JP2012221868A - Circuit breaker and adaptor for circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circuit breaker and an adaptor for the circuit breaker which are not required to be installed at each of a plurality of bus bars constituting a bus bar group, which can be connected to an arbitrary bus bar in the bus bar group only by changing an insertion position of an insertion plug, which as a result can communalize a breaker for different connection systems such as single and three phase, etc.,, and which can achieve miniaturization and simplification of a distribution board, and cost reduction.SOLUTION: A circuit breaker includes: overhanging blocks 5 which overhang from a breaker body part 2 to the side thereof and have a plurality of plug insertion holes 7; and conductive plugs 8 inserted into these plug insertion holes 7. Each of the plug insertion holes 7 is conductively connected to a cut-off circuit of the breaker body part 2, and the conductive plugs 8 selectively inserted into the plurality of the plug insertion holes 7 are connected to the corresponding bus bars 91 in the power source bus group.

Description

  The present invention relates to a circuit breaker that operates against an excessive power input, and more particularly, to an AC power supply circuit breaker used in a data center and other facilities and an adapter attached to the circuit breaker.

  Conventionally, an elastic hooking claw formed on the circuit breaker mounting plate is locked into a locking hole provided at the lower rear end of the circuit breaker body as a circuit breaker, and a plug-in terminal is inserted into the bus bar to connect the circuit breaker. There is known a plug-in circuit breaker in which a breaker circuit and a bus are connected. In such a plug-in type circuit breaker, since the plug-in terminal is fitted to the bus bar so as to be inclined obliquely from above, an excessive force acts on the plug-in terminal, resulting in poor connection. Otherwise, the terminal may be damaged.

  In addition, the plug-in terminal may be deformed by a shift or inclination of the height position of the connected bus bar. In order to prevent this problem, a configuration in which a plug-in terminal is rotated is known (for example, Patent Document 1).

  Furthermore, a plug-in circuit breaker as shown in Patent Document 2 is also disclosed as a means for preventing such deformation of the plug-in terminal. According to this, it has a plug-in adapter consisting of a plug-in terminal that plug-in engages with any one of a plurality of bus bars and a plug holder that is connected to the circuit breaker body, and a pair of convex portions on the plug-in terminal The plug holder is formed with a plug-in terminal mounting opening that is loosely fitted to the convex portion and rotatably holds the plug-in terminal, and the shunt conductor is connected to the plug-in terminal and the breaker body. It is set as the structure electrically connected via.

JP 2000-2222997 A JP 2009-99405 A

  There are many types of power supplies required for distribution boards, and it is necessary to be able to cope with any of these power supplies. In response to this, circuit breakers (breakers) attached to distribution boards are required. ) Is also required to be compatible with buses of various capacities. However, conventional circuit breakers are provided for each bus corresponding to the bus of each transformer, and as the number of buses increases, the number of circuit breakers increases accordingly, and the entire distribution board becomes large. Tended to turn.

  In particular, power consumption in large-scale facilities such as data centers has been increasing in recent years. For example, the maximum power consumption of a conventional server used in a certain data center is about several hundred watts, but if this server is to be operated with a power source used conventionally, a plurality of power sources are required. When virtualization is performed in order to operate the server efficiently, the power consumption is on the order of several thousand watts. In order to meet such a demand for capacity increase, the transformer connection method in the distribution board uses three phases in addition to the conventional single phase, and the required voltage tends to increase. In addition, a distribution board in which these connection methods and voltages are mixed is often required. However, the circuit breakers connected to correspond to such connection methods and required voltage variations are different in shape and type, and many types of circuit breakers have been required for one distribution board. . Further, when manufacturing a distribution board according to an order, it is necessary to prepare a plurality of types of circuit breakers in advance in accordance with the wiring configuration of the transformer and the required voltage.

