JP4144588B2 - Remote control type earth leakage breaker - Google Patents

Description

  The present invention relates to a remote control type earth leakage breaker that can be turned on and off by remote operation.

  In the first conventional example (for example, see Patent Document 1), a main movable contact driven by a handle and a relay movable contact driven by an electromagnet device are arranged to face each other.

  According to this structure, since the main movable contact and the relay movable contact are in direct contact with each other, even if the main movable contact and the relay movable contact are consumed by the first short-circuit current, In order to prevent welding between the movable contact and the relay movable contact, a certain level of contact pressure is required. Also, in the first conventional example, one relay movable contact is driven by one electromagnet device, so there is no need to enlarge the electromagnet device, but two electromagnet devices are required when driving two pole relay movable contacts simultaneously. In addition, there is a problem that a large electromagnet device must be used, resulting in a large body.

  On the other hand, in the second conventional example (see, for example, Patent Document 2), when adding a leakage interrupt function to the remote control circuit breaker, the agreement type 1P type remote control circuit breaker as in the first conventional example described above. The agreement type 2P type remote control type earth leakage circuit breaker is combined with the agreement type 1P type body with the zero phase current transformer and the earth leakage detection device arranged side by side. In this case, there is a problem that although there are two poles, only one pole of the remote control type circuit breaker can be opened and closed by the electromagnet device, and the other poles cannot be opened and closed by the electromagnet device.

In general, the other pole is on the ground side, but if it is connected to the power supply side by mistake, electricity will flow if touched by hand even though the relay contact is turned off. Moreover, since it is a contract type 2P type, there exists a problem that a container will enlarge.
JP-A-5-290711 JP 7-240142 A

  The present invention has been made in view of such a reason, and the object is to open and close the relay contact device of each pole with one electromagnet device, and the width per one pole. The size can be reduced, and even if the permanent magnet of the electromagnet device and the leakage detection substrate are brought closer due to the miniaturization, the magnetic flux of the permanent magnet hardly affects the leakage detection substrate, and the leakage detection substrate malfunctions. The object of the present invention is to provide a remote control type earth leakage breaker that is difficult to perform.

The remote control type earth leakage breaker of the present invention includes a main body, a plurality of input / output terminals disposed at both ends of the main body, and a main circuit interposed for each pole in an electric circuit between these input / output terminals. A main contact device having a movable contact and a main fixed contact; and a handle having a handle disposed on the upper surface of the vessel body, wherein the main movable contact is brought into contact with and separated from the main fixed contact by opening and closing the handle. And an open / close mechanism having a tripping portion for forcibly opening the main movable contact from the main fixed contact, and a relay movable contact and a relay fixed contact interposed in series with the main contact device in the electric path between the input / output terminals. An electromagnetic device having a movable iron core that contacts and separates the relay movable contact with the relay fixed contact by an external signal, and a zero-phase current transformer that detects an unbalanced current flowing in the electric circuit of each pole When, The zero-phase current transformer includes a leakage detection substrate on which a switching element that is turned on when the unbalanced current is detected, and a tripping coil that is energized when the switching element is turned on. In a remote control type earth leakage circuit breaker provided with an electromagnet for operating the removal portion and forcibly opening the main movable contact from the main fixed contact,
The electromagnet device is disposed on the outer side of the coil in parallel with a coil frame in which a coil is wound, the movable iron core that is reciprocated in an inner hole of the coil frame, and a moving direction of the movable iron core. A U-shape comprising a first yoke, an intermediate piece and both end pieces connected from both ends thereof is formed, the intermediate piece is opposite to the coil of the first yoke, and the both end pieces are the first yoke. A second yoke disposed so as to sandwich both ends thereof, and a permanent magnet interposed between the first yoke and the intermediate piece of the second yoke,
The leakage detection substrate is arranged at a position where one of the intermediate piece or both end pieces of the second yoke is interposed between the leakage detection substrate and the permanent magnet. is there.

  In the above configuration, a gap is formed between the permanent magnet and the both end pieces of the second yoke, and the leakage detection substrate is disposed between the leakage detection substrate and the permanent magnet. It is arrange | positioned in the position where one of both end pieces intervenes.

