33results about How to "Realize closing" patented technology

The invention discloses a two-way isolation switch and a GIS switchgear of using the same. The two-way isolation switch comprises a barrel, wherein the barrel comprises a shell and a telescopic joint; the shell and the telescopic joint are coaxially arranged at the rear side of the shell; a conductive rod assembly is arranged in the barrel and comprises a front moving contact block and a front moving contact; the front moving contact is arranged at the front end of the moving contact block in a guide motion manner; the conductive rod assembly comprises a rear moving contact block located at the rear side of the front moving contact block and a rear moving contact; the rear moving contact is arranged at the rear end of the rear moving contact block in a guide motion manner; the front side of the shell is connected with a first basin-type insulator; the rear side of the telescopic joint is connected with a second basin-type insulator; the first basin-type insulator is provided with a front fixed contact; and the second basin-type insulator is provided with a rear fixed contact. The two-way isolation switch is used for the GIS, so that the target of two-way isolation can be achieved, the two-way isolation switch can play a role in being dismantled from the position to maintain the GIS, a transition barrel in the prior art is replaced with the isolation switch and the two-way isolation switch is convenient to dismantle.

The invention relates to an automatic reclosing device of a prepayment circuit breaker. The automatic reclosing device comprises a shell, a transmission mechanism, an intelligent control circuit board and an electromagnetic trip mechanism, wherein the transmission mechanism comprises a positive and negative rotation motor, a worm, a speed reduction gear assembly and a clutch assembly, the speed reduction gear assembly comprises a first speed reduction gear, a second speed reduction gear, a third speed reduction gear and a fourth speed reduction gear, the clutch assembly comprises a clutch shaft and a clutch half gear, a breaking Hall sensor and a closing Hall sensor are respectively arranged at parts, corresponding to a motion curve of the clutch shaft, on the intelligent control circuit board, a first magnet is arranged on a positioning block of the clutch shaft and is matched with the breaking Hall sensor and the closing Hall sensor, a motor control Hall sensor is arranged at a position, corresponding to the fourth speed reduction gear, on the intelligent control circuit board, and two second magnets are respectively arranged on the fourth speed reduction gear and are matched with the motor control Hall sensor. The automatic reclosing device has the advantages of compact structure, long service lifetime, safety and reliability.

The invention belongs to a vacuum switch of a basic electrical unit device, an operation mechanism of the vacuum switch includes a spring operation mechanism and a permanent magnetic operation mechanism. The invention combines advantages of a spring operation mechanism and a permanent magnetic operation mechanism in a current technic, designs a vacuum switch with double operation mechanisms comprising a fucntion of the spring operation mechanism and a fucntion of the permanent magnetic operation mechanism. When a permanent magnetic controller has a fault, gate closing can be realized by manual energy storage conveniently.

The invention discloses an operation module for a small-sized air switch. The operation module comprises a circuit breaker handle, a releasing part, a first gear, a second gear and a third gear, wherein the first gear is a fan-shaped partial gear, and the angle of the fan-shaped partial teeth is 90 degrees; the inner ends of the first gear and the circuit breaker handle are both arranged in a first rotating shaft in a sleeving manner; the second gear is a coaxial gear, and consists of a rack wheel and a pinion; the pinion is a fan-shaped partial gear and provided with a lug boss; the pinion is meshed with the first gear; and the lug boss on the pinion can support a lug boss on the releasing part in a jacking manner in the rotating process. According to the operation module, a set of motor and gear driving mechanism is adopted, so that the operation module can realize a closing operation and an opening operation as well; the motor only needs to rotate in a single direction; the opening operation is implemented by adopting a drive gear to realize release in the interior of the switch, and dependence on the handle is prevented; the circuit breaker is not damaged even if a user has a misoperation on the handle to result in closing after the opening operation; and the operation module is simple and reliable in structure, reliable in action, small in size, relatively low in cost and capable of saving space.

The invention discloses an anti-rollover device for a ship and a wing plate retracting and spreading device for the anti-rollover device. The anti-rollover device for the ship comprises a ship body, wherein wing plates are arranged on two sides of the ship body respectively and movably connected with the ship body. Under the conditions of stormy waves, or ship instability and the like, the wing plates can be spread, and left-and-right bumping and shaking and rollover of the ship body are effectively avoided under the buoyancy action of the wing plates. The anti-rollover device for the ship can be equipped with the wing plate retracting and spreading device, by means of the wing plate retracting and spreading device, retraction, spread and lock of the wing plates can be realized, the operation is convenient and fast, and safety and reliability are achieved.

The invention relates to the technical field of high-voltage power transmission, and discloses a control device of a high-voltage switch. The control device comprises a dust-proof box and further comprises a driving mechanism mounted at the bottom of an inner cavity of the dust-proof box; a positioning mechanism mounted at the right end of the rear side of the inner cavity of the dust-proof box; three opening and closing mechanisms mounted on the upper surface of the dust-proof box at equal intervals from left to right; and a protection mechanism mounted on the right side wall of the dust-proof box. The rotating shaft has a self-locking function, prevents a high-voltage circuit breaker from being restarted due to misoperation, avoids damage to related equipment or electric shock of personnel, is high in safety, can realize double sealing of a moving contact area, is stable in sealing performance, can prevent leakage from occurring in the high-voltage circuit breaker, and further enables the high-voltage circuit breaker to maintain good flame retardant performance. The arc extinguishing performance is ensured, fire disasters are avoided, and the service life is prolonged.

The invention relates to the field of power supply facilities, and particularly discloses an automatic opening and closing high-voltage drop-out circuit breaker. A transmission gear is driven by a motor, and the transmission gear and a poke rod respectively drive a transmission wheel to move left and right and rotate through a transmission part; the rotation of a screw rod enables a first pawl anda second pawl to move downwards, a second return spring is extruded, and the accumulated force is released after the first pawl is separated from the first pawl; a guide rod is rapidly upward, and alink pipe is driven to rotate through a guide column and a rotating rod to be closed; after an electromagnet is powered on, a telescopic rod on the electromagnet retracts, and a pull rod drives a sleeve to move downwards, so that a moving contact is separated from a static contact, the link pipe falls down to open. According to the invention, the forward and reverse rotation motor and the electromagnet are controlled manually or remotely, so that the opening and closing purpose is realized through a series of mechanical actions, inconvenience caused by over-high fuse and uneven terrain is avoided, and unsafe factors generated in rainy days are also avoided.

The invention provides a tripping mechanism and a surge protector adopting the tripping mechanism. A first driving mechanism is erected on a guide bracket, and the first driving mechanism comprises aturning plate, wherein the turning plate is hinged with the guide bracket, a movable contact part is in transmission connection with the turning plate, and the turning plate is in transmission connection with a tripping part. The surge protector comprises at least one tripping mechanism and further comprises a lightning protection element, a signal detection device and a micro-control unit, and the tripping mechanism is connected to a circuit where the lightning protection element is located in series. According to the scheme, the tripping mechanism is simple and reliable in structure and quick in response; the sensitivity, reliability and stability of switching-on and switching-off actions are obviously improved; the repeated closing and releasing can be realized; the surge protector is simple in structure and convenient to use, improves the use efficiency, has a manual tripping function, meets the requirements of no tripping when lightning current or surge current impact occurs and rapid and accurate tripping when power frequency current, short-circuit current or overload current occurs, improves the reliability and safety of the surge protector, prolongs the service life of thesurge protector, and ensures the safety of a low-voltage distribution line.

The invention belongs to the technical field of power switch devices, and particularly relates to a grounding switch transmission mechanism which comprises a substrate, a transmission device and a locking device. The transmission device is arranged on the substrate and in transmission connection with a grounding output rotating shaft and drives the grounding output rotating shaft to rotate forwards and backwards under the action of an energy storage spring, so that a grounding switch is opened and closed, and forward and backward rotation of a separation rotating shaft drives the energy storage spring. When the grounding switch is in an opening state, opening of the grounding switch is locked by locking the transmission device. When the grounding switch is in a closing state, closing of the grounding switch is locked by locking the transmission device. The grounding switch transmission mechanism is simple in structure, and opening and closing positions of the switch can be locked.

The invention discloses a circuit breaker of an integrated electric operating mechanism. The circuit breaker comprises a shell, fixed contacts are fixedly connected in the shell, moving contacts movably connected with the fixed contacts are rotatably connected to the shell, and a remote switch on and switch off mechanism for controlling contacting or separation of the fixed contacts and the movingcontacts is arranged in the shell. After a user is owed, the fixed contacts can be separated from the moving contacts through the remote switch on and switch off mechanism to achieve the power outagepurpose, and meanwhile the fixed contacts can make contact with the moving contacts through the remote switch on and switch off mechanism.