  The object of the present invention is not to install each of the plurality of buses constituting the bus group of the transformer or for each bus position to be used, and the circuit breaker for the bus groups having different single-phase and three-phase connection systems. It can be shared, multiple voltages can be drawn out, and power can be supplied in a balanced manner. Furthermore, the distribution board where the circuit breaker is installed can be reduced in size, simplified, and reduced in cost. It is to provide a circuit breaker that can be realized.

  Another object of the present invention is to provide a circuit breaker that can be easily connected to a required bus and can easily check which bus is connected from the outside.

  It is another object of the present invention to provide an adapter for a circuit breaker that is mounted on a circuit breaker main body so that a single circuit breaker can handle various types of buses such as voltage and connection form.

  In order to achieve the above object, a circuit breaker according to the present invention comprises an overhang portion having a plurality of plug insertion holes and a conductive plug inserted into the plug insertion hole, and Each of the plug insertion holes is conductively connected to a breaking circuit of the circuit breaker body block, and the conductive plugs selectively inserted into the plurality of plug insertion holes are connected to corresponding buses of the power supply bus group. It is characterized by.

  According to one form of this invention, the said extension block protrudes from the circuit breaker main-body part to the side.

  According to another aspect of the invention, the bus bar group is mounted on a plurality of bus bar mounting plates arranged in parallel, and the overhanging block is disposed so as to straddle an end of the bus bar mounting plate, The conductive plug inserted into the overhanging block is inserted into a plug insertion hole formed at an end of the bus bar mounting plate and connected to the bus bar on the mounting plate.

  According to another aspect of the present invention, the overhanging block is integrally fixed to the breaker body.

  According to another aspect of the present invention, the overhanging block is detachably attached to the circuit breaker body.

  Further, according to the present invention, there is provided an overhanging block that can be attached to the circuit breaker main body portion and formed with a plurality of plug insertion holes into which the conductive plugs are inserted. Each of the plug insertion holes is conductively connected to the breaking circuit of the circuit breaker main body, and the conductive plug inserted into the plug insertion hole is connected to a bus of the power supply bus group when mounted on the main body of the device. An adapter for a circuit breaker is provided.

  According to the present invention, it is not necessary to install each of the plurality of buses constituting the bus group, and it is possible to connect to any bus in the bus group only by changing the insertion position of the insertion plug. The distribution board can be reduced in size and simplified, and the cost can be reduced. In particular, the circuit breaker according to the present invention is useful when applied to distribution boards and transformers for AC power supplies in data centers and other facilities where various types of input buses are used.

It is a schematic front view which shows an example of the distribution board which assembled | attached the circuit breaker which concerns on this invention. It is the perspective view (A) seen from the front side of the circuit breaker which concerns on Example 1 of this invention, and the perspective view (B) seen from the rear surface side. It is the perspective view (A) seen from the front side of the circuit breaker which concerns on Example 2 of this invention, and the perspective view (B) seen from the rear surface side. It is an external appearance perspective view of the state which has arrange | positioned the circuit breaker shown in FIG. 2 facing the power bus group. It is a schematic top view which shows the state which inserted the electrically conductive plug of the circuit breaker selectively into the bus-bar mounting board of a bus-bar group. It is a front view which shows the example of arrangement | positioning of the circuit breaker by the Example of this invention with respect to a three-phase 7-wire type bus group. It is a front view which shows the example of arrangement | positioning of the circuit breaker by the Example of this invention with respect to a three-phase three-wire type bus group. It is a figure which shows the example of a connection of the three-phase 7-wire type transformer in the case of combining with the circuit breaker of this invention. It is a figure which shows the example of a connection of the three-phase three-wire type transformer in the case of combining with the circuit breaker of this invention. It is the table | surface which illustrated the relationship between the output voltage of the circuit breaker of this invention, and a bus-bar connection position. It is a graph which shows the utilization factor (transformer bank output / transformer capacity) of a transformer. It is sectional drawing which shows the connection structure with the bus-line and output terminal of the circuit breaker shown in FIG.

