44results about How to "Realize leakage protection" patented technology

The invention provides an electric leakage protection circuit and method and an applicative driving device. The electric leakage protection circuit is used for achieving electric connection with a power supply line of a load, conducting spaced sampling on the power supply line, detecting the voltage of a sample electric signal so as to determine whether the voltage of an alternating-current inputpower supply is divided or not, and providing electric leakage protection based on determined results. The electric leakage protection circuit determines whether the voltage of the connected alternating-current input power supply is divided or not through spaced sampling conducted on the voltage of the power supply line and voltage dividing detection. When voltage division is determined, the powersupply line is disconnected, and electric leakage protection of the human body mistakenly undergoing electric shock and the load is achieved.

The invention discloses an insulation parameter detecting method for a mine low-voltage cable. The insulation parameter detecting method includes the steps that (1), the frequency of low-frequency signals is selected, according to the selecting principle, it is ensured that the injected low-frequency signals can not reduce insulation parameters of a power grid, the sensitivity of a protective device is improved, setting and filtering of a secondary circuit are facilitated, zero-sequence power-frequency signals and harmonic signals are finally filtered out, the injected low-frequency signals are reserved, and the anti-interference capacity is improved; (2), a low-frequency power source is output through an isolation transformer, enters the power grid through a three-phase electric reactor SK and is grounded through a ground capacitor and an insulation resistor of the power grid to form a low-frequency current circuit; (3), the low-frequency voltage signals and the low-frequency current signals are measured, phase difference exists between the voltage and the current, and a calculation formula of the insulation parameters is calculated and derived; (4), an insulation resistor formula is obtained; (5), a calculation formula of distributed capacitors is obtained.

A leakage protection method and device having a live/neutral wire identification function that identify the live wire and neutral wire of an input power source by means of a live/neutral wire identification device 1. If the live/neutral wires are discovered to be erroneously connected, the connections between the live wire L' and the neutral wire N' of an electric device and the live wire L and the neutral wire N of the power source are immediately adjusted directly or indirectly; or, the connection of a surface leakage signal pickup device 2 is adjusted; or, a main circuit switch K is made such that the main circuit switch cannot close the circuit or that the main circuit switch breaks the circuit immediately after closing the circuit, so that a user must correct the connections of the live/neutral wires of the power source; the surface leakage signal pickup device 2 is arranged such that said device is always connected to the neutral wire N of the power source and to the surface F of the electric device, so as to always monitor the electric potential of the surface F of the electric device over the neutral wire N of the power source. When the electric device surface leaks electricity, the leakage signal pickup device 2 immediately drives an electromagnetic tripping device 3 to break the main circuit switch 3, thereby breaking the connection between the electric device and the power source. The method and device of the present invention can remove leakage before a human body experiences an electric shock, thereby eliminating potential accidents; leakage accidents due to connection errors are prevented; electric device surface leakage can be effectively prevented even when the electric device is not connected to ground.

The invention provides an electric leakage breaker, which is provided with a microprocessor (12). The microprocessor (12) is respectively and electrically connected with button switches (S2 and S3), an electric operation mechanism movement circuit, an electric leakage detecting circuit, a voltage detecting circuit, an encoding switch setting circuit, an actuating mechanism movement circuit and light-emitting diodes (13 and 17-21). The electric leakage breaker can adjust setting of the electric leakage parameters automatically and has functions of low-voltage protection and over-voltage protection.

The application discloses a residual current operated circuit breaking device, comprising: a first zero sequence transformer which is arranged on a line to be detected and is used for outputting a first feedback signal when detecting a residual current through a first winding; a residual current detection circuit which is connected with the first zero sequence transformer and is used for making afirst end of a first switching circuit connected with a second end of the first switching circuit when receiving the first feedback signal; the first switching circuit of which the control end is connected with the residual current detection circuit; an electromagnetic tripper which is used for performing a switching-off action on the line to be detected after the first switching circuit is turnedon; a circuit breaker motherboard of which the input end is connected with the second end of the first switching circuit and which is used for making an electric switching-on/off operation mechanismperform a switching-off action on the line to be detected after the first switching circuit is turned on; and the electric switching-on/off operation mechanism which is connected with the circuit breaker motherboard. The scheme of the application improves the resistance to faults, and is beneficial to the completion of leakage protection by the circuit breaking device when leakage occurs to the line.

The invention discloses a smart socket device with the safety monitoring function. The smart socket device comprises an inlet plug, an outlet socket, a leakage protection module, a CPU main control module, a line fault detection module, a CPU main control module, a power detection module, and a wireless communication module. With the smart socket device provided by the invention, leakage protection of household appliances is realized, occurrence of electric accidents is prevented, and safety of electricity consumption is protected; the automatic monitoring of the line fault of connection of the smart socket device is realized and the electricity safety of the household appliance is ensured; remote operation of household appliances connected to the smart socket device is also realized, so that the diversified smart home needs of users are met; and the real-time monitoring of power consumption of household appliances connected to the smart socket device is also realized and the smart meter function is added.

