provide a terminal structure of a circuit breaker having a selected type terminal device.

The external appearance perspective view of the circuit breaker which shows 1st Embodiment is shown. The internal block diagram of the circuit breaker which concerns on the same embodiment is shown. The movable power supply side terminal part of the circuit breaker concerning the embodiment is shown. The terminal of the circuit breaker concerning the embodiment is shown. The hidden board concerning the embodiment is shown. The figure which combines the hidden board, pinion, and movable power supply side terminal part which concern on the embodiment is shown. The figure which combined the hidden board, the pinion, and movable power supply side terminal part which concern on the same embodiment with the body of a circuit breaker is shown. Each connection position of the movable power supply side terminal part which concerns on the embodiment is shown. Each connection position of the movable power supply side terminal part which concerns on the embodiment is shown. Each connection position of the movable power supply side terminal part which concerns on the embodiment is shown. The external view at the time of arranging a plurality of circuit breakers in parallel is shown. The figure showing the conventional connection state is shown. The figure showing the conventional connection state is shown. The figure which switched in several places in the conventional connection state is shown.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
(First embodiment)
First, the configuration of the circuit breaker according to the first embodiment will be described with reference to FIGS. 1 to 9.
The circuit breaker 1 according to the first embodiment is used for a single-phase three-wire commercial electric circuit. As shown in FIGS. 1 and 2, the circuit breaker is configured by overlapping cases 101a and 101b divided in the width direction when the direction in which the circuit breakers 1 are arranged in parallel is the width direction. It has a substantially box-shaped vessel. And to this vessel body, the power supply side terminal portions 102A and 102B connected to the conductors of each pole for supplying power to the circuit breaker 1, and the power supply to the load side of the circuit breaker 1 Load-side terminal portions 103A and 103B connected to the conductors of the respective poles are provided, and main conductors of the respective poles electrically connecting the power-side terminal portions 102A and 102B and the load-side terminal portions 103A and 103B. A fixed contact that is electrically connected to the power supply side and the load side, and a movable contact that is fixedly attached to each movable contact that is detachably opposed to the fixed contact, and opens and closes the movable contact. An opening / closing mechanism and a handle 104 which is connected to the opening / closing mechanism by a link and operates the opening / closing mechanism from the outside of the device body to be a first operation unit for turning on and off the electric circuit are disposed.

The surface on which the operation part of the body is provided is the front surface a, the surface facing the front surface a that is the mounting surface to the distribution board is the back surface b, and the surfaces adjacent to the front surface a and the back surface b are adjacent to each other. When the side surface is c, a communication hole 102b4 is provided to face the power supply side terminal portion 102B from the front surface a side. In the case of this embodiment, a total of two communicating holes are provided for each connection position of a movable power supply side terminal 102B and a bus bar, which will be described later.

Next, the power supply side terminal portions 102A and 102B will be described. The power supply side terminal portions 102A and 102B are provided at one end of the side surface c in the longitudinal direction of the container so as to be sandwiched between the cases 101a and 101b.

Of the power supply side terminal portions, 102A is a terminal portion (referred to as a fixed terminal portion) disposed and fixed to the container body, and 102B is an end portion on one side surface side and the other side surface in the width direction of the container body. It is a terminal portion (referred to as a movable power supply side terminal portion) disposed in a hollow portion provided on the side surface of the container so that it can continuously reciprocate between two places on the side end portion.

(Structure of movable power supply side terminal part)
On the power source side of the container body, three busbars are provided in advance in the distribution board so as to correspond to the positions of the fixedly arranged terminal portion 102A and the movable power supply side terminal portion 102B. L1, L2, and N connecting portions are disposed, the fixed terminal portion 102A is connected to the bus L2, and the movable power supply side terminal portion 102B is connected to a predetermined bus L1 in one position, In the case of the other position, it is connected to a predetermined bus N. When the movable power supply side terminal portion 102B is connected to the bus L1, a voltage of 200V is applied to the circuit breaker 1, and when the movable power supply side terminal portion 102B is connected to the bus N, the circuit breaker is applied. A voltage of 100 V is applied to 1.

Further, in order to adjust the phase balance of the single-phase three-wire system, when the fixed terminal portion 102A is connected to the bus L1, the movable power supply side terminal portion 102B is connected to the bus L2 in one position, In the case of position, it is connected to the bus N. When the movable power supply terminal portion 102B is connected to the bus L2, a voltage of 200V is applied to the circuit breaker 1, and when the movable power supply terminal portion 102B is connected to the bus N, the circuit A voltage of 100 V is applied to the circuit breaker 1.

