JP2007200641A - Circuit breaker device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit breaker device, having a leak detecting unit loaded with a leak detecting function arranged at a side face of a circuit breaker, enabling its circuit breaker to have a ground-fault interrupting function as well, while being also equipped at a side face of the circuit breaker with an external accessory as an alarm contact for notifying people outside that the circuit breaker has opened. <P>SOLUTION: With a switching mechanism part of the external accessory at the center, a switching mechanism part of the circuit breaker and that of the leak detecting unit are arrayed at right left with nearly the same interval, and the three switching mechanism parts are to be coupled with two trip cams of the same shape. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention provides a circuit breaker, in particular, a multipole circuit breaker on the side of a multipole circuit breaker in which a plurality of single-pole circuit breakers equipped with a switching mechanism for one pole and an overcurrent tripping element are stacked. In connection with the trip operation, the circuit breaker is equipped with an external attachment that informs the outside of the trip operation. Specifically, this circuit breaker is equipped with a leakage trip function or leakage detection function. is there.

  Circuit breakers such as circuit breakers for circuit breakers and earth leakage circuit breakers have a function to open and close an electric circuit by operating a handle provided in the circuit breaker, that is, not only a switch function but also an electric wire caused by an overcurrent flowing. It plays a major role of interrupting the electrical circuit to prevent electric shocks and fires caused by the burnout of the load equipment, and the leakage current. This circuit breaker can be identified by the position of the handle of the circuit breaker or the leakage indication button protruding from the circuit breaker, and by utilizing the alarm contact built into the circuit breaker, for example, in a centralized monitoring room You can get to know with a buzzer or a lamp.

  By the way, it is well known that this circuit breaker has various sizes of large and small depending on the application or current-carrying capacity, but it is particularly small circuit breaker used for domestic distribution boards. In the case, the opening / closing mechanism part related to the switch function described above or the opening / closing mechanism part is operated by detecting an overcurrent, for example, an electromagnet device, and further, the contact is opened in a limited external dimension. In reality, it is difficult to incorporate the above-mentioned alarm contact, because it is necessary to mount a device that is indispensable as a circuit breaker, such as an arc extinguishing device that cuts off the arc generated by the above. Therefore, it is known that an alarm contact is provided in a casing A that is separate from the circuit breaker, which is disposed on the side surface of the circuit breaker and connected to the opening / closing mechanism of the circuit breaker. (For example, refer to Patent Document 1). In the present specification, the “separate casing A” is hereinafter referred to as an “external attachment”.

  On the other hand, the leakage breaker that cuts off the leakage current described above has the same outer shape as the wiring breaker, that is, the leakage breaker is built in the wiring breaker, and the outer dimensions are the same as the wiring breaker. Although it is common for each company due to recent technological innovations, it is still the case that small circuit breakers are still difficult to incorporate for the same reason as described above. Therefore, components related to the main circuit such as a zero-phase current transformer are connected to the leakage detection unit arranged on the load side of the circuit breaker, and components not directly related to the main circuit such as a tripping element are connected to the circuit breaker. It is known that the earth leakage trip unit placed on the side is built in each, the earth leakage detection unit and the earth leakage trip unit are connected by a conductor, and the switching mechanism of the circuit breaker is connected to the earth leakage trip unit. (For example, refer to Patent Document 2).

  In the earth leakage breaker disclosed in Patent Document 2, since the earth leakage detection unit is disposed on the load side of the circuit breaker, it is not preferable particularly when the size of the distribution board is limited. Built-in member that constitutes a leakage detection unit in the trip unit, that is, a separate case B that contains all the members necessary for leakage detection is arranged only on the side of the circuit breaker to form a leakage breaker What is being known is also known. In the present specification, this “separate case B” will be referred to as “leakage detection unit” hereinafter.