The invention discloses an ultrasonic knife handle with electrodes. The ultrasonic knife handle comprises a knife handle body and a transducer, the outer side of the knife handle body is provided witha conductive sheet and an insulating sleeve, the conductive sheet and the insulating sleeve are integrally designed with the knife handle body and fixed on the outer tapered end face of the knife handle body, one end of the transducer is arranged in the knife handle body, and the transducer comprises an amplitude-change pole, piezoelectric ceramic, a transducer pressing block and a pressing screw; by adopting interference fit and an extrusion mode, the transducer is integrally connected with the knife handle body, the pressing screw is sequentially connected with a transducer pressing cover,the piezoelectric ceramic and the amplitude-change pole and is tightly connected with a amplitude-change pole pressing nut, and the front end of the amplitude-change pole is provided with an inner tapered hole used for installing a standard cutting tool clamping head. The knife handle can achieve electric leakage protection, dust proofing and water proofing; in additional, the machining efficiencycan be improved, the cutting force is reduced, and the surface quality after machining is improved.

The invention belongs to the technical field of mining variable-frequency driving, and discloses an electric leakage protection method and system for a mining variable-frequency driving system. The method comprises the following steps: S1 carrying out the four-path synchronous sampling of a three-phase output voltage and a ground leakage current of a frequency converter; S2 performing common-modetransformation on the measured three-phase voltage to obtain a common-mode voltage value; S3 performing Fourier transform on the common-mode voltage and the common-mode current to obtain a harmonic voltage and a harmonic current, and setting the frequency upper limit of the Fourier transform as the switching frequency of the frequency converter; S4 rejecting all harmonic signals of which the voltage amplitude is smaller than a voltage threshold or the current amplitude is smaller than a current threshold; and then successively calculating the phase difference between each harmonic voltage andach eharmonic current with the same frequency in the remaining harmonic waves, if the phase difference is within +/-10 degrees, judging that the resistive circuit occupies the main component, and outputting an electric leakage protection signal. According to the invention, the graded leakage protection function is realized, and the safety and reliability of the mining variable-frequency driving system are improved.

The invention provides an intelligent wireless remote-controlled power switch device comprising a main control module, a GPRS module, a relay, and a power module, wherein the GPRS module is connected with the main control module and is provided with a wireless communication antenna; the power module provides working voltage; the GPRS module is a general GPRS network access module and is internally provided with a handset SIM intelligent card with a GPRS service function; the GPRS module can carry out communication with the main control module by RXD signal wires and TXD signal wires and transmits data of a control module to a commanding center server in a GPRS way by Internet network access, thus realizing bidirectional transmission; in the device, the communication between an Internet and a central server is established by the online access of a GPRS; the related information such as voltage current and leakage current of the working power supply of equipment can be sent to the central server in real time; the setting or the adjustment on a working parameter (particular on the action threshold of the current leakage protection) can be carried out according to instructions given bythe central server, thus adapting to different weather conditions.

The invention discloses a self-adaptive selective leakage protection system and method for a mine low-voltage electric network. The system comprises a microcontroller module, double Ethernet communication circuit modules, an A/D (Analog-to-Digital) conversion circuit module, a leakage testing circuit module, a key operation circuit module, a noise elimination and filter circuit module, an electric network voltage and zero sequence voltage transmission circuit module, a plurality of branch zero sequence current transmission circuit modules, a liquid crystal display circuit module and a leakage tripping output circuit module. The method comprises the following steps: firstly, signal acquisition; secondly, signal collection, storage, analysis and processing; thirdly, manual leakage test existence judgment; fourthly, manual leakage test failure judgment and judged result output; fifthly, insulation parameter measurement and storage; sixthly, electric network leakage judgment; and seventhly, electric network leakage judged result output and leakage protection. The self-adaptive selective leakage protection system is novel and reasonable in design, strong in self-adaptability for different network structures of a mine power supply system, high in leakage detecting speed, reliable and accurate in action and high in popularization and application values.

The invention discloses an atomization core of an electronic cigarette. The atomization core comprises a cigarette holder and a ceramic atomizer, wherein a mounting sleeve is mounted at the bottom of the cigarette holder; an air filter is mounted in the mounting sleeve; the ceramic atomizer is mounted at the top of the air filter; a liquid guide seat is mounted at the top of the ceramic atomizer; and a liquid storage device is mounted at the top of the liquid guide seat. According to the invention, the ceramic atomizer is installed at the top of the air filter, and tobacco tar can be completely atomized into steam through the ceramic atomizer, so the smoking taste of a smoker is guaranteed, the problem that harm is increased due to the fact that the tobacco tar which is not completely atomized enters a breathing trachea is effectively solved, and the harm to the smoker is reduced; and meanwhile, the loss amount of the tobacco tar can be reduced through complete atomization, and the practicability of the atomization core is improved.