3 and 4 show the movable power supply side terminal portion 102B and the blade receiver 102B3 accommodated in the movable power supply side terminal portion 102B. The fixed terminal portion 102A and the movable power supply side terminal portion 102B have blades formed in a shape in which a substantially U-shaped tip portion having a substantially virtue-shaped cross section is constricted as a terminal for connecting to the bus bar. The receptacle is stored. 3 and 4 show the movable power supply side terminal portion 102B and the blade receiver 102B3 accommodated in the movable power supply side terminal portion 102B. The blade holder sandwiches the bus bar at the narrowed portion and supplies power to the load side.

The movable power supply side terminal portion 102B is configured as a non-charging portion whose outer shell is not electrically connected to the blade receiver 102B3. On the front side of the outer shell, a hole 102B4 corresponding to the communication hole provided in the container is provided. When the movable power supply side terminal 102B is moved to the connection positions near one side and the other side in the width direction of the body, the communication hole and the hole 102B4 are connected to each other.
When checking the supply voltage to the circuit breaker with the handle 104 turned off after connecting the circuit breaker 1 to the bus, for example, one of the measurement pins of the voltage measurement tester is connected. The measurement is inserted into the communication hole on the side where the movable power supply side terminal portion 102B is located from the front surface a side of the container, and is brought into contact with the terminal 102B3 included in the movable power supply terminal portion 102B or the bus connected to the terminal 102B3, and the measurement By contacting the other end of the pin with the bus connected to the fixed terminal portion 102A, the voltage supplied to the circuit breaker can be measured without supplying power to the load side of the circuit breaker. . The bus connected to the fixed terminal 102A is, for example, a fixing screw for fixing the connection source of the bus by using a bus that supplies power to a circuit breaker arranged in parallel in a distribution board. May be the contact portion on the other side of the measurement pin.

Further, a rack 102B1 provided with a plurality of teeth is formed on the front surface a side of the movable power supply side terminal portion 102B, and the movement operation of the movable power supply side terminal portion 102B is transmitted to a hidden plate 105 described later. Fulfill. Further, a long rib 102B2 is provided in the width direction on the back side of the outer shell, and the movable power supply side terminal portion 102B is formed by fitting the rib 102B2 with the groove portion 101c provided on the body side. Acts as a guide when reciprocating in the width direction.

(Voltage display structure)
A voltage display 107 is provided on the front side of the container so as to be visible from the outside. The voltage display unit 107 is provided over the width direction of the container, and the voltage value that can be applied to the circuit breaker in the distribution board is classified and described in the central part. The voltage value that can be applied is a voltage value that is supplied to the circuit breaker 1 according to the connection position of the bus bar and the movable power supply side terminal portion 102B. In the case of this embodiment, the voltage value is approximately from the center to one side surface. The character of 100V, which is the first supply voltage, is displayed, and the character of 200V, which is the second supply voltage, is displayed from the approximate center to the other side surface. The voltage display unit 107 is configured by writing a voltage display on a nameplate and attaching it to a container. In addition, you may print or stamp directly on a container.

(Hidden board structure)
Next, the predetermined bus and the movable power source side terminal of the voltage display unit are engaged with the interlocking member interlocked with the movable power source side terminal portion 102B, and the connection position of the movable power source side terminal is moved. A description will be given of the display of the power supply voltage that is not actually applied at the time of connection and the concealing plate 105 that conceals the communication hole on the side where the movable power supply side terminal is not located.

The hidden plate 105 is provided on the front side of the container, and the voltage display unit 107 is located on the back side of the hidden plate 105. The concealing plate 105 includes a long rectangular base formed to be approximately half the length in the width direction of the container, and a rack 105b provided with a plurality of teeth provided on the back side of the base. I have. The rack 105b is formed wider at the end of the long rib 105b1 formed on the base than the rib 105b1, and when the rib 105b1 is fitted into the opening 101b3 provided in the container body, the rack 105b is mounted. The rack 105b functions as a guide for moving in the width direction, and the rack 105b serves as a retaining member to the front side.

The concealing plate 105 is continuously connected between two positions near the one side surface and the other side surface in the width direction of the body in conjunction with the movement of the movable power supply side terminal portion 102B by the pinion 106 described later. Move back and forth. Then, at each of the positions near one side and the other side, the voltage display unit 107, that is, the side on which the movable power supply side terminal unit 102B is not positioned, is positioned by the base on the portion serving as the back surface of the base. The voltage display portion 107 provided on the front surface a side of the device body and the communication hole located in the portion serving as the back surface of the base, that is, the communication provided on the front surface a side of the device body on the side where the selection terminal portion 102B is not located. Conceal the hole.