JP-A-2005-243264 (page 4, line 31 to line 38, FIG. 1) JP 2000-197257 (left column, page 4, lines 19 to 21, lines 1 and 2)

  Small circuit breakers for home use have small external dimensions, so that functions other than those related to overcurrent interruption, i.e., the functions related to alarm contacts and earth leakage interruption, are described on the side of the circuit breaker. It was common to arrange. This is a major factor that is restricted by the combination of functions that the circuit breaker can have, compared to a circuit breaker having a relatively large outer shape, which is used for, for example, a distribution board or a power distribution board. That is, for example, it is extremely difficult to output an alarm contact in a small-sized earth leakage breaker for home use, and the actual situation is that the user's request could not be met.

  The present invention has been made to solve the above-described problems, and a leakage detection unit equipped with a leakage detection function is disposed on the side of a circuit breaker so that the circuit breaker has a leakage blocking function. However, the purpose is to obtain a circuit breaker that can also be provided on the side of the circuit breaker with an external attachment that serves as an alarm contact that informs the outside that this circuit breaker has broken. It is.

  In the circuit breaker according to the present invention, an insulating housing comprising a cover and a base, a handle having a handle portion that can be opened and closed from the outside, a stator mounted inside the insulating housing and having a fixed contact, A movable contact that contacts and separates from the stator, an opening / closing mechanism that drives the movable contact, an electromagnet device that operates the opening / closing mechanism in response to an overcurrent, and an exterior of the insulating casing A circuit breaker provided with an external terminal connected to the stator and the movable contact, and an insulating casing made of a cover and a base, and opened and closed from the outside. A handle having an operable handle portion, a stator attached to the inside of the insulating casing and having a fixed contact, a movable contact contacting and separating from the stator, and an opening / closing for driving the movable contact Mechanism and above An external appendage provided outside the edge housing and provided with an external terminal connected to the stator and the movable contact, and the insulating housing of the circuit breaker and the external attachment A connecting hole for arranging a first connecting member for connecting the switching mechanism of the circuit breaker and the switching mechanism of the external attachment is formed in the insulating housing of the appendage. In a circuit breaker, an insulated housing consisting of a cover and a base, a handle having a handle that can be operated from the outside, a zero-phase current transformer that detects the leakage current of the main circuit, and this zero-phase current transformer An electronic circuit unit that amplifies the generated signal, a tripping coil that operates according to the output of the electronic circuit unit, an opening / closing mechanism that is operated by the tripping coil, and the zero phase Located at both ends of the conductor that passes through the current transformer An earth leakage detection unit configured with an external terminal, and the insulation case of the earth leakage detection unit and the insulation case of the external attachment are respectively provided with an opening / closing mechanism portion of the earth leakage detection unit and the external attachment. A connection hole for arranging a second connection member for connecting the opening / closing mechanism of the shape appendage is formed.

  As described above, since the present invention makes it possible to capture the breaker information of the circuit breaker while having a leakage detection function, a small circuit breaker for home use that matches various needs of users. It is possible to provide a circuit breaker that uses a core.

Embodiment 1 FIG.
1 is a front view of a circuit breaker according to Embodiment 1 of the present invention, and FIG. 2 is an external perspective view of FIG. 1 disassembled for each unit. FIG. 3 is a front view of only the leakage detection unit in FIG. 4 and FIG. 5 show the internal structure of the circuit breaker and the external attachment, respectively, with the cover removed from the direction A in FIG. 1, and FIG. 6 shows the cover 33 of the leakage detection unit. FIG. 2 is an internal structure diagram seen from the B direction on the paper surface of FIG. In FIGS. 4 to 6, (a) and (b) show that (a) is a (leakage) trip state and (b) is an ON state, respectively.