The invention discloses a charger with a built-in electric leakage protection circuit and an electric leakage protection method thereof. The protection circuit comprises a charger body, a relay mechanism circuit, a relay mechanism test circuit, an electric leakage detection circuit, a voltage reduction circuit and an output control circuit, wherein the relay mechanism circuit, the relay mechanism test circuit, the electric leakage detection circuit, the voltage reduction circuit and the output control circuit are installed in the charger body. A power supply is connected to an input terminal of the electric leakage detection circuit through an overload protection circuit. The relay mechanism circuit and the relay mechanism test circuit are connected to the input terminal of the electric leakage detection circuit. The electric leakage detection circuit is connected to an input terminal of a rectification circuit through a first filter circuit. An output terminal of the rectification circuit is divided into two paths. One path of the output of the rectification circuit is connected to the voltage reduction circuit through a second filter circuit. Another path of the output of the rectification circuit is connected to the voltage reduction circuit through a PWM circuit. The voltage reduction circuit is connected to an input terminal of the output control circuit. An output terminal of the output control circuit outputs to electric equipment. When there is an electric leakage phenomenon, the charger can be powered off automatically so that damages to people caused by electric leakage are avoided.

The invention related to a circuit breaker with an electric leakage protection function. The circuit breaker comprises a circuit breaker shell and an electric leakage test apparatus, wherein the electric leakage test apparatus comprises a sliding button, a built-in torsional spring, a metal probe and a metal circular pipe; the built-in torsional spring, the metal probe and the metal circular pipe are connected with a current-limiting resistor in series and then connected with a power supply in parallel; a use method of the circuit breaker with the electric leakage protection function comprises the following steps of step 1, performing a detection method in a normal state: 1.1, upwardly pushing a handle to realize power transmission; 1.2, performing a pressing test; 1.3, performing automatic resetting; and 1.4, performing limiting and releasing prevention; step 2, performing a method for preventing wrong power transmission in a detection state: 2.1, downwardly pulling the handle to realize power outage; 2.2, enabling the sliding button to be normally closed; and 2.3, performing automatic power outage when the handle is upwardly pushed wrongly, wherein an analog electric leakage circuit is in a switched-on state constantly, so that when the handle is upwardly pushed wrongly by an operator, a release apparatus of the circuit breaker acts to enable the circuit breaker to be in a power outage state, and the handle is restored to the downward pulling state, so as to effectively protect the maintenance staff.

The invention discloses a protection device for an electrical switch. The protection device comprises a cylinder body and a support rod, a bottom plate is fixed at one side, of the cylinder body through bolts, the internal portion of the body at the other side is sleeved with a protection cylinder, the outer edge of one side, far away from the cylinder, of the protection cylinder is connected witha transparent protection cover through a hinge, a support base is welded and fixed at one side, far away from the bottom plate, of the support plate, a protection cylinder body is movably installed in a mounting cavity arranged at one side, close to the protection cylinder, of the internal portion of the cylinder body, a spacing ring is welded and fixed at one end of a light spring body spring wire, the other end of the spring wire is welded and fixed at the bottom portion of the mounting cavity, a clamping block is connected with the internal portion of a mounting groove arranged close to the bottom portion of the mounting cavity of the cylinder body through a spring. An aluminum current-conducting plate is inlaid and installed in the cylinder, and has a cylindrical shape. According to the protection device for the electrical switch, the internally installed aluminum current-conducting plate guides the leakage to the ground, and the usage safety is high.

The invention discloses an intelligent protection device for safe power utilization, and relates to the technical field of power equipment. The main points of the technical scheme of the invention arethat the device comprises a distribution box and an upper computer; the interior of the distribution box is provided with an intelligent protection device and a circuit breaker; the intelligent protection device is provided with a current sensing detection module and a single-chip microcomputer connected with the current sensing detection module; the current sensing detection module comprises a current sensor, a leakage current sensor and a short circuit detection device; the current sensing detection module is connected with a signal amplifier; the circuit breaker is connected with an automatic power recovery module; the automatic power recovery module comprises an intermediate relay, a time relay and a bridge-shaped rectification filter circuit. The device can monitor the working stateof the power supply circuit in real time and quickly and accurately analyze and judge the electric leakage, electric shock and short circuit faults, can control the circuit breaker to accurately act according to circuit faults for the reliable safety protection of the power supply circuit, and can control the power supply system to recover power supply after the faults are removed.

The invention provides a carbon fiber heat supply device with a safety protection function. The carbon fiber heat supply device with the safety protection function comprises a heating layer and a protective layer which are arranged in a stacked mode, the heating layer comprises heating wires, the protective layer comprises a bare copper wire, the projection of each heating wire intersects with thebare copper wire, and the bare copper wire is connected with a zero potential point. The carbon fiber heat supply device has the beneficial effects that the protective layer is added, so that electric leakage protection is achieved, and harm to people caused by electric leakage of the heating layer can be avoided.