CN114122931A - Safety control device for safety test of electrical switch cabinet - Google Patents

Safety control device for safety test of electrical switch cabinet Download PDF

Info

Publication number
CN114122931A
CN114122931A CN202111414531.1A CN202111414531A CN114122931A CN 114122931 A CN114122931 A CN 114122931A CN 202111414531 A CN202111414531 A CN 202111414531A CN 114122931 A CN114122931 A CN 114122931A
Authority
CN
China
Prior art keywords
safety
driving
state
gear
power transmission
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.)
Granted
Application number
CN202111414531.1A
Other languages
Chinese (zh)
Other versions
CN114122931B (en
Inventor
张淼
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Shunkai Electrical Equipment Co ltd
Original Assignee
Shandong Shunkai Electrical Equipment Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shandong Shunkai Electrical Equipment Co ltd filed Critical Shandong Shunkai Electrical Equipment Co ltd
Priority to CN202111414531.1A priority Critical patent/CN114122931B/en
Publication of CN114122931A publication Critical patent/CN114122931A/en
Application granted granted Critical
Publication of CN114122931B publication Critical patent/CN114122931B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • H02B1/24—Circuit arrangements for boards or switchyards
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58—Testing of lines, cables or conductors
    • 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
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
    • 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
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
    • H02B1/32—Mounting of devices therein
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B15/00—Supervisory desks or panels for centralised control or display
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
    • H02K37/24—Structural association with auxiliary mechanical devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Trip Switchboards (AREA)

Abstract

The invention discloses a safety control device for a safety test of an electrical switch cabinet, and mainly relates to the field of electrical engineering. Comprises a shell and a stepping driving device; a circuit plugging device is arranged between the shell and the electrical cabinet and comprises a power transmission circuit connector, a system test connector, a power transmission circuit interface and a system test interface, wherein the power transmission circuit connector and the system test connector are arranged on the shell, and the power transmission circuit interface and the system test interface are arranged on the inner wall of a cabinet groove of the electrical cabinet in a sleeved mode; the stepping driving device drives the shell to realize stepping displacement relative to the electrical cabinet groove; the invention has the beneficial effects that: the power utilization safety of the operators can be guaranteed. When the circuit in the device is communicated, self-locking safety is achieved, the device is prevented from being pulled out or being operated in a charged mode, and the electricity utilization safety in a working state is guaranteed; the device can indicate the connection condition of a computer system circuit and a power transmission circuit, can accurately indicate the current connection state and connection point position of the device, and avoids the problem that a safety control device in a traditional mode is difficult to realize good control on the displacement between the whole device and a switch cabinet.

Description

Safety control device for safety test of electrical switch cabinet
Technical Field
The invention relates to the field of electrical engineering, in particular to a safety control device for a safety test of an electrical switch cabinet.
Background
The switch cabinet is an electrical device, the external line of the switch cabinet firstly enters a main control switch in the cabinet and then enters a branch control switch, and each branch is arranged according to the requirement. The main function of the switch cabinet is to open and close, control and protect electric equipment in the process of power generation, power transmission, power distribution and electric energy conversion of an electric power system. The components in the switch cabinet mainly comprise a circuit breaker, an isolating switch, a load switch, an operating mechanism, a mutual inductor, various protection devices and the like. The method is mainly suitable for various occasions such as power plants, transformer substations, petrochemical industry, metallurgical steel rolling, light industrial textile, industrial and mining enterprises, residential districts, high-rise buildings and the like.
The switch cabinet is integrally used as a centralized control power distribution center, and the power utilization safety of operators is required to be guaranteed when the switch cabinet is maintained, debugged and used. The cubical switchboard subdivides into independent control safety control device and carries out the independent control power supply to every unit when supplying power to the system, when needs overhaul or control scheme to independent circuit, need guarantee that safety control device can separate the circuit alone and ensure staff's safety of using electricity is in good care of the electric shock, the staff of being convenient for is to the maintenance and the maintenance of circuit, traditional mode's safety control device is difficult to realize good control to the displacement between the whole and the cubical switchboard of device, and then can't realize accurate control to the connection condition of circuit, very easily cause the danger of electric shock. Because the electrical components in the safety control device are easy to be separated from the safety control device when being manually pulled by a plurality of workers, the safety control device for the safety test of the electrical switch cabinet is needed.
Disclosure of Invention
The invention aims to provide a safety control device for a safety test of an electrical switch cabinet, which is used as a unit power distribution control center of the electrical switch cabinet and can ensure the power utilization safety of operators. The device can instruct the computer system circuit and the transmission circuit connection condition, can accurate indicating device current connection state and connection point position, and the staff of being convenient for uses the safety control device who has avoided traditional mode to different situation and is difficult to realize good control to the displacement between the whole device and the cubical switchboard, and then can't realize accurate control to the connection condition of circuit, very easily causes the danger of electrocuteeing.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a safety control device for a safety test of an electrical switch cabinet comprises a shell and a stepping driving device;
a circuit plugging device is arranged between the shell and the electrical cabinet and comprises a power transmission circuit connector, a system test connector, a power transmission circuit interface and a system test interface, wherein the power transmission circuit connector and the system test connector are arranged on the shell, and the power transmission circuit interface and the system test interface are arranged on the inner wall of a cabinet groove of the electrical cabinet in a sleeved mode;
the stepping driving device drives the shell to realize stepping displacement relative to the electrical cabinet groove;
the connection between the system test connector and the system test interface and the connection between the power transmission circuit connector and the power transmission circuit interface are sequentially and respectively controlled by controlling the moving distance of the stepping displacement.
The stepping mode of the stepping driving device is three-point two-section stepping displacement, and the connection state of the system test connector and the system test interface, the connection state of the power transmission circuit connector and the power transmission circuit interface and the complete disconnection state are controlled by different displacement distances of the three-point two-section stepping displacement;
the step driving device is a worm and gear transmission mechanism, and the worm and gear transmission mechanism comprises a driving worm arranged outside the shell and a worm female bar fixedly arranged in a groove of the electrical cabinet and matched with the driving worm; three-point two-section type stepping displacement is realized by rotating the driving worm and the worm rack.
The driving worm is arranged on the bottom surface of the shell, the worm-nut strip is correspondingly arranged on the bottom surface of the cabinet slot of the electrical cabinet, the driving worm is connected to a driving shaft, and the driving shaft is arranged in an installation groove body on the bottom surface of the shell;
the stepping driving device is provided with a state indicating device in a matching way; the state indicating means indicates different connection states by driving the rotational position of the worm.
The rotating shaft of the state indicating device is in transmission with the driving shaft in a gear transmission mode, and the state indicating device is driven to rotate by rotating the driving shaft through the gear transmission mechanism, so that the state indicating device displays a three-point connection state to indicate a connection state of a control system test connector and a system test interface, a connection state of a power transmission circuit connector and a power transmission circuit interface and a complete disconnection state;
the gear transmission mechanism comprises a driving gear, a duplicate gear and a driven gear; the driving gear is coaxially arranged on the driving shaft, the driven gear is coaxially arranged with the state indicating device, and the duplicate gear is respectively meshed with the driving gear and the driven gear; the driven gear limits the rotation angle for a residual gear, the state indicating device comprises an indicating disc, a state indicating block is arranged on the tooth surface of the driven gear, the state indicating block is provided with a groove which is adaptive to the three-point connection state, and an elastic part matched with the groove is arranged on the mounting groove body;
when the driving gear drives the driven gear to rotate through the duplicate gear, the elastic part enters the groove for limiting when the groove is contacted with the port of the elastic part, so that the corresponding state mark on the indicating disc displays the corresponding connecting state indicating point position.
The inner surface of the state indicating block is provided with a bulge, the installation groove body is provided with an elastic sheet, a travel switch and an indicating lamp circuit, the tail end of the elastic sheet is provided with a top post matched with the bulge, and the start position and the tail end of the travel switch are respectively and correspondingly connected with two indicating lamp circuits with different colors;
when the bulge on the surface of the state indicating block touches the top column to push the top column, the elastic sheet pushes the travel switch to displace, so that the connection state of indicating lamp circuits with different colors is changed, and the connection state of the system test connector and the system test interface, the connection state of the power transmission circuit connector and the power transmission circuit interface and the complete disconnection state are controlled by observing the color state and the on-off state of the indicating lamp.
The front end of the driving shaft is provided with a key hole, and the three-point connection state is controlled by screwing the driving shaft by a special key;
a circuit break protector for controlling the on-off of the circuit is arranged between the power transmission circuit connector and the power transmission circuit interface;
the safety protection device controls the working state of the circuit breaker, and the circuit breaker locks the shell in the electrical cabinet and locks the key hole at the same time in the switch-on state.
The safety protection device comprises a shifting piece driving long shaft and a shifting piece switch;
one end of the plectrum driving long shaft is connected with a knob switch, and the plectrum switch is matched with a circuit protection switch of the circuit breaker protector; the shifting piece driving long shaft and the shifting piece switch are in transmission through a gear and rack transmission mechanism;
the toggle knob switch and the shifting piece drive the long shaft to drive the shifting piece switch to translate in two directions through the gear rack transmission mechanism to control the on-off of the circuit protection switch;
the poking piece driving long shaft is provided with a rotating poking piece in a matching manner, the poking piece driving long shaft rotates to drive the rotating poking piece to rotate, the rotating poking piece is provided with an arc-shaped sliding long hole, the rotating poking piece is connected with a locking piece, and the locking piece slides in the sliding long hole in a limiting manner;
when the plectrum drive major axis drives and rotates the plectrum and rotate, the arc that rotates the plectrum slides slot hole top and promotes the lock plate downwards and moves down, and the lock plate bottom passes the casing bottom surface and then inserts the regulator cubicle tank bottom surface and realizes locking with it matched with locked groove.
The safety protection device also comprises a movable safety locking plate and a vertical plate; the vertical plate is provided with a first obtuse angle chute and a bottom chute, the movable safety locking plate is provided with a second obtuse angle chute opposite to the first obtuse angle chute in direction, the locking sheet is in limited relative sliding connection with the first obtuse angle chute and the second obtuse angle chute through a short shaft, and the bottom of the movable safety locking plate is in limited sliding connection with the bottom chute through the short shaft;
the movable safety locking plate is also connected with an L-shaped closing plate, a transverse plate of the L-shaped closing plate is provided with a safety hole, and the safety hole is matched with a key hole at the front end of the driving shaft; the transverse plate of the L-shaped closing plate on the movable safety locking plate slides in two directions to control the alignment state of the safety hole and the key hole at the front end of the driving shaft.
And a computer system control element is arranged in the shell and is connected with the control system joint. The shell is provided with a switch door, and the switch door is provided with a handle, an indicating display lamp arranged on an indicating lamp circuit and a display screen connected with a computer system control element.
Compared with the prior art, the invention has the beneficial effects that:
1. the device is used as a unit power distribution control center of the electrical switch cabinet, and can ensure the power utilization safety of operators. When the circuit in the device is communicated, self-locking safety is achieved, the device is prevented from being pulled out or being operated in a charged mode, and the electricity utilization safety in a working state is guaranteed; the device can indicate the connection condition of a computer system circuit and a power transmission circuit, can accurately indicate the current connection state and connection point positions of the device, and is convenient for workers to use according to different conditions, so that the safety control device in a traditional mode is prevented from being difficult to realize good control on the displacement between the whole device and a switch cabinet.
2. The state indicating device that the device set up can accurately indicate computer system circuit and transmission circuit connection condition, and through the pilot lamp that pilot disc and travel switch are connected, the state that the zone that the pilot disc corresponds the instruction and the pilot lamp is connected can accurately reflect the position of device, and then the connection status of feedback system test joint and system test interface, transmission circuit joint and transmission circuit interface, complete disconnection state.
3. The safety protection device through setting up makes can't remove the device only after the outage when the circuit communicates in the device, just can remove the device through special key, further improves the security of device, prevents that the maloperation from leading to electrocuteeing when electrified.
4. When the test point is located, the input circuit is disconnected, the controlled circuit is checked and controlled through a computer system panel, and the device does not need to be further opened to control from the inside.
Drawings
FIG. 1 is a general view of the apparatus of the present invention.
Fig. 2 is a view of the apparatus and electrical cabinet tank of the present invention.
Fig. 3 is a view of the step driving apparatus of the present invention.
Fig. 4 is a view showing the internal structure of the step driving device of the present invention.
Fig. 5 is a view of the safety protection device of the present invention.
Fig. 6 is a view of the safety protection device of the present invention.
Fig. 7 is a view of the safety protection device of the present invention.
Reference numerals shown in the drawings:
1. a housing; 2. a power transmission circuit connection; 3. a system test joint; 4. an electrical cabinet groove; 5. a drive worm; 6. a snail mother strip; 7. a drive shaft; 8. a driving gear; 9. a duplicate gear; 10. a driven gear; 11. A chute plate; 12. an indicating disc; 13. a status indication block; 14. a groove; 15. an elastic member; 16. a transverse plate; 17. a protrusion; 18. installing a groove body; 19. an elastic sheet; 20. a travel switch; 21. a top pillar; 22. a computer system control element; 23. a key hole; 24. a circuit break protector; 25. the shifting piece drives the long shaft; 26. a paddle switch; 27. a knob switch; 28. rotating the shifting sheet; 29. an arc-shaped sliding long hole; 30. a perforation; 31. a locking piece; 32. locking the groove; 33. a safety locking plate; 34. a vertical plate; 35. a first obtuse-angle chute; 36. a bottom chute; 37. a second obtuse-angle chute; 38. a first minor axis; 39. a second minor axis; 40. a sliding groove body; 41. A safety vent; 42. opening and closing the door; 43. a handle; 44. an indicator display light; 45. a display screen; 46. a switch drive gear; 47. and bending the mounting plate.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.
The invention relates to a safety control device for a safety test of an electrical switch cabinet, which comprises a main body structure, a shell body 1 and a stepping driving device, wherein the shell body is provided with a stepping motor;
a circuit plugging device is arranged between the shell 1 and the electrical cabinet and comprises a power transmission circuit connector 2, a system test connector 3, a power transmission circuit interface and a system test interface, wherein the power transmission circuit connector 2 and the system test connector are arranged on the shell 1, and the power transmission circuit interface and the system test interface are arranged on the inner wall of a cabinet groove 4 of the electrical cabinet in a sleeved mode; the stepping driving device drives the shell 1 to realize stepping displacement relative to the electrical cabinet groove 4; by controlling the moving distance of the stepping displacement, the connection between the system test connector 3 and the system test interface and the connection between the power transmission circuit connector 2 and the power transmission circuit interface are sequentially and respectively controlled.
The circuit plugging device is connected as shown in the attached figure 1 of the specification, two power transmission circuit connectors 2 of a shell 1 are provided, because the power transmission circuit connectors 2 of the shell 1 are firstly connected with a power input end in a cabinet groove 4 of an electric cabinet, after the power transmission circuit connectors 2 of the shell 1 are dotted, the power transmission circuit connectors are connected with a circuit breaking protector 24 through lines, so that the circuits are protected, and then the power input in the cabinet groove 4 of the electric cabinet is output through another line connection, so that the circuits correspondingly controlled by the device are connected with the power supply; the system test connector 3 is connected with a test interface arranged in the electrical cabinet groove 4, and the control circuit is adjusted to be opened and closed after being connected.
A step driving device:
according to the use requirement and safety consideration of the device, the stepping mode of the stepping driving device is three-point two-section stepping displacement, the three-point two-section mode refers to two displacement distances of three state point positions, namely connection, test and separation, and the two-section displacement represents the process of the connection state change of the power transmission circuit connector 2 and the power transmission circuit connector 2. The connection state of the system test connector 3 and the system test interface, the connection state of the power transmission circuit connector 2 and the power transmission circuit interface and the complete disconnection state are controlled by different displacement distances of three-point two-stage stepping displacement.
The connection states indicated by the connection point positions are that the power transmission circuit connector 2 is connected with the power transmission circuit interface, and the system test connector 3 is connected with the system test interface; the test sites are: the system test connector 3 is connected with the system test interface, and the power transmission circuit connector 2 is disconnected with the power transmission circuit interface; the separation point position is: the power transmission circuit connector 2 is connected with the power transmission circuit interface, and the system test connector 3 is disconnected with the system test interface. The three-point one-state point position and the two-section stepping displacement are realized by the following specific structure.
The specific structure of the stepping driving device is as follows:
the step driving device is a worm and gear transmission mechanism, and the worm and gear transmission mechanism comprises a driving worm 5 arranged outside the shell 1 and a worm-nut strip 6 fixedly arranged in the electrical cabinet groove 4 and matched with the driving worm 5; three-point two-section type stepping displacement is realized by rotating the driving worm 5 and the worm strip 6. The driving worm 5 is arranged on the bottom surface of the shell 1, the worm mother strip 6 is correspondingly arranged on the bottom surface of the cabinet groove 4 of the electrical cabinet, the driving worm 5 is connected to the driving shaft 7, and the driving shaft 7 is arranged in the installation groove body 18 on the bottom surface of the shell 1; the driving worm 5 and the worm rack 6 are in meshing transmission through rotating the driving shaft 7, so that relative displacement is generated between the shell 1 and the electrical cabinet groove.
The stepping driving device is provided with a state indicating device in a matching way; the status indicating means indicates a "three point" status by driving the rotational position of the worm as described below.
A state indicating device:
the rotating shaft of the state indicating device is in transmission with the driving shaft 7 in the stepping driving device in a gear transmission mode, and the state indicating device is driven to rotate by rotating the driving shaft 7 through the gear transmission mechanism, so that the state indicating device displays a three-point connection state to indicate the connection state of the control system test connector 3 and the system test interface, the connection state of the power transmission circuit connector 2 and the power transmission circuit interface and a complete disconnection state.
The specific structure of the state indicating device transmission mechanism is as follows:
the gear transmission mechanism comprises a driving gear 8, a duplicate gear 9 and a driven gear 10 as shown in the attached figure 3 of the specification; the double gear 9 is: two coaxial gears separated by a certain distance are integrated into a whole to form a dual gear 9. The driving gear 8 is coaxially arranged on the driving shaft 7, and the driven gear 10 is coaxially arranged with the state indicating device, so that the meshing transmission mechanism and the state indicating mechanism arranged on the driven shaft are connected to achieve synchronization; the duplicate gear 9 is respectively meshed with the driving gear 8 and the driven gear 10; the driven gear 10 limits the rotation angle of the meshed duplicate gear 9 and the driving gear 8 by the residual gear.
The purpose of the driven gear 10 being a stub gear is two: the first is that the connection of the system test circuit and the circuit is a process of orderly connection, the driven gear is meshed with the driving gear 8 for transmission and limiting so as to limit the maximum displacement stroke of the driving shaft 7 of the stepping driving device, and the system test connector 3 and the power transmission circuit connector 2 are prevented from still moving after the plugging is finished, so that negative influences are generated on the circuit connection and the durability; the second is the cooperation is described below with driven shaft connected's instruction disc 12, if driven gear 10 does not carry on spacingly to driving gear 8, instruction disc 12 indicating position can take place the confusion, for example after casing 1 puts into regulator cubicle cabinet groove 4, the process of instruction position by separation-experiment-connection, driving gear 8 is driven by drive shaft 7 and continues the rotation after lacking spacing, the connection position can rotate to separation position point indicator from connecting the indicating point, can follow separation position to experimental position knowledge point after continuing to rotate, lead to instructing disc 12 indicating position to take place the confusion, so driven gear 10 is for the stub gear to carry on spacingly to rotation angle. The angles of the driven gear 10 and the transmission ratio of the gear transmission mechanism are matched with corresponding proportions between the indicating disc 12 and the groove 14 arranged on the state indicating block 13 which are described below.
The specific structure of the state indicating device is as follows:
the status indicating device as shown in figure 4 of the attached drawings of the specification comprises an indicating disc 12, wherein the status indicating disc 12 is provided with indicating areas corresponding to three status point positions, and the indicating areas form an angle with each other. The state indicating disc 12 is connected with a gear shaft of the driven gear 10, the rotating angle of the state indicating disc 12 is consistent with the rotating angle of the driven gear 10 after connection, the driven gear 10 and the driving gear 8 are in meshed transmission, so that the effect of indicating the advancing distance of the stepping driving device is achieved, when the stepping driving device is driven, the displacement process and the state of advancing of the shell 1 can be seen more conveniently and more visually, and therefore the connection condition of the system testing connector 3 and the system testing interface and the connection condition of the power transmission circuit connector 2 and the power transmission circuit interface can be fed back.
Further improvement:
a tooth surface of the driven gear 10 is provided with a state indicating block 13, the state indicating block 13 is provided with a groove 14 which is adapted to the three-point connection state, the position of the groove 14 corresponds to the disc, and the mounting groove body 18 is provided with an elastic part 15 which is matched with the groove 14; the matching relation is as shown in the attached figure 5 of the specification, when the driving gear 8 drives the driven gear 10 to rotate through the dual gear 9, and the groove 14 is contacted with the port of the elastic part 15, the elastic part 15 enters the groove 14 to slide in a limiting way, so that the corresponding state mark on the indicating disc 12 displays the corresponding connecting state indicating point position. In connection with the key hole 23 provided at the front end of the drive shaft 7 described later, in consideration of the need for a dedicated key for driving, if only the indicating disk 12 is provided, the indicating disk 12 needs to be always seen to operate when the drive shaft 7 is rotated by the dedicated key, and the point position cannot be clearly indicated. After improvement, when the special key drives the indicating disc 12 to rotate to a three-point state through the gear transmission mechanism, the elastic piece 15 enters the groove 14 to slide in a limiting way, obvious insensitive and audible sound is achieved, and the position of the next state point can be known through rotation.
Further improvement:
the specific structure is as shown in fig. 5 of the attached drawings of the specification, a protrusion 17 is arranged on the inner surface of the state indicating block 13, an elastic sheet 19, a travel switch 20 and an indicating lamp circuit are arranged on the installation groove 18, a top post 21 matched with the protrusion 17 is arranged at the tail end of the elastic sheet 19, and the start position and the tail end of the travel switch 20 are respectively and correspondingly connected with two indicating lamp circuits with different colors; the travel switch 20 is to use the collision of the mechanical motion part to make the contact of the mechanical motion part act to connect or disconnect the control circuit, so as to achieve the purpose of connecting the control circuit.
When the protrusion 17 on the rotating surface of the status indication block 13 touches the top post 21 to push the top post 21, the top post 21 pushes the elastic piece 19 to displace the contact of the travel switch 20, thereby changing the communication status of the indicator light circuit with different colors.
For example: just after the whole device is placed in an electrical cabinet, the circuit of the whole device is not switched on, an indicator lamp is in an off state, the shell 1 gradually enters the electrical cabinet by rotating the driving shaft 7, when the test connector 3 of the control system is connected with a system test interface, meanwhile, the bulge 17 on the rotating surface of the state indicating block 13 is in contact with the top column 21 to push the top column 21, the top column 21 pushes the elastic sheet 19 to enable the contact of the travel switch 20 to displace, and the indicator lamp shows yellow to indicate that the current point position is in a test point position; and the driving shaft 7 is continuously rotated, the protrusion 17 on the rotating surface of the state indicating block 13 is separated along with the gear transmission, the top column 21 retracts to the travel switch 20, the contact retracts, and the state indicating lamp displays green to indicate that the current point position is at the connection point position.
Therefore, the three-point connection state, namely the connection state of the control system test connector 3 and the system test interface, the connection state of the power transmission circuit connector 2 and the power transmission circuit interface and the complete disconnection state can be represented by observing the color state and the on-off state of the indicator lamp.
The safety protection device is further improved from the safety point of view:
the front end of the driving shaft 7 is provided with the key hole 23, so that the driving shaft 7 can be conveniently and manually screwed through a special key to control the three-point connection state, the use safety of the device and the electricity utilization safety of the device are improved, the device is prevented from being opened by others at will to cause danger, the driving shaft 7 can be screwed through the special key under manual control to be high in use flexibility, and the use state can be mastered according to requirements when the device is reused. In combination with the above-mentioned groove 14 and the elastic member 15 of the status indicator block 13, it is more convenient to find the point of the "three-point" status.
According to the use characteristics of the electrical cabinet, a protection device is required to be arranged on the circuit for connecting and controlling the circuit, and a circuit breaking protector 24 for controlling the on-off of the circuit is arranged between the power transmission circuit connector 2 and a power transmission circuit interface. The molded case circuit breaker can automatically cut off the current after the current exceeds the trip setting. Plastic housing refers to the use of plastic insulators as the outer housing of the device to isolate the conductors from each other and from the grounded metal parts.
The key hole 23 is connected with a safety protection device, which is used for controlling the working state of the circuit breaker 24, so that the working state of the circuit breaker 24 is controlled by a knob switch 27 arranged below to be communicated with a circuit in the control device outside the shell 1, and the circuit breaker 24 locks the shell 1 in an electrical cabinet and locks the key hole 23 in the on state, so that the three-point state can be adjusted only after the circuit in the shell 1 is disconnected for safety.
The safety protection device has the specific structure that:
as shown in fig. 6 of the attached drawings, the safety protection device comprises a shifting block driving long shaft 25 and a shifting block switch 26; one end of the plectrum driving long shaft 25 is connected with a knob switch 27, the knob switch 27 is arranged on a switch door 42 which is described below, and the plectrum switch 26 is matched with a circuit protection switch of the circuit breaker 24; the transmission between the shifting piece driving long shaft 25 and the shifting piece switch 26 is realized through a gear and rack transmission mechanism; the toggle knob switch 27 and the shifting piece driving long shaft 25 drive the shifting piece switch 26 to move in two directions through the gear rack transmission mechanism to control the on and off of the circuit protection switch; thereby achieving control of communication of the circuit inside the housing 1 from outside the housing 1.
The gear rack transmission mechanism comprises a switch driving gear 46 and a sliding groove body 40 through the gear rack transmission mechanism as shown in figure 7 of the attached drawings of the specification; the concrete structure is as follows: the tail end of the shifting sheet driving long shaft 25 is provided with a switch driving gear 46; the circuit breaker protector 24 is further provided with a bending mounting plate 47, the mounting plate is provided with a chute plate 11, a sliding groove body 40 is arranged in the chute plate 11 in a matching manner, a plectrum switch 26 is arranged in the sliding groove body 40, and a plurality of tooth holes 30 are arranged in the sliding groove body 40; the tooth hole 30 is matched with a switch driving gear 46 arranged at the tail end of the driving long shaft, so that the sliding groove body 40 can slide in two directions under the action of the switch driving gear 46.
When the knob switch is shifted clockwise, the coaxial transmission of drive major axis is connected with shifting knob switch, it is rotatory to drive switch drive gear 46, the tooth of drive gear meshes the transmission with the perforation 30 that sets up in the sliding groove body 40, make sliding groove body 40 slide in the sliding groove, and then drive the switch that the plectrum switch 26 that sets up on the sliding groove body 40 opened circuit breaker 24, make the inside circuit intercommunication of device, realized the inside circuit of 1 external control device from the casing, the security performance when further having improved the device and using.
The whole locking device and the locking keyhole 23 are further improved when the circuit is communicated by safety consideration:
the overall specific structure of the locking device when the circuit is communicated is as follows: the shifting piece driving long shaft 25 is provided with a rotating shifting piece 28 in a matching manner, the shifting piece driving long shaft 25 rotates to drive the rotating shifting piece 28 to rotate, the rotating shifting piece 28 is provided with an arc-shaped sliding long hole 29, the rotating shifting piece 28 is connected with a locking piece 31, and the locking piece 31 slides in the sliding long hole in a limiting manner; when the poking piece drives the long shaft 25 to drive the rotating poking piece 28 to rotate clockwise, the working state of the circuit breaker protector 24 is opened, the circuit in the device is communicated, the top of the arc-shaped sliding long hole 29 of the rotating poking piece 28 pushes the locking piece 31 downwards to move downwards, and the bottom of the locking piece 31 penetrates through the bottom surface of the shell 1 and then is inserted into the bottom surface of the electric cabinet groove 4 to be locked with the locking groove 32 matched with the bottom surface of the electric cabinet groove. The long shaft 25 is driven by the poking piece to serve as a power source to drive the rotating poking piece 28 to rotate, the arc-shaped sliding long hole 29 of the rotating poking piece 28 enables the locking piece 31 to be inserted into the locking groove 32 in the bottom surface of the electrical cabinet groove 4, the whole device is locked with the electrical cabinet groove 4, and safety of the device is improved.
Further improve the structure:
in order to prevent that when the circular telegram, the protector 24 that breaks during operation key hole 23 can also insert the key, if the circuit internal leakage or the lamp position factor that breaks down lead to the staff to electrocute, in order to improve the electrical safety, the specific improved structure does: as shown in fig. 5 and 7 of the attached drawings of the specification, a first obtuse-angle chute 35 and a bottom chute 36 are arranged on the vertical plate 34, a second obtuse-angle chute 37 opposite to the first obtuse-angle chute 35 in direction is arranged on the movable safety locking plate 33, the locking piece 31 is in limited relative sliding connection with the first obtuse-angle chute 35 and the second obtuse-angle chute 37 through short shafts, and the bottom of the movable safety locking plate 33 is also in limited sliding connection with the bottom chute 36 through the short shafts. The movable safety locking plate 33 is also connected with an L-shaped closing plate, a transverse plate 16 of the L-shaped closing plate is provided with a safety hole 41, and the safety hole 41 is matched with a key hole 23 at the front end of the driving shaft 7; the bi-directional sliding displacement of the cross plate 16 of the L-shaped closure plate on the movable safety locking plate 33 controls the alignment of the safety aperture 41 with the keyway 23 at the forward end of the drive shaft 7.
The locking piece 31 is divided into a first short shaft 38 and a second short shaft 39 according to the arrangement sequence through the two short shafts, specifically, the rotating poking piece 28 is connected with the vertical plate 34 and the safety locking plate 33 through the connection of the figure 6 in the specification, so when the poking piece drives the long shaft 25 to drive the rotating poking piece 28 to rotate clockwise, the working state of the circuit breaker protector 24 is opened, the circuit in the device is communicated, the first short shaft 38 of the locking piece 31 slides in a limiting way in the sliding long hole of the rotating poking piece 28, and the second short shaft 39 of the locking piece 31 slides in a limiting way in the first obtuse angle sliding groove 35 and the second obtuse angle sliding groove 37, so that the short shaft of the safety locking piece 31 slides in a limiting way in the bottom sliding groove 36 of the vertical plate 34, the locking piece 31 and the L-shaped closing plate are displaced, and the position of the transverse plate 16 of the L-shaped closing plate aligned with the key hole 23 is changed to displace, and further achieve the purpose of locking the key hole 23, the safety performance of the device is improved.
Other elements:
a computer system control element 22 is arranged inside the shell 1 and is connected with a control system joint; the shell 1 is provided with a switch door 42, the switch door 42 is provided with a handle 43 for facilitating drawing and pulling during maintenance when a fault occurs in the shell 1, an indicating lamp 44 arranged on an indicating lamp circuit is connected with the travel switch 20, and a display screen 45 connected with the computer system control element 22. The computer system control element 22 is arranged to debug and change the controlled circuit at the test site, and the matching with the display screen 45 of the computer system can simply check the control circuit condition and change the control circuit connection condition through the keys arranged on the display screen 45.
The using method is detailed as follows:
the device with the turn-knob switch 27 in the closed state is integrally placed in an electrical cabinet groove 4, all plugs at a separation point are not connected at the moment, a driving worm 5 of the stepping driving device is meshed with a worm strip 6, a special key is inserted into a key hole 23, the special key is rotated to enable the driving shaft 7 to integrally move towards the interior of the electrical cabinet groove 4, a computer system test connector 3 is connected with a system test interface, an indication disc 12 correspondingly reaches a test point, a protrusion 17 arranged on a state indication block 13 pushes a push column and a shifting sheet to enable a circuit in a travel switch 20 to change, and a yellow indication lamp is turned on; after the system line is debugged, the special key is continuously rotated to enable the device to continuously move towards the electrical cabinet, the system test connector 3 is connected with the system test interface, the power transmission circuit connector 2 is connected with the power transmission circuit interface, the indicating disc 12 correspondingly reaches a connection point position, the protrusion 17 arranged on the state indicating block 13 rotates and pushes the column to return to the circuit in the travel switch 20 for changing, and the green indicating lamp is lightened to reach the connection point position.
In conclusion, this device can ensure operating personnel's power consumption safety as the unit distribution control center of electrical switchgear. When the circuit in the device is communicated, self-locking safety is achieved, the device is prevented from being pulled out or being operated in a charged mode, and the electricity utilization safety in a working state is guaranteed; when the circuit in the device is communicated, the device cannot be moved and can be moved only by a special key after power failure, so that the safety of the device is further improved, and electric shock caused by misoperation in case of electrification is prevented; the device can instruct the computer system circuit and the transmission circuit connection condition, can accurate indicating device current connection state and connection point position, and the staff of being convenient for uses the safety control device who has avoided traditional mode to different situation and is difficult to realize good control to the displacement between the whole device and the cubical switchboard, and then can't realize accurate control to the connection condition of circuit, very easily causes the danger of electrocuteeing.

Claims (10)

1. The utility model provides a be used for electrical switchgear safety test safety control device which characterized in that: comprises a shell (1) and a stepping driving device;
a circuit plugging device is arranged between the shell (1) and the electric cabinet and comprises a power transmission circuit connector (2) arranged on the shell (1), a system test connector (3) and a power transmission circuit interface and a system test interface which are arranged on the inner wall of the cabinet groove (4) of the electric cabinet in a matching way;
the stepping driving device drives the shell (1) to realize stepping displacement relative to the electrical cabinet groove (4);
the connection between the system test connector (3) and the system test interface and the connection between the power transmission circuit connector (2) and the power transmission circuit interface are sequentially and respectively controlled by controlling the moving distance of the stepping displacement.
2. The safety control device for the safety test of the electrical switch cabinet according to claim 1, characterized in that: the stepping mode of the stepping driving device is three-point two-section stepping displacement, and the connection state of the system test connector (3) and the system test interface, the connection state of the power transmission circuit connector (2) and the power transmission circuit interface and the complete disconnection state are controlled by different displacement distances of the three-point two-section stepping displacement;
the step driving device is a worm and gear transmission mechanism, and the worm and gear transmission mechanism comprises a driving worm (5) arranged outside the shell (1) and a worm-and-gear strip (6) fixedly arranged in the cabinet groove (4) of the electrical cabinet and matched with the driving worm (5); three-point two-section type stepping displacement is realized by rotating the driving worm (5) and the worm strip (6).
3. The safety control device for the safety test of the electrical switch cabinet according to claim 2, characterized in that: the driving worm (5) is arranged on the bottom surface of the shell (1), the worm mother strip (6) is correspondingly arranged on the bottom surface of the cabinet groove (4) of the electric cabinet, the driving worm (5) is connected to the driving shaft (7), and the driving shaft (7) is arranged in the installation groove body (18) on the bottom surface of the shell (1);
the stepping driving device is provided with a state indicating device in a matching way; the state indicating means indicates different connection states by driving the rotational position of the worm.
4. The safety control device for the safety test of the electrical switch cabinet according to claim 3, characterized in that: the rotating shaft of the state indicating device is in transmission with the driving shaft (7) in a gear transmission mode, and the state indicating device is driven to rotate by rotating the driving shaft (7) through the gear transmission mechanism, so that the state indicating device displays a three-point connection state to indicate the connection state of the control system test connector (3) and the system test interface, the connection state of the power transmission circuit connector (2) and the power transmission circuit interface and a complete disconnection state;
the gear transmission mechanism comprises a driving gear (8), a duplicate gear (9) and a driven gear (10); the driving gear (8) is coaxially arranged on the driving shaft (7), the driven gear (10) is coaxially arranged with the state indicating device, and the duplicate gear (9) is respectively meshed with the driving gear (8) and the driven gear (10); the driven gear (10) limits the rotation angle for a residual gear, the state indicating device comprises an indicating disc (12), the tooth surface of the driven gear (10) is provided with a state indicating block (13), the state indicating block (13) is provided with a groove (14) which is adaptive to a three-point connection state, and an elastic part (15) which is matched with the groove (14) is arranged on the mounting groove body (18);
when the driving gear (8) drives the driven gear (10) to rotate through the duplicate gear (9), and the groove (14) is in contact with the port of the elastic piece (15), the elastic piece (15) enters the groove (14) for limiting, so that the corresponding state mark on the indicating disc (12) displays the corresponding connecting state indicating point position.
5. The safety control device for the safety test of the electrical switch cabinet according to claim 4, characterized in that: the inner surface of the state indicating block (13) is provided with a bulge (17), the installation groove body (18) is provided with an elastic sheet (19), a travel switch (20) and an indicating lamp circuit, the tail end of the elastic sheet (19) is provided with a top column (21) matched with the bulge (17), and the start position and the tail end of the travel switch (20) are respectively and correspondingly connected with two indicating lamp circuits with different colors;
when the bulge (17) on the surface of the state indicating block (13) touches the top column (21) to push the top column (21), the elastic sheet (19) pushes the travel switch (20) to displace, so that the connection state of indicating lamp circuits with different colors is changed, and the connection state of three points, namely the connection state of the control system test connector (3) and the system test interface, the connection state of the power transmission circuit connector (2) and the power transmission circuit interface and the complete disconnection state are represented by observing the color state and the on-off state of the indicating lamp.
6. The safety control device for the safety test of the electrical switch cabinet according to claim 5, characterized in that: the front end of the driving shaft (7) is provided with a key hole (23), and the three-point connection state is controlled by screwing the driving shaft (7) by a special key;
a circuit breaking protector (24) for controlling the on-off of the circuit is arranged between the power transmission circuit connector (2) and the power transmission circuit interface;
the safety protection device is connected with the key hole (23) and controls the working state of the circuit breaker protector (24), and the circuit breaker protector (24) locks the shell (1) in the electrical cabinet and locks the key hole (23) at the same time in the connection state.
7. The safety control device for the safety test of the electrical switch cabinet according to claim 6, characterized in that: the safety protection device comprises a shifting piece driving long shaft (25) and a shifting piece switch (26);
one end of the plectrum driving long shaft (25) is connected with a rotary knob switch (27), and the plectrum switch (26) is matched with a circuit protection switch of the circuit breaker protector (24); the plectrum drives the long axis (25) and the plectrum switch (26) to realize transmission through a gear rack transmission mechanism;
the toggle knob switch (27) and the shifting piece driving long shaft (25) drive the shifting piece switch (26) to move in two directions through the gear rack transmission mechanism to control the opening and closing of the circuit protection switch;
the poking piece driving long shaft (25) is provided with a rotating poking piece (28) in a matching manner, the poking piece driving long shaft (25) rotates to drive the rotating poking piece (28) to rotate, the rotating poking piece (28) is provided with an arc-shaped sliding long hole (29), the rotating poking piece (28) is connected with a locking piece (31), and the locking piece (31) slides in the sliding long hole in a limiting manner;
when the plectrum drive major axis (25) drives and rotates plectrum (28) and rotate, the arc that rotates plectrum (28) slides slot hole (29) top and pushes down locking piece (31) and move down, and locking piece (31) bottom is passed casing (1) bottom surface and then is inserted regulator cubicle cabinet groove (4) bottom surface and is realized locking with its matched with locked groove (32).
8. The safety control device for the safety test of the electrical switch cabinet according to claim 7, characterized in that: the safety protection device also comprises a movable safety locking plate (33) and a vertical plate (34); a first obtuse-angle sliding chute (35) and a bottom sliding chute (36) are arranged on the vertical plate (34), a second obtuse-angle sliding chute (37) opposite to the first obtuse-angle sliding chute (35) in direction is arranged on the movable safety locking plate (33), the locking sheet (31) is in limited relative sliding connection with the first obtuse-angle sliding chute (35) and the second obtuse-angle sliding chute (37) through short shafts, and the bottom of the movable safety locking plate (33) is in limited sliding connection with the bottom sliding chute (36) through the short shafts;
the movable safety locking plate (33) is further connected with an L-shaped closing plate, a transverse plate (16) of the L-shaped closing plate is provided with a safety hole (41), and the safety hole (41) is matched with a key hole (23) in the front end of the driving shaft (7);
the transverse plate (16) of the L-shaped closing plate on the movable safety locking plate (33) slides in two directions to control the alignment state of the safety hole (41) and the key hole (23) at the front end of the driving shaft (7).
9. The safety control device for the safety test of the electrical switch cabinet according to claim 1, characterized in that: a computer system control element (22) is arranged in the shell (1) and connected with a control system joint.
10. The safety control device for the safety test of the electrical switch cabinet according to claim 1, characterized in that: the shell (1) is provided with a switch door (42), and the switch door (42) is provided with a handle (43), an indicating display lamp (44) arranged on an indicating lamp circuit and a display screen (45) connected with a computer system control element (22).
CN202111414531.1A 2021-11-25 2021-11-25 Safety control device for safety test of electrical switch cabinet Active CN114122931B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111414531.1A CN114122931B (en) 2021-11-25 2021-11-25 Safety control device for safety test of electrical switch cabinet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111414531.1A CN114122931B (en) 2021-11-25 2021-11-25 Safety control device for safety test of electrical switch cabinet

Publications (2)

Publication Number Publication Date
CN114122931A true CN114122931A (en) 2022-03-01
CN114122931B CN114122931B (en) 2024-03-12

Family

ID=80373396

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111414531.1A Active CN114122931B (en) 2021-11-25 2021-11-25 Safety control device for safety test of electrical switch cabinet

Country Status (1)

Country Link
CN (1) CN114122931B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003111218A (en) * 2001-09-28 2003-04-11 Terasaki Electric Co Ltd Control center
KR100841528B1 (en) * 2007-02-28 2008-06-25 한국원자력연구원 Angular position detector using planetary gear and circumferential arranged reed switches and detecting method of control rod position using thereof
CN202167780U (en) * 2011-08-22 2012-03-14 新疆昆仑电气有限公司 Interlocking device for grounding switch operating mechanism of switch cabinet
CN109473871A (en) * 2018-04-09 2019-03-15 国家电网公司 A kind of high-tension switch cabinet earthing switch blade computer anti-misoperation and lockout device and method
CN212304448U (en) * 2020-04-08 2021-01-05 浙江裕欣电力科技有限公司 High low-voltage cabinet hand power for drawer switch interlocking device of security
CN212516960U (en) * 2020-07-22 2021-02-09 山西德力西电器有限公司 Emergency brake separating device of switch cabinet

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003111218A (en) * 2001-09-28 2003-04-11 Terasaki Electric Co Ltd Control center
KR100841528B1 (en) * 2007-02-28 2008-06-25 한국원자력연구원 Angular position detector using planetary gear and circumferential arranged reed switches and detecting method of control rod position using thereof
CN202167780U (en) * 2011-08-22 2012-03-14 新疆昆仑电气有限公司 Interlocking device for grounding switch operating mechanism of switch cabinet
CN109473871A (en) * 2018-04-09 2019-03-15 国家电网公司 A kind of high-tension switch cabinet earthing switch blade computer anti-misoperation and lockout device and method
CN212304448U (en) * 2020-04-08 2021-01-05 浙江裕欣电力科技有限公司 High low-voltage cabinet hand power for drawer switch interlocking device of security
CN212516960U (en) * 2020-07-22 2021-02-09 山西德力西电器有限公司 Emergency brake separating device of switch cabinet

Also Published As

Publication number Publication date
CN114122931B (en) 2024-03-12

Similar Documents

Publication Publication Date Title
KR200420968Y1 (en) Operating Device of the third -type Disconnecting Switch for a Gas Insulated Switchgear
CN105448552A (en) Operation device of isolation switch
CN114122931A (en) Safety control device for safety test of electrical switch cabinet
AU2020103232A4 (en) Alternate push mechanism for drawers
KR100703038B1 (en) Operation equipment for gas-insulated switch-gear
CN105006408A (en) Built-in explosion-proof breaker device
CN108832522A (en) Contact net online switchboard assembly
CN210668155U (en) Locking device of low-voltage switch cabinet
CN201075586Y (en) Low-voltage distribution operating controller
KR100785702B1 (en) Gas insulated switchgear
CN203233348U (en) Reversible magnetic starter for underground electric multi-rotary actuating mechanism in coal mine
KR200412844Y1 (en) Operation equipment for gas-insulated switch-gear
CN217010100U (en) Safety driving mechanism for safety control device of electrical cabinet
CN206432217U (en) A kind of safe switching-off device being used in switchgear
CN216489395U (en) Safety switch for electrical cabinet safety control device
CN111884066B (en) Switch cabinet with safety system
CN217010111U (en) Indication driving mechanism for electrical cabinet safety control device
CN104332349B (en) Intelligent pair of ground connection high voltage isolating switch operating mechanism case
CN204117936U (en) A kind of novel single ground connection high voltage isolating switch operating mechanism case
CN219420080U (en) Electric electricity-checking grounding handcart device
CN109148206B (en) A kind of dual operation hole tri-station isolating switch mechanism and its interlock
CN107508148B (en) Locking structure of transformer substation grounding wire
CN207676851U (en) A kind of disconnecting switch
CN217010099U (en) Indicating disc for safety control device of electrical cabinet
CN216485446U (en) Indicator lamp for electrical cabinet safety control device

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