  As shown in FIG. 1, a circuit breaker 101 includes a plurality of single-pole circuit breakers 1 (in this case, four pieces) laminated (hereinafter referred to as circuit breaker 1) on the right side of the drawing. An external attachment 2 serving as an alarm contact is provided on the surface, and a leakage detection unit 3 having a leakage detection function is provided on the right side of the external attachment 2 on the paper surface. . The handle 11 of the circuit breaker 1 and the handle 21 of the external attachment 2 are connected by a pin or the like (not shown), and the handle 11 is manually turned on (on the paper, from the bottom to the top) and off (on the paper, the top). The handle 21 is interlocked with the operation from the lower side. On the other hand, the handle 31 of the leakage detection unit 3 is engaged with the upper side of the handle 21 on the paper surface by an engaging portion 31 a provided on the handle 31. That is, when the handle 31 is operated in the OFF direction, the handle 11 (and 21) is also interlocked. However, when the handle 11 is OFF, the handle 31 is not interlocked and remains stationary at the ON position. However, the state shown in FIG. 1 indicates that the leakage is interrupted or the handle 31 is operated in the OFF direction (corresponding to the simulated leakage interrupt). From this, it is well known that the external terminals 14a and 14b of the circuit breaker 1 have the power supply side 14a and the load side 14b. 33a is a well-known leakage test button for confirming whether or not the leakage detection function can operate normally.

  Next, the assembly procedure of the circuit breaker 101 will be described. As shown in FIG. 2, the circuit breaker 1 and the external attachment 2 are fixed by a claw 22 b provided on the base 22 that forms the housing of the external attachment 2. The handles 11 and 21 are connected to each other. At this time, the trip cam 41 is inserted into the connection hole 22a provided in the base 22 in order to transmit the movement of an opening / closing mechanism section, which will be described later, of the circuit breaker 1 to the external attachment 2. Insert. Then, a connection hole (not shown) of the cover 13 of the circuit breaker 1 (the connection hole 12a of the base 12 (however, this connection hole 12a is not used in this embodiment, so that it is blocked) at a position opposite to the connection hole 22a. Is provided on the cover 13 side), the trip cam 41 is engaged with the opening / closing mechanism of the circuit breaker 1 through this connection hole. Thereby, when the circuit breaker 1 trips, an alarm contact can be output from the external attachment 2.

  The earth leakage detection unit 3 is further fixed to the fixed circuit breaker 1 and the external attachment 2 by a claw 32b provided on the base 32 of the earth leakage detection unit 3. The earth leakage detection unit 3 Unlike the external attachment 2, the main circuit must be connected. That is, the tip 36a of the conductor 36 whose exposure is covered by the terminal cover portion 32c extending from the base 32 of the leakage detection unit 3 is fastened to the external terminal 14b of the circuit breaker 1 by the terminal screw 14b1 (see FIG. 4). . As shown in FIG. 3, the conductor 36 is covered with, for example, an insulating tube except for the tip 36a in order to prevent a short circuit between the contacts. Then, after bending upward on the paper surface, it is U-turned, and is connected to the external terminal 34 after passing through a known zero-phase current transformer 37 that detects the leakage current of this electric circuit. As shown in FIG. 2, the base 32 is provided with a connection hole 32 a as in the external attachment 2, and the leakage cam detection unit 3 will be described later by inserting a trip cam 42 into the connection hole 32 a. The movement of the opening / closing mechanism, that is, the electric leakage operation is transmitted to the opening / closing mechanism of the external attachment 2. In this transmission, there is a connection hole (not shown) of the cover 23 of the external attachment 2 (the same as the connection hole 22a of the base 22 is also provided on the cover 23 side) at a position opposite to the connection hole 32a. What is performed by being provided is similar to the transmission between the circuit breaker 1 and the external attachment 2 described above.