  Embodiments of the present invention will be described with reference to the drawings. First, the structure of the circuit breaker (breaker) according to the embodiment of the present invention will be described.

  Referring to FIG. 2, the main body 2 of the circuit breaker 1 according to the first embodiment includes a manual switch knob 3 on the front surface, which houses a breaker circuit such as a fuse, and is attached via a screw hole. For example, the output terminal 13 is fixed to an output plug on the terminal block side by being attached to a panel of a distribution board by screws.

  Two plate-like projecting blocks 5 project from the side part so as to extend outward from the side part of the circuit breaker body 2, and the rear surface (rear surface) of each projecting block 5 Is attached with a long conductive plate 6 (FIG. 2B). The conductive plate 6 is conductively connected to the interruption circuit in the main body 2. A plurality (seven in the illustrated example) of plug insertion holes 7 are penetrated from the front surface of the overhanging block 5 to the rear conductive plate 6 at an equal pitch, and the conductive plugs 8 are inserted into these plug insertion holes 7. As a result, the conductive plug 8 and the conductive plate 6 are electrically connected. The conductive plug 8 inserted into the overhanging block 5 protrudes further rearward from the conductive plate 6 on the rear surface of the block. The overhanging block 8 and the conductive plate 6 provided on the rear surface of the block 8 constitute the circuit breaker adapter 10 according to the embodiment of the present invention. In addition, this adapter 10 may be integrally fixed to the circuit breaker body 2 or may be detachably attached. If the adapter 10 is removable, it can be combined with the circuit breaker body 2 having various capacities. The adapter 10 can be attached or detached by any means for electrically connecting the conductive board 6 and the breaker circuit. For example, the adapter 10 is screwed so that the conductive board 6 is conductively connected to the breaker circuit. For example, pinching.

  In addition, the number of plug insertion holes 7 is seven in the illustrated example, but this is a three-phase seven-wire transformer and a three-phase three-wire type, which will be described later, as an example of a transformer to which the circuit breaker 1 is connected. The number of the plug insertion holes 7 is not limited to this, and can be adapted to both the bus groups of the transformer.

  With reference to FIG. 4, FIG. 5, the structure of the bus-bar mounting board 9 to which the circuit breaker 1 is connected and the connection state of the circuit breaker 1 and the bus-bar mounting board 9 are demonstrated. Behind the overhanging block 5, a plurality of bus-bar mounting plates 9 are arranged perpendicularly to the rear surface of the block 5, and these bus-bar mounting plates 9 have a plurality of buses connected to a power source via a transformer. 91 is installed. The plurality of bus-bar mounting plates 9 are arranged in parallel with each other at the same pitch as the arrangement pitch of the plug insertion holes 7 of the overhanging block 5, and the front end portion thereof is bent into an L shape, and the L-shaped bent portion 92 is electrically conductive. A plug insertion hole 93 for inserting the tip of the plug 8 is formed. Further, the bus 91 on the bus mounting plate 9 is electrically connected to the plug insertion hole 93 of the L-shaped bent portion 92 of the bus mounting plate 9, and therefore the plug of the bus mounting plate 9 is inserted from the front surface of the overhanging block 5. In a state where the conductive plug 8 is inserted into the hole 93, the bus bar at the position corresponding to the conductive plug 8 is connected to the plug plug hole 7 of the conductive plug 8 and the conductive plate 6 (FIG. 2 (B)) and the bus bar mounting plate 9. It is connected to the breaking circuit of the circuit breaker body 2 through the plug insertion hole 93 of the L-shaped bent portion 92. The conductive plug 8 can be inserted / removed from the plug insertion hole 7 of the overhanging block 5, and the insertion state and insertion position of the conductive plug 8 can be easily recognized from the front side of the overhanging block 5. When the circuit breaker 1 is connected to the bus bar mounting plate 9, the conductive plug 8 is inserted into the plug insertion hole 7 of the circuit breaker 1 corresponding to the position of the bus bar to be connected, and the plug insertion hole of the bus bar mounting plate 9 is inserted. By inserting the conductive plug 8 into 93, the circuit breaker 1 is connected to a desired bus.

