CN1499540A - Electromagnetic operation device, electromagnetic operation type switch device and electromagnet control device - Google Patents

Abstract

The present invention relates to an electromagnetic operating device, an electromagnetic operating type switching device, and an electromagnet control device, and more particularly to an electromagnetic operating device and an electromagnetic operating type switching device that operate a switch such as a circuit breaker by electromagnetic force, and an electromagnet control device that controls driving of an electromagnet as a driving source for driving the switch. The design structure of the invention can improve the operation performance. The structure is as follows: an electromagnet (14) is arranged at the central lower position of a shell (10), a capacitor (16) and a control circuit board (18) are respectively arranged at two sides of the electromagnet (14), an auxiliary contact (34), a display board (36) and a counter (38) are arranged at the upper part of the electromagnet (14), and the auxiliary contact (34), the display board (36) and the counter (38) are arranged on a board (56) to form a whole with the electromagnet, so that the capacitor (16) and the control circuit board (18) can be pulled out from the front.

Description

Solenoid operating device and solenoid operated switchgear and solenoid control device

technical field

The present invention relates to an electromagnetic operating device, an electromagnetic operating switch device, and an electromagnet control device, and more particularly to an electromagnetic operating device and an electromagnetic operating switch device for operating a switch such as a circuit breaker by using electromagnetic force, and controls as a driving source for driving a switch. Solenoid control device for electromagnet drive.

Background technique

When operating a switch such as a circuit breaker, it can be operated by using the electromagnetic force generated by the electromagnet (refer to pages 2-4 of Japanese Patent Application Laid-Open No. 2002-217026, FIGS. 1-3 ).

On the other hand, when driving the electromagnet, it is tested to install a capacitor that stores the electric energy used to excite the coil of the electromagnet, and to control the conduction direction of the current supplied to the electromagnet coil by the capacitor in response to the closing command or opening command of the switch. The control circuit board to make the electromagnet work stably. In this case, an electromagnetically operated switch device can be constituted by combining an electromagnetically operated device and a switch.

For example, when combining an electromagnetic operating device and a magnetic latch type electromagnetic operating circuit breaker to form an electromagnetic operating switchgear, it can be composed of a microcomputer, a logic IC (CPLD/FPGA) or a mechanical relay, etc. The current required by the instruction is a low-power switching device of about tens of milliamperes.

When the electromagnetic operating device is installed adjacent to the circuit breaker, etc., the electromagnet, capacitor, control circuit board, etc. are all installed in the casing, and the electromagnet and the switch are connected by a linkage mechanism. However, when the electromagnet, capacitor and control circuit board are installed in the housing (housing), since the work has to be performed in the narrow space inside the housing, installation work, inspection and maintenance work, etc. must be considered when arranging the components.

In addition, for electromagnets, in order to reduce costs, attempts have been made to use steel pipes of standard sizes prescribed by JIS standards or the like as side yokes. However, when switches such as circuit breakers and electromagnets are jointly arranged in the casing, although the usual structure is to install the electromagnet in the casing closer to the front side of the casing than the switch; but because the depth dimension of the casing is smaller than the width dimension, In order to reduce the occupied space, it is preferable to make the cross-sectional shape of the electromagnet into a rectangle. Therefore, the structure adopted is that the side yoke is formed by stacking thin steel plates, and the movable iron core is formed by using a square cross section, and the iron core and coil are fixed. However, in order to form the moving iron core etc. with a square cross-section, it is necessary to form a standard-size circular steel pipe into a square shape. Therefore, the man-hours for processing and assembly are increased, and when the side yoke is formed by stacking thin steel plates, it is necessary to Increasing the number of parts increases the cost.

In addition, when using the control circuit board to control the electromagnet, it is necessary to control the energization direction of the electromagnet coil according to the closing command or the opening command. Miniaturization of electronic components and mechanical components on the control circuit board. Furthermore, when constituting the above-mentioned electromagnetically operated switchgear, since the current required by the closing command and the opening command is about tens of milliamperes, as a relay for outputting the opening command or closing command to the circuit breaker, a relay that has been popular in recent years can be used. digital relays.

However, there are still a large number of old-type analog relays as relays that output an opening command to the circuit breaker. When an electromagnetically operated switchgear is used on a switchboard equipped with analog relays, it is impossible to form an open circuit that requires a current of several amperes. The path to the directive.

Contents of the invention

One of the objects of the present invention is to provide an electromagnetic operating device which has an arrangement and a structure which can improve the operating performance.

The second object of the present invention is to provide an electromagnet operating device, which can reduce the man-hours required for manufacture, and can also form an electromagnet whose depth dimension is smaller than the width dimension.

The third object of the present invention is to provide an electromagnet control device, which can reduce the size of the control device for controlling the direction of energization to the electromagnet coil according to the closing command and the opening command.

A fourth object of the present invention is to provide an electromagnetically operated switch device which can be applied to both digital relays and analog relays.

In order to achieve the above-mentioned first invention object, the feature of the electromagnetic operating device of the present invention is: the shaft connected with the movable iron core of the electromagnet is connected to the switch device through a link mechanism, and the electromagnetic operation device generated by the electromagnet is configured to When the driving force generated together is transmitted to the electromagnetic operating device of the switch device, the electromagnet is the center, and the capacitors that store the electric energy used to excite the electromagnet coil are independently arranged, and the capacitors that respond to the closing command or opening of the switching device are independently arranged. A control circuit board that controls the direction of the current supplied to the electromagnetic coil from the capacitor to open the command.

In addition, in order to achieve the above-mentioned second invention object, the electromagnetic operating device of the present invention is characterized in that: its structure is that the shaft connected with the movable iron core of the electromagnet is connected to the switch device through a link mechanism, and is configured to When the driving force generated together with the electromagnetic force generated by the electromagnet is transmitted to the electromagnetic operating device of the switchgear, the above-mentioned electromagnet is composed of a movable iron core, a fixed iron core, a coil and an iron cover plate, and an oblong cylinder is used. The cylindrical body constitutes the above-mentioned iron cover plate, and the short diameter side of the above-mentioned cylindrical body is arranged in line with the depth direction of the above-mentioned switchgear.

In addition, in order to achieve the above-mentioned third invention object, the feature of the electromagnet control device of the present invention is: its structure is, as the energization circuit that supplies the electric energy of the capacitor that stores the electric energy from the power supply to the electromagnetic coil, it has An opening mechanism that forms an energized circuit for separating the movable iron core and the fixed iron core when it occurs; as an energized circuit opposite to the energized direction of the energized circuit of the above-mentioned disconnecting mechanism to the above-mentioned electromagnetic coil, it has a function that when the closing command occurs A closing mechanism that forms an energized circuit for making the above-mentioned movable iron core and the fixed iron core contact each other; the structure of the above-mentioned disconnecting mechanism includes connecting the energization for making the above-mentioned movable iron core and the fixed iron core separate from each other in response to the above-mentioned disconnection command Switching relay in the circuit; the structure of the closing mechanism includes a switching relay connected to the energized circuit for making the movable iron core and the fixed iron core contact each other in response to the closing command.

Furthermore, in order to realize the above-mentioned fourth invention object, the feature of the electromagnetically operated switchgear of the present invention is: there are electromagnets, capacitors and control circuit board electromagnetic operating devices, and are connected with the above-mentioned electromagnetic operating devices by a link mechanism A switching device (circuit breaker); and a bypass circuit that bypasses a part of the above-mentioned disconnection command to the above-mentioned power supply through a resistor.

Description of drawings

Fig. 1 is a front view of the electromagnetic operating device.

Fig. 2 is a side view of an electromagnetically operated switch device.

Fig. 3 is an explanatory diagram for explaining the operation when the state detection mechanism is closed.

Fig. 4 is an explanatory diagram for explaining the operation when the state detection mechanism is turned off.

Fig. 5(a) is a side view for explaining the state before the locking lever is raised.

Fig. 5(b) is a front view of its main part.

Fig. 6(a) is a side view for explaining a state in which the interlock lever has been raised.

Fig. 6(b) is a front view of its main part.

Fig. 7(a) is a side view for explaining the state where the lock lever cannot be raised.

Fig. 7(b) is a front view of its main part.

Fig. 8(a) is a side view for explaining the manual switching operation with the front cover.

Fig. 8(b) is a front view of its main part.

Fig. 9(a) is a side view for explaining the manual insertion operation when the front cover is removed.

Fig. 9(b) is a front view of its main part.

Fig. 9(c) is a top view of the handle used for manual insertion operation.

Fig. 10 is a block diagram for explaining the circuit configuration of the electromagnet control device.

FIG. 11 is a circuit configuration diagram of a charging circuit.