However, when using the circuit breaker 101, the user connects, for example, a power supply side bar to the external terminal 14a of the circuit breaker 1, and a flexible load side wire, for example, to the external terminal 34 of the leakage detection unit 3, For example, power supply to a load such as an electric light is started. If an overcurrent or an accidental current due to a short circuit flows for some reason in this power supply state, the circuit breaker 1 cuts off the electric circuit, and transmits this interruption to the external attachment 2 to By operating the opening / closing mechanism of the shaped appendage 2, for example, a buzzer or a lamp (not shown) connected to the external terminal 24, which is installed at a remote location from the circuit breaker 101, responds. You can grasp the abnormality of the electric circuit. In addition, when a leakage occurs in this electric circuit, the opening / closing mechanism of the leakage detection unit 3 operates, and this movement is transmitted to the external attachment 2 and further to the circuit breaker 1, which is the same as when an overcurrent occurs. In addition, the circuit breaker 1 cuts off the electric circuit and outputs an alarm from the external attachment 2. In accordance with this embodiment 1, the circuit breaking apparatus 101 is RCBOs (r esidual c urrent operated circuit- b reakers with integral o vercurrent protection substantially, i.e. earth leakage breaker with an overcurrent device), external auxiliary unit 2 are respectively referred to as AL (abbreviation of al arm switch). The “first and second connecting members” described in the claims are the trip cams 41 and 42, respectively.

  Since “transmission” between the units described above is a main part of the present invention, it will be described in more detail with reference to FIGS. In FIG. 4 (a), the handle 11 is exceeded clockwise by rotating the handle 11 in the clockwise direction, and the latch 151 and the arm 152 constituting the opening / closing mechanism unit 15 have the latch pin 153 as the rotation center on the paper surface. As shown in FIG. 4B, it is well known that the movable contact 161 comes into contact with the stator 162 and can supply power to the load as it rotates counterclockwise. If an overcurrent occurs in this closed state, although not described in detail, the bimetal 17 or the electromagnet device 18 operates, and the opening / closing mechanism 15 and the movable contact 161 are in the positions shown in FIG. Therefore, the tip 41a fitted on the circuit breaker 1 side of the trip cam 41 moves between ON and ⇔ trips as is apparent from the difference in position between (a) and (b). 4B, that is, the OFF state in which the handle 11 is rotated counterclockwise on the paper surface from the ON state is the same as FIG. 4A, but the moving speed of the tip 41a described above is the same. Differences will appear.

As a result of this movement, the tip 41b fitted on the external attachment 2 side also has a latch 251 that constitutes the opening / closing mechanism 25 of the external attachment 2 as shown in FIGS. 5 (a) and 5 (b). And move similarly between the arms 252. As a result, the movable contact 261 that constitutes the switch 26 built in the external attachment 2 rotates, that is, switches from conduction with the stator 262 to conduction with the stator 263 until then. The load pattern of the external terminal 24 connected to the stators 262 and 263, for example, the lamp lighting pattern is changed. In this embodiment, three external terminals 24 constitute so-called 1c contacts, but are provided with three external terminals 24. However, the number of external terminals 24 is not limited to three, and is 2a which is 1a contact or 1b contact. It may be individual. The switch 27 is interlocked with the opening and closing state of the circuit breaker 1, so-called an auxiliary contact (AX (a u x iliary switch Abbreviation) to be referred), irrespective of the OFF operation or tripping , Switching according to the contact and separation of the movable contact 161. As described above, it is not known from the position of the handle 11 of the circuit breaker 1 whether the circuit breaker 1 has been turned OFF or an overcurrent has occurred in the electric circuit. Moreover, by mounting AL and AX together, the state of the circuit breaker 1 and thus the state of the electric circuit can be grasped more accurately. However, since this AX is not directly related to the present invention, a detailed description thereof will be omitted even with the above-described difference in the moving speed of the tip 41a.

  On the other hand, in FIG. 6B, when a leakage current is generated, an unbalance of the current flowing through the conductor 36 due to the leakage current is detected by the zero-phase current transformer 37, and this signal is sent to the electronic circuit unit 38. The electronic circuit unit 38 amplifies this signal, compares its height and width with a reference level, and if it is determined to be a level for detecting electric leakage, the trip coil 39 is excited. By this excitation, the plunger 39a of the tripping coil 39 is attracted rightward on the paper surface, and the opening / closing mechanism 35 is in the closed state shown in FIG. 6B (although the leakage detection unit 3 itself has no contact). For the sake of convenience, the circuit breaker 1 and the external attachment 2 are referred to as a closed state or an open state) to shift to the open state of (a). Then, the tip 42b of the trip cam 42 fitted in the opening / closing mechanism 35 follows this transition.