The invention provides a ring main unit three-location isolation operation mechanism. The operation mechanism comprises a front panel, a rear panel, an output shaft module, an energy storage spring module, an isolation operation shaft module, a grounding operation shaft module and an operation hole baffle plate; a holding cavity is arranged between the front panel and the rear panel in parallel; the output shaft module, the isolation operation shaft module and the grounding operation shaft module penetrates through the holding cavity; the isolation operation shaft module an the grounding operation shaft module are arranged at two sides of the output shaft module; the isolation operation shaft module and the grounding operation shaft module are in transmission connection through the outputshaft module; the energy storage spring module is connected between the isolation operation shaft module and the grounding operation shaft module; and the operation hole baffle plate is arranged at the top of the output shaft module. The isolation, the ground switch-on and switch-off processes are accomplished through the spring energy storing release effect, and the performance of the isolationswitch is more stable and reliable.

The invention provides an interrupter assembly and a porcelain knob-type sulphur hexafluoride circuit breaker. The interrupter assembly comprises more than two interrupter monomers; each interrupter monomer comprises a moving support arranged at the head end and a static support arranged at the tail end; a moving contact is assembled in a guiding and sliding mode on the moving support; the static support is fixedly provided with a static contact coaxially opposite to the moving contact; the interrupter monomers are in end-to-end serial connection on the same axis; the moving contact of one interrupter monomer of each adjacent two interrupter monomers is in transmission connection with an insulated connection piece in transmission connection with the moving contact of the other interrupter monomer; and the static support at the tail end of the former interrupter monomer of each adjacent two interrupter monomers is in conductive connection with the moving support of the other interrupter monomer connected onto the tail end of the interrupter monomer. Synchronous opening and closing can be carried out when the interrupter assembly is used, and the voltage grade borne by the interrupter of the circuit breaker can be greatly improved.

The invention relates to the field of power supply facilities, and particularly discloses an automatic opening and closing high-voltage drop circuit breaker. It drives the transmission gear through the motor, and the transmission gear and the toggle lever respectively drive the transmission wheel to move left and right and rotate through the transmission parts; the rotation of the screw makes the first pawl and the second pawl move downward, and the second return spring is squeezed , after the first pawl is separated from the first pawl, the accumulated force is released, and the guide rod moves upwards quickly, and the gram tube is driven to rotate through the guide post and the rotating rod to realize closing; after the electromagnet is energized, the telescopic When the rod is retracted, the pull rod drives the sleeve downward, so that the moving contact is separated from the static contact, and the gram tube falls to realize the brake breaking. The invention uses manual or remote control to control the forward and reverse motors and electromagnets, so as to achieve the purpose of opening and closing through a series of mechanical actions, avoiding the inconvenience caused by excessive fuses and uneven terrain, and also avoiding rainy days. unsafe factors.

The invention provides a plug connector switching method for a mechanical characteristic test of a 10KV circuit breaker. A switching control module (9) of a test instrument, an output end interface (10) and an input end interface (8), wherein the output end interface (10) and the input end interface (8) are connected with the switching control module (9); the output end interface comprises an aviation male plug (11); a circuit board (902) of the switching control module is provided with a plurality of switch units connected with pins of the aviation male plug in a one-to-one correspondence manner; when a mechanical characteristic test is carried out on the 10KV circuit breaker, the aviation male plug is in butt joint with an aviation female plug of the 10KV circuit breaker, and the switching control module switches the on-off state of the switching tube according to a set switching strategy, so that the pin definition of the aviation male plug is matched with a current test item; the device can be easily butted with an aviation female plug of the circuit breaker, operation by professionals is not needed, and test time and labor cost can be saved; and meanwhile, correct wiring is realized, wrong wiring is avoided, and the safety of a person, a circuit breaker and a mechanical characteristic instrument is further ensured.

The invention relates to a vacuum circuit breaker type ring main unit, comprising a cabinet body, wherein a load switch and an earthing switch are arranged in the cabinet body, and a circuit breaker and a current transformer are connected in sequence between the load switch and the earthing switch; and the top part of the cabinet body is fixed with a secondary compartment. The vacuum circuit breaker type ring main unit is provided with the circuit breaker in the cabinet body, when a fault current occurs in the line, the circuit breaker automatically cuts off to protect the equipment, and the switching on of the circuit breaker can be realized remotely, thereby realizing the distribution network automation; and the top part of the cabinet body is provided with the secondary compartment, and a circuit breaker cabinet and an isolation cabinet can be assembled into one cabinet, thereby reducing commissioning cost of the equipment.

The invention discloses a multi-functional operation device for drawers of novel complete equipment. The operation device is characterized in that a positioning plate is sleeve at the front end of a movable rotating shaft on a rack, and connected with a rotary table for mounting a swing link through a connecting rod; the movable rotating shaft extends into a hollow core at the front end of a circuit breaker control shaft; a circuit breaker control shaft rotary table is arranged at the front end of the circuit breaker control shaft; a spring is sleeved on the circuit breaker control shaft; a driving pin of the movable rotating shaft extends into a shaft sleeve of the positioning plate, a shaft hole in the inner wall of the rack and a locating slot in a hollow wall at the front end of the circuit breaker control shaft; positioning grooves are uniformly distributed on the circumference of the positing plate and the circuit breaker control shaft; a locating plate spring is in interface contact with an external circumference of the positioning plate and the circuit breaker control shaft rotary table; and a protruded pin mounted on the rotary table is in contact with a microswitch. The device provided by the invention has the characteristics of novel structure, convenience in positioning and reliability in control, and can reduce the occupation of measurement and control board space of a drawer unit, expand use functions of the drawer unit, and realize single-step operation of a single handle.

The invention relates to an isolating switch with an arc extinguishing structure and a moving contact assembly of the isolating switch. A moving contact assembly of the disconnecting switch comprises a moving end support with a guide hole, a moving contact is assembled in the guide hole in a guiding mode, the moving contact is provided with an inserting part used for being matched with a static arc contact on a static end assembly in an inserting mode, the rear end of the moving end support is provided with a blocking structure, and the blocking structure blocks the rear end of the guide hole so as to form a piston cavity together with the guide hole; the moving contact is in sliding sealing fit with the piston cavity to form a piston, and an airflow channel which is communicated with the inserting part and penetrates backwards is formed in the position, behind the inserting part, of the moving contact and used for enabling an opening of the inserting part to form suction airflow when the moving contact is switched on and form exhaust airflow when the moving contact is switched off. The arc is blown by suction air flow and exhaust air flow. Therefore, the electric arc between the moving contact and the static end assembly is rapidly extinguished, and the arc extinguishing capability of the isolation switch with the arc extinguishing structure in the bus switching current switching process is improved.

The invention relates to an isolation grounding switch and an operating mechanism thereof. The operating mechanism of the isolation grounding switch comprises an A-phase driving shaft, a B-phase driving shaft and a C-phase driving shaft which are arranged side by side; an A-phase driving wheel is mounted on the A-phase driving shaft, a B-phase driving wheel is mounted on the B-phase driving shaft, and a C-phase driving wheel is mounted on the C-phase driving shaft; the A-phase driving wheel, the B-phase driving wheel and the C-phase driving wheel are in transmission connection to realize synchronous rotation; a driving device is in transmission connection with one of the A-phase driving shaft, the B-phase driving shaft and the C-phase driving shaft; three clutches are also arranged between the A-phase driving wheel and the A-phase driving shaft, between the B-phase driving wheel and the B-phase driving shaft and between the C-phase driving wheel and the C-phase driving shaft respectively. The maintenance of the transformer or other equipment of the fault phase is realized under the condition of uninterruptible power supply, the user experience is improved, and meanwhile, the economic loss is also reduced.

The invention relates to the technical field of power systems, in particular to a temperature-measuring outdoor high-voltage enclosed isolating switch with switching-on indication and assistance. The switch includes a base, insulators, an incoming line contact box, an outgoing line contact box and a movable contact knife, wherein one ends of the two insulators are symmetrically arranged at the two ends of the upper surface of the base, the lower ends of the incoming line contact box and the outgoing line contact box are fixed to the upper ends of the insulators respectively, and the movable contact knife is hinged to the outer side of the outgoing line contact box. When the movable contact knife is in a closed state, the movable contact knife is in close contact with static contacts arranged in the incoming line contact box and the outgoing line contact box, and wiring terminals are arranged on one side face of the incoming line contact box and one side face of the outgoing line contact box respectively. The invention aims to solve the problems that virtual closing and false closing are easy to occur when a disconnecting switch in the prior art is switched on to cause heating of a contact part, and the temperature of the contact part is difficult to measure, so that the maintenance difficulty of operation and maintenance personnel is increased.

The embodiment of the utility model provides an operating device and a change-over switch, relate to low voltage electrical apparatus technical field. Operating device includes support, main shaft, first drive connecting rod mechanism, second drive connecting rod mechanism and linkage, main shaft has first installation department and second installation department of relative setting, first drive connecting rod mechanism includes first electromagnet, first closing lever, first upper connecting rod, first lower connecting rod and first energy storage elastic part, first upper connecting rod, first lower connecting rod and first installation department are hinged in proper order, second drive connecting rod mechanism includes second electromagnet, second closing lever, second upper connecting rod, second lower connecting rod and second energy storage elastic part, second upper connecting rod, second lower connecting rod and second installation department are hinged in proper order, linkage is slidably arranged in first support and second support simultaneously, and both ends of linkage are hinged with first closing lever and second closing lever respectively. The structure of the operating device is simple, can improve assembly efficiency, and reduce manufacturing cost.

The invention relates to a device and a method for testing ablation resistance of a moving arc contact. The device comprises a driving device used for driving moving arc contact and static arc contact to be disconnected and connected in an uncharged mode, a temperature control device used for simulating the temperature of the moving arc contact during current breaking, and a detection device used for detecting at least one of the inner diameter of the moving arc contact before and after the moving arc contact is closed, the closing bounce time during closing and the closing resistance. In different switching-on temperature with the same switching-on speed, at least one of the inner diameters of the moving arc contact before and after closing of the moving arc contact, the closing bouncetime during closing and the closing resistance is detected and analyzed. According to the technical scheme, the ablation resistance of the moving arc contact can be tested, the ablation resistance ofthe moving arc contacts of different types is compared, the ablation resistance of the moving arc contacts of various types is evaluated, and compared with the mode that the moving arc contacts are installed on a sulfur hexafluoride circuit breaker for ablation resistance testing, the cost is low.

The invention discloses an indoor high-voltage grounding switch capable of warning in place. The indoor high-voltage grounding switch comprises a base, static contacts, movable contacts, insulators, rotation shafts and half-I-shaped sliding rail supports, wherein the rotation shafts are connected to the base, the half-I-shaped sliding rail supports are fixedly sleeved on the rotation shafts, a lower gear sliding rail is formed in each boss part and faces a direction of each insulator, the bottom of each movable contact is connected with the half-I-shaped sliding rail support by an upper gear sliding block and moves upwards and downwards, a gear sliding strip structure is arranged at a position, corresponding to the upper gear sliding block, in the half-I-shaped sliding rail support, a front end of the upper gear sliding block is connected with a lower sliding block through a pull rod and moves forwards and backwards in the lower gear sliding rail, a point contact type in-place switch is also arranged at a position of a top part of the movable contact, a top part of the point contact type in-place switch is connected with an indication lamp, and the indication lamp is connected with a position of a top part of the static contact. The indoor high-voltage grounding switch stably moves upwards and downwards within a travelling range, and has relatively good stability and reliability.

The invention discloses high-concentration desulfurization organic pharmaceutical wastewater treatment equipment. The structure includes a filter device, a filter chamber, a connecting pipe, a base, and a treatment chamber. The filter device is installed in the filter chamber, and the filter chamber communicates with the connecting pipe. Connected with the treatment chamber, the beneficial effect of the present invention is that through the counterclockwise rotation of the main shaft, the filter screen originally at the bottom of the waste water inlet pipe is rotated to be displaced, and the next filter screen is rotated to the bottom of the waste water inlet pipe to realize the replacement of the filter screen. When the rotating shaft rotates clockwise, the fixed block rotates with the linkage rod and acts on the center point of the connecting block, so that the driving rod is driven in the direction in which the first spring contracts, so that the driving rod is driven in in the direction in which the first spring contracts, and Push and pull the connecting rope with the help of the protruding rod to recess inward at a certain angle to realize the closing of the two movable rods, so that the resistance between the fixed block and the connecting block loses the interlocking resistance, and the purpose of the filter screen falling off from the filter screen mounting frame is achieved.

The application relates to the technical field of circuit breakers, and provides a circuit breaker structure which comprises an arc-extinguishing chamber framework, a plurality of vacuum arc-extinguishing chambers, a plurality of opening and closing assemblies and a driving shaft; the arc-extinguishing chamber framework is provided with a plurality of installation grooves along the length direction of the arc-extinguishing chamber framework, and an insulating cavity is arranged above the arc-extinguishing chamber framework at each installation groove; each vacuum arc-extinguishing chamber is arranged in each installation groove; the opening and closing assembly comprises an arc-preventing support and a connecting piece; the arc-preventing support comprises a body and two limiting plates; the body is arranged in the insulating cavity, and the two sides of the body abut against the inner side walls of the insulating cavity; the two limiting plates are rotationally connected to the two sides of the body respectively; the connecting piece is arranged between the two limiting plates and the vacuum arc-extinguishing chamber, so as to realize the opening and closing of the vacuum arc-extinguishing chamber; and the driving shaft is connected with the limiting plates. Based on the above, the occupied space of the arc-preventing support can be reduced. In addition, an environment-friendly gas cabinet is also provided.

The invention belongs to the technical field of power-off equipment of a power system, and particularly relates to a primary and secondary deep integrated circuit breaker, which comprises a circuit breaker shell, and a shell door is arranged on a rectangular opening in the front end of the circuit breaker shell; the vacuum bubble is arranged at the top of the circuit breaker shell; a movable iron core of the permanent magnetic mechanism is connected with an electrode pull rod of the vacuum bubble, and a closing coil and an opening coil of the permanent magnetic mechanism are connected in series; the control protection piece is fixed on the bottom plate of the circuit breaker shell and controls the permanent magnetic mechanism movable iron core to move; and the capacitor charger is fixed on the bottom plate of the circuit breaker shell. According to the invention, a control part for protecting and controlling the permanent magnetic mechanism by the microcomputer is arranged in the shell of the circuit breaker, a large box body does not need to be independently arranged, and the permanent magnetic mechanism can be controlled to be normally used only by a small control box, so that the operation and the use are convenient, and the cost is saved.

The invention discloses a two-way isolation switch and a GIS switchgear of using the same. The two-way isolation switch comprises a barrel, wherein the barrel comprises a shell and a telescopic joint; the shell and the telescopic joint are coaxially arranged at the rear side of the shell; a conductive rod assembly is arranged in the barrel and comprises a front moving contact block and a front moving contact; the front moving contact is arranged at the front end of the moving contact block in a guide motion manner; the conductive rod assembly comprises a rear moving contact block located at the rear side of the front moving contact block and a rear moving contact; the rear moving contact is arranged at the rear end of the rear moving contact block in a guide motion manner; the front side of the shell is connected with a first basin-type insulator; the rear side of the telescopic joint is connected with a second basin-type insulator; the first basin-type insulator is provided with a front fixed contact; and the second basin-type insulator is provided with a rear fixed contact. The two-way isolation switch is used for the GIS, so that the target of two-way isolation can be achieved, the two-way isolation switch can play a role in being dismantled from the position to maintain the GIS, a transition barrel in the prior art is replaced with the isolation switch and the two-way isolation switch is convenient to dismantle.

The invention provides a circuit breaker. The circuit breaker comprises a housing, a contact system, a transmission system, a release system, a driving motor and an operation handle. The transmission system comprises a driving member, a transmission member, a first transmission member and a second transmission member, wherein a second elastic member is arranged between the second transmission member and the housing, a first elastic member is arranged between the first transmission member and the housing. The release system comprises a release shaft, and the first transmission member is provided with a trigger portion abutting against the release shaft; when a user is in default, the driving motor drives the first transmission member to press against the release shaft, and the contact system is open; and when the user pays a fee, the driving motor continues to rotate, the release shaft is no longer pressed, the first transmission member turns around under the elastic force effect of the first elastic member, and the contact system is driven to be closed through the second transmission member. Therefore, before the user pays an electricity bill, even if an operation handle is manually turned to be closed, since the release system is at a trigger state, the operation handle is automatically reset to an opening position, and the user cannot draw power by himself.