For this reason, from the front side of the body, the communication hole on the side where the movable power supply side terminal portion 102B is not visible cannot be seen, and the communication hole on the side where the movable power supply side terminal portion 102B is located becomes visible. For this reason, when checking the supply voltage to the circuit breaker, it can be done by inserting the measuring pin into the communication hole visible on the front side of the device body, and the unnecessary communication hole is hidden. Therefore, it is possible to prevent the measurement pin from being inserted into an incorrect communication hole.

The voltage display part located in the part which becomes the back surface of the base is concealed by the base and cannot be viewed from the front side, and the voltage display part located in the part not concealed by the base is visible from the front side. The voltage value on the concealed side is a voltage value that is not actually applied, and the voltage value exposed to the outside is a voltage value that is actually applied.

Similar to the above-described communication hole, the voltage display unit 107 located at the back side of the base is hidden by the base and cannot be seen from the front side, and the voltage display unit located at the part not hidden by the base is the front side. Visible from the side. For this reason, the supply voltage to the circuit breaker can be accurately displayed in advance at each position of the selection terminal portion 102B. Combined with the above-described concealing action by the base of the communication hole, it is easy to grasp and confirm the voltage supplied to the circuit breaker directly and easily from the front side of the circuit breaker, and it is excellent in workability The terminal structure can be provided.

Next, the pinion 106 that links the movable power supply side terminal portion 102B and the hidden plate 105 will be described.
The pinion 106 is formed by providing a plurality of teeth around the shaft 106a. The teeth are engaged with the rack 105b provided on the hidden plate 105 and the rack 105b provided on the hidden plate 105 so as to mesh with the rack 102B1 provided on the movable power supply side terminal portion 102B. It arrange | positions so that it may be located between racks 102B1 provided in 102B. The pinion 106 is disposed near the front surface of the body of the circuit breaker, with a shaft 106a pivotally supported by a bearing portion 101d formed by recessing a part of the body.

FIG. 7 shows a partial cross-sectional view of the arrangement of the hidden plate 105, the pinion 106, and the movable power supply side terminal portion 102B in the container.
As shown in FIG. 7, the pinion 106 is arranged between the hidden plate 105 and the movable power supply side terminal portion 102b, and the racks 105b and 102B1 and the shaft 106a pivotally supported by the container body are rotated. As the movable power supply terminal portion 102B is moved from one connection position to the other connection position, the hidden plate 105 is interlocked. More specifically, the hidden plate 105 linked to the movable power supply side terminal 120B is located at the other end when the movable power supply side terminal 102B is located at the one end, while the movable power supply side terminal 102B is located at the other end. Is located at the one end, and the hidden plate 105 moves in the direction opposite to the direction in which the movable power supply side terminal 102B is moved in the width direction.

Wall portions 101b10 and 101a10 that contact when the hidden plate 105 is located at one of the end portions in the width direction of the container body are formed on the front side of the container body. The protruding heights of the wall portions 101b10 and 101a10 are formed to be equal to the thickness of the side surface portion of the hidden plate 105, and when the hidden plate 105 contacts, the side surface of the hidden plate 105 is not exposed to the outside. It is configured as follows.

Next, the case of moving the position of the movable power supply side terminal portion 102B will be described with reference to FIG. As an example, FIG. 8A shows a case where the bus L2 is connected to the fixed terminal 102A and the bus N is connected to the movable power supply side terminal 102B (that is, the supplied voltage is 100V). 8 (b) shows the case where the bus L2 is connected to the fixed terminal portion 102A and the bus L1 is connected to the movable power supply side terminal portion 102B (that is, the supplied voltage is 200V).

First, FIG. 8A shows the case where the bus L2 is connected to the fixed terminal portion 102A and the bus N is connected to the movable power supply side terminal portion 102B, so the voltage value supplied to the circuit breaker is 100V. The hidden plate 105 is located at the end opposite to the movable power supply side terminal 102B in the width direction of the body, and the voltage display portion 107 on the side where the movable power supply side terminal portion 102B is located has 100V characters on the outside. It is exposed and displayed.

On the front side where the movable power supply side terminal portion 102B is located, the communication hole 101a4 and the voltage display portion 107 on the side where the movable power supply side terminal portion 102B is not located are concealed by the base of the hidden plate 105, and the movable power supply side terminal portion 102B is The communication hole 101b4 and the voltage display 107 on the side where it is located appear. In this case, the voltage display unit 107 displays 100V characters.

Next, the circuit breaker is removed from the distribution board, and the movable power supply side terminal 102B is slid from the initial position of (a) to the other side surface of (b) in a state where the bus bar is not connected to the terminal. Then, the pinion starts to rotate counterclockwise in the drawing due to the meshing of the teeth of the rack 102B1 provided on the front side of the movable power supply side terminal 102B and the pinion 106. At the same time, a force is transmitted to the rack 105b provided on the back side of the hidden plate 105 meshing with the teeth of the pinion 106, and the movement starts in a direction opposite to the direction in which the movable power supply side terminal 102B is slid. Since the rack and pinion teeth have a one-to-one correspondence, the amount of movement of the hidden plate 105 and the amount of movement of the movable power supply side terminal portion 102B are the same, and the movable power supply side terminal 102B is moved to the other side surface side. When finished, the hidden plate 105 also finishes moving from the initial position to the other side surface.

In the state of FIG. 8B, the bus L2 is connected to the fixed terminal portion 102A, and the bus L1 is connected to the movable power supply side terminal portion 102B. Therefore, the voltage value supplied to the circuit breaker is 200V. On the front side where the movable power supply side terminal portion 102B is located, the voltage display portion 107 and the communication hole 101b4 on the side where the movable power supply side terminal portion 102B is not located are concealed by the base of the hidden plate 105, and the movable power supply side terminal portion The voltage display portion 107 and the communication hole 101a4 on the side where 102B is located appear. In this case, the voltage display unit 107 displays 200V characters.

Since the movable power supply side terminal portion 102B and the hidden plate 105 are interlocked with each other and the hidden plate 105 is moved in the direction opposite to the sliding direction of the movable power supply side terminal 102B, the operator can It is easy to accurately grasp the position of the movable power supply side terminal portion, and at one position where the movable power supply side terminal portion 102B is connected to the bus, the voltage value supplied to the circuit breaker is always displayed on the front side and the movable power supply The communication hole on the side where the side terminal portion 102B is located can be exposed.

Since the display of the voltage supplied to the circuit breaker at the other position and the communication hole are configured to be concealed by being located on the back side of the concealing plate 105, the terminal portion is faced from the front side of the container body. The difference between the connected busbars can be visually confirmed as the difference in voltage display provided on the front surface of the vessel, that is, the difference in the terminal position. When the terminal device and the busbar are selectively connected, the terminal device It is easy to directly and easily determine which circuit breaker is selected and connected even after the bus is connected. In addition, since almost the entire surface on the front side of the terminal portion of the container body that is not concealed by the hidden plate 105 can be used as the voltage display portion, the voltage display portion can be taken large and the visibility is good, so that it can be connected to those who work. It is possible to provide a terminal structure of a circuit breaker that is less likely to cause misidentification of a busbar or a supply voltage and has high wiring confirmation workability.

Note that the blade holder of the movable power supply side terminal portion and the main conductor inside the circuit breaker are connected by a stranded wire, so that there is an allowance for the amount of movement so as not to hinder continuous movement in the width direction. The length is given.

Further, the voltage display in the voltage display unit may be performed by color-coding at the substantially central portion in the width direction of the body, or by describing the type of busbar to be connected in addition to the display by characters. . In order to identify the power supply voltage, the color classification may be configured such that red and white, red and black have different hues, and lightness and saturation are different. Also, the bus types may be displayed as L1, N, or a combination of color coding and character display.

In addition, when the hidden plate 105 is moved along with the movement of the movable power source side terminal 102B, it is transmitted during operation that the movable power source side terminal 102B and the hidden plate 105 have reached predetermined positions. For the purpose of making the movable power supply side terminal 102B and the concealed plate 105 easily reach the positions, the protrusions 108a1, 108a2, which get over the front side of the power supply side terminal portion 102B of the body and the back side of the concealed plate 105, respectively, 108b, 105c1, and 105c2 are provided. When the movable power supply side terminal 102B is moved in the width direction of the container, the protrusion on the back side of the hidden plate 105 that moves in conjunction with the protrusion on the front surface side of the container touches and gets over the movable power supply side terminal 102B. When moving from one position to the other, an appropriate click feeling can be obtained by overcoming the protrusion, and the operator can sensibly recognize that the movable power supply side terminal portion 102B has been switched. At the same time, the movable power supply side terminal 102B and the hidden plate 105 can easily reach a predetermined position.