  Since the trip cam 42 has a tip 42a fitted on the external attachment 2 side, the external attachment 2 is also tripped by the overcurrent described above with the movement of the trip cam 42 described above. In the same manner as the above, the closed state (FIG. 5B) is changed to the open state (FIG. 5A), and the switch 26 (and 27) is switched. At the same time, the trip operation of the opening / closing mechanism 25 of the external attachment 2 is transmitted to the circuit breaker 1 side via the trip cam 41, so that the circuit breaker 1 trips, that is, the earth leakage is interrupted.

  Thus, the trip operation of the circuit breaker 1 due to the occurrence of overcurrent operates the external attachment 2 via the trip cam 41, and the trip operation of the leakage detection unit 3 due to the occurrence of leakage causes the trip cam 42 to By operating the external appendage 2 via the circuit and further operating the circuit breaker 1 via the trip cam 41, it is possible to simultaneously cut off the electric circuit and output an alarm in both cases of overcurrent and electric leakage. In addition to connecting the opening / closing mechanism portions (15, 25, 35) with the trip cams 41, 42, the trip cams 41, 42 can be easily fitted without making them complicated. Thus, the configuration of each opening / closing mechanism is approximated. More specifically, the opening / closing mechanism 15 of the circuit breaker 1 and the opening / closing mechanism 35 of the leakage detection unit 3 are arranged at substantially equal intervals on the left and right, respectively, with the opening / closing mechanism 25 of the external attachment 2 as the center. The arrangement of each unit, in particular, the leakage detection unit 3 so as to be arranged leads to the effect described above. This makes it possible to obtain an alarm output even when using a small earth leakage breaker for home use, and it is necessary to monitor from a distance. For example, it is possible to reduce restrictions when selecting important circuits. It becomes.

Embodiment 2. FIG.
For example, when the circuit breaker described in the first embodiment is cut off due to electric leakage, each handle (11, 21, 31) is in the OFF position when going to the site where the circuit breaker is provided (see FIG. 1), the user can know that the circuit breaker has been operated due to electric leakage. On the other hand, the operation of the buzzer connected to the external attachment 2 alone, for example, cannot distinguish whether the electric circuit is interrupted due to overcurrent or electric leakage, but at least the electric circuit In the case where it is possible to specialize in alarm output for electric leakage interruption, it is possible by devising the aforementioned “transmission” method. This will be described as a second embodiment. FIG. 7 is a diagram schematically showing the engagement between the trip cam and the latch of each opening / closing mechanism for the sake of easy understanding of the second embodiment, and FIG. (B) shows this Embodiment 2, and (c) and (d) show Embodiment 3 described later.

  As shown in FIG. 7 (a), in order to obtain an alarm output in the first embodiment, that is, overcurrent or electric leakage, it is one of the members constituting the open / close mechanism 25 of the external attachment 2. The latch 251 requires the first receiving portion 251a, the second receiving portion 251b, and the transmission portion 251c. On the other hand, in the second embodiment, as shown in FIG. 7B, the first receiving portion 251a is removed. Thus, at the time of electric leakage, the movement of the trip cam 42 interlocked with the latch 351 of the electric leakage detection unit 3 is transmitted to the second receiving portion 251b and the latch 251 moves, and the movement of the latch 251 causes the transmission portion 251c to move. When the trip cam 41 is interlocked with each other, the latch 151 of the circuit breaker 1 is activated to interrupt the electric circuit. On the contrary, in the case of an overcurrent, the electric circuit is cut off by operating the latch 151, but the trip cam 41 is interlocked with the movement of the latch 151, and the latch 251 of the external attachment 2 remains stationary. It is.