  According to the remote control type earth leakage circuit breaker of the present invention, the main contact device and the relay contact device are separated, so that the relay contact device of each pole is driven to open and close by one electromagnet device and the width per one pole. Since the dimensions can be reduced, the electromagnet device can be reduced in size, and the overall size can be reduced. In addition, since the leakage detection board is a weak electric circuit, it may malfunction even under the influence of a small amount of magnetic flux, but even if the permanent magnet of the electromagnet device becomes closer to the leakage detection board due to the overall size reduction, Since the two yokes are interposed, the magnetic flux of the permanent magnet hardly affects the leakage detection substrate, and the leakage detection substrate is less likely to malfunction.

  In addition, since the leakage detection substrate is disposed on one side of both end pieces of the second yoke that can be separated from the permanent magnet, the magnetic flux of the permanent magnet is less likely to affect the leakage detection substrate. The board is less likely to malfunction.

  A bipolar remote control type earth leakage breaker according to an embodiment of the present invention will be described with reference to FIGS. The body 1 includes a case 2 whose side is open, a side cover 3 that closes the opening, an output-side partition member 5, and an input-side partition member 4, and has a width equal to or less than the agreement type 1 pole. Have The input side partition member 4 and the output side partition member 5 are interposed between the case 2 and the side cover 3 at both ends of the container body 1 and connect the width direction of the container body 1, that is, both side surfaces of the container body 1. Partition the middle of the direction.

  For each pole, the electric circuit in the body 1 is a plug-in terminal 6 that is an input side terminal, a flexible electric wire conductor 11, an abnormal current detecting device 7, a flexible electric wire conductor 12, a main contact device 8, a relay contact device 9, It is composed of a flexible wire conductor 13 and a quick connection terminal 10 which is an output side terminal. Each electric circuit extends in a direction connecting both ends of the container 1, and is disposed in a space partitioned by the partition members 4 and 5 so as to be arranged in parallel in the width direction of the container 1. The zero-phase current transformer 100 is connected so that the main contact device 8 is connected to the plug-in terminal 6 side of the relay contact device 9 and the electric path between the main contact device 8 and the plug-in terminal 6 is the primary side. Is provided. Furthermore, both ends of the leakage detecting device 102 and both ends of the unbalanced current generating circuit 115 are connected between the electric paths between the main contact device 8 and the relay contact device 9.

  The plug-in terminal 6 is disposed at one end of the container body 1 in both end directions, and contacts a bar (not shown) connected to a main breaker (not shown). In order to fit, the groove 80 is formed in the end part of the container 1 and the input side partition member 4, and the plug-in terminal 6 is disposed in the groove 80. The quick connection terminal 10 uses a lock spring 82 that quickly connects an electric wire conductor (not shown), and is disposed inside an electric wire conductor insertion hole 83 formed in the end surface of the case 2. It can be unlocked. The unlocking member 84 has a hole 84b in the middle portion, the shaft 98 passes through the hole 84b, and both ends of the shaft 98 are supported by the case 2 and the side cover 3 through the output-side partition member 5, and thereby unlocked. A member 84 is pivotally supported. A part of the lower end portion of the unlocking member 84 rests on the locking spring 82, and an engagement piece 86 is provided to engage with the tip of the wire conductor that has passed through the locking spring 82 from the wire conductor insertion hole 83. The upper end portion of the unlocking member 84 is exposed from a part of the exhaust hole 64a formed from the upper surface to the end surface of the case 2, and the display portion 84a is provided in the exposed portion of the upper end portion. The display portion 84a is positioned at the central edge of the upper surface of the body 1 of the exhaust hole 64a when not pressed by the wire conductor, and pushes the engagement piece 86 at the tip of the wire conductor to rotate counterclockwise. By moving, the display portion 84a of the unlocking member 84 slightly moves in the exhaust hole 64a of the case 2 to expose the display surface (shaded portion) of the display portion 84a. As a result, it is displayed that the wire conductor is securely inserted.

  A remote control terminal 90 serving as a connection position of the remote control signal line of the electromagnet device 31 is provided below the quick connection terminal 10 on one end surface of the container 1, and an end portion is mounted on a printed circuit board 49 described later.

  The opening / closing mechanism 30 and the electromagnet device 31 are shared by the poles, and are disposed between the central portion in the direction connecting both ends of the container body 1, that is, between the partition members 4 and 5. The opening / closing mechanism 30 and the main contact device 8 are disposed above the insulating partition wall 32 provided in the case 2, and the electromagnet device 31 is disposed in an electromagnet device housing chamber 136 formed below the insulating partition wall 32. In FIG. 18, reference numeral 135 denotes a magnetic shielding plate provided in the insulating partition wall 32 and interposed between the electromagnet device 31, the switching mechanism 30, and the main contact device 8.

