CN107680332B - Warning device for preventing misoperation of high-voltage switch cabinet - Google Patents
Warning device for preventing misoperation of high-voltage switch cabinet Download PDFInfo
- Publication number
- CN107680332B CN107680332B CN201710906041.0A CN201710906041A CN107680332B CN 107680332 B CN107680332 B CN 107680332B CN 201710906041 A CN201710906041 A CN 201710906041A CN 107680332 B CN107680332 B CN 107680332B
- Authority
- CN
- China
- Prior art keywords
- switch
- electrically connected
- contact
- change
- intermediate relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention discloses a warning device for preventing misoperation of a high-voltage switch cabinet, and belongs to the technical field of electrical equipment safety. The invention comprises a fuse, an intermediate relay, a change-over switch, a light word plate, an infrared induction switch, an audible and visual alarm, a control power supply phase line, a control power supply neutral line and a wiring terminal, wherein the change-over switch, the light word plate, the infrared induction switch and the audible and visual alarm are arranged on a panel of the device; the device input switching value contact is led from a closed circuit breaker auxiliary contact in the switch cabinet and a switch cabinet handcart test position contact; the intermediate relay coil control loop is electrically connected with the change-over switch in series; the output contact circuit of the intermediate relay is electrically connected with the light word plate in series; the output contact loop of the infrared inductive switch is electrically connected with the audible and visual alarm in series; the invention is fixedly arranged on the high-voltage switch, displays the maintenance state of the switch through the light character board arranged on the device, is assisted with the visual and auditory reminding of an alarm and voice prompt system, plays an active warning role and avoids misoperation.
Description
Technical Field
The invention relates to the technical field of electrical equipment safety, in particular to a warning device for preventing misoperation of a high-voltage switch cabinet.
Background
In the distribution system that supplies, the return circuit of being qualified for the next round of competitions of 10kV and above system high tension switchgear is equipment such as transformer or high tension motor basically, and electrical equipment and high-tension cabinet are not arranged in same place, when the equipment has a power failure and overhauls, and conventional way hangs "equipment maintenance on the cubical switchboard, forbids the sign of closing a floodgate", nevertheless probably causes the sign to fall or operating personnel not notices the sign of hanging because of some reason to cause the cubical switchboard mistake to close a floodgate, arouse equipment and personal accident.
Disclosure of Invention
1. Problems to be solved
Aiming at the problems and the defects in the prior art, the invention provides the warning device for preventing the misoperation of the high-voltage switch cabinet, the device is fixedly arranged on the high-voltage switch, the maintenance state of the switch is displayed through the light character plate arranged on the device, and the warning and voice prompting system is assisted to give visual and auditory reminders to people, so that the active warning effect is realized, and the misoperation is avoided.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the warning device for preventing the misoperation of the high-voltage switch cabinet comprises a fuse, an intermediate relay, a change-over switch, an optical character plate, an infrared induction switch, an audible and visual alarm, a control power supply phase line, a control power supply neutral line and a wiring terminal, wherein the change-over switch, the optical character plate, the infrared induction switch and the audible and visual alarm are arranged on a panel of the device; the intermediate relay and the fuse are arranged in the device; the terminals are arranged on the back of the device; the control power phase line is electrically connected with the device power phase line; the control power supply neutral wire is electrically connected with a neutral wire of the device power supply; the device input switching value contact is led from a closed circuit breaker auxiliary contact in the switch cabinet and a switch cabinet handcart test position contact; the intermediate relay coil control loop is electrically connected with the change-over switch in series; the output contact circuit of the intermediate relay is electrically connected with the light word plate in series; the output contact loop of the infrared inductive switch is electrically connected with the audible and visual alarm in series;
one end of two pairs of contact points of the change-over switch is connected with a device power phase line, and the other end of the change-over switch is connected with an external leading switch quantity contact point; the other end of the external leading switching value contact is electrically connected with an intermediate relay; one end of an output normally open contact of the intermediate relay is electrically connected with a power phase line of the device, and the other end of the output normally open contact of the intermediate relay is electrically connected with the light word plate; one end of the other secondary contact of the change-over switch is connected with a device power phase line, and the other end of the other secondary contact of the change-over switch is electrically connected with the infrared induction switch coil; one end of the audible and visual alarm is electrically connected with an output contact of the infrared induction switch; the other end of the audible and visual alarm is electrically connected with a control power supply neutral wire.