That is, in the electric circuit interruption due to electric leakage, an alarm is output when the latch 251 is activated, but in the electric circuit interruption due to an overcurrent, the latch 251 is not activated and no alarm output is performed. As a result, the user can quickly determine that the response of, for example, the buzzer connected to the external appendage 2 is an electric leakage interruption, so that the inspection or the recovery work can be performed efficiently. The ground fault interrupter external auxiliary unit 2 which is interlocked in is called EAL (an abbreviation of e arth al arm switch) against AL described in the first embodiment, these AL, or EAL, the In view of the circumstances of the electric circuit, etc., the user may select as appropriate. In addition, when EAL is mounted, a pin for connecting the handle 11 of the circuit breaker 1 and the handle 21 of the external attachment 2 is unnecessary.

Embodiment 3 FIG.
Subsequently, FIGS. 7C and 7D will be described as a third embodiment. The feature of the third embodiment is that the electric circuit is not interrupted when a leakage occurs. First, in FIG.7 (c), the transmission part 251c is removed. Thus, at the time of electric leakage, the movement of the trip cam 42 interlocked with the latch 351 of the electric leakage detection unit 3 is transmitted to the second receiving portion 251b and the latch 251 moves. No transmission is made to the trip cam 41 due to the absence. That is, even if a leakage occurs, only an alarm is output from the external attachment 2 and the circuit is not interrupted. Since the first receiving portion 251a of the latch 251 is provided, the alarm output is performed even when the overcurrent is interrupted.

That is, FIG. 7C is equipped with a so-called AL that cannot specify whether the alarm output is caused by an overcurrent (cutoff) or a leakage (non-cutoff), as in the first embodiment. Circuit breaker. On the other hand, in FIG. 7D, the latch 251 is provided with each member described so far, that is, the first receiving portion 251a, the second receiving portion 251b, and the transmitting portion 251c, but the trip cam 41 is provided. It is not equipped. As a result, since the breaking operation of the circuit breaker 1 is not transmitted to the external attachment 2, a circuit breaker equipped with a so-called EAL that can immediately determine that the alarm output is caused only by a leakage (non-breaking). It becomes. In any case, as described above, in the case of electric leakage, only the alarm output is performed and the electric circuit is not interrupted, so that the circuit interrupter 101 in FIG. 7 (c) and FIG. 7 (d) has MCBs ( m It has been referred to as the abbreviation) of iniature circuit b reakers. For example, after confirming that a load, especially a mechanical device, etc. is in a safe position even if a leakage occurs, the MCBs turns off the handle 11 of the circuit breaker 1 and checks its electric circuit. This is effective when there is an inconvenience, such as when there is an inconvenience in the case of an immediate ground fault interruption.

As mentioned above, from Embodiment 1-3 demonstrated so far, the function of each member of the latch 251 of the external attachment 2 is as follows.
First receiving portion 251a: receiving overcurrent interruption of circuit breaker 1 Second receiving portion 251b: receiving leakage operation of leakage detection unit 2 Transmission portion 251c: movement of latch 251 due to leakage operation to circuit breaker 1 In addition, the following product groups can be constructed depending on the presence or absence of the above-described members or the trip cam 41.
RCBOs with AL: Corresponds to FIG. 7A (Embodiment 1)
RCBOs with EAL: Corresponds to FIG. 7B (Embodiment 2)
MCBs with AL: Corresponds to FIG. 7C (Embodiment 3)
MCBs with EAL: Corresponds to Figure 7 (d) (Same as above)
In other words, in addition to the compatibility of leakage detection and alarm output by arranging the opening / closing mechanism sections (15, 25, 35) described in the first embodiment at equal intervals, the opening / closing mechanism section 25 of the external attachment 2 is provided. Even if it is a small circuit breaker for home use, it can be used for power distribution boards and power distribution boards by devising components and preparing external attachments 2 according to the needs of users. A function equivalent to a circuit breaker having a relatively large outer shape can be provided.