  FIGS. 3A and 3B are a perspective view as viewed from the front side of the circuit breaker 11 according to the second embodiment of the present invention (FIG. 3A) and a perspective view as viewed from the rear side (FIG. 3B). It is. The circuit breaker 11 of the second embodiment is basically the same as that of the first embodiment, but in the second embodiment, the adapter 10 is mounted on the main body 2 so as to surround the breaker main body 2. . Specifically, the adapter 10 according to the second embodiment includes an adapter base 10a that surrounds the left and right sides and the top and bottom sides of the front side of the circuit breaker body 2, and two protruding from the one side of the base 10a to the side. 2 and a conductive plate (not shown) is attached to the rear surface of the extended block 10b in the same manner as in the first embodiment of FIG. 2, and from the front surface of the extended block 10b to the rear surface. A plurality (seven in the illustrated example) of plug insertion holes 7 penetrating through the conductive plate are formed at equal pitches in the block length direction. The conductive plate is electrically connected to the breaker circuit of the circuit breaker body 2, and a plurality of bus-bar mounting plates as shown in FIG. 4 are arranged on the rear side of the overhang block 10b, and the plug of the overhang block 10b is inserted. The conductive plug 8 is inserted into the hole 7 and further inserted into the plug insertion hole of the L-shaped bent portion at the front end of the bus bar mounting plate shown in FIG. It is connected to the breaker circuit of the breaker body 2 via the conductive plate. This relationship is the same as that in the first embodiment shown in FIG. In the second embodiment as well, the adapter 10 is fixedly attached to the circuit breaker main body, or is attached to the circuit breaker main body 2 so that it can be attached to and detached from the circuit breaker main body 2 as necessary. Reference numeral 3 in FIG. 3 is a switch knob provided on the front surface of the circuit breaker body 2.

  A circuit breaker 12 connected to the three-phase circuit according to the third embodiment of the present invention shown in FIGS. 6 and 7 will be described. The circuit breaker 12 has three plate-like projecting blocks 51 projecting from the side portions so as to extend outward from the side portions of the circuit breaker body, and the rear surface of each projecting block 51 A long conductive plate is attached to the rear surface. A plurality of plug insertion holes penetrate from the front surface of the overhanging block 51 to the rear conductive plate, and conductive plugs are inserted into these plug insertion holes, thereby electrically connecting the conductive plug and the conductive plate. The Since the other configuration of the circuit breaker 12 is basically the same as that of the first and second embodiments, the description thereof is omitted.

  As described above, the circuit breakers 1, 11, and 12 according to the present invention in which the adapter 10 having the plurality of plug insertion holes 7 is mounted on the circuit breaker main body 2 are arranged side by side together with the bus mounting board 9 constituting the power bus group. It is attached to the mounting wall of the electrical panel. FIG. 1 shows a distribution board 20 in which a plurality of circuit breakers 1 are mounted on the front mounting wall portion 26 in such a manner that the bus mounting plates 9 are arranged in two rows in the center in the vertical direction. In this case, the adapter 10 (projecting block 5) extended from each circuit breaker body 2 projects in front of the bus bar mounting plate 9, and each circuit breaker is placed in a horizontal state. Accordingly, the output terminals 13 on the other end side of the adapter 10 (the overhanging block 5) of the circuit breaker body 2 are also aligned for each column and connected to the distribution cable 25 via the output plug 102 and the like. This arrangement form will be further described later with reference to FIGS. 6, 7, and 10. The power source bus group is accommodated in the distribution board 20 behind the circuit breaker row so as to correspond to the breaker. The insertion plug to be inserted into the adapter 10 of the circuit breaker 1 and the insertion position thereof are easily visible from the front side of the distribution board 20.