FIG. 12 is an explanatory diagram for explaining the hysteresis characteristic of the post-charging detection circuit.

Fig. 13 is a characteristic diagram for explaining the CO operation of the circuit breaker.

Fig. 14 is a characteristic diagram for explaining O operation and CO operation of the circuit breaker.

FIG. 15 is a characteristic diagram for explaining the relationship between the capacitor charging voltage and the capacitor charging energy.

FIG. 16 is a block diagram illustrating a circuit configuration of a control logic unit.

FIG. 17 is a timing chart for explaining the operation of the control logic unit during the closing operation.

FIG. 18 is a timing chart for explaining the operation of the control logic unit during the opening operation.

Fig. 19 is a block diagram showing another embodiment of the electromagnet control device.

20( a ), ( b ) are circuit configuration diagrams for explaining the operating principle of the overcurrent relay.

Fig. 21 is a block diagram showing an embodiment in which a bypass resistor is arranged in an electromagnetically operated switchgear.

Fig. 22 is a perspective view when a relay box is installed in the electromagnetically operated switchgear.

Fig. 23 is a circuit configuration diagram when a relay box is connected to the electromagnetically operated switchgear.

Fig. 24 is a longitudinal sectional view of the electromagnet.

Fig. 25 is a longitudinal sectional view taken along line A-A shown in Fig. 24 .

Fig. 26 is a longitudinal sectional view taken along line B-B shown in Fig. 24 .

Fig. 27 is a longitudinal sectional view taken along line C-C shown in Fig. 24 .

Fig. 28 is an explanatory diagram for explaining a pressing method of an iron cover plate.

Fig. 29 is an exploded perspective view of the electromagnet.

Detailed ways

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of an electromagnetically operated device of the present invention, and FIG. 2 is a side view of an electromagnetically operated switchgear including an electromagnetically operated device and a circuit breaker. In Fig. 1 and Fig. 2, the electromagnetic operating device has a box-shaped casing 10, the casing 10 has an opening 12 on the front, and a front cover (omitted in the figure) is detachably fixed on the front of the casing 10. In the housing 10, a capacitor 16 and a control circuit board 18 are independently arranged with the electromagnet 14 as the center, the electromagnet 14 is fixed at the central position of the housing bottom with bolts and nuts, and the capacitor 16 and the control circuit board 18 are respectively fixed on on opposite sides of the enclosure. That is, the capacitor 16 is fixed on the left side of the housing 10 with bolts and nuts, and the control circuit board 18 is fixed on the right side of the housing 10 through the gasket 20 with bolts and nuts.

Have again, while secondary plug 22, cable 24,26,28,30 are housed in shell 10, also be equipped with the auxiliary contact 34 of the state detecting mechanism of the vacuum circuit breaker (vacuum tube) 32 state that detects as switch, display board 36. Counter 38. The secondary plug 22 is fixed on the upper part of the casing 10 with bolts and nuts, and a power supply cable, a signal cable from a digital relay or an analog relay, etc. are connected to the secondary plug 22 . The cable 24 is connected to the positive pole and the negative pole of the capacitor 16 , the cable 26 is connected to the auxiliary contact 34 , and the cable 28 is connected to the control circuit board 18 through the connector 40 . The cable 28 and the cable 30 are crimped at the portion of the terminal 43 during installation work. The limit switch 42 is fixed on the bottom of the housing 10 through hardware 44 . The limit switch 42 switches contacts according to the position of an interlock lever 46 disposed in the housing 10 and can be moved up and down in the vertical direction, and a signal indicating the switching state of the contacts is supplied to the control circuit board 18 .

The control circuit board 18 receives the electric energy supplied by the secondary plug 22, and at the same time receives the signal of the closing command or the disconnecting command from the digital relay or the analog relay, etc., and is also installed on it for controlling the driving of the electromagnet 14 and performing logic operations. A logic part, a charging circuit for charging and discharging the capacitor 16, a relay and a relay contact (omitted in the figure) for controlling the direction of energization of the coil (electromagnet coil) 48. Furthermore, on the control circuit board 18, a light-emitting diode 50 for displaying the end of charging of the capacitor 16 is also installed, and at the same time, a "connection" button (button button) for sending a closing command to the vacuum circuit breaker 32 by manual operation is also installed. switch) 52, and a "shutdown" button (push button switch) 54 for outputting an opening command (opening command) to the vacuum circuit breaker 32 by manual operation.

Auxiliary contact 34 , display panel 36 , and counter 38 are respectively arranged on the upper part of electromagnet 14 and connected to plate 56 as state detection mechanisms of vacuum circuit breaker 32 , and are integrally formed with electromagnet 14 . The structure of electromagnet 14 is to have movable iron core 58, fixed iron core 60, coil 48, axle 62, two movable flat plates 64,66, permanent magnet 68, make cylindrical iron cover plate 70,72, iron The supporting plates 74,76, fixed rod 78 and the like. Coil (electromagnetic coil) 48 is contained in the bobbin 48a that is arranged between support plate 74 and support plate 76, and fixed rod 78 is fixed on the base 80 while being fixed on the bottom of shell 10 with bolt, nut.

The shaft 62 is arranged at the center of the electromagnet 14 and is arranged along the vertical direction. In addition, the structure of the shaft 62 is: its upper part is inserted in the through hole 82 of the plate 66, and its lower part is inserted in the through hole 84 of the support plate 76 and can be lifted and slid freely. On the outer peripheral surface of this axle 62, movable iron core 58, movable flat plate 64,66 are fixed with nut, and the bottom of axle 62 is connected axle 88 by bearing pin 86. Although two movable flat plates (steel plates) 64 and 66 are installed on the shaft 62, this is to reduce the leakage flux to the iron cover plate 70 in order to increase the relative distance between the upper movable flat plate 64 and the iron cover plate 70 . Further, a support plate 90 is connected to the lower portion of the shaft 62 , and an annular shut-off spring 92 that draws a circle around the axis of the shaft 62 is installed between the support plate 90 and the base 80 . The breaking spring 92 is made so that it can apply an elastic force to the shaft 62 through the support plate 90 for moving the movable iron core 58 away from the fixed iron core 60 . In addition, a permanent magnet 68 is arranged around the movable iron core 58 , and the permanent magnet 68 is fixed to the mounting plate 74 . The fixed iron core 60 is fixed on the mounting plate 76 with bolts.

In addition, the lower portion of the shaft 88 is connected to a pair of levers 96 via a pin 94 . The lever 96 constitutes an element of a link mechanism that changes the transmission direction of the driving force, and is connected to the rod 100 through the shaft 98; and the driving force is generated together with the electromagnetic force generated by the electromagnet 14. The rod 100 is connected to the connecting plate 104 through a pin shaft 102 . In addition, a stopper pin 106 is fixed at the end of the lever 96;

The connecting plate 104 is inserted into the insulating support 110 fixed on the base 80 so that it can move freely (reciprocating) up and down, and a pressure spring pressing plate 112 is formed on the upper side of the connecting plate 104 . A through hole is opened on the pressure spring pressing plate 112 , the axial end of the insulating rod 114 is inserted into the through hole, and a bolt 118 is fixed to the through hole washer 116 at the end. Furthermore, a pressure spring 120 is installed between the pressure spring pressing plate 112 and the bottom of the insulating rod 114 . The upper part of the insulating rod 114 is connected to the movable feeder 122 through the flexible conductor 121 and simultaneously connected to the movable conductor 124 of the vacuum circuit breaker 32 . The movable conductor 124 is connected to a movable contact (not shown), and a fixed contact (not shown) is arranged opposite to the movable contact. The fixed contact is connected to the fixed conductor 126 and is housed in the insulating cylinder 128 together with the movable contact. A vacuum state is maintained inside the insulating cylinder 128 . The fixed conductor 126 is connected to a fixed feeder 129 , and the fixed feeder 129 is fixed on the insulating support 110 . The upper conductor 130 is connected to the fixed feeder 129 , the lower conductor 132 is connected to the movable feeder 122 , and power cables such as power distribution wires are connected to the conductors 130 and 132 .

Therefore, when the closing command was input to the control circuit board 18, the coil (electromagnetic coil) 48 of the electromagnet 14 was energized due to the signal from the control circuit board 18, and around the coil 48, the movable iron core 58 was connected → fixed. Iron core 60 → mounting plate 76 → cover plate 72 → mounting plate 74 → a magnetic field is formed in the path of movable iron core 58, thereby acting downward attractive force on the end face of the bottom side of movable iron core 58, so that movable iron core 58 Move to the side of the fixed iron core 60 , and hold the movable iron core 58 on the fixed iron core 60 . At this time, since the direction of the magnetic field formed by the permanent magnet 68 is also the same as the direction of the magnetic field accompanying the excitation of the coil 48, the movable iron core 58 moves to the fixed iron core 60 side with an increased attractive force.