Embodiment 4 FIG.
Although the assembly procedure of the circuit breaker 101 has already been described, in order to obtain the circuit breaker 101 that achieves both leakage detection and alarm output, the conventional circuit breaker, that is, the MCBs with AL shown in FIG. The RCBOs shown in Fig. 14 are simply docked while sharing the MCBs, that is, as shown in Fig. 8, either the circuit breaker 1 or the leakage detection unit 3 is slid and attached to the open space. It is preferable that the device 2 is mounted particularly in the sense of effectively utilizing each existing unit on the user side. In this docking, it is particularly necessary to consider the connection between the external terminal 14b of the circuit breaker 1 and the conductor 36 of the leakage detection unit 3, which will be described as a fourth embodiment. 9 is a bottom view of the circuit breaker 1 according to Embodiment 4 of the present invention, and FIG. 10 is an external perspective view of the external terminal (14b). 11 and 12 are a bottom view and an external perspective view of a leakage detecting unit showing a modification of the fourth embodiment of the present invention.

  As shown in FIG. 10, the wire receiving portion 14b2a located at the lower part on the paper surface of the solderless terminal 14b2 constituting the external terminal 14b has a flat shape. Therefore, as shown in FIG. It is possible to move in the left-right direction on the paper and tighten with the terminal screw 14b1. That is, on the paper surface of FIG. 9, the conductor 36 is at the position of a solid line when RCBOs, while the circuit breaker 101 according to the present invention, that is, when the external attachment 2 is inserted, What is necessary is just to slide the leakage detection unit 3 suitably so that it may each be arranged. Accordingly, it is possible to cope with a sudden specification change from RCBOs to RCBOs with EAL, for example.

  Needless to say, when the rated current of the circuit breaker 101 increases, the wire diameter of the conductor 36 also increases. However, it is expected that the leakage detection unit 3 is difficult to slide above a certain rated current due to the relationship between the wire diameter of the conductor 36 and the opening size of the solderless terminal 14b2. In such a case, as shown in FIG. 11, if the flexible portion 36b is provided in a part of the conductor 36, the leakage detection unit 3 can be slid again. Therefore, it is possible to provide the circuit breaker 101 that is not affected by the size of the circuit breaker 101. In this case, the terminal cover portion 32c extending from the base 32 of the leakage detection unit 3 is selectively used depending on the presence or absence of the external attachment 2 as shown in FIG. ), Or a slide type that can be expanded and contracted ((b), 32c ″).

It is a front view of the circuit breaker in Embodiment 1 of this invention. In FIG. 1, it is the external appearance perspective view decomposed | disassembled for every unit. In FIG. 1, it is a front view of only a leak detection unit. In FIG. 1, it is an internal structure figure of the circuit breaker seen from A direction, (a) shows a trip state, (b) shows an ON state, respectively. In FIG. 1, it is an internal structure figure of the external attachment seen from A direction, (a) shows a trip state, (b) shows an ON state, respectively. In FIG. 1, it is an internal structure figure of the earth-leakage detection unit seen from the B direction, (a) shows a trip state, (b) shows an ON state, respectively. It is the figure which modeled the transmission method of the circuit breaker in Embodiment 1-3 of this invention, (a) is Embodiment 1, (b) is Embodiment 2, (c) and (d ) Shows the third embodiment. It is an assembly drawing of the circuit breaker in Embodiment 4 of this invention. In FIG. 8, it is a bottom view of only a circuit breaker. In FIG. 9, it is an external appearance perspective view of only an external terminal. It is a bottom view of the earth-leakage detection unit in the modification of Embodiment 4 of this invention. It is an external appearance perspective view in FIG. 11, and (a) is a replaceable type and (b) is a slide type, respectively. It is an external appearance perspective view which shows conventional MCBs with AL. It is an external appearance perspective view which shows the conventional RCBOs.

Explanation of symbols

1 Circuit breaker 2 External attachment 3 Earth leakage detection unit 11 Handle
12 base, 12a connecting hole, 13 cover, 14a, 14b external terminal,
15 Opening / closing mechanism, 151 Latch, 161 Movable contact, 162 Stator,
17 Bimetal, 18 Electromagnet device, 21 Handle, 22 Base,
22a connecting hole, 23 cover, 24 external terminal, 25 opening / closing mechanism,
251 latch, 251a first receiving part, 251b second receiving part,
251c Transmitter, 261 movable contact, 262/263 stator, 31 handle,
32 base, 32a connecting hole, 33 cover, 34 external terminal, 35 opening / closing mechanism,
351 latch, 36 conductor, 36b flexible part, 37 zero-phase current transformer,
38 electronic circuit section, 39 trip coil, 41/42 trip cam,
101 Circuit breaker.

Claims (6)

An insulating casing made of a cover and a base, a handle having a handle portion that can be opened and closed from the outside, and a stator that is mounted inside the insulating casing and has a fixed contact, and is opposed to the stator. A movable contact; an opening / closing mechanism that drives the movable contact; an electromagnet device that operates the opening / closing mechanism in response to an overcurrent; and the stator and the movable contact disposed outside the insulating housing. A circuit breaker with an external terminal connected to the child;
An insulating housing comprising a cover and a base, a handle having a handle that can be opened and closed from the outside, and a stator having a fixed contact mounted inside the insulating housing; A movable contact that contacts and separates from the stator, an open / close mechanism that drives the movable contact, and an external unit that is disposed outside the insulating casing and connected to the stator and the movable contact The circuit breaker insulation housing and the external attachment housing are respectively connected to the circuit breaker switching mechanism portion and the external attachment device. In the circuit breaker in which the connecting hole for arranging the first connecting member for connecting the opening / closing mechanism of the shaped appendage is formed,
Insulating housing composed of a cover and a base, a handle having a handle that can be operated from the outside, a zero-phase current transformer for detecting a leakage current of the main circuit, and amplifying a signal detected by the zero-phase current transformer An electronic circuit unit, a tripping coil that operates according to the output of the electronic circuit unit, an opening / closing mechanism unit that is operated by the tripping coil, and the zero phase current transformer that is disposed outside the insulating casing A leakage detection unit composed of external terminals located at both ends of the conductor to be connected, and the insulation case of the leakage detection unit and the insulation case of the external attachment are respectively provided with the leakage detection unit. A circuit breaker having a connection hole for arranging a second connecting member for connecting the opening / closing mechanism to the opening / closing mechanism of the external attachment. The latch that constitutes the opening / closing mechanism of the external attachment has a first receiving portion that engages with the first connecting member that is interlocked with the operation of the opening / closing mechanism when operated by the electromagnet device of the circuit breaker. The circuit breaker according to claim 1, wherein the circuit breaker is provided. The latch that constitutes the opening / closing mechanism of the external attachment includes a second receiving portion that engages with a second connecting member that interlocks with the operation of the opening / closing mechanism of the leakage detection unit, and the movement of this latch. The circuit breaker according to claim 1, further comprising an earth leakage trip mechanism including a transmission unit that transmits to one connecting member. The circuit breaker according to claim 3, wherein the first connecting member is not provided. When one end of the conductor that passes through the zero-phase current transformer of the leakage detection unit is connected to the external terminal of the circuit breaker, an external attachment is sandwiched at least between the circuit breaker and the leakage detection unit. 5. The circuit breaker according to claim 2, wherein the external terminal is formed wide with respect to one end of the conductor so that the circuit breaker can be moved. When one end of the conductor that passes through the zero-phase current transformer of the leakage detection unit is connected to the external terminal of the circuit breaker, an external attachment is sandwiched at least between the circuit breaker and the leakage detection unit. 5. The circuit breaker according to claim 2, wherein the conductor is provided with a flexible portion so that the leakage detection unit can be moved.

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