CN112233931A - Load switch device with PT (potential transformer) and installation construction method - Google Patents
Load switch device with PT (potential transformer) and installation construction method Download PDFInfo
- Publication number
- CN112233931A CN112233931A CN202011009653.8A CN202011009653A CN112233931A CN 112233931 A CN112233931 A CN 112233931A CN 202011009653 A CN202011009653 A CN 202011009653A CN 112233931 A CN112233931 A CN 112233931A
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- Prior art keywords
- load switch
- switch
- insulating shaft
- load
- operating handle
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/64—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid wherein the break is in gas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/6606—Terminal arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
Abstract
The invention belongs to the technical field of live working, in particular to a load switch device with a voltage transformer of a distribution line and an installation construction method, and relates to a load switch device with a PT (potential transformer), which comprises a metal shell, an insulated cable outgoing line, an insulated cable incoming line, a spring type spring operating mechanism, an operating handle, an alternating current contactor KM1, an alternating current contactor KM2, a first insulating shaft, a second insulating shaft and a vacuum tube capable of being opened and closed frequently, and is characterized in that: the alternating current contactor KM1 and the alternating current contactor KM2 form an electric interlocking connection PT. The PT lead wires in the switch are electrically interlocked, so that the PT lead wires are ensured to be in the disconnection position before the load switch is switched on or switched off a main loop during troubleshooting, and explosion accidents caused by the connection of a transformer with voltage with the load switch are avoided.
Description
Technical Field
The invention belongs to the technical field of live working, and particularly relates to a load switch device with a Potential Transformer (PT) for a distribution line and an installation and construction method.
Background
The safety regulation requires that a voltage transformer cannot be connected with a lead wire, so that high requirements are provided for the installation of a PT load switch. In recent years, accidents of switch explosion caused by connecting load switches with PT continuously occur.
At present, the same type of current latest load switches with PT assembly and disassembly at home and abroad adopts a typical design scheme, the PT lead wires are led out and added into a group of drop-out fuses, and when the load switches are connected or disassembled, the drop-out fuses are checked to be in the disconnection positions, so that the voltage-free mutual inductors are ensured to be connected into the switch lead wires. However, the typical design scheme for popularization in the power system has the disadvantages that three layers of cross arms are arranged up and down, the construction is complex, the double-rod construction is easy, the operation position is limited during the single-rod construction, the operation complexity is improved, and the safety risk is correspondingly increased. This is a disadvantage of the prior art.
Disclosure of Invention
The invention aims to provide a load switch device with a PT and an installation construction method aiming at the defects in the prior art, so as to solve the problems of switch explosion and complicated typical design construction caused by switch connection and switch disconnection with the PT.
In order to achieve the purpose, the invention provides the following technical scheme:
a load switch device with PT comprises a metal shell, an insulated cable outgoing line, an insulated cable incoming line, a spring type spring operation mechanism, an operating handle, an alternating current contactor KM1, an alternating current contactor KM2, a first insulating shaft, a second insulating shaft and an arc extinguishing vacuum tube capable of being opened and closed frequently, and is characterized in that: the alternating current contactor KM1 and the alternating current contactor KM2 form an electric interlocking connection PT.
Preferably, the load switch device with the PT further comprises a double-break switch, an isolation knife is arranged in the double-break switch, and the double-break switch fully ensures the opening and closing safety.
Preferably, the operating handle is provided with a manual position and an automatic position; when the operating handle is positioned at an 'automatic' position, the operating handle controls a first insulating shaft and a second insulating shaft through a spring type spring operation mechanism, the first insulating shaft rotates to correspond to the closing of the double-break switch, and the second insulating shaft rotates to pull the load switch; when the operating handle is in a manual position, the operating handle controls the first insulating shaft and the second insulating shaft through the spring type spring operation mechanism, the first insulating shaft rotates to correspond to the opening of the double-break switch, and the second insulating shaft rotates to disconnect the load switch.
Preferably, the first insulating shaft drives the double-break switch; the second insulating shaft drives the arc extinguishing vacuum tube to be opened and closed frequently; the closing of the double-fracture switch and the closing of the arc extinguishing vacuum tube which can be frequently opened and closed make the load switch form a main loop; the arc extinguishing vacuum tube capable of being opened and closed frequently has large breaking capacity and long service life of the contact, is suitable for frequent operation, can be opened and closed repeatedly, and does not generate high-pressure gas and harmful gas.
Preferably, the load switch device with PT is filled with SF with equal atmospheric pressure6Gas, the metal shell is a full-sealing structure, and the inside of the metal shell is provided with SF with equal atmospheric pressure6Gas, said equiatmospheric pressure SF6The gas has arc extinguishing characteristics and can be used as an insulating medium, so that the protective belt PT load switch device can be used.
Preferably, the insulated cable inlet wire and the insulated cable outlet wire are arranged on the left side of the device, the insulated cable outlet wire is arranged on the right side of the device, and the insulated cable is light in weight and high in load capacity.
Preferably, the load switch device with the PT further comprises a zero sequence current transformer and a line current transformer, wherein the upper side of the part, in the metal shell, of the insulated cable outgoing line is provided with the zero sequence current transformer, and the lower side of the part, in the metal shell, of the insulated cable outgoing line is provided with the line current transformer; when an electric shock or electric leakage fault occurs in the circuit, the secondary side of the mutual inductor outputs zero-sequence current to ensure that equipment on a connected secondary circuit is protected; the current transformer converts a large current in an alternating current circuit into a small current with a certain proportion.
The invention also provides an installation and construction method of the load switch with the PT, which comprises the following steps:
s1, installing a new access lead of the load switch;
s2, normal operation of the load switch;
s3, the load switch quits the operation step;
and S4, load switch maintenance.
Preferably, the S1 specifically comprises the following steps that when a load switch is installed with a new access lead, an operating handle is converted to a manual position, the electric interlocking KM1/KM2 is put into operation, the KM1 keeps an off position, and when a spring-operated mechanism is operated to pull on and off the load switch, the KM2 forces the KM1 to be always in the off position; at the moment, a load switch lead is connected in a live state; the operating handle is converted to an 'automatic' position, the electric interlocking KM1/KM2 is withdrawn from running, when the spring type spring operating mechanism is operated to pull and close the load switch, the KM1 is in a conducting state, and the PT starts to work normally.
Preferably, the S2 specifically includes the following steps: under the normal operation construction state of load switch, when carrying out normal draw at this moment and closing, when disconnected operation, the operating handle is in "automatic" position all the time, and electric interlocking KM1/KM2 withdraws from operation, and KM1 keeps the conducting state, and PT normally works.
Preferably, the S3 specifically comprises the following steps that the operating handle is switched to a 'manual' position, the electric interlock KM1/KM2 is put into operation, when the spring type spring-operated mechanism is operated to disconnect a load switch, the KM1 is operated to enable the PT access lead to be in a disconnected position, and the PT is withdrawn from operation; at this time, the live line opens the load switch lead.
Preferably, the S4 specifically comprises the following steps that the operating handle is switched to a 'manual' position, the electric interlock KM1/KM2 is put into operation, when the spring type spring operating mechanism is operated to disconnect the load switch, the KM1 is operated to enable the PT access lead to be in a disconnected position, the PT is withdrawn from operation, and at the moment, the load switch lead is disconnected in a charged manner; carrying out a switch maintenance step, and connecting a load switch lead in an electrified manner after the switch maintenance is finished; the operating handle is switched to the 'automatic' position, the electric interlocking KM1/KM2 is out of operation, when the spring type spring-operated mechanism pulls and closes the load switch, KM1 is in a conducting state, and PT starts to work normally.
The PT lead wire has the advantages that the PT lead wire in the switch is electrically interlocked, so that the PT lead wire is ensured to be in a disconnection position before the switch is switched on or switched off a main loop during fault maintenance; meanwhile, the invention adopts a single-layer cross arm installation construction process, thereby greatly reducing the construction difficulty and improving the operation safety. In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Therefore, compared with the prior art, the invention has prominent substantive features and remarkable progress, and the beneficial effects of the implementation are also obvious.
Drawings
Fig. 1 is a schematic structural view of a load switch with PT.
Wherein, 1-metal shell; 2-spring type spring operating mechanism; 3-equiatmospheric SF6A gas; 4-double break switch; 5-insulated cable lead-ins; 6-a voltage transformer; 7-the arc extinguishing vacuum tube can be opened and closed frequently; 8-built-in line current transformer; 9-insulated cable outlet; 10-a built-in zero sequence current transformer; 11-a first insulating shaft; 12-a second insulated shaft; 13-ac contactor KM 1; 14-alternating current contactor KM 2.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings by way of specific examples, which are illustrative of the present invention and are not limited to the following embodiments.
A load switching device with PT as shown in fig. 1 includes: metal casing (1), insulated cable lead-out wire (9), insulated cable inlet wire (5), spring operation mechanism (2), operating handle, ac contactor KM1(13), ac contactor KM2(14), first insulating axle (11) and second insulating axle (12), arc extinguishing vacuum tube (7) that can frequently open and shut, its characterized in that: the alternating current contactor KM1(13) and the alternating current contactor KM2(14) form an electric interlocking connection PT (6).
Preferably, the load switch device with the PT further comprises a double-break switch (4), an isolation knife is arranged in the double-break switch (4), and the double-break switch (4) fully ensures the opening and closing safety.
The operating handle is provided with a manual position and an automatic position; when the operating handle is positioned at an 'automatic' position, the operating handle controls a first insulating shaft (11) and a second insulating shaft (12) through a spring type spring operation mechanism (2), the first insulating shaft (11) rotates corresponding to the closing of the double-break switch (4), and the second insulating shaft (12) rotates to pull the load switch; when the operating handle is in a manual position, the operating handle controls a first insulating shaft (11) and a second insulating shaft (12) through a spring type spring operation mechanism (2), the first insulating shaft (11) rotates to correspond to the opening of the double-break switch (4), and the second insulating shaft (12) rotates to enable the load switch to be disconnected.
The first insulating shaft (11) drives the double-break switch (4); the second insulating shaft (12) drives the arc extinguishing vacuum tube (7) to be opened and closed frequently. The closing of the double-fracture switch (4) and the closing of the arc extinguishing vacuum tube (7) which can be frequently opened and closed make the load switch form a main loop; the arc extinguishing vacuum tube (7) capable of being opened and closed frequently has large breaking capacity and long service life of the contact, is suitable for frequent operation, can be opened and closed repeatedly, and does not generate high-pressure gas and harmful gas.
Load switch device with PT (potential transformer) is filled with SF (equal atmospheric pressure)6Gas (3), the metal shell (1) is of a full-sealing structure, and the metal shell (1) is internally provided with SF with equal atmospheric pressure6Gas (3), said equiatmospheric pressure SF6The gas (3) has arc extinguishing properties and can act as an insulating medium, thereby achieving the function of protecting the belt PT load switch device.
The insulation cable comprises an insulation cable lead-in wire (5) and an insulation cable lead-out wire (9), wherein the insulation cable lead-in wire (5) is arranged on the left side of the device, the insulation cable lead-out wire (9) is arranged on the right side of the device, and the insulation cable is light in weight and strong in load capacity.
The load switch device with the PT further comprises a zero sequence current transformer (10) and a line current transformer (8), wherein the upper side of the part, in the metal shell (1), of the insulated cable outgoing line (9) is provided with the zero sequence current transformer (10), and the lower side of the part is provided with the line current transformer (8); when an electric shock or electric leakage fault occurs in the circuit, the secondary side of the mutual inductor outputs zero-sequence current to ensure that equipment on a connected secondary circuit is protected; the current transformer converts a large current in an alternating current circuit into a small current with a certain proportion.
The invention also provides an installation and construction method of the load switch with the PT, which comprises the following steps:
s1, installing a new access lead of the load switch;
s2, normal operation of the load switch;
s3, the load switch quits the operation step;
and S4, load switch maintenance.
When a load switch is newly connected with a lead, an operating handle is converted to a manual position, an electric interlocking KM1/KM2 is put into operation, a KM1 keeps a disconnected position, and a spring type elastic operating mechanism is operated to pull on and disconnect the load switch, KM2 forces KM1 to be in the disconnected position all the time; at the moment, a load switch lead is connected in a live state; the operating handle is converted to an 'automatic' position, the electric interlocking KM1/KM2 is withdrawn from running, when the spring type spring operating mechanism is operated to pull and close the load switch, the KM1 is in a conducting state, and the PT starts to work normally.
The S2 specifically includes the following steps: under the normal operation construction state of load switch, when carrying out normal draw at this moment and closing, when disconnected operation, the operating handle is in "automatic" position all the time, and electric interlocking KM1/KM2 withdraws from operation, and KM1 keeps the conducting state, and PT normally works.
The S3 concretely comprises the following steps that an operation handle is switched to a manual position, the electric interlocking KM1/KM2 is put into operation, when a spring type spring operating mechanism is operated to disconnect a load switch, the KM1 acts to enable a PT access lead to be in a disconnection position, and the PT is withdrawn from operation; at this time, the live line opens the load switch lead.
The S4 concretely comprises the following steps that an operation handle is switched to a manual position, an electric interlocking KM1/KM2 is put into operation, when a spring type spring operating mechanism is operated to disconnect a load switch, a KM1 acts to enable a PT access lead to be in a disconnection position, the PT quits operation, and at the moment, the load switch lead is disconnected in a charged mode; carrying out a switch maintenance step, and connecting a load switch lead in an electrified manner after the switch maintenance is finished; the operating handle is switched to the 'automatic' position, the electric interlocking KM1/KM2 is out of operation, when the spring type spring-operated mechanism pulls and closes the load switch, KM1 is in a conducting state, and PT starts to work normally.
The above disclosure is only for the preferred embodiments of the present invention, but the present invention is not limited thereto, and any non-inventive changes that can be made by those skilled in the art and several modifications and amendments made without departing from the principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A load switch device with PT comprises a metal shell, an insulated cable outgoing line, an insulated cable incoming line, a spring type spring operation mechanism, an operating handle, an alternating current contactor KM1, an alternating current contactor KM2, a first insulating shaft, a second insulating shaft and an arc extinguishing vacuum tube capable of being opened and closed frequently, and is characterized in that: the alternating current contactor KM1 and the alternating current contactor KM2 form an electric interlocking connection PT.
2. A PT-equipped load switching device as claimed in claim 1, wherein: the load switch device with the PT further comprises a double-break switch, wherein an isolation knife is arranged in the double-break switch; the first insulating shaft drives the double-break switch; the second insulating shaft drives the arc extinguishing vacuum tube to be opened and closed frequently.
3. A PT-equipped load switching device as claimed in claim 2, wherein: the operating handle is provided with a manual position and an automatic position; when the operating handle is positioned at an 'automatic' position, the operating handle controls a first insulating shaft and a second insulating shaft through a spring type spring operation mechanism, the first insulating shaft rotates to correspond to the closing of the double-break switch, and the second insulating shaft rotates to pull the load switch; when the operating handle is in a manual position, the operating handle controls the first insulating shaft and the second insulating shaft through the spring type spring operation mechanism, the first insulating shaft rotates to correspond to the opening of the double-break switch, and the second insulating shaft rotates to disconnect the load switch.
4. A PT-equipped load switching device as claimed in claim 3, wherein: the metal shell is of a full-sealing structure, and the metal shell is filled with SF (equal atmospheric pressure)6A gas.
5. A load switching device with PT according to claim 4 wherein: the utility model provides a take PT load switch device still includes, zero sequence current transformer, circuit current transformer, the partial upside of insulated cable lead-out wire in metal casing be provided with zero sequence current transformer, the downside is provided with circuit current transformer.
6. The invention also provides an installation and construction method of the load switch with the PT, which comprises the following steps:
s1, installing a new access lead of the load switch;
s2, normal operation of the load switch;
s3, the load switch quits the operation step;
and S4, load switch maintenance.
7. The installation and construction method of the load switch with the PT according to claim 6, characterized in that: when a load switch is newly connected with a lead, an operating handle is converted to a manual position, an electric interlocking KM1/KM2 is put into operation, a KM1 keeps a disconnected position, and a spring type elastic operating mechanism is operated to pull on and disconnect the load switch, KM2 forces KM1 to be in the disconnected position all the time; at the moment, a load switch lead is connected in a live state; the operating handle is converted to an 'automatic' position, the electric interlocking KM1/KM2 is withdrawn from running, when the spring type spring operating mechanism is operated to pull and close the load switch, the KM1 is in a conducting state, and the PT starts to work normally.
8. The installation and construction method of the load switch with the PT according to claim 7, characterized in that: the S2 specifically includes the following steps: under the normal operation construction state of load switch, when carrying out normal draw at this moment and closing, when disconnected operation, the operating handle is in "automatic" position all the time, and electric interlocking KM1/KM2 withdraws from operation, and KM1 keeps the conducting state, and PT normally works.
9. The installation and construction method of the load switch with the PT according to claim 8, characterized in that: the S3 concretely comprises the following steps that an operation handle is switched to a manual position, the electric interlocking KM1/KM2 is put into operation, when a spring type spring operating mechanism is operated to disconnect a load switch, the KM1 acts to enable a PT access lead to be in a disconnection position, and the PT is withdrawn from operation; at this time, the live line opens the load switch lead.
10. The installation and construction method of the load switch with the PT according to claim 9, characterized in that: the S4 concretely comprises the following steps that an operation handle is switched to a manual position, an electric interlocking KM1/KM2 is put into operation, when a spring type spring operating mechanism is operated to disconnect a load switch, a KM1 acts to enable a PT access lead to be in a disconnection position, the PT quits operation, and at the moment, the load switch lead is disconnected in a charged mode; carrying out a switch maintenance step, and connecting a load switch lead in an electrified manner after the switch maintenance is finished; the operating handle is switched to the 'automatic' position, the electric interlocking KM1/KM2 is out of operation, when the spring type spring-operated mechanism pulls and closes the load switch, KM1 is in a conducting state, and PT starts to work normally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011009653.8A CN112233931B (en) | 2020-09-23 | 2020-09-23 | Load switch device with PT and installation construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011009653.8A CN112233931B (en) | 2020-09-23 | 2020-09-23 | Load switch device with PT and installation construction method |
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| Publication Number | Publication Date |
|---|---|
| CN112233931A true CN112233931A (en) | 2021-01-15 |
| CN112233931B CN112233931B (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011009653.8A Active CN112233931B (en) | 2020-09-23 | 2020-09-23 | Load switch device with PT and installation construction method |
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| CN (1) | CN112233931B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0201695A2 (en) * | 1985-04-16 | 1986-11-20 | BROWN,BOVERI & CIE Aktiengesellschaft | Load-break switch and switching circuit using this load-break switch |
| CN2626111Y (en) * | 2003-05-27 | 2004-07-14 | 贺晓红 | Outdoor high-voltage wattles automatic compensating equipment |
| KR100848123B1 (en) * | 2007-12-27 | 2008-07-24 | 홍정애 | A compact multi-function switchgear |
| CN202523624U (en) * | 2012-03-20 | 2012-11-07 | 厦门智能达电控有限公司 | On-post vacuum user demarcation load switch device |
| CN203352037U (en) * | 2013-06-14 | 2013-12-18 | 北京合纵科技股份有限公司 | Outdoor high-voltage solid insulated column switch platform |
| CN203397961U (en) * | 2013-07-03 | 2014-01-15 | 天津市既济电气控制设备有限公司 | Special mobile power supply switch for maintenance and debugging |
| CN203504183U (en) * | 2013-10-15 | 2014-03-26 | 国家电网公司 | Manual phase-change switch system |
| CN104051180A (en) * | 2014-06-04 | 2014-09-17 | 柳州市海格电气有限公司 | 10kV pole-mounted vacuum load switch |
| CN104538243A (en) * | 2015-01-27 | 2015-04-22 | 浙江群力电气有限公司 | Vacuum load switch |
| CN205508705U (en) * | 2016-01-08 | 2016-08-24 | 乾瑞电气有限公司 | Vacuum load switch on post |
| CN205542567U (en) * | 2016-05-03 | 2016-08-31 | 浙江宏伟电网科技股份有限公司 | Outdoor vacuum load switch |
| CN105958633A (en) * | 2016-06-22 | 2016-09-21 | 中航太克（厦门）电力技术股份有限公司 | Two-way power supply automatic switching power supply circuit |
| CN207097707U (en) * | 2017-08-09 | 2018-03-13 | 华电北瑞电气(北京)有限公司 | A kind of regulator cubicle electrical verification anti-misoperation system |
| CN210984601U (en) * | 2019-12-24 | 2020-07-10 | 北京科锐配电自动化股份有限公司 | High-voltage AC load switch with spring operating mechanism |
-
2020
- 2020-09-23 CN CN202011009653.8A patent/CN112233931B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0201695A2 (en) * | 1985-04-16 | 1986-11-20 | BROWN,BOVERI & CIE Aktiengesellschaft | Load-break switch and switching circuit using this load-break switch |
| CN2626111Y (en) * | 2003-05-27 | 2004-07-14 | 贺晓红 | Outdoor high-voltage wattles automatic compensating equipment |
| KR100848123B1 (en) * | 2007-12-27 | 2008-07-24 | 홍정애 | A compact multi-function switchgear |
| CN202523624U (en) * | 2012-03-20 | 2012-11-07 | 厦门智能达电控有限公司 | On-post vacuum user demarcation load switch device |
| CN203352037U (en) * | 2013-06-14 | 2013-12-18 | 北京合纵科技股份有限公司 | Outdoor high-voltage solid insulated column switch platform |
| CN203397961U (en) * | 2013-07-03 | 2014-01-15 | 天津市既济电气控制设备有限公司 | Special mobile power supply switch for maintenance and debugging |
| CN203504183U (en) * | 2013-10-15 | 2014-03-26 | 国家电网公司 | Manual phase-change switch system |
| CN104051180A (en) * | 2014-06-04 | 2014-09-17 | 柳州市海格电气有限公司 | 10kV pole-mounted vacuum load switch |
| CN104538243A (en) * | 2015-01-27 | 2015-04-22 | 浙江群力电气有限公司 | Vacuum load switch |
| CN205508705U (en) * | 2016-01-08 | 2016-08-24 | 乾瑞电气有限公司 | Vacuum load switch on post |
| CN205542567U (en) * | 2016-05-03 | 2016-08-31 | 浙江宏伟电网科技股份有限公司 | Outdoor vacuum load switch |
| CN105958633A (en) * | 2016-06-22 | 2016-09-21 | 中航太克（厦门）电力技术股份有限公司 | Two-way power supply automatic switching power supply circuit |
| CN207097707U (en) * | 2017-08-09 | 2018-03-13 | 华电北瑞电气(北京)有限公司 | A kind of regulator cubicle electrical verification anti-misoperation system |
| CN210984601U (en) * | 2019-12-24 | 2020-07-10 | 北京科锐配电自动化股份有限公司 | High-voltage AC load switch with spring operating mechanism |
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| Publication number | Publication date |
|---|---|
| CN112233931B (en) | 2023-09-29 |
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