When the closing action (attracting action) is performed by the electromagnet 14 , the shaft 62 moves downward against the elastic force of the opening spring 92 , and the driving force generated together with the electromagnetic force generated by the electromagnet 14 is transmitted to the lever 96 . The driving force is transmitted to the connection plate 104 via the shaft 98 and the rod 100 , so that the movable conductor 124 moves up, the movable contact contacts the fixed contact, and the vacuum circuit breaker 32 closes. During the closing action of the vacuum circuit breaker 32, although the bearing spring 120 is not compressed before the fixed contact contacts the movable contact, it is compressed when the fixed contact contacts the movable contact, and then is compressed until the closing action ends. On the other hand, the breaking spring 92 is always in a compressed state during the closing operation of the vacuum circuit breaker 32 .

Subsequently, the control circuit board 18 is input with a disconnection command (open circuit command). When the signal corresponding to the disconnection command is output to the coil 48 by the control circuit board 18, a current opposite to that of the closed direction flows through the coil 48. In the coil 48 48 forms a magnetic field opposite in direction to that of the closing action. At this time, the magnetic flux generated by the coil 48 and the magnetic flux generated by the permanent magnet 68 cancel each other out, because the attractive force of the axial end surface (lower surface) of the movable iron core 58 is greater than the elastic force generated by the breaking spring 92 and the pressure spring 120. Weaker, the movable core 58 moves away from the fixed core 60 and moves upward. When the shaft 62 moves upward with the movement of the movable iron core 58, it is linked with the upward movement of the lever 96, the connecting plate 104 moves downward, the movable contact of the vacuum circuit breaker 32 leaves the fixed contact, and the contact between the fixed contact and the movable contact is released, and the opening operation (breaking operation) of the vacuum circuit breaker 32 is realized. At this time, when the closed state held by the electromagnet 14 is released, the compressed pressure spring 120 stretches, and when the pressure spring pressure plate 112 contacts the backing plate 116, the fixed contact and the movable contact of the vacuum circuit breaker 32 The contact is released, and the breaking action of the vacuum circuit breaker 32 and the opening (release) action of the electromagnet 14 are realized simultaneously.

During the closing or opening action (breaking action) of the vacuum circuit breaker 32 , the closing or opening state of the vacuum circuit breaker 32 is detected by the auxiliary contact 34 , the display panel 36 , and the counter 38 .

Specifically, as shown in FIG. 2 , a rod 134 is connected to the top of the shaft 62 connected to the movable iron core 58 . A through hole (not shown) is formed in an upper portion of the rod 134, and a pin shaft 136 is inserted into the through hole. The pin shaft 136 is inserted into the long holes of the levers 138 , 140 , and the rod 134 is connected with the lever 138 and the lever 140 through the pin shaft 136 . The lever 138 is connected to the shaft auxiliary joint 34 via the shaft 142 . The auxiliary contact 34 has an a contact and a b contact, and the opening and closing of each contact coincides with the vertical movement of the shaft 62 . That is, the auxiliary contact 34 has a structure such that the a-contact enters when the shaft 142 rotates in one direction, and the b-contact enters when the shaft 142 rotates in the opposite direction. At this time, an elongated hole is formed on the lever 138. Since the pin shaft 136 is inserted into the elongated hole, the shaft 142 can be rotated in accordance with the up and down movement of the shaft 62, so that the a contact point and the b contact point can be made to coincide with the rotation of the shaft 142. The contacts enter alternately.

The lever 140 is connected with the fixed plate 146 through the pin shaft 144 , and the bottom of the fixed plate 146 is fixed on the plate 56 . The lever 140 is configured to be rotatable around the pin shaft 144 in accordance with the vertical movement of the shaft 62 . In addition, the front end of the lever 140 is integrated with the display panel 36, and the upper part of the front side of the display panel 36 is marked with the words "connected", and the lower part is marked with the words "cut off". When the display panel 36 was in the position shown in Figure 2, the text of "cut off" could be seen from the front side of the casing 10; Into" text can be seen from the front side of the housing 10. That is, the structure is such that the words "connect" or "cut" can be seen from the front side of the housing 10 in accordance with the vertical movement of the shaft 62.

In addition, a spring 148 is disposed on the display panel 36 , and one end of the spring 148 is connected to an axial end of the lever 140 , and the other end thereof is connected to the counter lever 150 of the counter 38 . The spring 148 expands and contracts correspondingly with the rotation of the lever 140, and makes the counter lever 150 rotate around the pin shaft 152 (in the range of about 45°), and every time the counter lever 150 rotates once, the switch action of the vacuum circuit breaker 32 is activated. The number of times is counted mechanically.

Next, the specific operation of the state detection means will be described. First, when the closing action of the vacuum circuit breaker 32 is performed, as shown in FIG. , the b contact of the auxiliary contact 34 is disconnected, and then the a contact is connected. At this time, the display panel 36 rotates in the anti-time direction around the pin shaft 144 due to the lever 140, as shown in FIG. Further, the spring 148 is compressed, and the counter lever 150 rotates about 45° around the pin shaft 152 . Thus, the counter 38 counts the completion of one closing action of the vacuum circuit breaker 32 .

Then, when the vacuum circuit breaker 32 starts the breaking operation, the shaft 62 moves upward from the position shown in FIG. 4 . Linked with the movement of the shaft 62, the lever 138 rotates counterclockwise around the shaft 142, the shaft 142 of the auxiliary contact 34 rotates, the a contact of the auxiliary contact 34 is opened, and then the b contact is closed. Furthermore, as the shaft 62 moves up, the lever 140 rotates clockwise around the pin shaft 144, and as shown in FIG. At this time, as the lever 140 rotates, the spring 148 expands, and the counter lever 150 rotates about 45° around the pin shaft 152 . In addition, it is preferable to attach the spring 148 so that it is slightly loosened so that the characters "connected" of the display panel 36 can be seen from the front.

In this way, whenever the vacuum circuit breaker 32 performs a closing operation or an opening operation (opening operation), the auxiliary contact 34 , the display panel 36 , and the counter 38 can be used to detect the closed or open state of the vacuum circuit breaker 32 .

On the other hand, four wheels 154 are connected to both sides of the base 80 so that it can move on the mounting platform 156 . That is, the electromagnetically operated switchgear including the housing 10 with the electromagnet 14 and the insulating bracket 110 with the vacuum interrupter 32 can be taken out from the front of the housing 10 by moving the wheels 154 while being fixed on the base 80 .

However, in this embodiment, the vacuum circuit breaker 32 is in the disconnected state at the "cut off" position of the display panel, and the interlock lever 46 is lifted as a condition, since the vacuum circuit breaker 32 can be taken out (pulled out), as shown in Figure 5 Shown, on the mounting platform 156 is fixed on the clamping plate 162 of the specified operating position 158 and the breaking position 160, while the interlocking handle 164 is fixed on the upper side of the interlocking rod 46, and the interlocking handle 164 is inserted into the bottom surface of the housing 10. In the operation hole 168 of the installation part 165 . In addition, the locking pin 170 is fixed on the bottom side of the interlocking rod 46. The structure of the interlocking rod 46 is as follows: when the interlocking handle 164 is located below, the bottom of the interlocking rod 46 is inserted into the concave portion of the predetermined operating position 158 and the disconnection position 160. Inside, due to contact with the clamping plate 162, the vacuum interrupter 32 cannot be pulled out.

That is, when the vacuum interrupter 32 is in the disconnected state at the "off" position, and the interlock lever 46 is not lifted, the vacuum interrupter 32 cannot be taken out (pulled out).

At this time, the limit switch 42 serving as an interlock switch is in the on state, and the signal serving as the closing command input to the control circuit board 18 is in a state in which the limit switch 42 will not be turned off.

Subsequently, when the circuit breaker 32 is in the disconnected state and the interlock handle 164 is operated to move upward, as shown in FIG. The vacuum interrupter 32 is pulled out.

That is, the electromagnetically operated switch device is made to be pulled out to the front and moved to the off position 160 . However, at this time, as the interlock lever 46 moves up, the limit switch 42 becomes open, and the input of the closing command to the control circuit board 18 is forcibly opened, so that it is impossible to close the vacuum circuit breaker 32. action.

On the other hand, when the circuit breaker 32 is in the "on" position, in the closed state, as shown in FIG. That is, even if the interlock handle 164 is operated, since the stopper pin 106 contacts the lock pin 170, the upward movement of the interlock lever 46 is prevented, and the vacuum interrupter 32 cannot be pulled out.

