60results about How to "Effective grounding" patented technology

The invention provides a thunder and lightning protective survey early warning system and a using method. The system comprises a data collecting module, a data processing module, a system control module and a thunder and lightning protective device, wherein the data collecting module comprises a data detecting assembly and a data integration unit; the data integration unit collects and arranges data detected by the data detecting assembly and uploads the data to the data processing module; the data processing module formulates a processing scheme for data processing; and the system control module controls the thunder and lightning protective device according to the processing scheme. The thunder and lightning protective survey early warning system carries out safety detection on the thunder and lightning protective device and ensures that the thunder and lightning protective device is effectively grounded to enable the thunder and lightning protective device to be in a normal working state.

The invention relates to a motor, relates to the field of motor equipment, and mainly aims at solving technical problems that a conventional motor is not sufficient in mechanical strength and has a problem of shaft current corrosion. The main technical scheme of the invention is that the motor comprises a motor case, a plastic packaging part, and a stator module with a stator core; the stator module is disposed in the motor case, and there is a gap between the stator module and the motor case; the strength of the motor case is greater than the strength of the plastic packaging part; the plastic packaging part is located in the gap, and is integrated on the stator module and the motor case. In addition, the motor case can be made of a conductive material, such as metal. The stator core makes contact with the motor case. According to the technical scheme of the invention, the strength of the motor case is greater than the strength of the plastic packaging part, thereby enabling the mechanical strength of the whole motor to be increased. In addition, because the stator core makes contact with the metal motor case and is in effective connection with a rear end cover and a rotor bearing to form an equipotential level, the motor is enabled to be grounded effectively, and the shaft current of the motor is reduced.

The invention relates to a three-station switch with the capability of breaking a bus transfer current and solves the problems that a moving contact of the existing three-station switch has low moving speed and SF6 gas with good insulating capacity needs to be used as insulating gas for realizing rapidly breaking of the bus transfer current, so that the environment pollution can be caused. The three-station switch is characterized in that an isolation breaking conductor is arranged in an inner cavity of an isolation conductor; an isolation conductor contact finger spring is arranged in the isolation breaking conductor; a moving conductor is arranged in an inner cavity of a middle conductor; a breaking spring and a conducting rod are arranged in an inner cavity of the moving conductor; a rack is fixedly connected in a rack mounting groove processed on the moving conductor; and the middle conductor is provided with a gear meshed with the rack. The three-station switch has the beneficial effects that by rapidly breaking the conducting rod and generating compressed air blast, the rapid breaking of an isolation switch is realized and the aim of extinguishing an electric arc generated by the bus transfer current is fulfilled, so clean and dry air or nitrogen can be used as the insulating gas, the SF6 gas does not need to be used as the insulating gas and equipment is more environmental-friendly.

The invention relates to a packaging structure shared by a heat dissipation channel and a ground wire channel in three-dimensional packaging. The packaging structure comprises a packaging chip, wherein the packaging chip comprises a substrate; the substrate internally comprises a power connecting hole, a heat dissipation grounding hole and a signal connecting hole; a power connecting conductor is filled in the power connecting hole; a heat dissipation grounding conductor is filled in the heat dissipation grounding hole; a signal connecting conductor is filled in the signal connecting hole; the power connecting conductor is isolated from the substrate through an insulation layer in the power connecting hole; the signal connecting conductor is isolated from the substrate through an insulation layer in the signal connecting hole; a heat sink ground plane plate is arranged above the packaging chip; a base plate is arranged under the packaging chip; the heat sink ground plane plate is arranged in the base plate; an upper end of the heat dissipation grounding conductor is contacted with the heat sink ground plane plate; and a lower end of the heat dissipation grounding conductor is contacted with the heat sink ground plane plate in the base plate. The packaging structure has a simple and compact structure, is favorable to improve a heat dissipation effect and a grounding effect of three-dimensional packaging, is wide in application range, and is safe and reliable.

The invention provides a transformer DC bias suppression device, which includes a detection control unit, a suppression unit, a lightning rod, a knife switch and a first resistor; the detection control unit is connected to the suppression unit; the neutral point of the transformer is connected to the suppression unit in parallel , lightning rod, knife switch, and then the first resistor in series, and then grounded. A suppression method applied to the suppression device and a transformer system comprising the suppression device or comprising the suppression method are also provided. The invention has the beneficial effect of applying a direct-current bias scheme in which a wide bandgap semiconductor device SiC IGBT is combined with a resistor in series. It is proposed to use a semiconductor switch as a DC blocking device. Under the condition of ensuring the effective grounding of the transformer, the average grounding current is maintained within a reasonable threshold to achieve the effect of suppressing the DC bias of the transformer. It can effectively ground the suppression device, withstand voltage level, Find a better balance in several aspects of flexibility and expanding the scope of application.

The invention belongs to the technical field of current transformers, and particularly relates to a current transformer with a low-voltage shielding function. The current transformer comprises an insulator, a primary coil and a secondary coil, wherein the primary coil and the secondary coil are encapsulated in the insulator; the primary coil penetrates through a central hole of the secondary coil;low-voltage shielding devices arranged below the primary coil are arranged at the two ends of the secondary coil; each low-voltage shielding device comprises a metal wire weaving net, a metal wire and an embedded nut; a secondary lead of the secondary coil is led out from the insulator; and the secondary lead is arranged below the metal wire weaving net. According to the current transformer, high-voltage electric fields of the primary coil of the current transformer are shielded in the metal wire weaving nets in order to play a protective effect on the insulation; and meanwhile, the partial discharge level of a current transformer product is greatly improved after processing through a method.

The invention relates to a neutral point and shell dual ground system for transformers and solves the defect that proneness of transformer ground contacts to corrosion or breaking causes major sources of hidden dangers as compared with the prior art. The system comprises a transformer, ground flat bars, and a current transformer; the ground flat bars are fixedly and vertically mounted on a ground device; a neutral point of the transformer is connected with the current transformer; the current transformer is connected with copper connecting terminals B of the ground flat bars through neutral point ground wires; shell ground contacts of the transformer are connected with copper connecting terminals A of the ground flat bars through transformer shell ground wires; the copper connecting terminals A are 60mm away from the copper connecting terminals B; the copper connecting terminals A are connected with the copper connecting terminals B through cotton covered wires which are BVR35 in specification. The neutral point and shell dual ground system for transformers has the advantages that effective grounding can be maintained even after one ground terminal is corroded and broken.

The invention discloses a current sensor which comprises a magnetic core, a Hall chip, a printed circuit board and a crimping elastic sheet. The magnetic core is provided with an air gap, the Hall chip is arranged in the air gap, and the Hall chip is welded and fixed on the printed circuit board; a grounding terminal is arranged on the printed circuit board, the crimping elastic sheet is arrangedbetween the magnetic core and the printed circuit board and is respectively connected with the magnetic core and the printed circuit board, and the crimping elastic sheet is electrically connected with the grounding terminal. According to the current sensor, effective grounding of the magnetic core is realized, the measurement precision is ensured and the current sensor is convenient to assemble.

The invention discloses a water temperature sensor which comprises a framework, a magnetic switch, a grounding lug I, a thermistor, a grounding lug II and a shell, wherein the framework is arranged in the shell, the grounding lug II and the grounding lug I are arranged on the framework, the grounding lug II is electrically connected with the shell, the grounding lug I is electrically connected with the grounding lug II, the magnetic switch is arranged in the framework and is electrically connected with the grounding lug I, the other end of the magnetic switch is electrically connected with one of terminals which are positioned at the two sides of the framework, the thermistor is arranged under the framework, one end of the thermistor is electrically connected with the other one of the terminals positioned at the two sides of the framework, and the other end of the thermistor is electrically connected with the grounding lug II. With the arrangement of the grounding lug I and the grounding lug II, the thermistor and the shell are electrically connected together, a guide line and a spring are not required to be used, so that defects of guide line breakage or thermistor crushing are overcome, meanwhile, the assembly process is also simplified; and the grounding lugs are used for direct connection, so that the thermistor is ensured to be effectively grounded, and the measuring reliability is ensured.

The invention provides a lighting protection system of a power generation system and a using method of the lighting protection system. The lightning protection system comprises a lighting protection monitoring and pre-warning system and a power generation equipment lighting protection device, wherein the lighting protection monitoring and pre-warning system is in data connection with the power generation equipment lighting protection device; the lighting protection monitoring and pre-warning system is used for collecting environmental parameters which are processed to control the power generation equipment lighting protection device; and the power generation equipment lighting protection device is arranged on power generation equipment for protecting the power generation equipment. According to the lighting protection system provided by the invention, the lighting protection monitoring and pre-warning system is used for performing safety detection on the power generation equipment lighting protection device and the power generation equipment lighting protection device is guaranteed to be effectively grounded, so that the power generation equipment lighting protection device is in anormal working state.

The invention discloses a separating device for a dangerous initiating explosive device assembly, belongs to the technical field of assembly, and solves the technical problem that an existing separating tool cannot safely disassemble the dangerous initiating explosive device assembly. The separating device comprises a fixing mechanism and a crimping screw ring dismounting mechanism, the dangerous initiating explosive device assembly comprises a dangerous initiating explosive device body and a first initiator; the dangerous initiating explosive device body is cylindrical; the first initiator is arranged on the first end face of the dangerous initiating explosive device body; the first trigger is arranged in the first trigger chamber, and the first trigger chamber is sleeved with a first fastening screw ring; the first crimping screw ring is used as an end cover to fix the first initiator in the first initiation chamber; the fixing mechanism is used for supporting the dangerous initiating explosive device body, the dangerous initiating explosive device body is fixed through the outer surface of the body, and the triggering chamber and the fastening screw ring are relatively fixed; and the screw ring dismounting mechanism is used for dismounting the first crimping screw ring, so that the first initiator is separated from the dangerous initiating explosive device body. According to the invention, safe separation of the initiator and the dangerous initiating explosive device body is realized, and accidents are prevented.