JP2007014087A - Vacuum insulated switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum insulated switchgear that is small, light and highly reliable, which can flexibly meet various demands of users.
SOLUTION: A casing 1 having a low voltage control section 2, a high voltage switch section 3, a busbar, and a cable section 4 partitioned by a ground metal plate, and the high voltage switch section 3 of the casing 1 are provided. And a vacuum two-point three-position type switch 8 and its operation device 11 having a breaking and disconnecting function, and the bus 5 of the housing 1 and the bus 5 provided in the cable partition 4 and / or the cable 6. It is characterized by.
[Selection] Figure 1

Description

    The present invention relates to a vacuum insulated switchgear that is reduced in size and weight and has high performance and reliability.

  In power receiving equipment, vacuum circuit breakers to cut off load currents or accident currents, disconnectors and grounding switches to ensure the safety of workers when performing load maintenance inspections, system voltage / current detection devices In addition, a closed type switchboard (referred to as switchgear) in which protective relays and the like are housed is installed.

  There are various types of insulation for this switchgear. In addition to the conventional air insulation board and cubic GIS using SF6 gas, these days, solid insulation, compressed air insulation, full vacuum insulation, etc. from an environmental standpoint. As the miniaturization of each component of the circuit breaker, disconnector, and ground switch accelerates due to various insulation methods, a vacuum valve that integrates the functions of disconnection, disconnection, and grounding in a single container, The thing (aggregation type switchgear) accommodated in the insulated gas container is proposed (for example, refer patent document 1).

JP 9-153320 A

  The above-mentioned centralized switchgear is a vacuum valve that integrates the functions of shut-off, disconnection, and grounding in a single container, and is housed in an insulating gas container. It can respond to the needs of computerization.

  On the other hand, in recent power receiving and transforming facilities, the demands of users are diversified. That is, for example, because the types of loads and operating conditions differ depending on the purpose of use, the distribution system is planned in consideration of the required safety, reliability, operational maintenance and future loads. However, in this distribution plan, consideration must also be given to the control of the circuit breakers, disconnectors, grounding switches, etc. that make up the power receiving / transforming equipment and the monitoring and measurement of voltage, current, power, etc.

  In this case, one question is how to reduce the installation space for the equipment, such as the control and monitoring and measurement of the equipment, and reduce the investment for the installation. At present, there is no equipment.

  The present invention has been made based on the above-described matters, and an object of the present invention is to provide a vacuum insulated switchgear that is small, light, and highly reliable, capable of flexibly responding to various requests of users.

  In order to achieve the above object, the first invention provides a casing having a low voltage control section section, a high voltage switch section section, a bus bar, and a cable section section defined by a ground metal plate, and a high voltage of the casing. A vacuum two-point cut three-position type switch having an interrupting disconnection function provided in the switch section and its operating device, and a busbar of the housing, a busbar provided in the cable section, or a cable. Features.

  According to a second aspect of the present invention, there is provided a casing having a low voltage control partition section, a high voltage switch partition section, a bus bar, and a cable partition section, which are partitioned in order from the vertical direction by a ground metal plate, and the high voltage switch section of the casing. A vacuum two-point cut three-position type switch having an interrupting disconnection function provided in the section and its operating device, connected to one fixed contact of the switch, the bus arranged in the cable section, and the cable, It is connected to the other fixed contact of the switch, and includes the bus bar, a bus bar arranged in the cable partition part, and a vacuum ground switch connected to the cable side and arranged in the high voltage switch compartment part. .

  Furthermore, the third invention is a housing having a low voltage control partition section, a high voltage switch partition section, a bus bar, and a cable partition section, which are partitioned in order from the vertical direction by a ground metal plate, and a high voltage switch section of the casing. A vacuum two-point cut and three-position type switch having an interrupting disconnection function provided in a section and its operating device, and one fixed contact and the other fixed contact of the switch; And a vacuum grounding switch connected to each of the buses and the fixed contacts and arranged in the high-voltage switch compartment.

  According to a fourth aspect of the present invention, there is provided a housing having a low voltage control partition section, a high voltage switch partition section, a busbar, and a cable partition section, which are partitioned in order from the vertical direction by a ground metal plate, and the high voltage switch section of the casing. A two-point vacuum type switch having a disconnect function provided in a section and its operating device, a line side connected to one fixed contact of the switch and disposed in the busbar, cable partition, and the switch And connected between the other fixed contact of the switch and the instrument transformer disposed in the busbar and cable section, and between the other fixed contact of the switch and the instrument transformer, in the high-voltage switch section And a vacuum grounding switch arranged in the above.

  Further, the fifth invention is a housing having a low voltage control partition section, a high voltage switch partition section, a bus bar, and a cable partition section, which are partitioned in order from the vertical direction by a ground metal plate, and a high voltage switch section of the casing. A two-point vacuum type switch having a disconnect function provided in a section, a bus connected to one fixed contact of the switch, the bus disposed in the cable partition, and the other fixed contact of the switch Connected to the busbar, the instrument transformer disposed in the cable compartment, and the vacuum ground disposed in the high-voltage switch compartment, connected between the other fixed contact of the switch and the instrument transformer. And a switch.

  The sixth invention is characterized in that, in the second invention, further comprises a voltage detector connected to the line side of the vacuum grounding switch and disposed in the high-voltage switch compartment.

  Furthermore, a seventh invention is characterized in that, in the third invention, further comprises a voltage detector connected to the bus bar side of the vacuum grounding switch and disposed in the high-voltage switch compartment.

  According to the present invention, by providing and adopting a compact, lightweight and reliable switch of vacuum two-point cut and three-position type in which a circuit breaker and a disconnecting device are integrated, a user can It can respond flexibly to various requests. In addition, the lightweight and small size facilitates transportation and installation, and can also reduce the floor installation load.

Hereinafter, an embodiment of a vacuum insulated switchgear according to the present invention will be described with reference to the drawings.
1 is a side view showing an embodiment in which a vacuum insulated switchgear according to the present invention is applied as a feeder board, FIG. 2 is a front view of FIG. 1, and FIG. 3 is a perspective view of FIG. In these drawings, a vacuum insulation switchgear housing 1 includes a low pressure control compartment 2, a high voltage switch compartment 3, a busbar, and a cable compartment 4 each of which is partitioned by a ground metal plate from above. .

  Inside the bus / cable partition 4, a solid-insulated bus 5, a cable head 6 on the line side, a bushing CT 7, and the like are arranged. In addition, in the high-pressure switch compartment 3, a vacuum 2-point 3-position type switch (vacuum 2-point 3-position type breaker BDS) 8, a ground switch (ES) 9 with a vacuum input container, voltage A detector (VD) 10 and an operation device 11 are arranged.

  The bus 5 is gas-less by solid insulation, and the handling property and safety are ensured. Further, the voltage detector 10 detects corona generated due to deterioration of the degree of vacuum in the vacuum vessel, and improves maintenance and inspection.

  FIG. 4 shows an electric circuit of an embodiment in which the above-described vacuum insulated switchgear of the present invention is applied as a feeder board.

  Next, a vacuum double-break three-position type switch (BDS) 8, a ground switch (ES) 9 with a vacuum input container, and a voltage detector (VD) 10 disposed in the high-voltage switch partition 3 described above. Are integrally molded with an epoxy resin 12 as shown in FIG. As a result, the switch part is unitized to reduce the size and weight. This unitized switch part has a phase separation structure, and further, a shielding layer is disposed between the phases so that occurrence of a short circuit accident between the phases is suppressed. The outer surface of the above-mentioned mold is grounded by the applied conductive paint, and the safety of contact is ensured.

  The detailed configuration of the unitized switch unit described above will be further described with reference to FIGS. 1 and 5. A vacuum two-point three-position type switch (BDS) 8 includes a vacuum vessel 80 including an insulating cylinder, The two fixed contacts 81 housed in the vacuum container 80 and the movable contacts 82 are provided to form a two-point cut.

  One fixed contact 81 on the left side of FIG. 1 is connected to the bus 5 via a feeder 83. In addition, one fixed contact 82 on the right side in FIG. 1 is connected to the cable head 6 via a feeder 84.

  One movable contact 82 and the other movable contact 82 are connected by a movable conductor 85 reinforced with a metal that is not annealed at a high temperature such as stainless steel. A vacuum insulating operation rod 86 is connected to the movable conductor 85. The vacuum insulating operation rod 86 is led out of the vacuum vessel 80 through a metal bellows 87 and is connected to an air insulating operation rod 88. This air-insulated operating rod 88 is connected to an operating rod 111 operated by the operating device 11.

  As shown in FIG. 5, the one movable contact 82 and the other movable contact 82 are in a closed position Y1 for energization as shown in FIG. 5, an open position Y2 for interrupting current, and a surge voltage such as lightning. It stops at the 3 position of disconnection position Y3 for ensuring the safety of the inspection operator.

  As shown in FIG. 5, the two movable contacts 82 described above secure a breaking gap g2 at the open position Y2 and a breaking gap g3 at the breaking position Y3. This disconnection gap g3 is set to have an inter-pole distance that is substantially double the interruption gap g2. In this way, the disconnection gap g3 at the time of disconnection is set to be approximately twice the cutoff gap g2, and a plurality (two in this example) is provided, thereby enabling multistage insulation.

  In addition, it is possible to obtain "correlation insulation> insulation between contacts at disconnection> insulation between contacts at disconnection> grounding by changing the number of contacts with the above-mentioned dimensions between the contacts by vacuum insulation between the phases with mold insulation. Insulation coordination between phases has been established by establishing a relationship of “insulation between switches”. As a result, at least one line ground fault is suppressed, and the spread of the accident can be suppressed as much as possible.

  Further, the air-insulating operating rod 88 described above is covered with a rubber or metal bellows 89 as shown in FIG. As a result, the air-insulating operating rod 88 is secured with insulation reliability for long-term use.

  Next, as shown in FIG. 1, the earthing switch (ES) 9 with a vacuum charging container includes a vacuum container 91 having an insulating cylinder, a fixed contact 92 fixed in the vacuum container 91 and connected to the feeder 84. The movable contact 93 is provided. A vacuum insulation operating rod 94 is connected to the movable contact 93. The vacuum insulation operating rod 94 is led out of the vacuum vessel 91 through a metal bellows 95 and connected to an insulation operation rod 112 for a ground switch. The above-described vacuum vessels 80 and 91 and the operating rod are made of stainless steel to improve the environmental resistance. Each movable contact 93 is connected by a conductor 96 as shown in FIG.

Next, three positions of a closed position Y1 for energizing the switch 8, an open position Y2 for interrupting current, and a disconnect position Y3 for ensuring the safety of an inspection worker against surge voltage such as lightning. A detailed configuration of the operating device 11 for switching to and operating the ground switch 9 will be described with reference to FIG.
The components of the operating device 11 are fixed to a support plate 113 provided in the high-voltage switch compartment 3. The operating device 11 is a first operating mechanism 200 for switching the movable contact 82 of the switch 8 between the closed position Y1 and the open position Y2, and the movable contact 82 of the switch 8 is disconnected from the open position Y2. A second operating mechanism 300 for switching to the position Y3 and a third operating mechanism 400 for operating the movable contact 93 of the ground switch 9 are included.

  First, the configuration of the first operation mechanism 200 will be described with reference to FIGS. 6 and 1. First, in FIG. 6, the first shaft 201 is rotatably supported by the support plate 113. As shown in FIG. 1, three levers 202 are fixed to the first shaft 201 in the axial direction of the first shaft 201. The distal end side of the lever 202 is connected to the operation rod 111. Further, as shown in FIGS. 6 and 1, a lever 203 is fixed to one side of the first shaft 201 in the direction opposite to the lever 202.