In addition, in this embodiment, in order to realize the breaking operation of the vacuum circuit breaker 32 by manual operation even when the front cover 166 is installed on the housing 10, as shown in FIG. At the position where the cover plate 166 is removed, a groove 174 for inserting the disconnecting handle 172 is formed. Since the disconnection operation using the handle 172 requires operating speed, it is made available for all situations where the disconnection operation is necessary. That is, the handle 172 can always be inserted into the groove 174 no matter whether there is a front cover plate 166; When the handle 172 is pushed downward with the bottom of the groove 174 as a fulcrum, the lever 96 rotates counterclockwise around the axis 98, so that the circuit breaker 32 can be disconnected. At this time, only at the beginning, the handle 172 exerts a force exceeding the supporting force of the permanent magnet 68, and then the circuit breaker 32 can complete the breaking action by the elastic force of the breaking spring 92 and the bearing spring 120.

On the other hand, when the vacuum circuit breaker 32 is closed by manual operation, it can only be realized when the front cover 166 is removed. In this embodiment, a closing handle is formed on the base 80 adjacent to the groove 174. The front end of 176 can be inserted into the slot 178.

Since the closing operation using the closing handle 176 does not require an operating speed, its structure is made only when the assembly (or disassembly) operation is performed in the factory. Only when the front cover 166 is removed can the slot 178 be exposed. When closing the vacuum circuit breaker 32 by manual operation using the handle 176 , the front end of the closing handle 176 is inserted into the groove 178 of the base 80 after the front cover 166 is removed. At this time, the handle 176 is inserted into the groove 178 so that the front end of the handle 176 comes into contact with the upper portion of the stopper pin 106 .

Thereafter, the front end of the handle 176 is inserted into the outside of the lever 96 and contacts the upper part of the stopper pin 106. In this state, when the handle 176 is moved upward with the upper side of the groove 178 as a fulcrum, the lever 96 moves upward with the shaft 98. Rotate clockwise around the center to perform closing operation of the circuit breaker 32 .

In this embodiment, the front cover must be removed in order to make the closing action by manual operation, meanwhile, the opening action by manual operation can be completed without removing the front cover 166. On the base 80 The area where the front cover 166 is removed and the area facing the stop pin 106 forms a groove 174 that can be inserted into the handle 172 for disconnection, and the area where the front cover 166 is mounted on the base 80 and faces the area of the stop pin 106. The slot 178 of the handle 176 for operation is closed.

When carrying out the assembling of electromagnetic operation device, electromagnet 14, capacitor 16, control circuit board 18, secondary plug 22, cable 24-28 etc. are sent in the shell 10 from the front side of shell 10 on base 80, and electromagnetic The iron 14 is fixed at the approximate center of the housing 10 , and the capacitor 16 and the control circuit board 18 are respectively fixed at the sides of the housing 10 . At this time, since the auxiliary contact 34, the display panel 36, and the counter 38 are integrated with the electromagnet 14 through the plate 58, they are arranged on the upper part of the electromagnet 14 when the electromagnet 14 is fixed. In addition, the cables 24-28 are integrated with the secondary plug 22, the connector 40 and the limit switch 42, so the secondary plug 22 is fixed on the top of the housing 10 in the state of being connected with the cable 28 and the like. Moreover, when each part of the cable 28 is positioned on the housing 10 , the front end of the cable 24 is connected to the capacitor 16 , and the connector 40 on the front end of the cable 28 is connected to the control circuit board 18 . Then, the lead wire 30 of the coil 48 and a part of the cable 28 are crimped together. Thereafter, when the shaft 88 is connected to the lever 96 through the pin shaft 94, the electromagnet 14 is connected to the vacuum circuit breaker 32 through the link mechanism, thereby completing the assembly work.

As mentioned above, when constituting the electromagnetic operation device as an important factor of the electromagnetic operation type switchgear, the electromagnet 14 is arranged in the approximate center of the case 10, and since the capacitor 16 and the control circuit board 18 are arranged around the electromagnet 14 They are respectively fixed on the side of the housing 10, so that installation, maintenance, and inspection can be easily performed, and workability can be improved, while shock and vibration generated by the electromagnet 14 can be suppressed from being transmitted to the capacitor 16 and the control circuit board 18.

In addition, since the auxiliary contact 34, the display panel 36, and the counter 38 are connected to the panel 56 to be integrated with the electromagnet 14, the structure can be simplified.

In addition, in this embodiment, since the electromagnet 14 is completely covered with iron components, the magnetic field does not leak to the outside of the electromagnet, and malfunction of the control circuit can be avoided. In addition, by arranging a magnetic body outside the electromagnet, such as the case 10, the problem of the characteristic variation of the electromagnet 14 is also solved.

In addition, in this embodiment, among the constituent parts, solid parts are used for the sliding part where one part and the other part slide against each other, and for the bearing part or the rotating part where one part rotatably supports the other part. lubricating material.

Specifically, in the sliding parts of the through hole 82 of the plate 56, the through hole 84 of the mounting plate 76, etc., in the rotating parts or bearing parts of the pin shafts 86, 94, 102, 144, shaft 98, etc., a solid lubricating material is used. Oil-free lubricated bearings. Therefore, the shaft 62 can be smoothly slid (moved up and down), the levers 96, 100, 140, etc. can be smoothly rotated and supported to other parts, and the electromagnet 14 can be made into a sealed structure. .

In addition, since the C-ring is used as the shaft stopper for the pin shaft 94 and the like, workability can be improved compared with the case of using a cotter pin.

Next, the specific structure of the electromagnet control device having the control circuit board 18 as a main component will be described with reference to FIG. 10 . The structure of the electromagnet control device has an AC/DC converter 200 , a charging circuit 202 , a control logic part 204 , and a discharging circuit 206 ; the capacitor 16 and the electromagnet coil 48 are connected to the discharging circuit 206 .

The AC/DC converter 200 receives DC or AC control power sources P and N from the secondary plug, uses them as they are when they are DC, and converts them to DC when they are AC and outputs them to the charging circuit 202 and the control logic unit 204 . The charging circuit slowly charges the capacitor 16 to the maximum voltage after charging the capacitor 16 at a high speed, and utilizes the electric energy stored in the capacitor 16 to control the driving of the electromagnetic coil 48 .

That is, in the discharge circuit 206, a FET (Field Effect Transistor) 208 as a main control device, a pair of relay contacts 210, 212, a diode D1, and a resistor RL are provided. The FET 208 is connected to an energization circuit that supplies electric energy (current) to the electromagnetic coil 48 from the capacitor 16 , and is controlled to switch on and off based on a control signal from the control logic unit 204 . Also connect the relay contacts 210, 212 that constitute a pair of mechanical switching relays into the energized circuit that is supplied with electric energy to the electromagnetic coil 48 by the capacitor 16. The relay contacts 210, 212 use their respective c contacts as common contacts, and have a contacts and b contact. The a contact of the relay contact 210 is connected to one end of the electromagnetic coil 48 , the b contact is connected to the other end of the electromagnetic coil 48 , and the c contact is connected to the positive electrode of the capacitor 16 .

On the other hand, the b contact of the relay contact 212 is connected to one end of the electromagnetic coil 48, the a contact is connected to the other end of the electromagnetic coil 48, and the c contact is connected to the FET208. contact connection.

The relay contacts 210 and 212 that constitute the switching relay generate a disconnection command (disconnection command), the c contact point and the b contact point are connected to each other, as an energizing circuit that supplies the electromagnetic coil 48 with electric energy by the capacitor 16, and is configured to form a movable iron. Breaking means of the energized circuit where the core 58 and the fixed core 60 are separated from each other. Have again, when relay contact 210,212 produces closing instruction, contact is switched, and c contact point is connected with a contact point, as the energizing circuit that is supplied to electromagnetic coil 48 by capacitor 16, is to electromagnetic coil 48 with the energizing circuit as disconnecting device. The energization circuit with opposite energization direction is formed as a energization circuit for making the movable iron core 58 and the fixed iron core 60 contact each other, and a closing device for breaking the energization circuit formed when an opening command is generated. Furthermore, after the relay contacts 210 and 212 form an energizing circuit for closing or an energizing circuit for breaking (opening), the coil current of the electromagnetic coil 48 can be turned on and off by the switching operation of the FET 208 .

That is, only the energization performance is required for the relay contacts 210 and 212 as switching relays, and the FET 208 as the main switch can realize miniaturization and cost reduction by using a large switching capacity.

In addition, since the b contact of the relay contact is used as an opening device, even if the relay contacts 210 and 212 fail to operate, the opening operation can be reliably performed.

In addition, when the coil current of the electromagnetic coil 48 is turned off by the FET 208, an overvoltage proportional to the current conversion rate is generated, and the electromagnetic coil 48 may be damaged.

