JP4206993B2 - 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.

  As a conventional example, there is one in which a 1 pole type remote control breaker and a 1 pole type earth leakage breaker are arranged side by side and integrated (see Patent Document 1).

  In this device, the movable contact on the main contact device side is opened and closed by opening and closing the handle, and the movable contact on the relay contact side is opened and closed by remote control.

  Here, both the test switch and the trip coil on the earth leakage breaker side are more energized than the movable contact on the main contact device side so that the movable contact on the main contact device side is energized when the contact is open and the test switch and trip coil do not burn out. Generally, it is connected to the output terminal side.

  However, when the connection points of both poles of these test switches and tripping coils are connected to the output terminal side rather than the movable contact on the main contact device side, the movable contact of the main contact device is opened to measure the load insulation resistance. In particular, since the two electrodes are electrically connected to each other through the trip coil, the wiring from the output terminal to the load must be removed, and the work of measuring the insulation resistance of the load is troublesome. It was.

  On the other hand, when both test poles are connected to the input terminal side with respect to the movable contact on the main contact device side, there is a risk that the test switch may be burned by continuing to press the test switch as described above.

  There is no problem as long as the leakage detection device controls the test switch so that no current flows when the movable contact on the main contact device side is opened, but in that case, the leakage detection device itself is expensive. It will be a thing.

In addition, when one connection point of the trip coil is connected to the input terminal side than the movable contact on the main contact device side, and the other connection point is connected to the output terminal side than the movable contact on the relay contact side, When measuring the insulation resistance of the load, it is not necessary to remove the wiring from the output terminal to the load. However, there is a problem that a potential is generated on the load side even when the movable contact of the main contact device is open.
JP 7-240142 A

  The present invention has been made in view of such a reason, and the object of the present invention is to prevent the test switch from being burned out by continuously pressing the test switch even when using an inexpensive leakage detector, and to provide a trip coil. It is an object of the present invention to provide a remote control type earth leakage breaker that does not cause the trip coil to burn out due to continuous current flow and facilitates the work of measuring the insulation resistance of the load.

  A remote control type earth leakage breaker according to the present invention includes a main body, a plurality of input / output terminals arranged at both ends of the main body, and a main circuit interposed between the input / output terminals for each pole. A main contact device having a movable contact and a main fixed contact. The opening / closing mechanism has a handle disposed on the upper surface of the container body, and has a configuration in which the main movable contact of each pole is brought into contact with and separated from the main fixed contact of each pole by opening / closing the handle. Has a tripping portion that forcibly opens the main fixed contact. Further, 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 path between the input / output terminals of each pole, and the relay movable contact by the external signal And an electromagnet device to be brought into contact with and separated from. Further, the zero-phase current transformer includes a zero-phase current transformer that detects an unbalanced current between the poles flowing in the electric circuit, and a test switch that is connected between the electric circuits and energizes when turned on. And an unbalanced current generating circuit for detecting the unbalanced current. The leakage detecting device includes an electromagnet provided with a tripping coil connected between the electric paths, and includes a switching element that is driven based on an output of the zero-phase current transformer and energizes the tripping coil. The tripping portion of the opening / closing mechanism is actuated by energization of the release coil to forcibly open the main movable contact from the main fixed contact. The main contact device is connected to the input terminal side of the electric circuit more than the relay contact device. At least one connection point of the test switch to the electric circuit is connected to the output terminal side of the main contact device, and at least one connection point of the trip coil to the electric circuit is connected to the output terminal side of the main contact device. And the input terminal side of the relay contact device.

  In the above configuration, both connection points of the unbalanced current generation circuit and the trip coil are connected to the electric circuit between the main contact device and the relay contact device.

The main fixed contact and the relay fixed contact are fixed to a common conductor for each pole, and connection points for energizing both ends of the unbalanced current generating circuit and the trip coil are connected to the conductor. ing.