  A drive shaft 206 of an electromagnet 205 is connected to the lever 203 via a connecting member 204 as shown in FIG. A movable iron core 207 having a T-shaped cross section is fixed to the drive shaft 206. Around the movable iron core 207, a fixed iron core 208 fixed to the support plate 113 is disposed. Inside the fixed iron core 208, a coil 209 and an annular permanent magnet 210 are arranged. A trip spring receiver 211 is provided on the side of the drive shaft 206 opposite to the lever 203. A trip spring 212 is disposed between the trip spring receiver 211 and the fixed iron core 208.

  The electromagnet 205 is a contact pressure spring (not shown) provided on the trip spring 212 and the air insulation operating rod 88 by the attractive force between the coil 209 and the permanent magnet 210 in a state where the movable contact 82 is held at the closed position Y1. The holding power that opposes the accumulated power of In particular, the attraction force of the permanent magnet 210, a so-called magnetic latch system is configured.

  Next, the configuration of the second operating mechanism 300 for switching the movable contact 82 of the switch 8 between the open position Y2 and the disconnecting position Y3 will be described with reference to FIG. A lever 301 is fixed to an intermediate portion of the shaft 201 in the longitudinal direction. An interlock pin 302 is provided on the distal end side of the lever 301. A roller 303 is in contact with the pin 302. The roller 303 is rotatably provided at one end of the crank lever 304. The crank lever 304 is rotatably supported on the lower surface side of the support plate 113.

  A driving shaft 306 of an electromagnet 305 is connected to the other end of the crank lever 304. A movable iron core 307 is fixed to the drive shaft 306. A fixed iron core 308 fixed to the support plate 113 is disposed around the movable iron core 307. Inside the fixed iron core 308, two coils 309 and 310 are arranged in the vertical direction. A return spring 311 is disposed between the movable iron core 307 and the upper part of the fixed iron core 308.

  The electromagnet 305 moves the movable iron core 307 in the vertical direction by exciting the coils 309 and 310. By this operation, the crank lever 304 rotates. By the rotation of the crank lever 304, the contact position between the interlock pin 302 and the roller 303 is changed, and the rotation of the lever 203 around the first shaft 201 is prevented or can be rotated. Let me. As a result, the movable contact 82 of the switch 8 is prevented from moving from the open position Y2 to the disconnect position Y3 and maintained at the open position Y2, and can be moved from the open position Y2 to the disconnect position Y3. That is, this configuration is a first interlock mechanism between the open position Y2 and the disconnection position Y3 of the movable contact 82 of the switch 8.

  Next, the configuration of the third operating mechanism 400 that operates the movable contact 93 of the ground switch 9 will be described with reference to FIG. 6 in particular. The second shaft 401 is rotatably supported by the support plate 113. Has been. As shown in FIG. 1, three levers 402 are fixed to the first shaft 401 in the axial direction of the first shaft 401. The distal end side of the lever 402 is connected to the operation rod 112. Further, as shown in FIG. 6, a lever 403 is fixed on one side of the second shaft 401 in a direction opposite to the lever 402.

  As shown in FIG. 6, a drive shaft 406 of an electromagnet 405 is connected to the lever 403 via a connecting member 404. The electromagnet 405 has the same configuration as the electromagnet 205 of the first operation mechanism 200 described above, and a movable iron core 407 having a T-shaped cross section is fixed to the drive shaft 406. Around the movable iron core 407, a fixed iron core 408 fixed to the support plate 113 is disposed. Inside the fixed iron core 408, a coil 409 and an annular permanent magnet 410 are arranged. A blocking spring 411 is disposed between the fixed iron core 408 and the lower surface of the support plate 113.

  Between the third operation mechanism 400 of the ground switch 9 and the second operation mechanism 300 for switching the movable contact 82 of the switch 8 between the open position Y2 and the disconnect position Y3, the second An interlock mechanism is provided.

  When the movable contact 82 in the switch is in the three positions of the disconnecting position Y3 for ensuring the safety of the inspection operator against surge voltage such as lightning, the second interlock mechanism is opened and closed by the electromagnet 405. When the movable contact 93 in the switch 9 can be inserted into the fixed contact, and when the movable contact 82 in the switch is in the two positions of the open position Y2 for interrupting the current, the electromagnet 405 is used in the ground switch 9. When the movable contact 93 cannot be inserted into the fixed contact, and when the movable contact 93 is inserted into the fixed contact of the ground switch 9, the operation of the electromagnet 205 in the second operation mechanism 300 is disabled. To be associated.

  Specifically, the second interlock mechanism includes a pin 412 provided at the lower end of the drive shaft 406 of the electromagnet 405 in the third operation mechanism 400 and a lower side of the electromagnet 305 in the second operation mechanism 300. A shaft 413 provided in parallel with the second shaft 401, a lever (not shown) provided on the shaft 413 and connected to the lower end of the drive shaft 306 of the electromagnet 305 in the second operation mechanism 300, The lever 414 is provided and is engaged with the pin 412.

Next, the operation of an embodiment in which the above-described vacuum insulated switchgear of the present invention is applied as a feeder panel will be described with reference to FIGS.
In a state where the movable contact 82 in the switch 8 is set to the open position Y2 for interrupting the current, the lever 203 in the first operation mechanism 200 is moved by the return force of the trip spring 212 in the first operation mechanism 200. In FIG. 1, a clockwise rotational force is applied with the first shaft 201 as a fulcrum.

  As a result, the interlocking pin 302 provided on the distal end side of the lever 301 constituting the second operation mechanism 300 abuts on the outer peripheral upper surface of the roller 303, and further clockwise rotation by the return force of the trip spring 212 The movement is suppressed. That is, the transition from the open position Y2 for interrupting the current to the disconnect position Y3 for ensuring the safety of the inspection worker against a surge voltage such as lightning is prevented.

Next, an operation (closing operation) from the open position Y2 to the closed position Y1 by the first operation mechanism 200 will be described.
When the coil 209 of the electromagnet 205 of the first operating mechanism 200 is energized, the drive shaft 206 moves upward in FIG. As the drive shaft 206 moves upward, the lever 202 rotates counterclockwise in FIG. 1 with the first shaft 201 as a fulcrum, thereby moving the movable contact 82 in the closed position Y1 direction. In this closed state, the trip spring 212 and the contact pressure spring are stored to prepare for the opening operation.

  Note that the interlocking pin 302 is separated from the outer peripheral surface of the roller 303 by this closing operation. Further, the roller 303 is held at the initial position without causing a change in position by the return spring 311 in the second operation mechanism.

  As described above, when the switch 8 is in the closed state, the second operation mechanism 300 is mechanically required from the viewpoint of safety enhancement so that the disconnection operation by the first operation mechanism 200 is disabled. An interlock mechanism is configured. That is, one of the mechanical interlocks between the interruption and disconnection is realized that “when the movable contact is in the closed position, the disconnection operation is disabled”.

Next, an operation (opening operation) from the closed position Y1 to the open position Y2 by the first operating mechanism 200 will be described.
When the coil 209 of the electromagnet 205 in the first operating mechanism 200 is excited in the direction opposite to that in the closing operation and the magnetic flux of the permanent magnet 210 is canceled, the driving force is driven by the stored force of the trip spring 212 and the contact pressure spring. The shaft 206 moves downward in FIG. The downward movement of the drive shaft 206 causes the lever 301 to rotate clockwise in FIG. 1 via the lever 203 and the first shaft 201. The clockwise rotation of the lever 301 is the second rotation. This is suppressed by the contact between the interlock pin 302 and the outer peripheral upper surface of the roller 303 in the operation mechanism. As a result, the movable contact 82 of the switch 8 can be held at the open position Y2.

Next, an operation (disconnection operation) from the open position Y2 to the disconnection position Y3 by the second operation mechanism 300 will be described.
When the upper coil 309 of the electromagnet 305 in the second operating mechanism 300 is excited in the open state of the switch 8 described above, the drive shaft 306 moves upward against the return spring 311. This upward movement of the drive shaft 306 causes the roller 303 to rotate counterclockwise in FIG. 1 via the crank lever 304. By the counterclockwise rotation of the roller 303, the contact position between the roller 303 and the interlock pin 302 is lowered downward. As a result, the operating rod 111 moves upward via the lever 301, the first shaft 201, and the lever 202, and the movable contact 82 of the switch 8 moves to the disconnection position Y3.

  In this disconnected state, the movable iron core 207 of the electromagnet 205 in the first operating mechanism 200 is located below the permanent magnet base 210. Therefore, even if the coil 209 of the electromagnet 205 in the first operating mechanism 200 is excited in the disconnected state, there is almost no magnetic flux passing through the movable iron core 207 and no attractive force is generated. That is, a mechanical interlock between the circuit breaker and the disconnecting switch is realized “when the movable contact exists at the disconnecting position, the closing operation is disabled”.

Next, an operation from the disconnection position Y3 to the open position Y2 by the second operation mechanism 300 will be described. When the lower coil 310 of the electromagnet 205 in the second operating mechanism 300 is excited in the disconnected state, the drive shaft 206 moves upward and the crank lever 304 rotates clockwise.
Since the roller 303 pushes up the interlocking pin 302 in contact with the roller 303, the movable contact 82 of the switch 8 moves to the open position Y2.

  Next, when the movable contact 82 of the switch 8 is in the open position Y2 for cutting off the current, the lever 414 in the second interlock mechanism is below the drive shaft 406 of the electromagnet 405 in the third operation mechanism 400. Since it is engaged with the pin 412 provided at the end, the electromagnet 405 makes it impossible to insert the ground switch 9 into the movable contact 93.

  Further, when the movable contact 93 is inserted into the fixed contact of the ground switch 9, the lever 414 in the second interlock machine is engaged with the pin 412 provided at the lower end of the drive shaft 406 of the electromagnet 405. Therefore, the operation by the second operation mechanism 300 is impossible, and further, the movable contact 82 of the switch 8 is a disconnect position for ensuring the safety of the inspection operator against a surge voltage such as lightning. When in Y3, the lever 414 in the second interlock mechanism enables movement of the pin 412 provided at the lower end of the drive shaft 406 of the electromagnet 405, so that the ground switch 9 is operated by the third operation mechanism 400. Can be input.

  In the above-described embodiment, the rotatable roller 303 is used for the second operating mechanism 300. However, the roller 303 can be a partially arcuate cam. Further, the first operation mechanism 200 and the third operation mechanism 400 can be appropriately changed in arrangement. Furthermore, although the electromagnetic operation method is applied to the first operation mechanism 200, other operation methods such as an electric spring method may be employed.

  According to the embodiment of the present invention described above, the vacuum insulated switchgear can be reduced in size and weight, and its performance and reliability can be increased. In addition, the adoption of this small and lightweight vacuum insulated switchgear makes it possible to provide a feeder panel that meets user requirements.

  FIGS. 7 and 8 show an embodiment in which the vacuum insulated switchgear of the present invention is applied as a bus divider, and FIG. 7 shows an embodiment in which the vacuum insulated switchgear of the present invention is applied as a bus divider. The side view which shows a form, FIG. 8 is the electric circuit diagram. In these drawings, the same reference numerals as those shown in FIGS. 1 to 6 are the same or corresponding parts.

  In this embodiment, a vacuum two-point three-position type switch 8 is used as a vacuum two-point three-position type load breaking disconnector (LDS). And each fixed contact 81 of this switch 8 is connected to each solid insulation bus 5 with a conductor 83, and a ground switch 9 is connected to each conductor 83.

  9 and 10 show an embodiment in which the vacuum insulated switchgear of the present invention is applied as a feeder measuring panel, and FIG. 9 shows an embodiment in which the vacuum insulated switchgear of the present invention is applied as a feeder measuring panel. The side view which shows a form and FIG. 10 are the electric circuit diagrams. In these drawings, the same reference numerals as those shown in FIGS. 1 to 6 are the same or corresponding parts.

  In this embodiment, a vacuum two-point three-position type switch 8 is used as a vacuum disconnector (DS). Then, the fixed contact 81 on one side (right side in FIG. 9) of the switch 8 is connected to the bus bar and the single-phase winding measuring transformer 500 in the cable partition 4 by the conductor 83, and the conductor 83 is connected to the ground. The device 9 is connected.

  11 and 12 show an embodiment in which the vacuum insulated switchgear of the present invention is applied as a bus bar measuring panel, and FIG. 11 shows an embodiment in which the vacuum insulated switchgear of the present invention is applied as a bus bar measuring panel. The side view which shows a form and FIG. 12 are the electric circuit diagrams. In these drawings, the same reference numerals as those shown in FIGS. 1 to 6 are the same or corresponding parts.

  In this embodiment, a vacuum two-point three-position type switch 8 is used as a vacuum disconnector (DS). Then, the fixed contact 81 on one side (right side in FIG. 11) of the switch 8 is connected to the bus bar, the single-phase winding type measurement transformer 500 in the cable partition 4 by one conductor 83, and the switch 8 The fixed contact 81 on the other side (left side in FIG. 11) is connected to the solid insulated bus 5 by the other conductor 83, and the ground switch 9 is connected to the one conductor 83.

  According to the above-described embodiment of the present invention, the vacuum two-point three-position type switch can be used as a breaker or breaker, so that it can flexibly respond to various requests of users. Can do. In addition, it is easy to handle and expand.

  Moreover, according to embodiment of this invention mentioned above, it has the structure of the switch of a vacuum 2 point cutting 3 position type | mold, can achieve the double of a interruption | blocking part and a disconnection part, and the reliability is high.

  Further, according to the above-described embodiment of the present invention, since the primary circuit has a completely phase-separated structure, it is possible to minimize the phase-to-phase short-circuit accident, and the switch is double-insulated between the vacuum and the mold. As a structure, it is possible to prevent ground faults due to vacuum leakage, and further emphasize the insulation of the switch as "correlation insulation> insulation between contacts at disconnection> insulation between contacts at disconnection> insulation between contacts of ground switch" It is excellent in safety because it is set in the relationship and is suppressed to at least one line ground fault, and the spread of the accident can be suppressed as much as possible.

  Furthermore, since the switch part in the switch is vacuum-insulated, the vacuum vessel can be reduced in thickness and weight, and the switch can be reduced in weight and size. Thereby, transportation and installation are easy, and the floor installation load can be reduced.

It is a side view which shows one Embodiment which applied the vacuum insulation switchgear of this invention as a feeder board in a partial cross section. It is a front view which shows one Embodiment which applied the vacuum insulation switchgear of this invention shown in FIG. 1 as a feeder board in a partial cross section. It is a perspective view which shows one Embodiment which applied the vacuum insulation switchgear of this invention shown in FIG. 1 as a feeder board in a partial cross section. It is the electric circuit diagram of one Embodiment which applied the vacuum insulation switchgear of this invention shown in FIG. 1 as a feeder board. It is a longitudinal cross-sectional view of the switch part which comprises the vacuum insulation switchgear of this invention shown in FIG. It is a perspective view which expands and partially shows one Embodiment of the switch part which comprises the vacuum insulation switchgear of this invention shown in FIG. 1, and its operation mechanism. It is a side view which shows one Embodiment which applied the vacuum insulation switchgear of this invention as a bus-line division board in a partial cross section. FIG. 8 is an electric circuit diagram of an embodiment in which the vacuum insulated switchgear of the present invention shown in FIG. 7 is applied as a bus dividing board. It is a side view which shows one Embodiment which applied the vacuum insulation switchgear of this invention as a feeder measurement board in a partial cross section. FIG. 10 is an electric circuit diagram of an embodiment in which the vacuum insulated switchgear of the present invention shown in FIG. 9 is applied as a feeder measurement panel. It is a side view which shows one Embodiment which applied the vacuum insulation switchgear of this invention as a bus-line measuring board in a partial cross section. FIG. 12 is an electric circuit diagram of an embodiment in which the vacuum insulated switchgear of the present invention shown in FIG. 11 is applied as a busbar measuring panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Low voltage | pressure control division part 3 High voltage | pressure switch division part 4 Bus line, cable division part 5 Bus line 6 Cable head 8 Vacuum 2-point cut 3 position type switch 9 Grounding switch 11 Operation device

Claims (7)

  A housing having a low voltage control partition section, a high voltage switch partition section, a busbar, and a cable partition section partitioned by a ground metal plate, and a vacuum two-point cut having a breaking disconnect function provided in the high voltage switch partition section of the casing A vacuum-insulated switchgear comprising a three-position type switch and its operating device, and a busbar of the housing, a busbar provided in a cable section, or a cable.   A casing having a low voltage control partition section, a high voltage switch partition section, a busbar, and a cable partition section partitioned in order from the top in the vertical direction by a ground metal plate, and a cutoff disconnecting function provided in the high voltage switch partition section of the casing A vacuum two-point cut three-position type switch and its operating device, connected to one fixed contact of the switch, a cable arranged in the busbar, cable section, and the other fixed contact of the switch A vacuum insulated switchgear comprising: a busbar connected to the bus bar and the cable partition portion; and a vacuum grounding switch connected to the cable side and disposed in the high voltage switch partition portion.   A casing having a low voltage control partition section, a high voltage switch partition section, a busbar, and a cable partition section partitioned in order from the top in the vertical direction by a ground metal plate, and a cutoff disconnecting function provided in the high voltage switch partition section of the casing A vacuum two-point cut three-position type switch and its operating device, one fixed contact of the switch and the other fixed contact, respectively, the bus, the bus arranged in the cable partition, A vacuum insulated switchgear comprising a vacuum grounding switch connected between each bus bar and each fixed contact and disposed in the high-voltage switch compartment.   A casing having a low voltage control partition section, a high voltage switch partition section, a busbar, and a cable partition section partitioned in order from the vertical direction by a ground metal plate, and a disconnect function provided in the high voltage switch partition section of the casing A vacuum two-point switch and its operating device, connected to one fixed contact of the switch, connected to the line side arranged in the busbar and cable section, and to the other fixed contact of the switch An instrument transformer disposed in the busbar and cable compartment, and a vacuum grounding switch connected between the other fixed contact of the switch and the instrument transformer, and disposed in the high-voltage switch compartment. A vacuum insulated switchgear characterized by comprising:   A casing having a low voltage control partition section, a high voltage switch partition section, a busbar, and a cable partition section partitioned in order from the vertical direction by a ground metal plate, and a disconnect function provided in the high voltage switch partition section of the casing A two-point vacuum switch, connected to one fixed contact of the switch, connected to the bus and the other fixed contact of the switch, and connected to the bus and the other fixed contact of the switch. An instrument transformer disposed in the compartment, and a vacuum ground switch connected between the other fixed contact of the switch and the instrument transformer, and disposed in the high-voltage switch compartment. Features vacuum insulated switchgear.   The vacuum insulated switchgear according to claim 2, further comprising a voltage detector connected to the line side of the vacuum grounding switch and disposed in the high-voltage switch compartment.   The vacuum insulated switchgear according to claim 3, further comprising a voltage detector connected to the bus bar side of the vacuum grounding switch and disposed in the high voltage switch compartment.

Images