However, in this embodiment, since the resistance RL and the diode D1 as energy consuming elements are connected in parallel with the electromagnetic coil 48, even if an overvoltage is generated by the electromagnetic coil during the closing operation and the opening operation, the energy accompanying the overvoltage can be Consumed by resistor RL.

As shown in Figure 11, the structure of the charging circuit 202 has a relay coil 214, a relay contact 216, a FET218, a charging end detection circuit 220, a plurality of charging resistors Rb, Rs, a diode D2 and a plurality of Zener diodes ZD ₁ -ZDn, stabilizing The voltage diodes ZD ₁ -ZDn are connected in series with each other and across the capacitor 16, and are configured so that the charging voltage of the capacitor 16 is maintained at a predetermined value.

The resistance values of the charging resistors Rb and Rs are different, and the relationship thereof is set as charging resistor Rb>Rs. The respective charging resistors Rb, Rs are arranged in series with the diode D2 in the circuit connecting the AC/DC converter 200 and the capacitor 16 . Moreover, at the moment of charging start, the charging end detection circuit 220 outputs a high-level signal, so that the FET 218 is turned on and the relay 214 is also turned on, and the relay contact 216 is switched from the b contact point to the a contact point side, and the one with the smaller resistance value is switched to the a contact point. The charging resistor Rs is connected to the circuit for charging the capacitor 16, so that the capacitor 16 can be charged quickly.

On the other hand, when the charging voltage of the capacitor 16 reaches the voltage Vt1 sufficient to drive the electromagnet 14, the charging end detection circuit 220 outputs a low-level charging end signal, and the FET 218 is turned off, and the relay 214 is also turned off. The relay contact 216 is reset from the a contact to the b contact, and the charging resistor Rb with a large resistance value is connected to the charging circuit, and the capacitor 16 is slowly charged to reach the maximum charging voltage Vmax.

In this way, since the charging resistance is switched to the high resistance side after the capacitor 16 reaches the charging voltage _Vt1 , the current flowing in the Zener diodes ZD ₁ -ZDn is not reduced until the charging voltage of the capacitor 16 reaches Vmax, thereby avoiding stabilization. Thermal damage of voltage diodes ZD ₁ -ZDn. In addition, FET 218, relay coil 214, and relay contact 216 constitute a charging resistance switching mechanism.

In addition, as shown in FIG. 12 , in the charge end detection circuit 220, a hysteresis upper limit value Vt ₁ and a hysteresis lower limit value Vt ₂ are set as voltage range values for outputting a charge end signal. After the charging voltage of the capacitor 16 reaches the hysteresis upper limit value _Vt1 , until the charging voltage of the capacitor 16 becomes lower than the hysteresis lower limit value _Vt2 , a low-level signal is output as a charging end signal. The hysteresis lower limit value Vt ₂ is set so that the residual voltage value of the capacitor 16 does not fall below the condition for outputting the charging end signal even if the opening operation is performed immediately after the charging voltage of the capacitor 16 reaches the hysteresis upper limit value Vt ₁ or more. The lower limit of the voltage. In addition, the maximum value Vmax of the charging voltage of the capacitor 16 is set to be 90% or more of the minimum voltage of the control voltage fluctuation range stipulated in the standard of the vacuum circuit breaker 32 which is the operation target of the electromagnetic coil 48 .

That is, there are the following three operating states of the circuit breaker, and the charging resistance Rs and the hysteresis characteristic of the end-of-charging detection circuit 220 must be set to values satisfying the following states.

Type A "O" - 1 minute - "CO" - 3 minutes - "CO"

Type B "CO" - 15 seconds - "CO"

Type R "O" - 0.35 seconds - "CO" - 3 minutes - "CO"

Among them, "O" means opening action (open), and "C" means closing action (close).

The above working conditions are in accordance with JEC-2300-1998. Specifically, type B and type R with short time intervals between working hours are set as a reference.

For example, as shown in Figure 13, in order to make the time from the residual voltage of the capacitor after the "CO" operation until it reaches _Vt1 less than 15 seconds, the resistance value of the charging resistor Rs is determined to meet the requirements of this working state. In addition, as shown in FIG. 14 , by determining the hysteresis lower limit value Vt ₂ , R types of operating states can be achieved, so that the output of the charging end detection circuit 220 can maintain a low level even when it is in the "O" action.

In addition, the maximum value Vmax of the charging voltage of the capacitor 16 determined by the Zener diodes ZD ₁ -ZDn must be equal to or less than the minimum value (minimum voltage) of the control voltage fluctuation range prescribed by the circuit breaker standard. Furthermore, as shown in FIG. 15, since the charging energy of the capacitor 16 is proportional to the square of the charging voltage, it is preferable to set Vmax to 90% or more of the minimum value.

For example, according to the JEC-2300-1998 standard, the control voltage fluctuation range is 75%--125% of the rated control voltage. When the rated control voltage is DC100V, Vmax can be set to 75V×0.9=67.5V or more.

On the other hand, as shown in FIG. 16 , the closing command is input into the control logic unit 204 through the limit switch 42 as an interlock mechanism and the relay contact 222 linked with the relay 214 , and at the same time, the opening command is also input. Furthermore, the auxiliary contacts 48 a and 48 b for opening and closing the contacts are connected to the control logic unit 204 according to the state of the vacuum circuit breaker 32 . The control logic unit 204 performs logical operations according to the close command, the open command, and the state of the vacuum circuit breaker 32, thereby outputting control signals for controlling the FET 208, the relay 214, and switching the relay contacts 210, 212 of the relay. The relay contact 222 constitutes a close command control mechanism for prohibiting the input of a close command before the charge end detection circuit 220 generates a charge end signal.

Next, the operation of the control logic unit 204 will be described with reference to FIG. 17 . When the closing action is performed according to the control signal generated by the control logic unit 204, in this embodiment, the closing command is accepted to generate the control signal only when the two conditions of the interlock mechanism being turned on and the capacitor charging is completed are met.

That is to say, when the closing command is generated, the interlock mechanism becomes connected and the relay contact 222 becomes disconnected as a condition, and the relay contacts 210 and 212 of the switching relay are switched to the a contact side, as a contact for the electromagnetic coil 48. The energization circuit forms a circuit for performing a closing operation, and then, the FET 208 is turned on to excite the electromagnetic coil 48 . Thus, the movable iron core 58 and the fixed iron core 60 are in contact with each other, thereby realizing the closing action of the relay 32 . In this process, the auxiliary contact 48b indicating the open state of the circuit breaker 32 is switched from on to off, and thereafter, after the movable contact of the circuit breaker 32 contacts the fixed contact, the auxiliary contact 48b representing the closed state of the circuit breaker 32 48a becomes ON.

After the closing operation of the circuit breaker 32 is completed, the FET 208 is turned off at an appropriate timing. After the FET 208 is turned off, the energy stored in the electromagnetic coil 48 is consumed by the resistor RL. After the coil current is sufficiently attenuated, the relay contacts 210 and 212 of the switching relay are opened to complete the closing action.

On the other hand, no special restrictions are set during the disconnection operation. As shown in FIG. 18, once the FET 208 is turned on after the disconnection command is generated, since the relay contacts 210 and 212 are respectively located on the side of the b contact point, the coil 48 is controlled by During the closing action, the current in the opposite direction is excited, so that the movable iron core 58 and the fixed iron core 60 are separated to realize the opening action of the circuit breaker 32 . During the opening operation, after the auxiliary contact 48a indicating the closed state of the circuit breaker 32 is turned from ON to OFF, the auxiliary contact 48b indicating the OFF state of the circuit breaker 32 is changed from OFF to ON. .

According to this embodiment, since the relay contacts 210, 212 are used to switch the energized circuit, and the FET208 is used to turn on and off the energized circuit, the relay contacts 210, 212 can be formed with a small capacity, and the FET208 can be formed with a large capacity. Therefore, low cost and miniaturization can be realized.

In addition, by executing the sequence of actions specified by the control logic unit 204, the priority function of disconnection and the function of preventing suction can be realized.

Next, another embodiment will be described based on FIG. 19 . In this embodiment, instead of the relay contacts 210 and 212 of the switching relay, the relay contacts 224-230 of the switching relay operating according to the control signal sent by the control logic unit 204 are provided, and other structures are the same as those in FIG. 10 .

The structure of the relay contact 224 is that, under normal conditions (when disconnected), the contact is in an open state and connected to the positive end of the capacitor 16, and only when the closing command is responded to, the contact is closed to become a connected state, and through the relay contact 228 It is connected to one end of the coil 48 . The structure of the relay contact 226 is that the contact is in a closed state and connected to the positive end of the capacitor 16 when it is open, and the contact is opened to be in an on state only in response to a closing command. The structure of the relay contacts 228, 230 makes it only in the ON state when responding to the OFF command, the relay contact 228 is connected to one end of the coil 48 when it is OFF, and is connected to one end of the coil 48 and the FET 208 when it is ON, thereby forming An energized circuit for the breaking action. The relay contact is connected to the other end of the coil 48 and the resistor RL when it is turned off, and is connected to the other end of the coil 48 and the positive end of the capacitor 16 when it is turned on, thereby forming an energizing circuit for the opening operation.

That is to say, when the closing command is generated, the relay contacts 228, 230 are in the disconnected state, the relay contacts 224, 226 are turned on, and the relay contacts 224, 228, 230 form an energizing circuit to the electromagnetic coil 48, thereby forming a circuit. The closing mechanism of the energized circuit that is used for closing action, on the other hand, when generating the opening command, when the relay contacts 224,226 become disconnected, the relay contacts 228,230 become connected, and the relay contacts 226, 226 become disconnected. 228 and 230 are connected to an energizing circuit for opening the circuit breaker, thereby constituting an opening mechanism for opening the circuit breaker 32 .

According to this embodiment, since the relay contacts 224-230 are used to switch the energized circuit, and the FET208 is used to turn the energized circuit on and off, the relay contacts 224-230 can be configured with a small capacity, and the FET208 can be configured with a large capacity, thereby Miniaturization and cost reduction can be realized.

In this embodiment, when the closing command is generated, the relay contacts 224 and 226 are turned on as a condition, so that the FET 208 is turned on, the electromagnetic coil 48 is excited, and the circuit breaker 32 is closed; When the relay contacts 228-230 are turned on, the FET208 is turned on, the electromagnetic coil 48 is excited, and the circuit breaker 32 is turned off; therefore, when the relay contacts 224-230 are in the off state, the voltage The drive type FET 208 can prevent the vacuum circuit breaker 32 from malfunctioning even when it malfunctions due to ripple noise or the like.

In the case of combining the electromagnetic operation device of the above-mentioned embodiment and the magnetic latch type electromagnetic operation type vacuum circuit breaker 32 to form an electromagnetic operation type switchgear, it is possible to use a microcomputer, a logic IC (CPLD/FPGA) or a mechanical relay to form a control device. logic part 204 . The current required by the closing command and the opening command is about tens of milliamperes, which can constitute a small energy switching device.

In other words, digital relays have become mainstream in recent years as relays that issue an opening command to a circuit breaker, and are suitable for operating a circuit breaker capable of operating with a small current. However, as relays that issue disconnection commands to circuit breakers, there are also a large number of old-type analog relays. When the electromagnetically operated switchgear of the present invention is used in a switchboard equipped with analog relays, the current value of the disconnection command This aspect creates a mismatch problem.

For example, as shown in Figure 20 (a), (b), when the current exceeding the specified value flows through the current transformer 203 of the current of the detection circuit breaker 300 (corresponding to the circuit breaker of the circuit breaker 32), the closing and disc 304 to connect the main contact 306 to activate the auxiliary contactor 308 . At this time, the auxiliary contactor 308 outputs an opening command (tripping command) to the circuit breaker 300 , and at the same time, the display 310 operates. That is, in the opening command, not only the circuit breaker 300 is activated, but also a current capable of operating the display 310 is required, and its value is 2-5A. Therefore, when constituting the electromagnetically operated switchgear, it is necessary to make the dummy relay/breaker 300 operate normally together.

Therefore, in this embodiment, when constituting the electromagnetically operated switchgear, as shown in FIG. 21, a part of the opening command is bypassed to the cathode (ground) of the AC/DC converter 200 as the power supply through the resistor 312. A bypass circuit on one side (control power supply N), in which an auxiliary contact 314 that responds to the opening action of the vacuum circuit breaker 32 to disconnect the bypass circuit and a jumper switch 313 that responds to the operation switch contact, are connected, And the resistor 312 is mounted on the control circuit board 18 .

If the above-mentioned structure is adopted, the input impedance of the control logic part 204 is increased. When the structure of the control logic part 204 is such that a current of about tens of milliamps flows, and when an analog relay is used as a relay, the jumper switch is closed and the side is closed. circuit, which can bypass the disconnection command of several amperes outputted by the analog relay through the resistor 312 and the auxiliary contact 314.

The resistor 312 can be set according to the rated control voltage, for example, it can be set to about 30 ohms when the input is DC100V. At this time, the current of the disconnection command transmitted by the analog relay becomes about 3A, so that the display 310 and the circuit breaker 300 can be operated together, and the auxiliary contact 310 can be disconnected synchronously with the circuit breaker 300, and even when using Compatibility is also ensured with conventional relays.

According to this embodiment, even if a digital relay and an analog relay are used as the relay, the relay and the circuit breaker can be operated together in a stable state.

In the above-mentioned embodiment, although the implementation of the resistor 312 on the control circuit board 18 has been described, the resistance 312 does not necessarily have to be installed in the control circuit board 18, for example, as shown in Figure 22 and Figure 23, only in When using an analog relay, it is also possible to adopt a structure in which the resistor 312 is housed in a relay box 316. The relay box 316 is installed on the front cover (front panel) 166 and is used to relay the signal from the secondary pin 22 and It is transmitted to the control wiring board 18 and the like.

If the above structure is adopted, as the electromagnetically operated switchgear, when the relay is a digital relay, it can be used as it is, and when the relay is an analog relay, it can be adapted to it by installing a relay box 316. Any kind of relay can be used universally.

In addition, the relay box 316 does not have to be directly mounted on the switchgear, and can be mounted anywhere as long as it is between the analog relay and the switchgear.

In the above-mentioned embodiment, although the single-phase circuit breaker 32 has been described, three-phase circuit breakers can be provided as the circuit breaker 32, and the circuit breakers of each phase can be connected by the shaft 98, so that one electromagnet 14 can be used to control each phase. The circuit breaker realizes opening and closing action.

In addition, the circuit breaker 32 may be operated by connecting a plurality of electromagnets 14 via the shaft 98 and connecting the coils 48 of the respective electromagnets 14 in series.

The specific structure of the electromagnet 14 will be described in detail below using FIGS. 24-29 . Fig. 24 is the longitudinal sectional view of electromagnet 14; Fig. 25 is the cross-sectional view along the A-A line of Fig. 24; Fig. 26 is the cross-sectional view along the B-B line of Fig. 24; Fig. 27 is the cross-sectional view along the C-C line of Fig. 24 Sectional view.

In Fig. 24-Fig. 27, the structure of electromagnet 14 has: make cylindrical coil 48, make cylindrical movable iron core 58, make cylindrical fixed iron core 60, insert movable iron core 58 and fix The shaft 62 of the axial center portion of the iron core 60, the movable flat plate 64,64 of the oblong shape fixed on the shaft 62, the permanent magnet 68 made of the oblong shape and fixed on the support plate 74, made of the oblong shape as the side yoke The iron cover plates 70 and 72 are fixed on the fixing rod 78 and support the support plate 76 supporting the iron cover plate 72 .

Here, when constituting the iron cover plates 70 and 72 surrounding the shaft 62 and the coil 48, steel pipes with a circular cross-section are used as steel pipes of standard sizes stipulated in JIS and other standards, and a part of the steel pipes is pressed by pressing. Flattened steel pipe.

For example, as shown in Fig. 28(a), a part of a circular steel pipe is flattened along its diameter by pressing, and then, as shown in Fig. 28(b), by pressing the steel pipe in the axial direction, the The end faces of the plates 70, 72 through which the magnetic field passes are smoothed.

In addition, when the steel pipe is flattened so that the short diameter H reaches 2/3 of the outer diameter D of the steel pipe as described in the flat test specified in JIS G 3454, etc., it should be inspected for damage or cracks. That is, it simply means that even if the steel pipe is flattened to this size, there is no problem with its performance.

Therefore, in this embodiment, even in the iron cover plates 70 and 72, it is desirable to set the minor diameter dimension to 2/3 or more of the original outer diameter of the steel pipe.

In addition, with respect to permanent magnet 68 and movable hand plate 62,64, owing to coincide with the shape of iron cover plate 70,72, and its profile is made oblong shape, with permanent magnet 68, movable flat plate 62,64 is made circle Compared with the shape, the relative area between the two can also be increased, thereby enhancing the attractiveness.

In addition, since the movable flat plates 62, 64 are made of thin steel plates by stamping, and the permanent magnet 68 is made by sintering with a mold, both of them will not increase the cost by making them oblong.

On the other hand, as for the movable iron core 58 and the fixed iron core 60, since they are made of steel rods of standard sizes stipulated by the JIS standard, by making the movable iron core 58 and the fixed iron core 60 into a cylindrical shape, the It can also reduce the cost compared with when it is square or rectangular.

When assembling the electromagnet 14 of the above-mentioned structure, as shown in FIG. In this state, the iron cover plate 72 is first placed on the support plate 72 from above, and then the coil 48, the support plate 74 on which the permanent magnet 68 has been fixed with an adhesive, and the movable iron core are sequentially mounted. 58, movable flat plate 66, movable flat plate 64, then use nut fixed axle 62 and movable iron core 58, movable flat plate 64,66 respectively then. Thereafter, the iron cover plate 70 and the flat plate 56 are mounted on the support plate 74, and the nut 55 is fixed on the fixing rod 78 to complete the assembly of the electromagnet 14.

When disposing the assembled electromagnet 14 on the front side of the vacuum circuit breaker 32, the arrangement of the short diameter side of the oblong iron cover plates 70, 72 is consistent with the depth direction of the casing 10 and the vacuum circuit breaker 32.

According to the present embodiment, since the short diameter of the oblong iron cover plates 70, 72 is arranged in line with the depth direction of the vacuum circuit breaker 32 and the casing 10, the electromagnet 14 can be arranged so that the depth dimension can be made smaller than the width dimension. The installation space of the electromagnet 14 is narrow, and the installation space of the electromagnetic operation device can be reduced, and the size of the switchgear (circuit breaker 32 ) equipped with the electromagnetic operation device and the switchboard with the switchgear can be reduced.

In addition, according to this embodiment, because only the iron cover plates 70, 72 that can be pressed and formed, the movable flat plates 64, 66 that can be pressed and formed, and the permanent magnet 68 formed by the mold are made into an oblong shape, the cost can not be increased and the size can be reduced. Electromagnetic operating device. Furthermore, by making the iron cover plates 70, 72 of the electromagnet 14 into an oblong shape, especially a racetrack shape, useless space can be reduced and the efficiency of occupied area can be improved.

As described above, according to the electromagnetic operating device of the present invention, the arrangement structure can improve workability. The man-hour required for production is reduced, and the electromagnet whose depth dimension is smaller than the width dimension can be formed, and the installation space can be reduced at the same time. Furthermore, according to the electromagnet control device of the present invention, it is possible to reduce the size of the control device for controlling the direction of energization to the electromagnet coil based on the opening command and the closing command. Furthermore, the electromagnetically operated switch device of the present invention can be applied to both digital relays and analog relays.

Claims (33)

1. electromagnetic operating device, it is characterized in that, have: electromagnet, the movable core that this electromagnet has a relative configuration and secured core and the coil that makes above-mentioned movable core and secured core leave mutually or contact according to electromagnetic force, storage is used for the capacitor to the electric energy of above-mentioned coil magnetization, supply with the control circuit board of the energising direction of above-mentioned coil current according to close command or open command control by above-mentioned capacitor to switching device, and will be connected with above-mentioned movable core by linkage, the actuating force that the electromagnetic force that produces with above-mentioned electromagnet produces passes to the axle of above-mentioned switching device; With above-mentioned electromagnet is the center, disposes above-mentioned capacitor and above-mentioned control circuit board respectively independently.

2. electromagnetic operating device, it is characterized in that, have: electromagnet, the movable core that this electromagnet has a relative configuration and secured core and the coil that makes above-mentioned movable core and secured core leave mutually or contact according to electromagnetic force, storage is used for the capacitor to the electric energy of above-mentioned coil magnetization, according to the energising direction of above-mentioned coil current is supplied with in the close command or the open command control of switching device by above-mentioned capacitor control circuit board, to be connected with above-mentioned movable core by linkage, the actuating force that the electromagnetic force that produces with above-mentioned electromagnet produces passes to the axle of above-mentioned switching device, and the shell that above-mentioned electromagnet and capacitor and control circuit board are housed; Above-mentioned electromagnet is fixed on the middle position of above-mentioned outer casing bottom, above-mentioned capacitor and above-mentioned control circuit board are fixed on the above-mentioned shell respectively independently.

3. electromagnetic operating device according to claim 2 is characterized in that: above-mentioned shell has opening in a positive side, and the front cover plate is fixed on front one side of above-mentioned shell dismantledly.

4. electromagnetic operating device according to claim 2 is characterized in that: have the state detection mechanism of state that is used to detect above-mentioned switching device with the axle interlock that is connected with above-mentioned movable core, above-mentioned state detection mechanism and above-mentioned electromagnet formation one.

5. electromagnetic operating device according to claim 4, it is characterized in that: above-mentioned state detection mechanism has: with the axle interlock that is connected with above-mentioned movable core and carry out the contact of switch, with the axle interlock that is connected with above-mentioned movable core, show that above-mentioned switching device is in and cut off or the display panel of access state, the counter that links with the axle that is connected with above-mentioned movable core, the switch motion number of times of above-mentioned switching device is counted; Above-mentioned auxiliary contact and display panel and counter constitute one and are configured in the top of above-mentioned electromagnet.

6. electromagnetic operating device according to claim 2, it is characterized in that: also have cut-out spring, this cut-out spring is configured in bottom one side of above-mentioned electromagnet, is used for the axle that connects with above-mentioned movable core is applied the elastic force that makes above-mentioned movable core leave said fixing iron core direction.

7. electromagnetic operating device according to claim 2 is characterized in that: but also have the lifting action of the blocking lever of free lifting ground configuration and the above-mentioned blocking lever of response and carry out the interlocking switch of switch; When above-mentioned blocking lever vertical motion, above-mentioned interlocking switch forcibly disconnects above-mentioned control circuit board input close command.

8. electromagnetic operating device according to claim 7 is characterized in that: also have be fixed on the above-mentioned blocking lever, with the lock pin of above-mentioned blocking lever one lifting be configured in the lifting zone of above-mentioned lock pin, be fixed on the latch on the aforementioned link mechanism; When above-mentioned switching device was in access state, the vertical motion of above-mentioned blocking lever was prevented from owing to above-mentioned lock pin and contacting of above-mentioned latch.

9. electromagnetic operating device according to claim 8 is characterized in that: also have the bottom that is configured in above-mentioned shell, the base that surrounds above-mentioned latch and be connected with above-mentioned shell; On above-mentioned base, in the zone of leaving the front cover plate and face to have in the zone of above-mentioned latch and can insert the groove of opening operation with handle; And in zone on the above-mentioned base, at above-mentioned front cover plate and the zone that faces above-mentioned latch have the groove that can insert closed procedure usefulness handle.

10. electromagnetic operating device according to claim 2, it is characterized in that: in structure member, the slipper and the quadrate part spare that slide mutually at a quadrate part spare and the opposing party's parts rotate bearing portions or the rotating part use solid lubricant that supports the opposing party's parts freely.

11. electromagnet control device, it is characterized in that: supply with the power-on circuit of solenoid as the electric energy of the capacitor that will be stored, have the release mechanism that when open command takes place, is formed for making the power-on circuit that movable core and secured core leave mutually from the electric energy of power supply; As the power-on circuit opposite to the energising direction of above-mentioned solenoid, has the close mechanism that when close command takes place, is formed for making the power-on circuit that above-mentioned movable core and secured core be in contact with one another with the power-on circuit of above-mentioned release mechanism; The structure of above-mentioned release mechanism comprises the above-mentioned open command of response and inserts the transfer relay that is used for making the power-on circuit that above-mentioned movable core and secured core leave mutually; The structure of above-mentioned close mechanism comprises the above-mentioned close command of response and inserts the transfer relay that is used for making the power-on circuit that above-mentioned movable core and secured core be in contact with one another.

12. electromagnet control device according to claim 11 is characterized in that: above-mentioned each transfer relay has a contact and b contact, and the c contact is shared contact, and the b contact in above-mentioned each transfer relay inserts in the power-on circuit of release mechanism.

13. electromagnet control device according to claim 11 is characterized in that: have master control mechanism, this master control mechanism inserts in the power-on circuit of the power-on circuit of above-mentioned close mechanism or above-mentioned release mechanism; When above-mentioned close command takes place, be condition with the power-on circuit that forms above-mentioned close mechanism, the power-on circuit of closed above-mentioned close mechanism then disconnects the power-on circuit of above-mentioned close mechanism in addition; When above-mentioned open command took place, the power-on circuit of closed above-mentioned release mechanism then then disconnected the power-on circuit of above-mentioned release mechanism in addition.