  Further, the connection structure of each circuit breaker 1 will be described with reference to FIG. 12. The input side of the circuit breaker 1 is connected to the plug insertion hole 93 of the bus 91 to be selected and the corresponding plug insertion hole 7 of the projecting block 5. In the state in which the conductive plug 8 is inserted into the bus bar mounting plate 9, it is plugged in and connected. The output terminal 13 of the circuit breaker 1 is electrically connected to the output terminal block 101 by inserting an output plug 102 fixed on the output terminal block 101 side. An alarm probe 103 and a current transformer 105 are mounted on the substrate 104 connected to the output terminal block. Each device including the circuit breaker 1 for wiring is fixed to the mounting wall portion 26 of the distribution board 20 via the substrate 104 and the terminal block 106.

  Next, an example of a suitable transformer combined with the circuit breakers 1, 11, and 12 of the present invention and a connection example of the circuit breaker to this will be described.

  FIG. 8 is a diagram showing a connection state of a three-phase seven-wire transformer to be combined with a circuit breaker according to an embodiment of the present invention. Seven wirings of the three-phase seven-wire transformer circuit Constitutes the bus 91. This three-phase seven-wire transformer circuit is a four-wire Δ-Y connection, and in addition to the three-phase load (210V), the primary-side connection is drawn from the middle of the secondary-side connection circuit to provide a single-phase load (105V). ). By using this three-phase seven-wire transformer circuit, the combination of 100V, 200V and single-phase and three-phase can be extracted freely, and the capacity of the transformer can be used 100% efficiently as shown in FIG. Is possible.

  FIG. 10A shows a schematic example of the output voltage and bus connection position of this three-phase seven-wire transformer circuit. The row in FIG. 10 (A) corresponds to the bus bar position, that is, the corresponding plug insertion holes 7 (1) to (7). The single-phase 100V is drawn from the bus of 100V (U) and the neutral wire (N) in the circuit shown in FIG. 8, and the plug insertion hole 7 of the corresponding circuit breaker 1 (( The conductive plug 8 is inserted at the locations 1) and (4). The single-phase 200V is drawn from the 200V (U) and 200V (V) buses, and the conductive plugs 8 are inserted into the corresponding plug insertion holes 7 at the positions (5) and (6). The three-phase 200V is drawn from 200V (U), 200V (V), and 200V (W), and the corresponding plug insertion holes 7 of the circuit breaker 12 for the three-phase circuit (5) (6) (7) The conductive plug 8 is inserted into the place.

  FIG. 6 is a front view showing an arrangement example of the circuit breaker 1 with respect to the three-phase seven-wire bus group of the transformer. In this example, the above-described connection example is applied, for example, from the primary side Δ connection (173V, 100V, 100V) and the secondary side Y connection (200V, 200V, 200V), for example, the output side of the first column 23a outputs two systems of single-phase 200V output and two systems of single-phase 100V output, and on the output side 23b of the second row, one system of single-phase 200V output and one system of three-phase 200V output This is an arrangement example in which one system of single-phase 100V output is drawn out with good phase balance, and six circuit breakers 1 and one circuit breaker 12 for a three-phase circuit are used. 6, two single-phase 200V outputs (conductive plug 8 connection positions u1, v1), (u1, w1) circuit breakers 1a, 1b on one side so as to sandwich the three-phase seven-wire bus group 91, Two circuit breakers 1c and 1d of single-phase 100V output (u2, n), (w2, n) are arranged, and one single-phase 200V output (v1, w1) circuit breaker 1e on the other side. And a single three-phase 200V output (u1, v1, w1) circuit breaker 12 and a single-phase 100V output (v2, n) circuit breaker 1f, And the adapter 10 so that the overhanging block 5 of the adapter 10 extends over the end portion of the bus group 91 and the L-shaped bent portion of each bus bar mounting plate of the bus group described with reference to FIGS. The plug insertion hole 7 is extended so as to be aligned. Both overhanging blocks 5 extended from both sides of the bus group are arranged so as to engage with each other.

  By selecting the plug insertion hole 7 of the adapter 10 in the arrangement configuration shown in FIG. 6 and inserting a conductive plug into the plug insertion hole 7, a necessary bus line is connected to the circuit breaker. A plug insertion hole 7 indicated by a black circle in FIG. 6 is a place where the conductive plug 8 is inserted.

  FIG. 9 is a diagram showing a connection state of a three-phase three-wire transformer combined with a circuit breaker according to an embodiment of the present invention, and six wirings of this three-phase three-wire transformer circuit Constitutes the bus 94. This three-phase three-wire transformer circuit is a transformer circuit in which the secondary side is composed of two windings of a 100V Δ connection and a 200V Δ connection with respect to the primary Δ connection. By using this three-phase three-wire transformer circuit, the combination of 100V, 200V and single-phase and three-phase can be freely extracted, and the capacity of the transformer can be efficiently used 100% as shown in FIG. Is possible. In addition, since this transformer circuit is not grounded, it is a transformer suitable for use in a facility where it is desired to suppress the influence on other electronic devices such as hospitals.

  A schematic example of the output voltage and bus connection position of the three-phase three-wire transformer circuit is shown in FIG. 10 (B). The rows in FIG. 10B correspond to the bus bars and the corresponding plug insertion holes 7 (1) to (7). Since this three-phase three-wire transformer circuit does not have a neutral wire, the position (4) of the plug insertion holes 7 (1) to (7) is not used. Since the single-phase 100V is drawn from the buses of 100V (U) and 100V (V) in the circuit shown in FIG. 9, (1) of the plug insertion hole 7 of the corresponding circuit breaker 1 as shown in FIG. ) And (2), the conductive plug 8 is inserted. Further, since the single-phase 200V is drawn from the 200V (U) and 200V (V) bus bars, the conductive plugs 8 are inserted into the corresponding plug insertion holes 7 at the locations (5) and (6). Also, since the three-phase 200V is drawn from 200V (U), 200V (V), and 200V (W), the corresponding plug insertion holes 7 of the circuit breaker 12 for the three-phase circuit (5) (6) (7) The conductive plug 8 is inserted into the position.

  FIG. 7 is a front view showing an arrangement example of the circuit breaker 1 according to the present invention with respect to two three-phase three-wire bus groups. In this example, by applying the above-described connection example, two lines of single-phase are connected, for example, from the primary side Δ connection (100V) and the secondary side Δ connection (200V) to the output side 24a of the first row. 200V output, two single-phase 100V outputs, one line 200V, one three-phase 200V output, one single-phase 100V output, one line on the output side 24b of the second row This is an arrangement example in which three-phase 100V is drawn out with good phase balance, and six circuit breakers 1 and two circuit breakers 12 for three-phase circuits are used. 7, two single-phase 200V outputs (conductive plug 8 connection positions u1, v1) and (u1, w1) circuit breakers 1a, 1b on one side so as to sandwich the three-phase three-wire bus group 94, Two single-phase 100V output (u2, v2), (u2, w2) circuit breakers 1c, 1d are arranged, and one single-phase 200V output (v1, w1) circuit breaker 1e on the other side. One circuit breaker 12a with three phase 200V output (u1, v1, w1), one circuit breaker 1f with single phase 100V output (v2, w2), and one three phase 100V output ( u2, v2, w2) are arranged so that the overhanging block 5 of the adapter 10 on the circuit breaker input side extends over the end of the bus group 94, and each of the bus groups described in FIGS. Plug insertion hole of L-shaped bent part of busbar mounting plate and plug of adapter 10 The hole 7 is extended to match. Both overhanging blocks 5 extended from both sides of the bus group are arranged so as to engage with each other.

  By selecting the plug insertion hole 7 of the adapter 10 in the arrangement configuration shown in FIG. 7 and inserting the conductive plug 8 into the plug insertion hole 7, the necessary bus and the circuit breaker are connected. A plug insertion hole 7 indicated by a black circle in FIG. 7 is a place where the conductive plug 8 is inserted.

  The connection form or output voltage between the circuit breaker and the bus as described above is merely an example. Besides, the voltage and connection form of the power supply side bus (for example, YY, Y-Δ, V-reverse V connection method) Depending on the required output voltage, various connections can be realized by selecting the plug insertion hole. That is, the circuit breaker and the circuit breaker adapter of the present invention select the plug insertion hole 7 according to the provided power supply voltage, the connection method, the required output, and the phase balance derived from these, and the plug insertion hole 7 This is a highly versatile circuit breaker and circuit breaker adapter that can be plug-in connected to the bus bar 91 with the conductive plug 8 inserted in the adapter.

  As described above, according to the present invention, various forms such as voltage and connection type can be obtained by simply changing the insertion position of the conductive plug with respect to the plurality of plug insertion holes of the adapter provided in the circuit breaker or the circuit breaker body. It is not necessary to install a circuit breaker suitable for each bus as in the past, and the output voltage, number of poles, phase type, combinations of them, etc. can be freely set with a small number of circuit breakers. Can be changed. Moreover, the conventional breaker body itself can be used as it is simply by changing the adapter attached to the breaker body, and the cost of the circuit breaker and the transformer and distribution board incorporating the circuit breaker can be reduced. As shown in FIGS. 1 and 12, when arranged on the distribution board 20, circuit breakers having a common shape can be arranged without gaps, and the bus bar mounting plate 9 and the output terminal 13 are aligned. Therefore, complicated wiring is unnecessary. Therefore, the distribution board can be miniaturized and simplified.

1, 11, 12 Circuit breaker 2 Circuit breaker body 3 Switch knob 5 Overhang block 51 Overhang block 6 Conductive plate 7 Plug insertion hole 8 Conductive plug 9 Busbar mounting plate 10 Adapter 13 Output terminal 91,94 Busbar 92 L type Bending part 93 Plug insertion hole of busbar mounting plate 20 Distribution board 21 Three-phase load 22 Single-phase load 25 Distribution cable 26 Mounting wall part 101 Output terminal block 102 Output plug 103 Alarm probe 104 Substrate 105 Current transformer 106 Terminal block

Claims (6)

  An extension block having a plurality of plug insertion holes; and a conductive plug inserted into the plug insertion hole, wherein each of the plug insertion holes of the extension block is electrically connected to a cutoff circuit of the circuit breaker body. A circuit breaker characterized in that the conductive plugs connected and selectively inserted into the plurality of plug insertion holes are connected to corresponding buses of a power bus group.   The circuit breaker according to claim 1, wherein the projecting block projects from the circuit breaker main body to the side.   The bus bar group is mounted on a plurality of bus bar mounting plates arranged in parallel, and the overhanging block is arranged so as to straddle the end of the bus bar mounting plate, and the conductive plug inserted into the overhanging block The circuit breaker according to claim 1 or 2, wherein the circuit breaker is inserted into a plug insertion hole formed at an end of the bus bar mounting plate and connected to the bus bar on the mounting plate.   The circuit breaker according to any one of claims 1 to 3, wherein the overhanging block is integrally fixed to the breaker main body.   The circuit breaker according to any one of claims 1 to 3, wherein the overhanging block is detachably attached to the circuit breaker body.   The circuit breaker body can be mounted on the main body, and has a projecting block formed with a plurality of plug insertion holes into which conductive plugs are inserted, and the projecting block is mounted on the circuit breaker main body. Each of the plug insertion holes is conductively connected to the breaking circuit of the circuit breaker body, and the conductive plugs selectively inserted into the plug insertion holes are connected to the buses of the power supply bus group. Characteristic circuit breaker adapter.

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