  According to the remote control type earth leakage breaker of the present invention, since at least one connection point of the test switch is connected to the output terminal side of the main contact device, the test switch is opened when the main contact device is opened by pressing the test switch. Even if the button is kept pressed, no current flows through the test switch, and the test switch can be prevented from being burned out by keeping the button pressed. In addition, since at least one connection point of the trip coil is connected to the output terminal side of the main contact device, the trip coil is not energized after the main contact device is opened, and current is supplied to the trip coil. There is no possibility that the tripping coil continues to flow and burns out. In the case of an inexpensive circuit in which the switching element turns off only when the main contact is opened and no current flows, at least one pole of the trip coil is connected to the input terminal side of the relay contact device. If the relay contact device is in the open state, it is possible to measure the insulation resistance of the load without disconnecting the electric wire to the load from the output terminal.

  In addition, if both poles are connected between the main contact device and the relay contact device, the test switch and the trip coil can be connected to the test switch and the trip coil together at two locations, and the wiring is reduced. It becomes easy.

  Further, since the test switch and the trip coil are connected to the conductive plate to which the main fixed contact and the relay fixed contact are fixed, the connection portion between the test switch and the trip coil does not move, and the connection portion is disconnected. There is little fear.

  A two-pole remote control type earth leakage breaker according to a first embodiment of the present invention will be described with reference to FIGS. The container 1 includes a case 2 whose side is open, a side cover 3 that closes the opening, an input side partition member 4 and an output side partition member 5. 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.

  The remote control terminal 90 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 an 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.

  2 and 4, the open / close mechanism 30 is in the on state, and the movable frame 17 is rotated by the handle 14 in a state where one end of the lever 16 is locked to the locking portion 22 as shown in FIG. 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. 2 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 rotates 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 through the center of the coil frame 37, and a coil 38 is wound around the outer periphery of the coil frame 37. A pair of inner yokes 39 to be fixed iron cores are arranged on both upper and lower sides of the coil 38, and a pair of substantially U-shaped outer yokes 40 to be fixed iron cores are arranged on the outer sides of the coils 38. A permanent magnet 41 for making the both yokes different in polarity is interposed therebetween, and an armature plate 42 is provided between both end portions of the outer yoke 40 and the inner yoke 39 at both end portions of the plunger 36. 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 opposed to the plunger 36 via a relay movable frame 44 is disposed at one end of the plunger 36, and a printed circuit board 50 having a switch 48 is disposed opposed to the other end. 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 between the printed circuit boards 49 and 50 and the coil 38, a lead wiring board 52a and a lead wire 52 are mounted. It is wired by.

  FIG. 20 shows an ON state of the plunger 36 with the relay movable contact 9a turned ON. The permanent magnet 41 latches one end portion of the plunger 36 in a state of protruding outward. The OFF state of the relay movable contact 9a is a state in which the plunger 36 has moved to the opposite side. When the coil 38 is energized in one direction, the plunger 36 is moved to the opposite side and latched by the permanent magnet 41. Yes. 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.

  Note that 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 portion of the case 2 adjacent to the opening 18 for the handle, and the shaft portion 56a of the display body 56 for displaying the state of the relay is formed inside the case 2 and the output side partition member 5. It is pivoted between. An engaging portion 56b is formed in the display body 56 in a notch, and the upper end portion of the display lever 54 is engaged with the engaging portion 56b. As the relay movable frame 44 is turned on or off by the operation of the plunger 36, the display body 56 is turned, and an ON or OFF display shown on the display body 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 attached to the mounting substrate 101 on which the leakage detection circuit 105 is mounted, and is disposed in a space between the plug-in terminal 6 in the partition member 4 of the container 1 and the abnormal current detection device 7. Yes. 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. 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). 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 housed in the output-side partition member 5, and the tripping coil 106 constituting the coil of the electromagnet 103 is connected to the electric path between the main contact device 8 and the relay contact device 9, that is, the arc driving body 66 via the switching element 104. It is connected. Further, the bridge member 108 that reaches the output side partition member 5 extends from the input side partition member 4, and the slide member 110 is slidably supported in the guide groove 109 formed on the side surface of the bridge member 108. One end of 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 to 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 108 a through which the shaft 14 a of the handle 14 is passed, and a wiring groove 108 b is formed in parallel with the guide groove 109, and allows the wiring between the electromagnet 103 side and the printed board 101 to pass therethrough. The trip coil 106 is energized by the operation of the switching element 104, the slide member 110 is slid against the spring 111 by the plunger of the electromagnet 103, the trip member 20 is driven by the drive unit 112, the lever 16 is tripped, and the opening / closing mechanism 30. Trip operation.

The unbalanced current generation circuit 115 includes a test switch 116, a resistor 117, and a linkage portion 115a of the zero-phase current transformer 100. Both ends of the unbalanced current generation circuit 115 are connected to a pair of arc drivers 66 as shown in FIGS. Yes. 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 attached to a hole 125 formed over the side cover 3 on the upper surface of the output side partition member 5. is doing. In addition to the test button 118, a leakage indicator 120 is provided in a hole 126 formed on the upper surface of the output-side partition member 5 across the side cover 3. When the test button 118 is pressed, the test switch 116 is turned on, and a pseudo unbalanced current is generated. As a result, an output appears on the secondary side of the zero-phase current transformer 100, which is detected by the leakage detection circuit 105, and the switching element 104 Is turned on, thereby energizing the tripping coil 106, 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. Reference numerals 122 and 122a denote lead wirings.

  A second embodiment of the present invention will be described with reference to FIG. That is, in the first embodiment, one of the input terminals of the leakage detection device 102 is connected to the arc drive 66 of the one-pole electric circuit, and the other is connected to the other pole between the relay contact device 9 and the speed determining terminal 10. Connected to electrical circuit. One end of the unbalanced current generating circuit 115 is connected to a one-pole circuit between the zero-phase current transformer 100 and the main contact device 8, and the other is connected between the relay contact device 9 and the quick connection terminal 10. It is connected to the electric circuit of another pole.

It is a disassembled perspective view of the remote control type earth-leakage circuit breaker of the 1st Embodiment of this invention. It is a front view of the ON state which looked at the inside. 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 the electromagnet apparatus of an ON state. It is an operation circuit diagram of an electromagnet device. It is a wiring diagram around the current transformer of a 2nd embodiment.

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 60 Main movable contact
61 Main fixed contact
62 Relay fixed contact 63 Relay movable contact 66 Arc driver 100 Zero phase current transformer 102 Electric leakage detection device 104 Switching element 106 Trip coil 116 Test switch

Claims (1)

A main contact having a main body, a multi-pole input / output terminal disposed at both ends of the main body, and a main movable contact and a main fixed contact that are interposed for each pole in a circuit between the input / output terminals. The main movable contact of each pole and the main fixed contact of each pole by the opening and closing operation of the handle, and the main movable contact An open / close mechanism having a tripping portion forcibly opening the main fixed 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 of each pole A relay contact device, an electromagnet device that contacts and separates the relay movable contact with the relay fixed contact by an external signal, a zero-phase current transformer that detects an unbalanced current between the poles flowing in the electric circuit, and the electric circuit Connected and energized by ON operation An unbalanced current generating circuit for detecting a pseudo unbalanced current in the zero-phase current transformer, and an electromagnet provided with a tripping coil connected between the electric circuits. A switching element that is driven based on the output of the flow device and energizes the tripping coil, and the energization of the tripping coil activates the tripping portion of the switching mechanism to connect the main movable contact to the main fixed contact With a leakage detection device for forcibly opening the
The main contact device is connected to the input terminal side of the electric circuit than the relay contact device, and the connection point to at least one of the electric circuits of the unbalanced current generating circuit is connected to the output terminal side of the main contact device. And a remote control type earth leakage breaker in which a connection point to at least one of the electric paths for energizing the trip coil is connected to the output terminal side of the main contact device and to the input terminal side of the relay contact device In
The unbalanced current generating circuit and the trip coil are connected at both connection points to the electric circuit between the main contact device and the relay contact device,
A remote control in which the main fixed contact and the relay fixed contact are fixed to a common conductor for each pole, and both ends of the unbalanced current generation circuit and connection points for energizing the trip coil are connected to the conductor. Type earth leakage breaker.

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