14. electromagnet control device, it is characterized in that: supply with the power-on circuit of solenoid as the electric energy of the capacitor that will be stored, have the release mechanism that when open command takes place, is formed for making the disconnection usefulness power-on circuit that movable core and secured core leave mutually from the electric energy of power supply; As the power-on circuit opposite to the energising direction of above-mentioned solenoid, have and when close command takes place, be formed for making closure that above-mentioned movable core and secured core be in contact with one another close mechanism with power-on circuit with the power-on circuit of above-mentioned release mechanism; The structure of above-mentioned release mechanism comprises the above-mentioned open command of response, inserts above-mentioned disconnection and inserts the closure transfer relay of above-mentioned disconnection with power-on circuit with transfer relay with before above-mentioned close command takes place with a pair of disconnection in the power-on circuit; The structure of above-mentioned close mechanism comprises the above-mentioned close command of response, inserts above-mentioned closure and inserts above-mentioned closed with a pair of disconnection transfer relay in the power-on circuit with the closure in the power-on circuit with transfer relay with before above-mentioned open command takes place.

15. electromagnet control device according to claim 14, it is characterized in that: have master control mechanism, this master control mechanism inserts in the power-on circuit of the power-on circuit of above-mentioned close mechanism or above-mentioned release mechanism, when above-mentioned close command takes place, is condition to form above-mentioned closure with power-on circuit, closed above-mentioned closure power-on circuit disconnects above-mentioned closure power-on circuit in the time of in addition; When above-mentioned open command takes place, be the closed above-mentioned closure power-on circuit of condition to form above-mentioned disconnection power-on circuit, disconnect above-mentioned disconnection power-on circuit in the time of in addition.

16. according to claim 13 or 15 described electromagnet control devices, it is characterized in that: between above-mentioned transfer relay and above-mentioned master control mechanism, insert the two ends that are connected above-mentioned solenoid energy consumption element by above-mentioned transfer relay with the energy that consumes solenoid.

17. electromagnet control device according to claim 16 is characterized in that: above-mentioned energy consumption element is made of resistance that is connected in series and diode.

18. according to any described electromagnet control device among the claim 11-14, it is characterized in that also having: the two ends that are connected above-mentioned capacitor are used for making the charging voltage of above-mentioned capacitor to maintain the voltage stabilizing didoe of setting; The a plurality of charging resistors that be connected in series between above-mentioned power supply and the above-mentioned capacitor, its resistance value are different; Be reached for the charging end detection circuit of output charging end signal when driving the enough voltage of above-mentioned electromagnet in the charging voltage of above-mentioned capacitor; Before the above-mentioned charging end signal of output with above-mentioned a plurality of charging resistors in the little charging resistor of resistance value insert in the circuit that connects above-mentioned power supply and above-mentioned capacitor, and when above-mentioned charging end signal output with above-mentioned a plurality of charging resistors in charging resistor switching mechanism in the circuit of the big charging resistor access above-mentioned power supply of connection of resistance value and above-mentioned capacitor.

19. electromagnet control device according to claim 18 is characterized in that: also have the close command controlling organization, be used for before the charging end signal produces, forbidding to above-mentioned close mechanism input close command.

20. electromagnet control device according to claim 18 is characterized in that: in above-mentioned charging end detection circuit, the voltage range as the above-mentioned charging end signal of output is provided with hysteresis higher limit and hysteresis lower limit; After the charging voltage of above-mentioned capacitor reaches above-mentioned hysteresis higher limit, reach below the above-mentioned hysteresis lower limit up to the charging voltage of above-mentioned capacitor, above-mentioned charging end detection circuit is all exported above-mentioned charging end signal.

21. electromagnet control device according to claim 20, it is characterized in that: the hysteresis lower limit of above-mentioned charging end detection circuit is after the charging voltage of above-mentioned capacitor has just reached more than the above-mentioned hysteresis higher limit, even disconnect action, the residual voltage of above-mentioned capacitor is set at the value of lower limit that is not less than as the voltage of the condition of the above-mentioned charging end signal of output.

22. according to any described electromagnet control device among the claim 11-14, it is characterized in that: the charging voltage maximum of above-mentioned capacitor is set at more than 90% of minimum voltage as the control regulation of line voltage of the prescribed by standard of the switching device of the operand of above-mentioned solenoid.

23. a solenoid-operated switching device is characterized in that having: the switching device that makes the fixed contact of relative configuration leave or contact according to actuating force with movable contact; The electromagnet that is connected with above-mentioned switching device by linkage; Response is to the close command or the open command of above-mentioned switching device, and the control circuit board of energising direction of the electric current of above-mentioned magnet spool is supplied with in control from capacitor; Make the bypass circuit of the part of above-mentioned open command to the electrical power by-pass of above-mentioned control circuit board by resistance.

24. a solenoid-operated switching device is characterized in that having: the switching device that the fixed contact that makes relative configuration according to actuating force and movable contact leave mutually or contact; Movable core with relative configuration and secured core and the electromagnet that makes the coil that above-mentioned movable core leaves or contact with secured core according to electromagnetic force; Accept and store the capacitor of the electric energy of supplying with by power supply; Response is to the close command or the open command of above-mentioned switching device, and control is by the control circuit board of the energising direction of the electric current of above-mentioned capacitor supply electromagnet coil; The actuating force that connects, will produce with the electromagnetic force that above-mentioned electromagnet produces by linkage with above-mentioned movable core pass to the axle of above-mentioned switching device and by resistance with the part of above-mentioned open command bypass circuit to above-mentioned electrical power by-pass.

25. solenoid-operated switching device according to claim 23 is characterized in that: in above-mentioned bypass circuit, for the disconnection action that responds above-mentioned switching device inserts the auxiliary contact that disconnects above-mentioned bypass circuit.

26. solenoid-operated switching device according to claim 23, it is characterized in that: in above-mentioned bypass circuit, for responding the disconnection action of above-mentioned switching device, series connection inserts the auxiliary contact of the above-mentioned bypass circuit of disconnection and the jumper switch of operation response make and break contact.

27. solenoid-operated switching device according to claim 23 is characterized in that: the resistance configuration of above-mentioned bypass circuit is on above-mentioned control circuit board.

28. solenoid-operated switching device according to claim 23 is characterized in that: also have the above-mentioned open command of relaying and be sent to the relaying box of above-mentioned control circuit board, the resistance configuration of above-mentioned bypass circuit is in above-mentioned relaying box.

29. solenoid-operated switching device according to claim 23, it is characterized in that: also have the above-mentioned open command of relaying and be sent to the relaying box of above-mentioned control circuit board, above-mentioned relaying box is configured in above-mentioned open command is outputed between the relay and above-mentioned control circuit board of above-mentioned relaying box, and above-mentioned bypass resistance is configured in the above-mentioned relaying box.

30. electromagnetic operating device, it is characterized in that, have: electromagnet and axle, this electromagnet has the movable core and the secured core of relative configuration, the coil that makes above-mentioned movable core and secured core leave mutually or contact according to electromagnetic force, and as return yoke cover above-mentioned coil around the time, form the iron cover plate in the path of the magnetic flux that produces by above-mentioned iron core; This connects with above-mentioned movable core and the actuating force that will produce with the electromagnetic force that above-mentioned electromagnet produces by linkage passes to switching device; Above-mentioned iron cover plate is that the tubular article of oblong shape constitutes by profile, and the configuration on one side of the minor axis of above-mentioned tubular article is consistent with the depth direction of above-mentioned switching device.

31. electromagnetic operating device, it is characterized in that, have electromagnet and axle, this electromagnet has: the columniform movable core and the secured core of relative configuration, the coil that makes above-mentioned movable core leave or contact according to electromagnetic force with secured core, in the path that forms the magnetic field that produces by above-mentioned iron core, produce the permanent magnet of the electromagnetic force of the contact condition that is used to keep above-mentioned movable core and secured core, be fixed on the above-mentioned movable core and the treadmill of relative configuration with above-mentioned permanent magnet and as return yoke cover above-mentioned coil around the time, form the iron cover plate in the path in the magnetic field that produces by above-mentioned coil; This connects with above-mentioned movable core and the actuating force that will produce with the electromagnetic force that above-mentioned electromagnet produces by linkage passes to switching device; The profile of above-mentioned permanent magnet and above-mentioned treadmill is made Long Circle, the configuration on one side of each minor axis is consistent with the depth direction of above-mentioned switching device, above-mentioned iron cover plate is that the tubular article of oblong shape constitutes by profile, and the configuration on one side of the minor axis of above-mentioned tubular article is consistent with the depth direction of above-mentioned switching device.

32. electromagnetic operating device according to claim 30 is characterized in that: as above-mentioned iron cover plate use the part of round steel pipe is flattened, its profile is made oblong tubular article.

33. electromagnetic operating device according to claim 32 is characterized in that: the external diameter of the minor axis direction of above-mentioned iron cover plate is more than 2/3 of the original external diameter of steel pipe.

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