31results about How to "Does not affect the protection function" patented technology

The invention provides a protective cover and an isolation switch equipped with the same, and belongs to the technical field of parts of an electric switch apparatus. The protective cover comprises a cover body, a threading port and a first operating port, wherein the cover body is suitable for being mounted on the base of the isolation switch and used for covering at least one contact base which is mounted on the base and used for connecting an inlet wire or an outlet wire; the threading port is formed in the cover body or between the cover body and the base, and used for allowing the inlet wire or the outlet wire to pass through; and the first operating port is formed in the cover body and used for allowing an operating tool to pass through to connect the inlet wire or the outlet wire on the contact base or remove the connection between the inlet wire and the contact base or between the outlet wire and the contact base. The protective cover provided by the invention is mounted on the base of the isolation switch, so that the contact base connected with the inlet wire or the outlet wire can be covered; and the first operating port is formed in the protective cover, the inlet wire or the outlet wire on the contact base can be connected and contacted without detaching the protective cover, so that wire connecting and wire detaching steps of the isolation switch can be simplified.

The invention provides a method for automatically resetting the grounding protection device of a small-current system, which has the function of automatically resetting. The method comprises the following steps: an intelligent controller of a microcomputer judges whether the small-current system is grounded and further judges the grounding phase if the system is grounded; when the system is subjected to a grounding fault, a switching-on instruction is given to a fault-phase circuit breaker, and the fault-phase circuit breaker is rapidly switched on; the fault phase is connected with a grounding grid via a low-impedance current-limiting reactor provided with a secondary coil; then, a system grounding current flowing through the primary coil of the low-impedance current-limiting reactor is detected by a zero-sequence current transformer, and a high-frequency voltage signal generator connected with the secondary coil of the low-impedance current-limiting reactor is put into operation, soa high-frequency voltage and a high-frequency current are injected into the fault phase of the system; the high-frequency impedance of the fault phase of the system can be calculated by the intelligent controller of the microcomputer, so as to obtain the grounding resistance of the faulted return circuit; and the grounding resistance thereof is further compared with that in the normal system to judge whether the grounding fault disappears, if so, an automatic resetting instruction is given, so as to switch off the fault-phase circuit breaker, thereby automatically resetting the device.

The invention discloses a protective net device for a vehicle, which comprises two lower fixing seats, a rotating seat is arranged at the center of the upper surface of the lower fixing seats, and a rotating rod is connected to the inner part of the rotating seat, and the rotating rod The inner surface of the rotating rod is fixedly connected with a baffle plate, the upper surface of the rotating rod is fixedly installed with an arc frame, and the inner center of the arc frame is fixedly connected with a reinforcing beam, and both sides of the reinforcing beam are fixedly installed with glass A cylindrical frame is fixedly connected to the inner center of the reinforcing beam, and a rotating cavity is arranged inside the cylindrical frame, and card seats are fixedly connected to both sides of the upper surface of the arc-shaped frame, and the inside of the card seat A T-shaped chute is provided, and the inside of the T-shaped chute is slidably connected with an upper fixing seat through a T-shaped slider. The automobile electronic anti-robbery net device is not only convenient for installation and use through the connection structure of the upper fixing seat and the lower fixing seat, but also can greatly improve the safety of people in the car.

The invention discloses a wind turbine multi-mode self-adaptive control method, device and computer storage medium. The steps of the method include: S1. Constructing a digital prototype model of the wind turbine; S2. Collecting the operating state data of the controlled wind turbine in real time; S3. Input the collected operating state data into the digital prototype model for comparison, and judge whether the controlled wind turbine is in normal operating state, if not, go to step S4; S4. Determine the control mode according to the comparison result to control the controlled wind turbine. The wind turbine is adjusted to a normal operating state; the device includes a prototype model building module, a data acquisition module, a state discrimination module and a multi-mode adaptive control module. The invention can realize the multi-mode self-adaptive control of the wind turbine, improve the reliability and stability of the operation of the wind turbine, and has the advantages of simple implementation method, low cost, high control efficiency and precision, and the like.

The present invention is anti-locking control method and system for magnetic suspension train, and on the basis of traditional magnetic suspension control device, one anti-locking control device comprising one predicting controller, one logic processing unit, one power tube state detector, etc is set. The predicting controller predicts the dynamic suspension gap on the running magnetic suspension train based on the signal from the displacement sensor of the suspension control device and sends command to the suspension control device according to the prediction result. Normally, the magnet current is real-time regulated for the magnet to keep certain suspension interval to the track; and in case predicted locking risk, the anti-locking control device requires the suspension control device to feed inverse current to the magnet so as to avoid locking the train onto the track.

Provided is a method for extracting an explosion-continuous short circuit signal. The method is characterized by utilizing the features of an instantaneous positive and negative pulse current which is produced at an explosion point during short circuiting, and thus extraction of the explosion point signal is realized; and combining a leakage protector to control short-circuit burning. Therefore, the short-circuit burning, which is caused for the reason that a short-circuit current is not large enough to enable an air short-circuit switch to trip, is performed an automatic circuit-breaking control, and electric fire cases can be reduced; the original leakage protector is combined, so that circuit control is simple and the cost is low; and thus the method is an ingeniously-designed, highly-practical anti-electric fire technical scheme.

The invention discloses a side position operation gear for a beaker, which includes a casing, as well as a rotary body, a beaker rotary control shaft, and a rotary body driving mechanism, wherein the rotary body is arranged on the casing in a rotating manner; the rotary body driving mechanism is linked with the rotary body in a rotating and driving manner; the rotary body is in transmission fit with the breaker rotary control shaft through a clutch in a separation and union manner; the outer end of the breaker rotary control shaft penetrates through the casing from the side part of the casing. The side position operation gear has the advantages that under the premise that the normal tripping operation of the breaker is not influenced, the side position control of the breaker is realized, under the signal control of a prepayment carrier wave electric energy meter, the full automatic control of no-fee tripping and renewing switching is realized.

The invention discloses a method and device for multi-mode control and protection of a transmission chain of a wind turbine. The steps of the method include: S1. Acquiring the operation data of a target wind turbine, and identifying each designated frequency of the transmission chain according to the operation data as a key monitoring frequency; S2 .Control the operation of the target wind turbine according to multiple preset control modes, and monitor the state of the transmission chain during the operation of the target wind turbine, and judge whether the specified operation index exceeds the normal range at the key monitoring frequency. If it is controlled within multiple presets The control mode is switched to adjust the corresponding operation index; the device includes a frequency identification module and a multi-mode control module. The invention has the advantages of simple implementation method, low cost, multi-mode automatic control and protection of the transmission chain of the wind power generating set, high protection control precision, good protection performance, fast response speed and the like.

The invention discloses a method and device for diagnosing dislocation of blades of a wind turbine. The steps of the method include: S1. Acquire acceleration data of a target wind turbine running within a specified period of time, perform statistics on the acquired acceleration data, and preliminarily determine whether or not according to the statistical results. A dislocation fault may occur, if it is, go to step S2; S2. Obtain the operating parameters of the wind turbine including the acceleration data within the specified time period for frequency domain analysis, and finally confirm whether the target wind turbine has a dislocation fault according to the result of the frequency domain analysis; the device Including the dislocation initial judgment module and the dislocation confirmation module. The invention has the advantages of simple implementation method, low cost, automatic diagnosis of blade installation dislocation, and high diagnosis accuracy and efficiency.