As a further improvement of the invention, a fuse is arranged on the control power supply line.
As a further improvement of the invention, the warning device is fixedly arranged on the high-voltage switch cabinet.
As a further improvement of the invention, the outlet of the warning device can be sent to a computer background for displaying and locking a closing loop.
3. Advantageous effects
Compared with the prior art, the invention has the beneficial effects that:
(1) the warning device for preventing misoperation of the high-voltage switch cabinet can effectively prevent computer background false switching-on during equipment maintenance, and can effectively ensure equipment and personal safety.
(2) The warning device for preventing the misoperation of the high-voltage switch cabinet has a simple structure, is convenient to install and maintain, and reduces the possibility of error.
Drawings
FIG. 1 is a schematic diagram of the control principle of the present invention;
fig. 2 is a schematic view of the external structure of the present invention.
In the figure: 1. a fuse; 2. an intermediate relay; 3. a transfer switch; 4. a light word plate; 5. an infrared inductive switch; 6. an audible and visual alarm; 7. controlling a power phase line; 8. controlling a power supply neutral line; 9. a test position contact of the switch cabinet handcart; 10. the circuit breaker auxiliary contacts.
Detailed Description
The invention will be further described with reference to specific embodiments and the accompanying drawings in which:
example 1
As shown in fig. 1-2, the warning device for preventing misoperation of a high-voltage switch cabinet in the embodiment comprises a fuse 1, an intermediate relay 2, a change-over switch 3, a light character plate 4, an infrared induction switch 5, an audible and visual alarm 6, a control power phase line 7, a control power neutral line 8 and a terminal, wherein the change-over switch 3, the light character plate 4, the infrared induction switch 5 and the audible and visual alarm 6 are mounted on a panel of the device; the intermediate relay 2 and the fuse 1 are installed in the device, and the terminal is arranged on the back of the device; the control power supply phase line 7 is electrically connected with the device power supply phase line, and the control power supply neutral line 8 is electrically connected with the neutral line of the device power supply; the device input switching value contact is led from a closed circuit breaker auxiliary contact 10 in the switch cabinet and a switch cabinet handcart test position contact 9; the coil control loop of the intermediate relay 2 is electrically connected with the change-over switch 3 in series, the output contact loop of the intermediate relay 2 is electrically connected with the light word plate 4 in series, and the output contact loop of the infrared induction switch 5 is electrically connected with the audible and visual alarm 6 in series.
In the warning device for preventing misoperation of the high-voltage switch cabinet, one end of two pairs of contacts of a change-over switch 3 is connected with a device power phase line, the other end of the change-over switch 3 is connected with an external leading switch quantity contact, the other end of the external leading switch quantity contact is electrically connected with an intermediate relay 2, one end of an output normally open contact of the intermediate relay 2 is electrically connected with the device power phase line, and the other end of the output normally open contact of the intermediate relay is electrically connected with a light character plate 4; one end of the other secondary contact of the change-over switch 3 is connected with a phase line of a power supply of the device, the other end of the other secondary contact of the change-over switch 3 is electrically connected with a coil of the infrared induction switch 5, one end of the audible and visual alarm 6 is electrically connected with an output contact of the infrared induction switch 5, and the other end of the audible and visual alarm 6 is electrically connected with a neutral line 8 of the control power supply. Be provided with fuse 1 on foretell control power phase line 7, this warning device fixed mounting can avoid falling on the high tension switchgear, arouses the maloperation, and this warning device export can send computer background demonstration and shutting-down combined floodgate return circuit, avoids the mistake to close a floodgate.
The operation steps of the device are as follows: s1: when high-voltage equipment is overhauled, a breaker of a switch cabinet is opened, a normally open point of the breaker is closed and is positioned at a handcart test position 9 of the switch cabinet, and at the moment, when a change-over switch 3 is positioned at an overhauling position, an audible and visual alarm 6 is automatically started; s2: when the equipment is normally stopped but not in a maintenance state, the change-over switch 3 is in a normal stop state, and the maintenance alarm device is not started; s3: temporary 'power failure overhaul and switch-on forbidding' indicators can be not hung during normal equipment overhaul, and 'equipment overhaul and switch-on forbidding' can be displayed through the light character indicator 4; s4: only when someone is close to the maintenance switch cabinet, the infrared induction switch 5 acts, and the audible and visual alarm 6 is started to play a role in reminding. When the maintainer is doing maintenance work in the switch room, the acousto-optic alarm can be relieved through the change-over switch 3, and only the light character plate 4 is reserved to display 'equipment maintenance static switch-on'.
According to the warning device for preventing misoperation of the high-voltage switch cabinet, the first branch loop transfer switch 3 switch contacts SA-1 and SA-7 are electrically connected with a power phase line, the transfer switch 3 contacts SA-2 and SA-8 are respectively connected with the circuit breaker auxiliary contact 10 and the switch cabinet handcart test position contact 9 in the high-voltage switch cabinet, the other ends of the circuit breaker auxiliary contact 10 and the switch cabinet handcart test position contact 9 are connected with the coil of the intermediate relay 2, and the other end of the coil of the intermediate relay 2 is electrically connected with the power neutral line. The second branch loop of the control loop is provided with an intermediate relay 2 and an optical character plate 4 from a control power phase line 7 to a control power neutral line 8 in sequence. The third branch loop of the control loop is provided with a transfer switch 3 joint SA-3 and SA-4 joint and an infrared inductive switch 5 from a control power phase line 7 to a control power neutral line 8 in sequence. The fourth branch loop of the control loop is provided with an auxiliary contact of an infrared inductive switch 5 and a sound-light alarm 6 from the phase line of the control power supply to the neutral line of the control power supply in sequence. The normally closed contact of the output contact of the intermediate relay 2 is used for locking a switch-on loop of the switch cabinet breaker, and the normally open contact of the output contact of the intermediate relay 2 is used for displaying the state of a computer system or logically locking the switch-on loop. The audible and visual alarm can be set to be a common alarm buzzing sound and a voice prompt sound according to the preference of a user. In order to protect the control circuit, fuses 1 are provided on the phase lines connected to the control circuit in front of all the branches.
When the electricity carried by the outgoing line loop of the high-voltage switch cabinet needs to be maintained in a power failure mode, the switch cabinet breaker is opened, the normally closed auxiliary contact 10 of the breaker is closed and is positioned at the handcart test position contact 9 of the switch cabinet, and the auxiliary contact of the handcart test position contact 9 is closed, at the moment, the change-over switch 3 of the warning device for preventing the misoperation of the high-voltage switch cabinet is arranged at the maintenance position, the SA-7 contact and the SA-8 contact are conducted, the intermediate relay 2 is electrified, the auxiliary normally open contact of the intermediate relay 2 is closed, the light character plate 4 is electrified, and the condition that the equipment is maintained and is forbidden; meanwhile, the normally closed point of the intermediate relay 2 is disconnected, a closing loop is locked, the breaker cannot be closed, the normally open point of the intermediate relay 2 at the background of the computer is connected, the computer system displays that the switch cabinet is in an overhauling state, meanwhile, when the change-over switch 3 is in an overhauling position, the contacts SA-3 and SA-4 are connected, the infrared induction switch 5 is electrified, if a person is sensed to be close to the switch cabinet, the output contact is connected, the audible and visual alarm 6 is started, the voice prompt is sent while flashing is sent, and related persons are warned not to operate mistakenly. If the maintenance personnel need to maintain the switch cabinet or need to highly allocate indoor work, the change-over switch 3 can be arranged at the position of removing audible and visual alarm, at the moment, SA-1 and SA-2 are switched on, the optical character plate 4 normally displays that the equipment is maintained and switched on, meanwhile, the normally-closed point of the intermediate relay 4 is switched off, a switching-on loop is locked, a circuit breaker cannot be switched on, the normally-opened point of the intermediate relay 2 at the background of the computer is switched on, the computer system displays that the switch cabinet is in the maintenance state, but the audible and visual alarm 6 is not switched on due to the disconnection of the SA-3 and the SA-. When the switch cabinet is normally powered off, the change-over switch 3 is arranged at the normal stop position to prevent the misoperation of the high-voltage switch cabinet and the warning device from quitting the operation.
The warning device for preventing misoperation of the high-voltage switch cabinet is fixedly installed on the high-voltage switch, displays the maintenance state of the switch through the self-carried light character plate of the device, is assisted with the warning and voice prompt system to give visual and auditory reminders, plays an active warning role, and avoids misoperation.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (4)
1. The utility model provides a prevent high tension switchgear maloperation warning device which characterized in that: the device comprises a fuse (1), an intermediate relay (2), a change-over switch (3), an optical character plate (4), an infrared induction switch (5), an audible and visual alarm (6), a control power phase line (7), a control power neutral line (8) and a wiring terminal, wherein the change-over switch (3), the optical character plate (4), the infrared induction switch (5) and the audible and visual alarm (6) are arranged on a panel of the device; the intermediate relay (2) and the fuse (1) are arranged in the device; the terminals are arranged on the back of the device; the control power phase line (7) is electrically connected with the device power phase line; the control power supply neutral wire (8) is electrically connected with a neutral wire of a device power supply; the device input switching value contact is led from a closed circuit breaker auxiliary contact (10) in the switch cabinet and a switch cabinet handcart test position contact (9); the coil control loop of the intermediate relay (2) is electrically connected with the change-over switch (3) in series; the output contact circuit of the intermediate relay (2) is electrically connected with the light character plate (4) in series; the output contact loop of the infrared induction switch (5) is electrically connected with the audible and visual alarm (6) in series;
one end of two pairs of contact points of the change-over switch (3) is connected with a device power phase line, and the other end of the change-over switch (3) is connected with an external-leading switching value contact point; the other end of the external leading switching value contact is electrically connected with an intermediate relay (2); one end of an output normally open contact of the intermediate relay (2) is electrically connected with a power phase line of the device, and the other end of the output normally open contact is electrically connected with the light character plate (4); one end of the other secondary contact of the change-over switch (3) is connected with a device power phase line, and the other end of the other secondary contact of the change-over switch (3) is electrically connected with a coil of the infrared induction switch (5); one end of the audible and visual alarm (6) is electrically connected with an output contact of the infrared induction switch (5); the other end of the audible and visual alarm (6) is electrically connected with a control power supply neutral wire (8).
2. The warning device for preventing misoperation of the high-voltage switch cabinet according to claim 1, wherein: and a fuse (1) is arranged on the control power phase line (7).
3. The warning device for preventing misoperation of the high-voltage switch cabinet according to claim 1, wherein: the warning device is fixedly arranged on the high-voltage switch cabinet.
4. The warning device for preventing misoperation of the high-voltage switch cabinet according to claim 1, wherein: the outlet of the warning device can be sent to a computer background for displaying and locking a closing loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710906041.0A CN107680332B (en) | 2017-09-29 | 2017-09-29 | Warning device for preventing misoperation of high-voltage switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710906041.0A CN107680332B (en) | 2017-09-29 | 2017-09-29 | Warning device for preventing misoperation of high-voltage switch cabinet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107680332A CN107680332A (en) | 2018-02-09 |
| CN107680332B true CN107680332B (en) | 2020-05-08 |
Family
ID=61137707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710906041.0A Active CN107680332B (en) | 2017-09-29 | 2017-09-29 | Warning device for preventing misoperation of high-voltage switch cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107680332B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109149516B (en) * | 2018-10-23 | 2024-03-08 | 烟台东方威思顿电气有限公司 | High-voltage source safety protection system |
| CN111754734B (en) * | 2020-05-22 | 2022-05-31 | 金鑫 | Intelligent alarm device for electric switch |
| CN113436410B (en) * | 2021-06-02 | 2022-12-02 | 内蒙古蒙电华能热电股份有限公司乌海发电厂 | False opening alarm device of high tension switchgear backplate |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87215323U (en) * | 1987-11-10 | 1988-08-10 | 国营哈尔滨第一机器制造厂 | Automatic alarm high-tension switch gear cabinet by misoperation |
| CN2349708Y (en) * | 1998-10-30 | 1999-11-17 | 王德发 | Error operation proof device for electric switchcabinet |
| CN2836283Y (en) * | 2005-07-14 | 2006-11-08 | 杭州电器开关有限公司 | Armored central enclosed AC metal switch apparatus |
| CN202888633U (en) * | 2012-09-29 | 2013-04-17 | 福建通用恒泰电气设备有限公司 | Comprehensive distribution box capable of preventing misoperation |
| CN203351999U (en) * | 2013-07-08 | 2013-12-18 | 合肥虹光开关厂 | Anti-error type high tension switchgear |
| CN103872610A (en) * | 2012-12-11 | 2014-06-18 | 烟台史密得机电设备制造有限公司 | Metal armored intermediate withdrawable switch cabinet |
| CN204304453U (en) * | 2014-12-28 | 2015-04-29 | 国网山东省电力公司日照供电公司 | A kind of interlock protection structure of water-cooling type SVG equipment |
| CN204706818U (en) * | 2015-06-18 | 2015-10-14 | 国网安徽省电力公司培训中心 | A kind of high-tension switch cabinet switching-off device |
| CN205141497U (en) * | 2015-11-17 | 2016-04-06 | 江苏省水利勘测设计研究院有限公司 | Commutation isolated wheelbarrow |
| JP2016157588A (en) * | 2015-02-24 | 2016-09-01 | 株式会社ノーリツ | Fuel battery power generation system |
| CN107086667A (en) * | 2017-06-08 | 2017-08-22 | 国电大渡河流域水电开发有限公司 | A kind of outlet breaker closing circuit structure and its method of work |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2731602Y (en) * | 2004-07-30 | 2005-10-05 | 王伯典 | Speech indicating security tag for power system |
| CN201122807Y (en) * | 2007-12-07 | 2008-09-24 | 安徽鑫龙电器股份有限公司 | Switch cabinet status indicator |
| CN101692534B (en) * | 2009-06-24 | 2013-06-12 | 微山县供电公司 | Blocking against misoperation, alarming and protecting device of high-voltage switch cabinet |
| CN202276193U (en) * | 2011-10-13 | 2012-06-13 | 西安众恒科技有限公司 | Intelligent switch cabinet integrating intelligent operation and control and microcomputer protection |
| CN203276485U (en) * | 2013-05-30 | 2013-11-06 | 江苏徐塘发电有限责任公司 | Anti-misoperation alarm device of high voltage switch cabinet |
| CN205863677U (en) * | 2016-07-08 | 2017-01-04 | 国家电网公司 | High-tension switch cabinet on-line checking and display system |
| CN206331560U (en) * | 2016-12-29 | 2017-07-14 | 国网山东省电力公司日照供电公司 | Switch cabinet of converting station safety alarm device |
-
2017
- 2017-09-29 CN CN201710906041.0A patent/CN107680332B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87215323U (en) * | 1987-11-10 | 1988-08-10 | 国营哈尔滨第一机器制造厂 | Automatic alarm high-tension switch gear cabinet by misoperation |