Further, on the front side and the back side of the hidden plate 105, grooves 105d and 105e are provided in the width direction of the container. By providing the groove and partially reducing the thickness of the hidden plate, the hidden plate is elastically easily bent when the protrusions get over.

In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

Although the voltage display unit 107 described above is an example in which characters and colors are displayed, there is a possibility that the voltage display unit 107 may be installed in a dim place depending on the installation location of the distribution board where the circuit breaker is installed. For this reason, in view of the possibility that the positions of the voltage display unit and the second operation unit may be clearly unclear to the operator, the circuit breaker 1 has the inside of the body on the movable power supply side terminal unit 102B side. A light emitting means for obtaining power from a conductor and a conductor inside the container on the fixed terminal portion 102A side is arranged in the container, and the position of the voltage display section and the second operation section can be easily recognized by light emission of the light emitting means. You may comprise.

For example, as shown in FIG. 10, when the light emitting means 400 is arranged on the protrusion wall surface A arranged on the front side of the container, and the power supply side terminal side of the container is illuminated from the light emitting means 400. Good. Thereby, even in a dim place, the vicinity of the power display unit 107 is illuminated by the light emitting means 400, thereby improving visibility.

The light emitting means 400 obtains electric power from the conductor inside the container on the movable power supply side terminal portion 102B side and the conductor inside the container on the fixed terminal portion 102A side, so that the rectifier circuit and resistance connected to each conductor It is provided via a circuit. As the light emitting means, an LED, an EL panel, or the like may be used.

In addition, since the voltage supplied to the circuit breaker varies depending on the position of the movable power supply side terminal portion 102B, a constant current circuit is provided so that the light emitting means 400 is not destroyed due to a difference in supply voltage. The light emitting means may be configured to emit light.

Moreover, you may comprise so that LED which supplies an electric current according to the voltage provided with two or more light emission means according to the voltage supplied to a circuit breaker may be changed. By changing the light emission color of the LED, for example, a circuit may be provided so that a white LED emits light when the voltage is 100V and a red LED emits light when the voltage is 200V.

In addition, the voltage display unit 107 is configured to have transparency, and a light emitting means is provided on the back side of the voltage display unit 107 so that the front side is illuminated from the back side. It may be configured such that the color can be clearly seen from the front side.

For example, the voltage display unit 107 may be formed of a resin sheet having light permeability.

In addition, for the purpose of improving workability, the shape of the communication hole is tapered so that the measurement pin can be inserted from the front side to the back side, and the measurement pin is connected to the terminal or bus of the movable power supply side terminal portion 102B. You may make it easy to invite.

(Second Embodiment)
Next, the terminal structure of the circuit breaker according to the second embodiment will be described.
The difference from the first embodiment is that, in the first embodiment, the communication hole provided on the front side of the container body is in accordance with the position of the selection terminal portion 102B, but further, the fixed terminal portion 102A. The third communication hole corresponding to the blade receiver included in the container is provided on the front side of the container.

In the present embodiment, a conductor extended in the front direction of the container body is connected to the blade holder included in the fixed terminal portion 102A, and a hole that can contact the conductor from the front surface side is formed on the blade body. A third communication hole is formed on the front side, in front of the projection wall surface A, at a location avoiding the movement locus of the hidden plate 105. The end portion on the front side of the conductor is bent into an L shape to form a measurement pin abutting portion of the voltage measurement tester. The bent portion is arranged so that a part thereof is fitted to a rib provided on the container. When the measurement pin of the voltage measurement tester is inserted from the third communication hole, the pressing force is received by the L-shaped portion.

In this embodiment, taking FIG. 9A and FIG. 9B as an example, the communication hole on the side where the movable power supply side terminal portion 102B is not located by the hidden plate 105 according to the position of the movable power supply side terminal portion 102B. (101a4 in (a), 101b4 in (b)) is concealed, and the communication hole on the side where the movable power supply side terminal portion 102B is always exposed is exposed to the front side.

For this reason, when measuring how much voltage is supplied to the circuit breaker 1, first, the handle 104 is operated to the off side, and then the communication hole exposed on the front side of the body is exposed. Then, the measurement pin of the voltage measurement tester is inserted, that is, one of the measurement pins of the voltage measurement tester is inserted into the communication hole (101b4 or 101a4) on the side where the selection terminal portion 102B is located from the front surface a side of the body, The terminal 102B3 included in the movable power supply side terminal portion 102B or a bus connected to the terminal 102B3 is brought into contact, the other of the measurement pins is inserted into the third communication hole, and is extended from the fixed terminal portion 102A. By making contact with the measurement pin contact portion of the conductor, the supplied voltage can be measured without supplying power to the load side of the circuit breaker.

Since the communication holes that are not necessary for voltage measurement are not exposed on the front side, it is difficult for an operator to make a measurement error, and the voltage display unit 107 displays the voltage value to be supplied. When the measurement result from the measurement tester and the voltage display are different, it is easy to recognize that some abnormality has occurred, and it is possible to work on the resolution of the abnormality at an early stage. Moreover, in this embodiment, voltage measurement and insulation measurement between phases can be performed for each circuit breaker by using the third communication hole.

In FIG. 12, the figure at the time of arranging the circuit breaker of the 1st form in parallel is shown.
In any case, the type of bus connected to the circuit breaker and the supplied voltage can be clearly identified from the front side of the circuit breaker by the position of the movable power supply side terminal portion.
In this way, for each circuit breaker, in addition to easy identification of the type of bus to be connected and the magnitude of the supplied voltage, any circuit breaker can be used even when multiple circuit breakers are arranged in parallel. It is easy to directly grasp which bus is selected and connected to the circuit and what voltage is supplied to which circuit breaker.

The present invention can be applied to a normal circuit breaker provided in a distribution board, and can be applied to, for example, a three-pole circuit breaker in addition to a two-pole circuit breaker. In the case where a plurality of common terminal portions and movable power supply side terminal portions are provided, each movable power supply side terminal portion is moved in the width direction of the container in addition to the form in which each movable power supply side terminal portion is moved in the width direction of the container The moving direction may be formed so that the movable power supply side terminal portion can move in an oblique direction so as to be displaced from the front side to the back side of the body.

DESCRIPTION OF SYMBOLS 1 Circuit breaker 101a Case 101a4 Communication hole 101a10 Wall part 101b Case 101b10 Wall part 101b3 Opening part 101b4 Communication hole 101c Groove part 101d Bearing part 101e Columnar member receiving part 101f Protrusion part 101g Bearing part 101h Groove part 101i Hole part 102A Power supply side terminal part 102A Fixed terminal portion 102A1 Conductor 102B Movable power supply side terminal portion 102B1 Rack 102B2 Rib 102B3 Blade holder 102B4 Hole 102B5 Bearing portion 103 Load side terminal portion 104 Handle 105 Hidden plate 105b Rack 105b1 Rib 105c Projection portion 105d Groove portion 105e Groove portion 106 Pinion 106a Shaft 107 Voltage Display part 108a Protruding part

Claims (1)

A circuit breaker terminal structure installed on a distribution board and connected to the bus,
An operation unit for turning on and off the electric circuit provided on the front side of the body of the circuit breaker;
Movable to select and connect a predetermined bus among the buses of each phase of the distribution board where the connection position with the bus is variable for one of the power supply side terminals that receive electricity from the bus of the distribution board A power supply side terminal;
A voltage display unit that displays in advance a plurality of power supply voltages that can be applied in the distribution board by connecting the busbar and the power supply side terminal;
At each connection position of the movable power supply side terminal, a communication hole communicating from the front side of the container to the movable power supply side terminal,
Engaged with an interlocking member that is interlocked with the movable power supply side terminal, and in connection with the movement of the connection position of the movable power supply side terminal, when the predetermined bus and the movable power supply side terminal are connected in the voltage display unit. A power supply voltage that is not actually applied, and a hidden plate that conceals the communication hole on the side where the movable power supply side terminal is not located,
With the circuit breaker removed from the distribution board,
The hidden plate is interlocked with moving the movable power supply side terminal from one connection position to the other connection position,
One connection position and the other connection position of the movable power supply side terminal,
When the parallel direction of the circuit breakers is the width direction of the body,
Provided at one end and the other end in the width direction;
A hidden plate that is linked to the movable power supply side terminal is located at the other end when the movable power supply side terminal is located at the one end, and is disposed at the one end when the movable power supply side terminal is located at the other end. Position to,
In the peripheral portions at both ends in the width direction of the vessel body,
Forming a wall part that abuts when the hidden plate is located at either end;
The display of the voltage actually applied to the circuit breaker from the predetermined bus in the voltage display section, and the communication hole on the side where the bus is actually connected to the circuit breaker are visibly exposed from the outside. Circuit breaker terminal structure.

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