  The opening / closing mechanism 30 mainly includes a handle 14, a reverse link 15, a lever 16, a movable frame 17, an opening spring 19, and a tripping member 20. The handle 14 has a shaft 14 a rotatably supported between the case 2 and the side cover 3 of the container 1, and a part of the handle 14 protrudes from an opening 18 formed on the upper surface of the case 2. One end of the reverse link 15 is connected to the handle 14, and the other end is connected to an intermediate portion that is a fulcrum of the lever 16. One end of the lever 16 is locked to the tripping member 20, and the other end is locked to the movable frame 17. The movable frame 17 has a shaft 17 a that is pivotally supported between the case 2 and the side cover 3. The opening spring 19 is compressed and interposed between the movable frame 17 and a spring receiver 21 provided in the case 2, and urges the movable frame 17 clockwise in FIG. The tripping member 20 is urged by a return spring 23 in a direction (clockwise in FIG. 4) in which the shaft 20a is pivotally supported between the case 2 and the side cover 3 and the locking portion 22 is locked to one end of the lever 16. Yes. The main movable contact 8 a of the main contact device 8 has a base end inserted through the recess 17 b of the movable frame 17 and is held in the recess 17 b by a contact pressure applying spring 34. And the flexible wire conductor 12 and the base end part of the main movable contact 8a of the main contact device 8 are connected. Here, the tripping portion that causes the trip operation is configured by the lever 16, the movable frame 17, the tripping member 20, the opening spring 19 and the like.

  The on / off state of the opening / closing mechanism 30 is the state shown in FIGS. 1 and 4, and the movable frame 17 is rotated by the handle 14 with one end of the lever 16 locked to the locking portion 22 as shown in FIG. 4. Thus, the opening spring 19 is compressed, and the handle 14 is locked to the edge of the opening 18 by the biasing force. The off state is a state in which the handle 14 in the on state in FIG. 1 is operated to the opposite side as shown in FIG. 10, and the reversing link 15 is reversed as the handle 14 rotates and is movable by the biasing force of the opening spring 19. The frame 17 rotates clockwise and the movable contact 8a is turned off, and the lever 16 is pushed up. The on operation from the off state is the opposite operation. In the trip state, the tripping member 20 is rotated clockwise against the return spring 23 by the operation of the electromagnet 103 of the abnormal current detection device 7 or the leakage detection device 102 described later in the on state of FIG. The lever 16 is pulled out so that 22 is detached from the lever 16. Therefore, the movable frame 17 is rotated clockwise by the biasing force of the opening spring 19 to push up the lever 16, and the movable contact 8a is turned off, and the handle 14 biases the handle 14 in the off direction. Rotates to a neutral position between the on position. In addition, when the handle 14 is operated in the off direction from the neutral posture state, it can be turned off.

  The electromagnet device 31 uses a latch-type polarized electromagnet, and is arranged horizontally in the body 1 so that the operation direction of the plunger 36 serving as a movable iron core is a direction connecting both ends of the body 1. The width direction connecting both sides of 1 occupies the entire space between the inner side surface of the case 2 and the inner side of the side cover 3. The configuration of the electromagnet device 31 is shown in FIG. A plunger 36 is inserted into an inner hole of the coil frame 37 so as to be able to advance and retreat, and a coil 38 is wound around the outer periphery of the coil frame 37. A pair of inner yokes 39 serving as fixed iron cores are arranged on both upper and lower sides of the coil 38 in parallel with the advancing / retreating direction of the plunger 36. A pair of outer yokes 40, which are substantially U-shaped fixed iron cores composed of an intermediate piece 40a and both end pieces 40b connected from both ends thereof, are disposed on the outer sides of the inner yoke 39 so that both ends of the inner yoke 39 are sandwiched between the both end pieces 40b. A permanent magnet 41 is provided between the intermediate piece 40a of the outer yoke 40 and the inner yoke 39, and a gap is formed between the permanent magnet 41 and both end pieces 40b. Further, at both ends of the plunger 36, an armature plate 42 is provided between both ends of the outer yoke 40 and the inner yoke 39. A relay movable frame 44 of the relay contact device 9 is connected to one end of the plunger 36 by a shaft 36a. A shaft 44 a of the relay movable frame 44 is pivotally supported between the case 2 and the side cover 3. The relay movable frame 44 has recesses 44b on both sides, and the relay movable contact 9a is inserted into the recess 44b, and the relay movable contact 9a is held by a contact pressure applying spring 45. The relay movable contact 9 a and the quick connection terminal 10 are connected by a flexible wire conductor 13. A printed circuit board 49 having a switch 47 using a microswitch or the like opposed to the plunger 36 via a relay movable frame 44 is disposed at one end of the plunger 36, and a switch 48 using a microswitch or the like is opposed to the other end. A printed circuit board 50 is provided. The relay movable frame 44 is rotated at one end of the plunger 36, the switch 47 is pressed by the switch pressing portion 44 c of the relay movable frame 44, and the switch 48 is directly pressed by the other end of the plunger 36. Both switches 47 and 48 are configured so that the current is stopped by pressing the switches 47 and 48 at the end of the plunger 36. A pair of diodes and a surge absorbing element, which will be described later, are mounted on the printed circuit boards 49 and 50 to rectify alternating current and energize the coil 38, and at least the plunger 36 of the electromagnet device 31 is interposed between the printed circuit boards 49 and 50 and the coil 38. Wiring is performed by a pattern forming substrate 52a and lead wires 52 that cover side surfaces to both ends in the moving direction. Thereby, the plunger 36 can be driven by a one-shot signal from the external signal line.

  FIG. 20A shows an ON state of the plunger 36 in which the relay movable contact 9a is turned ON, and one end of the plunger 36 is latched in a state of protruding outward by a permanent magnet 41. The OFF state of the relay movable contact 9a is a state in which the plunger 36 has moved to the opposite side as shown in FIG. 4B, and the plunger 36 is moved to the opposite side by energizing the coil 38 in one direction. And it is latched by the permanent magnet 41. When the coil 38 is energized in the direction opposite to the above, it turns from the off state to the on state.

  FIG. 21 is an operation circuit diagram of the electromagnet device 31 having the coil 38. The pair of antiparallel diodes D1 and D2 are for rectification, and switches 47 and 48 are connected to one end thereof as shown in the figure, and the remote switch SW is connected to the other end. Z is a surge absorbing element. The figure shows the ON operation of the plunger 36 from the OFF state. That is, when the remote switch SW is operated so that the diode D1 side is turned on and the diode D2 side is turned off, the normally closed contact NC of the switch 47 is closed, so that half-wave rectification flows through the coil 38 as indicated by an arrow. As a result, the plunger 36 is driven to leave the state where the switch 48 is pressed, then the switches 47 and 48 are both released, and then the switch 47 is pressed. When the switch 48 is released from the pressed state, the contact is switched from the normally open contact NO to the normally closed contact NC. When the switch 47 is pressed, the normally closed contact NC is opened and the normally open contact NO is closed, whereby the energization of the coil 38 is stopped. When the plunger 36 is turned off from the ON state, when the remote switch SW is operated in the opposite direction so that the diode D2 side is ON and the diode D1 side is OFF, the switch 47 is normally closed contact NO and the switch 48 is normally closed contact. Since the NC is closed, half-wave rectification flows through the coil 38 in the opposite direction as indicated by the arrow. At this time, a current of 1/2 flows through each of the switches 47 and 48. As a result, the plunger 36 is driven to the off side, contrary to the above-described operation, so that the switch 47 is released from the pressed state, then both the switches 47 and 48 are released, and then the switch 48 is pressed. . When the switch 47 is released from the pressed state, the contact is switched from the normally open contact NO to the normally closed contact NC. When the switch 48 is pressed, the normally closed contact NC is opened and the normally open contact NO is closed, whereby the energization of the coil 38 is stopped.

  Here, a display lever 54 extends toward the upper end of the case 2 in the relay movable frame 44. A display opening 55 is formed at the upper end of the case 2 adjacent to the opening 18 for the handle, and a shaft portion 56a of a relay contact display member 56 for displaying the relay status is formed inside the case 2 and the output side partition. It is pivotally supported between the members 5. The relay contact display member 56 is formed with an engagement portion 56b, and the upper end portion of the display lever 54 is engaged with the engagement portion 56b. As the relay movable frame 44 is turned on or off by the operation of the plunger 36, the relay contact display member 56 is turned, and an ON or OFF display shown on the relay contact display member 56 appears in the opening 55.

  The main contact device 8 has a main movable contact 8a having a main movable contact 60 fixed to the distal end side, a main fixed contact 61 fixed to the distal end side, and a base end facing the base end side of the main movable contact 8a. And a main fixed contact 8b extended in a shape. The relay contact device 9 includes a relay fixed contact 9b in which a relay fixed contact 62 is fixed on the front end side, a relay movable contact 63 fixed on the front end side, and a base end side as a base end side of the relay fixed contact 9b. For example, it has the relay movable contact 9a extended in the opposite direction.

  The case 2 and the partition of the main body 1 are arranged so that the set of the main movable contact 60 and the main fixed contact 61 and the set of the relay movable contact 63 and the relay fixed contact 62 are divided and arranged in the direction connecting both side portions of the main body 1. Each member 5 is housed in an arc extinguishing chamber 64 for each pole formed in the member 5. An exhaust hole 64a of the arc extinguishing chamber 64 of each pole is formed in a corner portion between the upper surface of the container 1 and the end surface on the output side.

  The main contact device 8 and the relay contact device 9 of each pole are electrically connected by an arc driver 66 which is a conductor formed of a plate (see FIG. 16). The arc driver 66 passes from the base end side of the main fixed contact 8b to the side opposite to the main fixed contact 8b through the side of the main movable contact 8a so as to cross the base end of the main movable contact 8a. The connecting piece 67 extends, and the arc driving piece 68 extends from the connecting piece 67 to the main movable contact 8a so as to face the front end of the main movable contact 8a. Further, the proximal end portion of the relay fixed contact 9 b is connected to the distal end portion of the arc driving piece 68. As a result, the main fixed contact 61 and the relay fixed contact 62 are connected via the arc driver 66. The main fixed contact 8b, the connecting piece 67, the arc drive piece 68 and the relay fixed contact 9b are press-molded and bent by a single conductive plate, and the main fixed contact 61 and the relay fixed contact 62 are fixed to the conductor. is doing. In this case, the surface of the relay fixed contact 62 of the relay fixed contact 9b is fixed so as to be opposite to the fixed contact 61 side of the main contact device 8, and the main end of the relay fixed contact 9b on the base end side is fixed. An iron member 70 is attached to the contact device 8 side. Further, the relay fixed contact 9b around the main fixed contact 61, the iron member 70, the arc driving piece 68, the connecting piece 67 and the surface of the main fixed contact 8b facing the main fixed contact 61 are covered with respect to the main fixed contact 61. An insulator 95 that is formed as described above and forms the inner wall of the arc extinguishing chamber 64 is disposed in the arc driver 66. Further, the relay movable contact 9a is formed with an extension piece 69 extending from the position where the relay movable contact 63 is fixed to the front end side, and the iron member 70 has both side pieces bent from both sides to the extension piece 69 side. 70a is formed, and, for example, an iron magnetic body 71 facing both side pieces 70a is attached to the extending piece 69.

  Here, the operation states of the main contact device 8 and the relay contact device 9 will be described. 2, 10, and 12 are states in which the relay movable contact 63 is turned on, off, or tripped by operating the handle 14 while the relay movable contact 63 is on. 5 and 8 show the relay contact device 9 in the off state and the main contact device 8 in the on or off state.

  In each pole of the vessel 1, the abnormal current detecting device 7 includes a short-circuit detecting means 75 having a movable-side magnetic body 75 a that performs an electromagnetic attraction operation with respect to the fixed-side magnetic body 75 b by a magnetic flux generated around the short-circuit current; The overcurrent detection means 76 using In one pole, an intermediate portion of the operation lever 77 is pivotally supported by a shaft 78 provided on the input side partition member 4, and the operation lever 77 is operated clockwise by being pushed by the movable side magnetic body 75a or the bimetal 7b. An operating lever 77 is connected to the tripping member 20 via a link 79. When the operating lever 77 is operated by short circuit detection or overcurrent detection, the tripping member 20 is rotated clockwise against the return spring 23. The lever 16 is pulled and operated. In the other pole, the tripping member 20 is provided with two operation lever portions 77a pressed by the movable side magnetic body 75a and the bimetal 7b of the abnormal current detection device 7.

  The zero-phase current transformer 100 is mounted on a mounting substrate 101 that is a leakage detection substrate on which a leakage detection circuit 105 is mounted, and is connected between the plug-in terminal 6 in the partition member 4 of the container 1 and the abnormal current detection device 7. Arranged in the space. And the flexible wire 11 which comprises the electric circuit which connects the plug-in terminal 6 and the abnormal current detection apparatus 7 is made into the primary side, and the zero-phase current transformer 100 and the through-hole 101a of the board | substrate 101 are penetrated. Here, in the mounting substrate 101, one of both end pieces 40 b of the outer yoke 40 is interposed between the front and back surfaces and the permanent magnet 41. The electromagnet device 31, the main contact device 8, the relay contact device 9, and the zero-phase current transformer 100 are arranged separately in the direction connecting both ends of the body 1, that is, the extending direction of the electric circuit and the vertical direction. That is, the zero-phase current transformer 100 is disposed on the plug-in terminal 6 side, the relay contact device 9 is disposed on the fast connection terminal 10 side, the main contact device 8 is disposed on the upper surface side of the body 1, and the electromagnet device 31. Is arranged on the lower surface side of the container 1. The power supply line 122 a connected between the mounting substrate 101 and the main contact device 8 is routed in the electromagnet device storage chamber 136 together with a signal line that is connected to the remote control terminal 90 and drives the electromagnet device 31.

  The leakage detection device 102 includes a leakage detection circuit 105 and a switching element 104 mounted on the mounting substrate 101, and an electromagnet 103 having a tripping coil 106 (see FIG. 17). 103 is arranged on the opposite side of the longitudinal direction. The leakage detection circuit 105 receives the secondary side of the zero-phase current transformer 100 as an input, and drives the switching element 104 when a predetermined output reaches a predetermined time. The electromagnet 103 is accommodated in the output-side partition member 5 between the output-side partition member 5 and the side cover 3 so as to be juxtaposed in the width direction of the relay contact display member 56 and the body 1. A tripping coil 106 constituting a coil is connected to an electric circuit between the main contact device 8 and the relay contact device 9, that is, an arc driver 66 of each pole, via a switching element 104. The bridge member 108 that reaches the output side partition member 5 extends from the input side partition member 4, and the handle 14 is disposed between the bridge member 108 and the case 2. A slide member 110 is slidably supported in a guide groove 109 formed on the opposite side surface. One end of the slide member 110 is opposed to the tip of the plunger of the electromagnet 103 and a spring 111 is interposed between the other end and the bridging member 108. And press one end against the plunger. The drive unit 112 extending from the other end of the slide member 110 faces the receiving protrusion 113 of the tripping member 20. The bridging member 108 has a hole 108a through which the shaft 14a of the handle 14 is passed, and a storage groove 108b is formed in parallel with the guide groove 109, and a connecting line 122 between the electromagnet 103 side and the leakage detection device 102 of the printed circuit board 101 is connected. Pass through. Here, the storage groove 108b extends in the direction connecting the input / output terminals on the upper surface side of the main contact device 8 and the opening / closing mechanism 30 of the container 1.

  When an unbalanced current is detected by the zero-phase current transformer 100, the switching element 104 of the leakage detection device 102 is turned on, the trip coil 106 is energized, and the slide member 110 is resisted against the spring 111 by the plunger of the electromagnet 103. , And the tripping member 20 is driven by the driving unit 112 to trip the lever 16 and the opening / closing mechanism 30 is tripped.

  The unbalanced current generation circuit 115 has a test switch 116, a resistor 117, and a linkage portion 115a of the zero-phase current transformer 100, and both ends thereof are connected to the arc driver 66 of each pole as shown in FIGS. ing. The test switch 116 is disposed above the electromagnet 103 of the output-side partition member 5, and a test button 118 for operating the test switch 116 is mounted in a hole 125 formed over the output-side partition member 5 and the upper surface of the side cover 3. is doing. In addition, the earth leakage display member 120 is disposed in a hole 126 formed over the upper surface of the output side partition member 5 and the side cover 3 along the test button 118 and the extending direction of the electric circuit, that is, in the longitudinal direction of the container 1. At least one of the earth leakage display member 120 and the test button 118 is arranged in the width direction of the relay contact display member 56 and the container 1. When the test button 118 is pressed, the test switch 116 is turned on, and an output appears on the secondary side of the zero-phase current transformer 100 due to the generation of a pseudo unbalanced current, which is detected by the leakage detection circuit 105 of the leakage detection device 102, The switching element 104 is turned on, whereby the trip coil 106 is energized, the electromagnet 103 is operated, and the opening / closing mechanism 30 is tripped.

  The earth leakage display member 120 is configured to protrude from the upper surface of the container 1 by a spring (not shown) in conjunction with the operation of the electromagnet, for example, and after the earth leakage trip operation, the handle 14 is turned off to cause the earth leakage. The display member 120 is configured to be retracted.

  In the present invention, the intermediate piece 40 a of the outer yoke 40 may be interposed between the mounting substrate 101 and the permanent magnet 41.

It is the front view of the ON state which looked at the inside of the remote control type earth leakage breaker of one embodiment of the present invention. FIG. It is a top view of an ON state. It is a rear view of the ON state which looked at the inside. It is a front view of a relay contact device in an OFF state. FIG. It is a rear view of a relay contact device in an OFF state. It is a front view of a main contact device and a relay contact device in an OFF state. FIG. It is a front view of a main contact device in an OFF state. FIG. It is a front view of a trip state. FIG. It is a front view which mainly shows a leak detection apparatus, a test switch, and a zero phase current transformer. It is a perspective view which shows an abnormal current detection apparatus, an electromagnet, and a test switch. It is a disassembled perspective view of an arc drive conductor. It is a wiring diagram around a zero phase current transformer. It is a fragmentary sectional view showing an electromagnet device. It is an external perspective view. It is sectional drawing of an electromagnet apparatus. It is an operation circuit diagram of an electromagnet device.

Explanation of symbols

1 Body 6 Plug-in terminal 8 Main contact device 9 Relay contact device 9a Relay movable contact 9b Relay fixed contact
10 Fast connection terminal
14 Handle 30 Opening / closing mechanism 31 Electromagnet device 36 Plunger 37 Coil frame 38 Coil 39 Inner yoke 40 Outer yoke 40a Intermediate piece 40b Both end pieces 41 Permanent magnet 47 Switch 48 Switch 60 Main movable contact
61 Main fixed contact
62 Relay fixed contact 63 Relay movable contact 66 Arc driver 100 Zero phase current transformer 101 Mounting board 102 Electric leakage detection device 103 Electromagnet 104 Switching element 106 Trip coil

Claims (2)

A main contact having a main body, a plurality of input / output terminals arranged at both ends of the main body, and a main movable contact and a main fixed contact interposed in each pole in an electric path between these input / output terminals An apparatus and a handle disposed on the upper surface of the container body, and having a configuration in which the main movable contact is brought into and out of contact with the main fixed contact by opening and closing the handle, and the main movable contact is separated from the main fixed contact An opening / closing mechanism having a tripping portion forcibly opening, a relay contact device having a relay movable contact and a relay fixed contact interposed in series with the main contact device in the electric circuit between the input and output terminals, and an external signal An electromagnet device having a movable iron core for moving a relay movable contact to and from the relay fixed contact, a zero-phase current transformer for detecting an unbalanced current flowing in the electric circuit of each pole, and the zero-phase current transformer When an equilibrium current is detected An earth leakage detection board on which a switching element that is turned on is mounted, and a tripping coil that is energized when the switching element is turned on to operate the tripping portion to move the main movable contact from the main fixed contact In a remote control type earth leakage breaker equipped with an electromagnet for forced opening,
The electromagnet device is disposed outside the coil in parallel with a coil frame in which a coil is wound, the movable iron core that is reciprocated in an inner hole of the coil frame, and a moving direction of the movable iron core. A U-shape comprising a first yoke, an intermediate piece and both end pieces connected from both ends thereof is formed, the intermediate piece is opposite to the coil of the first yoke, and the both end pieces are the first yoke. A second yoke disposed so as to sandwich both ends thereof, and a permanent magnet interposed between the first yoke and the intermediate piece of the second yoke,
The leakage control substrate is disposed at a position where one of the intermediate piece or the both end pieces of the second yoke is interposed between the leakage detection substrate and the permanent magnet. Type earth leakage breaker.   A gap is formed between the permanent magnet and the both end pieces of the second yoke, and the leakage detection substrate is one of the both end pieces of the second yoke between the leakage detection substrate and the permanent magnet. The remote control type earth leakage circuit breaker according to claim 1, wherein the circuit breaker is disposed at a position where an interposition is present.

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