| CN2349708Y (en) * | 1998-10-30 | 1999-11-17 | 王德发 | Error operation proof device for electric switchcabinet |
| CN2836283Y (en) * | 2005-07-14 | 2006-11-08 | 杭州电器开关有限公司 | Armored central enclosed AC metal switch apparatus |
| CN202888633U (en) * | 2012-09-29 | 2013-04-17 | 福建通用恒泰电气设备有限公司 | Comprehensive distribution box capable of preventing misoperation |
| CN103872610A (en) * | 2012-12-11 | 2014-06-18 | 烟台史密得机电设备制造有限公司 | Metal armored intermediate withdrawable switch cabinet |
| CN203351999U (en) * | 2013-07-08 | 2013-12-18 | 合肥虹光开关厂 | Anti-error type high tension switchgear |
| CN204304453U (en) * | 2014-12-28 | 2015-04-29 | 国网山东省电力公司日照供电公司 | A kind of interlock protection structure of water-cooling type SVG equipment |
| JP2016157588A (en) * | 2015-02-24 | 2016-09-01 | 株式会社ノーリツ | Fuel battery power generation system |
| CN204706818U (en) * | 2015-06-18 | 2015-10-14 | 国网安徽省电力公司培训中心 | A kind of high-tension switch cabinet switching-off device |
| CN205141497U (en) * | 2015-11-17 | 2016-04-06 | 江苏省水利勘测设计研究院有限公司 | Commutation isolated wheelbarrow |
| CN107086667A (en) * | 2017-06-08 | 2017-08-22 | 国电大渡河流域水电开发有限公司 | A kind of outlet breaker closing circuit structure and its method of work |
Non-Patent Citations (2)
| Title |
|---|
| 10KV开关站设备与运行;蒋丽娟;《中国优秀硕士学位论文全文数据工程科技Ⅱ辑》;20110715;全文 * |
| research and design of high-voltage electronic power equipment monitor system based on wireless communication technology;Yu Chen等;《Power and Energy Engineering Conference》;20090512;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107680332A (en) | 2018-02-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107680332B (en) | Warning device for preventing misoperation of high-voltage switch cabinet | |
| CN106712017B (en) | Double-bus secondary voltage switching circuit and self-holding circuit thereof | |
| CN209803293U (en) | Circuit breaker closing and opening control circuit broken wire monitoring and alarming circuit | |
| CN112599370A (en) | Rail transit safety interlocking device | |
| US2709249A (en) | Instrument units for process alarm systems | |
| US2730702A (en) | Alarm system | |
| CN205724449U (en) | A kind of intelligent switchboard | |
| CN115258860A (en) | Elevator maintenance box capable of prompting entering of elevator maintenance space safety | |
| CN211046028U (en) | PT parallel control system and power distribution device | |
| CN211239074U (en) | Intelligent display system for operating state of switch cabinet | |
| CN208316103U (en) | Anti-misoperation power supply box | |
| CN210090981U (en) | Change-over switch state monitoring device of fire control electrical control cabinet | |
| CN105742983A (en) | Intelligent switch cabinet | |
| CN209056099U (en) | Line combined floodgate power transmission body-sensing device with ground | |
| TWI621147B (en) | Combined capacitor trip device with signal transmission function | |
| CN216134100U (en) | Control system for circuit breaker to display real-time state on site | |
| CN210326697U (en) | Medium-voltage distribution line state indicating system | |
| CN107222024B (en) | Marine power distribution system switch interlocking device and control method thereof | |
| CN210780084U (en) | Simple central signal circuit and device | |
| CN214541002U (en) | Cubical switchboard alarm device and cubical switchboard | |
| CN215642995U (en) | Novel high-voltage power-off remote automatic alarm device | |
| CN215007025U (en) | Intelligent simulation system for communication alternating current/direct current power supply | |
| CN205582192U (en) | State suggestion device and equipment | |
| CN215120277U (en) | Central signal circuit and central signal screen | |
| CN212781130U (en) | Feedback circuit with equipment running state under multi-line control state |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |