CN210489505U - Safety high-voltage isolating switch - Google Patents
Safety high-voltage isolating switch Download PDFInfo
- Publication number
- CN210489505U CN210489505U CN201921919533.4U CN201921919533U CN210489505U CN 210489505 U CN210489505 U CN 210489505U CN 201921919533 U CN201921919533 U CN 201921919533U CN 210489505 U CN210489505 U CN 210489505U
- Authority
- CN
- China
- Prior art keywords
- contact
- subassembly
- driving
- auxiliary
- assembly
- 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
Landscapes
- Switch Cases, Indication, And Locking (AREA)
Abstract
The utility model provides a safe type high voltage isolator, sets up the electrically conductive vice contact of a vertical removal in the below of first contact subassembly and second contact subassembly, drives vice contact rebound and both ends switch on first contact subassembly and second contact subassembly respectively through a vertical drive arrangement, isolator still includes: the temperature detection module, the comparison module, the OR logic circuit and the alarm module are coupled with the OR logic circuit and used for receiving the early warning signal and outputting the alarm signal when receiving the early warning signal. The shunt protection of the contact finger assembly is realized through the auxiliary contact, and meanwhile, when the auxiliary contact is connected with the contact point of the first contact assembly and the second contact assembly and the position of the contact finger assembly generates heat, an alarm signal can be timely output through the alarm module, so that the warning effect is achieved, and the reliability of equipment operation is improved.
Description
Technical Field
The invention relates to the technical field of isolating switches, in particular to a safety high-voltage isolating switch.
Background
The high-voltage isolating switch is an important switching device in electric systems of power plants and transformer substations, needs to be matched with a high-voltage circuit breaker for use, and has the main functions of: the safety of the high-voltage electrical appliance and the device during maintenance work is ensured, the voltage isolation function is realized, the load current and the cut-off short-circuit current cannot be used, and the high-voltage electrical appliance and the device can only be used for certain switching operation without generating strong electric arcs.
Most of the contacts of the existing disconnecting switch adopt self-operated sheet-shaped contact fingers which are respectively arranged at two sides of the contacts, for example, the contact of the disconnecting switch disclosed by the utility model with the publication number of CN204537926U has the static contact fingers which are respectively arranged at two sides of a movable contact component, thereby forming the contact of the disconnecting switch. However, the contact point of the sheet-shaped contact finger needs to be radially centered and adjusted, and the adjustment error of the contact point can cause the contact force imbalance of the contact finger, and in severe cases, the contact finger is in single-side point contact, which affects the contact effect. The problems can not be exposed when new equipment is put into operation, but when the isolating switch runs in a severe environment for a long time or the closing operation is too much, the contact part of the contact finger and the contact head can be heated, and when the contact part is heated for a long time, the running reliability of the equipment can be reduced, and even the contact part of the contact head can be damaged.
Disclosure of Invention
The invention aims to provide a safety high-voltage isolating switch which can warn the heating of an isolating switch contact on the basis of reducing the influence of unbalanced contact force of a contact finger and the contact on the operation reliability of equipment.
The above object of the present invention is achieved by the following technical solutions:
a safety high-voltage isolating switch comprises a mounting seat, two rotating shafts arranged on the mounting seat and main insulating magnetic pieces respectively positioned on the two rotating shafts, wherein the two main insulating magnetic pieces are respectively provided with a fixing component, the two fixing components are respectively and fixedly connected with a first contact component and a second contact component which are mutually matched, the end part of the first contact component, which faces to the second contact component, is provided with a contact finger component for clamping the second contact component, the mounting seat is provided with a rotation driving device for driving the first contact component and the second contact component to rotate, a vertically moving conductive auxiliary contact is arranged below the first contact component and the second contact component, a vertical driving device for driving the auxiliary contact to vertically move is arranged below the auxiliary contact, when the first contact component and the second contact component are connected, the vertical driving device drives the auxiliary contact to move upwards, and the two ends of the vertical driving device are respectively communicated with the first contact component and the second contact component, the isolating switch further comprises:
the temperature detection module is fixedly arranged on the mounting seat, corresponds to the contact point of the auxiliary contact, which is connected with the first contact assembly and the second contact assembly, and the contact finger assemblies one by one, and is used for detecting the temperature of the contact point of the auxiliary contact, which is connected with the first contact assembly and the second contact assembly, and the temperature of the contact finger assemblies and respectively outputting temperature detection signals;
the comparison modules correspond to the temperature detection modules one to one, are coupled to the temperature detection modules and are used for receiving temperature detection signals, and when the temperature detection signals are larger than a preset temperature value, the comparison modules output comparison signals;
the OR logic circuit is coupled with the comparison modules and used for receiving the comparison signals and outputting early warning signals when receiving the comparison signals output by any one of the comparison modules;
and the alarm module is coupled with the OR logic circuit and used for receiving the early warning signal and outputting the alarm signal when receiving the early warning signal.
By adopting the technical scheme, due to the arrangement of the auxiliary contacts, when the first contact assembly is connected with the second contact assembly, the connection mode of connecting the first contact assembly with the second contact assembly through the auxiliary contacts can be additionally increased. In isolator daily use, the reposition of redundant personnel protection to touching the finger subassembly is realized to vice contact of accessible, when touching the finger subassembly and appearing the uneven situation of contact force, the electric current passes through vice contact to reduce and touch the probability that the finger subassembly contact position generates heat, thereby reduce by touching the finger and the unbalanced influence to equipment operational reliability of contact force of contact. Meanwhile, when the auxiliary contact is connected with the contact point of the first contact assembly and the second contact assembly and the position of the contact finger assembly generates heat, an alarm signal can be timely output through the alarm module, and therefore the warning effect is achieved. Compare in current isolator, this application has increased the quantity of contact position to and current circulation route, when single contact position generates heat, another current circulation route of accessible switched on current, and in time send alarm signal, avoid the position of generating heat to last the circulation heavy current, and when causing the contact position short time burn out, can also play the effect of in time suggestion staff, further improvement the reliability of equipment operation.
As the utility model discloses an improvement, temperature detection module sets up to non-contact temperature sensor.
By adopting the technical scheme, the temperature detection module is set as the non-contact temperature sensor, so that the temperature detection module can be prevented from directly contacting with a contact position, and the normal operation of the temperature detection module is ensured.
As the utility model discloses an improve, still include wireless transmission module, wireless transmission module is coupled or the supervisory equipment in logic circuit and the wireless connection control room, be used for with early warning signal transmits to supervisory equipment.
Through adopting above-mentioned technical scheme, wireless transmission module's setting has realized the remote monitoring to isolator, when taking place the overheated phenomenon in contact position, can make the staff in the control room in time receive early warning signal.
As the utility model discloses an improvement, vice contact is whole to be the arc platelike of buckling downwards, and vice contact both ends all buckle downwards form with the contact jaw that first contact subassembly and second contact subassembly are connected.
By adopting the technical scheme, when the vertical driving device vertically drives the auxiliary contact to move upwards, as the whole auxiliary contact is in an arc-plate shape, the contact ends at the two ends of the auxiliary contact are firstly contacted with the first contact assembly and the second contact assembly, so that the first contact assembly and the second contact assembly are communicated.
As an improvement of the utility model, the contact jaw is composed of a plurality of auxiliary contact fingers arranged side by side, and a gap is arranged between the adjacent auxiliary contact fingers.
By adopting the technical scheme, the contact end is composed of the plurality of auxiliary contact fingers, so that the elastic deformation capacity of the contact end is enhanced, and the unstable contact condition of the two contact ends with the first contact assembly and the second contact assembly is avoided.
As an improvement of the present invention, the first contact assembly and the second contact assembly are provided with a protective cover above the position where the auxiliary contacts are connected.
Through adopting above-mentioned technical scheme, the setting of protective cover has played the effect to the contact protection, places bad weather such as sleet and forms the erosion to the contact.
As the improvement of the utility model, vice contact below fixedly connected with a pair insulating magnetic member, the bottom of vice insulating magnetic member is connected vertical drive arrangement.
Through adopting above-mentioned technical scheme, the setting of vice insulating magnetic member can prevent that the electric current that flows through vice contact from flowing to ground through vertical drive arrangement to isolator's security has been improved.
As the utility model discloses an improvement, vertical drive arrangement is in including fixed setting fixed pipe on the mount pad and the drive shaft that passes fixed pipe, fixed pipe is located the position of vice insulating magnetism spare below be provided with the drive tube of fixed pipe intercommunication, a vertical actuating lever of vice insulating magnetism spare bottom fixedly connected with, the actuating lever is worn to locate the drive tube and is connected with the drive tube slides, the position that the drive shaft is close to the drive tube is provided with the arc driving groove that supplies the actuating lever to remove, a drive shaft one end fixedly connected with driving handle, the drive shaft drives the vertical removal of actuating lever through arc driving groove when the drive shaft rotates.
Through adopting above-mentioned technical scheme, when the height of vice contact is adjusted to needs, through the rotatory drive shaft of drive handle to make actuating lever bottom slide along drive tank bottom and drive shaft global, in order to realize the regulation to the actuating lever height, and then realize the regulation to vice contact height.
In conclusion, the beneficial technical effects of the invention are as follows:
the shunt protection of the contact finger assembly is realized due to the arrangement of the auxiliary contact, when the contact force of the contact finger assembly is unbalanced, the probability that the contact position of the contact finger assembly generates heat to damage the isolating switch is reduced, and the service life of the isolating switch is prolonged.
Drawings
Fig. 1 is a front view of a disconnector;
FIG. 2 is a schematic view of a secondary contact configuration;
FIG. 3 is a schematic view of a vertical drive arrangement;
FIG. 4 is a top view of the isolator switch;
FIG. 5 is a system diagram of a temperature early warning system;
fig. 6 is a circuit diagram of a temperature early warning system.
In the figure, 1, a mounting seat; 11. a fixed seat; 111. a fixed block; 12. a rotating shaft; 13. a main insulated magnetic member; 14. a fixing assembly; 15. a first contact assembly; 16. a second contact assembly; 17. a protective cover; 2. a secondary contact; 21. a contact end; 22. a secondary finger; 3. a secondary insulated magnetic member; 31. a drive rod; 4. a vertical drive device; 41. a fixed tube; 42. a drive shaft; 421. a drive handle; 422. an arc-shaped driving groove; 43. a drive tube; 5. a rotation driving device; 51. fixing the rod; 52. a linkage rod; 53. a slide bar; 531. a deflector rod; 54. a drive plate; 55. rotating the handle; 56. a support rod.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the safety high-voltage isolating switch disclosed by the invention comprises a strip-shaped mounting base 1, rotating shafts 12 arranged at two ends of the mounting base 1, and main insulating magnetic pieces 13 respectively positioned on the rotating shafts 12, wherein fixing component 14 driving rods are respectively arranged on the two main insulating magnetic pieces 13, the two fixing component 14 driving rods are respectively and fixedly connected with a first contact component 15 and a second contact component 16 which are mutually matched, and a contact finger component clamped with the second contact component 16 is arranged at the end part of the first contact component 15 facing the second contact component 16. The connection modes of the rotating shaft 12, the main insulating magnetic part 13, the fixed assembly 14 and the driving rod of the first contact assembly 15 and the second contact assembly 16 are common structures in the prior art, and are not described again.
Referring to fig. 1 and 2, a vertically moving conductive auxiliary contact 2 is arranged below the first contact assembly 15 and the second contact assembly 16, the conductive auxiliary contact 2 is integrally in the shape of an arc plate bent downwards, two ends of the auxiliary contact 2 are bent downwards to form a contact end 21 connected with the first contact assembly 15 and the second contact assembly 16, the contact end 21 is composed of a plurality of auxiliary contact fingers 22 arranged side by side, and a gap is arranged between every two adjacent auxiliary contact fingers 22. When the first contact assembly 15 and the second contact assembly 16 are connected, the auxiliary contact 2 is moved upwards, so that the contact ends 21 at the two ends of the auxiliary contact 2 are respectively abutted to the lower surfaces of the first contact assembly 15 and the second contact assembly 16, and the connection between the first contact assembly 15 and the second contact assembly 16 is additionally increased, thereby realizing the shunt protection of the contact finger assembly.
In order to avoid unstable connection of the secondary contact 2 with the first contact assembly 15 and the second contact assembly 16 due to environmental factors, protective covers 17 are arranged above the connection positions of the first contact assembly 15 and the second contact assembly 16 and the secondary contact 2. The protection height is a circular metal cover body and completely covers the right upper part of the contact end 21 of the secondary contact 2.
Referring to fig. 1 and 3, a vertical driving device 4 driving the secondary contact 2 to vertically move is provided below the secondary contact 2. Vertical drive device 4 passes fixed pipe 41's drive shaft 42 including fixed pipe 41 and the level that sets up on mount pad 1, and fixed pipe 41 is located the position of vice contact 2 below and is provided with the driving tube 43 with fixed pipe 41 intercommunication, wears to be equipped with a actuating lever 31 in the driving tube 43, and a pair of insulating magnetic member 3 of actuating lever 31 top fixedly connected with, the vice contact 2 of bolt fixed connection is passed through on vice insulating magnetic member 3 top. Wherein, the position that drive shaft 42 is close to drive tube 43 is provided with the arc drive groove 422 that supplies actuating lever 31 to remove, and drive shaft 42 one end fixedly connected with one driving handle 421, when rotating driving handle 421, can drive driving shaft 42 and rotate for actuating lever 31 bottom is followed the peripheral slip of arc drive groove 422 diapire and driving shaft 42, in order to realize the regulation to actuating lever 31 height, and then realizes the altitude mixture control to vice contact 2.
As shown in fig. 1 and fig. 4, a rotation driving device 5 for driving the first contact assembly 15 and the second contact assembly 16 to rotate is disposed on the mounting base 1, and the rotation driving device 5 includes a fixing rod 51 horizontally and fixedly connected to the bottom of the main insulating magnetic member 13, a linkage rod 52 with two ends respectively horizontally and rotatably connected to the two fixing rods 51, a driving plate 54 horizontally and fixedly connected to the bottom of the main insulating magnetic member 13, and a horizontally disposed rectangular sliding rod 53. Wherein, a vertical shift lever 531 is arranged on the sliding rod 53, a strip-shaped driving groove is arranged on the driving plate 54, and the shift lever 531 is arranged in the strip-shaped driving groove.
The fixing seat 11 is arranged at the bottom of the mounting seat 1, the fixing blocks 111 are arranged at two ends of one side of the fixing seat 11 in an extending mode, the sliding rod 53 horizontally penetrates through the two fixing blocks 111, the rotating handle 55 is hinged to one end of the sliding rod 53 horizontally, the supporting rod 56 is connected to the outer peripheral face of the rotating handle 55 in a horizontal rotating mode, and the supporting rod 56 is fixedly connected with the fixing blocks 111. When the end of the driving rotating handle 55 is rotated, the sliding rod 53 is driven to slide along the fixing block 111, so that the driving plate 54 is driven to rotate through the shift lever 531, and the main insulating magnetic member 13 is driven to rotate, thereby realizing the switching-on and switching-off operation of the disconnecting switch.
Further, the two fixing blocks 111 are both provided with rectangular holes, the sliding rod 53 passes through the rectangular holes, and the vertical sectional area of the rectangular holes is larger than that of the sliding rod 53.
Referring to fig. 1 and 5 drive tubes, the isolator also is provided with a temperature early warning system, which includes:
and the temperature detection module is fixedly arranged on the mounting seat 1, is in one-to-one correspondence with the contact points and the contact finger assemblies of the first contact assembly 15 and the second contact assembly 16 connected with the auxiliary contact 2, is used for detecting the temperatures of the contact points and the contact finger assemblies of the first contact assembly 15 and the second contact assembly 16 connected with the auxiliary contact 2, and respectively outputs temperature detection signals. The temperature detection module is set as an industrial non-contact temperature sensor, in the embodiment, the temperature sensor adopts an infrared temperature transmitter probe;
the comparison modules correspond to the temperature detection modules one to one, are coupled to the temperature detection modules and are used for receiving temperature detection signals, and when the temperature detection signals are larger than a preset temperature value, the comparison modules output comparison signals;
the OR logic circuit is coupled with the comparison modules and used for receiving the comparison signals and outputting early warning signals when receiving the comparison signals output by any one of the comparison modules;
the alarm module is coupled with the OR logic circuit and is used for receiving the early warning signal and outputting the alarm signal when receiving the early warning signal;
and the wireless transmission module is coupled with the logic circuit and is in wireless connection with the monitoring equipment in the control room, and is used for transmitting the early warning signal to the monitoring equipment.
The temperature warning of the position of the contact finger assembly is described as an example.
Referring to fig. 1 and 6, the output terminal of the temperature sensor for sensing the finger assembly is grounded through a reference resistor R1, the comparison module includes a comparator OA, a forward input terminal of the comparator OA is coupled to a node where the reference resistor R1 is connected to the temperature sensor, and a reverse input terminal of the comparator OA is connected to a reference circuit. The reference circuit comprises a fixed resistor R2 and a fixed resistor R3 which are connected in series with the power supply, wherein a node coupled with the fixed resistor R2 and the fixed resistor R3 is connected with the inverting input end of the comparator OA and outputs a reference signal corresponding to a preset temperature value. When the temperature detection signal output from the temperature sensor is greater than the reference signal, the output terminal of the comparator OA outputs a comparison signal.
The OR logic circuit is a three-input OR gate circuit, one of the input terminals of the OR logic circuit is connected with the output terminal of the comparator OA for receiving the comparison signal. And when the OR logic circuit receives the comparison signal, the early warning signal is output.
The alarm module comprises an NPN type triode Q2, the base level of the triode Q2 is connected with the output end of the logic circuit through a fixed resistor R9, and the node of the base level of the triode Q2, which is coupled with the fixed resistor R9, is grounded through a fixed resistor R10; the emitter of the triode Q2 is coupled with the negative pole of the power supply; the collector of the triode Q2 is connected with the positive pole of the power supply through an alarm device. The alarm device comprises an alarm lamp D2 and a buzzer BEE which are connected in parallel. When the OR logic circuit outputs the early warning signal, the triode Q2 is conducted, so that an audible and visual warning signal is output through the warning lamp D2 and the buzzer BEE.
As can be seen from the above, when the closing operation is required, the rotating handle 55 is first moved to connect the first contact assembly 15 and the second contact assembly 16 via the finger assembly, and then the driving handle 421 is moved to move the sub-contact 2 upward to connect the first contact assembly 15 and the second contact assembly 16. Due to the arrangement of the auxiliary contact 2, shunt protection of the contact finger assembly is achieved, and the service life of the isolating switch is prolonged. Meanwhile, due to the arrangement of the temperature early warning system, when the contact position generates heat, the temperature early warning system can output an alarm signal in time to prompt a worker to take corresponding measures, so that the situation that the heating position circulates large current for a long time to burn the equipment is avoided, and the running reliability of the isolating switch is improved.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (8)
1. The utility model provides a safe type high voltage isolator, includes mount pad (1), sets up two pivot (12) on mount pad (1) and is located main insulating magnetism spare (13) on two pivot (12) respectively, all is provided with fixed subassembly (14) on two main insulating magnetism spares (13), and two fixed subassemblies (14) are fixedly connected with first contact subassembly (15) and second contact subassembly (16) of mutually supporting respectively, first contact subassembly (15) are provided with the contact finger subassembly of joint second contact subassembly (16) towards the tip of second contact subassembly (16), be provided with first contact subassembly of drive (15) and second contact subassembly (16) pivoted rotation driving device (5), its characterized in that on mount pad (1): the below of first contact subassembly (15) and second contact subassembly (16) is provided with a vertical movement's electrically conductive vice contact (2), vice contact (2) below is provided with vertical drive arrangement (4) that drives vice contact (2) vertical movement, and when first contact subassembly (15) and second contact subassembly (16) meet, vertical drive arrangement (4) drive vice contact (2) rebound and both ends switch on first contact subassembly (15) and second contact subassembly (16) respectively, isolator still includes:
the temperature detection module is fixedly arranged on the mounting seat (1), is in one-to-one correspondence with contact points of the auxiliary contact (2) connected with the first contact assembly (15) and the second contact assembly (16) and the contact finger assemblies, is used for detecting the temperature of the contact points of the auxiliary contact (2) connected with the first contact assembly (15) and the second contact assembly (16) and the contact finger assemblies and respectively outputs temperature detection signals;
the comparison modules correspond to the temperature detection modules one to one, are coupled to the temperature detection modules and are used for receiving temperature detection signals, and when the temperature detection signals are larger than a preset temperature value, the comparison modules output comparison signals;
the OR logic circuit is coupled with the comparison modules and used for receiving the comparison signals and outputting early warning signals when receiving the comparison signals output by any one of the comparison modules;
and the alarm module is coupled with the OR logic circuit and used for receiving the early warning signal and outputting the alarm signal when receiving the early warning signal.
2. The safety high-voltage isolating switch according to claim 1, wherein: the temperature detection module is set as a non-contact temperature sensor.
3. The safety high-voltage isolating switch according to claim 1, wherein: the wireless transmission module is coupled with the logic circuit and is in wireless connection with the monitoring equipment in the control room, and the wireless transmission module is used for transmitting the early warning signal to the monitoring equipment.
4. The safety high-voltage isolating switch according to claim 1, wherein: the auxiliary contact (2) is integrally in the shape of an arc plate bent downwards, and two ends of the auxiliary contact (2) are bent downwards to form contact ends (21) connected with the first contact assembly (15) and the second contact assembly (16).
5. The safety high-voltage isolating switch according to claim 4, wherein: the contact end (21) is composed of a plurality of auxiliary contact fingers (22) arranged side by side, and a gap is formed between every two adjacent auxiliary contact fingers (22).
6. The safety high-voltage isolating switch according to claim 1, wherein: and protective covers (17) are arranged above the connecting positions of the first contact assembly (15) and the second contact assembly (16) and the auxiliary contacts (2).
7. The safety high-voltage isolating switch according to claim 1, wherein: a pair of insulating magnetic pieces (3) is fixedly connected below the auxiliary contact (2), and the bottom end of each auxiliary insulating magnetic piece (3) is connected with the vertical driving device (4).
8. The safety high-voltage isolating switch according to claim 7, wherein: the vertical driving device (4) comprises a fixed pipe (41) fixedly arranged on the mounting seat (1) and a driving shaft (42) penetrating through the fixed pipe (41), a driving pipe (43) communicated with the fixed pipe (41) is arranged at the position of the fixed pipe (41) below the auxiliary insulating magnetic piece (3), the bottom end of the auxiliary insulating magnetic part (3) is fixedly connected with a vertical driving rod (31), the driving rod (31) is arranged in the driving pipe (43) in a penetrating way and is connected with the driving pipe (43) in a sliding way, an arc-shaped driving groove (422) for the driving rod (31) to move is arranged at the position of the driving shaft (42) close to the driving pipe (43), one end of the driving shaft (42) is fixedly connected with a driving handle (421), when the driving shaft (42) rotates, the driving shaft (42) drives the driving rod (31) to vertically move through the arc-shaped driving groove (422).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921919533.4U CN210489505U (en) | 2019-11-07 | 2019-11-07 | Safety high-voltage isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921919533.4U CN210489505U (en) | 2019-11-07 | 2019-11-07 | Safety high-voltage isolating switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210489505U true CN210489505U (en) | 2020-05-08 |
Family
ID=70510688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921919533.4U Active CN210489505U (en) | 2019-11-07 | 2019-11-07 | Safety high-voltage isolating switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210489505U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114121543A (en) * | 2021-12-15 | 2022-03-01 | 河北奥斯特电力设备有限公司 | Isolating switch |
-
2019
- 2019-11-07 CN CN201921919533.4U patent/CN210489505U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114121543A (en) * | 2021-12-15 | 2022-03-01 | 河北奥斯特电力设备有限公司 | Isolating switch |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210489505U (en) | Safety high-voltage isolating switch | |
| CN103441508A (en) | Multipurpose low-voltage intelligent capacitor | |
| CN208751732U (en) | A kind of system for monitoring temperature of high voltage equipment | |
| CN213242320U (en) | Isolating switch electric interlocking loop fault positioning device | |
| CN219497700U (en) | Overload protection device for low-voltage circuit breaker | |
| CN111146036A (en) | Double-contact high-voltage isolating switch | |
| CN112713541A (en) | Coupling device for direct current load switch | |
| CN114530837B (en) | Electric power automation cubical switchboard | |
| CN105897082A (en) | Chassis/earthing switch control circuit of medium-voltage switch cabinet | |
| CN210111605U (en) | DC traction power supply system for eliminating residual voltage | |
| CN210427743U (en) | Device for monitoring state of isolating switch | |
| CN110401131B (en) | High-voltage isolation cabinet for small-capacity transformer substation | |
| CN102946096A (en) | Series damping resistor control method applied to arc suppression coil grounding system | |
| CN111668837A (en) | Bypass quick-opening switch and uninterrupted power operation method thereof | |
| CN110380399A (en) | A kind of DC traction power-supply system for eliminating residual voltage | |
| CN201069463Y (en) | Quick diagnosis instrument for power loss of low-voltage control line | |
| CN110544983A (en) | Motor drive switch equipment and monitoring device thereof | |
| CN114334537B (en) | Backup protector of gapless surge protector | |
| CN220525961U (en) | Reliability test auxiliary device for miniature circuit breaker | |
| CN204696793U (en) | A kind of duplicate supply control cabinet possessing anti-misoperation function | |
| CN212542222U (en) | Three-phase linkage mechanism switch on-off indicating device suitable for single-phase driving | |
| CN114038706B (en) | Intelligent isolation type quick breaker | |
| CN209516635U (en) | Silicon-controlled regulating switch reactive power compensator | |
| CN204348541U (en) | A kind of Acoustooptic indicator of outdoor AC high-voltage isolating switch combined floodgate degree | |
| CN216959307U (en) | Electric fire prevention current-limiting protector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |