564 results about "Earth leakage circuit breaker" patented technology

The invention discloses a leakage circuit breaker which has a simple and small structure of a test circuit and can simultaneously perform accurate leakage tests. As a power supply circuit for supplying power to the leakage detection circuit in the leakage circuit breaker, a power supply circuit with a constant current circuit that converts the AC current supplied from the main circuit into a DC current and supplies a constant DC current to the leakage detection circuit is used, and the test resistance The elements are arranged in series in the circuit connecting the main circuit and the AC input end of the current stabilizing circuit, and the test coil of the zero-phase converter is connected to both ends of the resistance element through a test switch to form a leakage test circuit.

The invention relates to a leakage breaker combined test bench. It comprises a AC adjustable voltage power and an adjustable current power; it also comprises a picking-up device, an electrode touching device, a positioning device, a breaker gear and a controlling circuit; the picking-up device comprises a motor and a mechanism device derived by motor or liquid pressure; the positioning device comprises a space limiter fixed on the lifting gear and is used to fix the tested breaker; the electrode touching device comprises a motor, a liquid pressure driver or a device which is controlled by the electromagnetic means and connects the power electrode and the tested breaker end; the breaker gear comprises a device derived by liquid pressure, motor or electromagnetic means and is used to drag the hand of the tested breaker; the controlling circuit comprises an electric controlling wire which uses computer to connect each motivating circuit.

The present invention disclosed herein is an electric leak breaker for self-test. The electric leak breaker for self-test comprises power supply lines for connecting a power source supply with a load; a zero-phase current transformer installed on the power supply lines and for sensing a current difference between the power supply lines; a leakage current detecting unit connected to the zero-phase current transformer for detecting whether a leakage current occurs to generate a detection signal; a driving unit for making the power supply lines broken when a critical voltage or a voltage higher than the critical voltage is provided; and a self-test unit for periodically inducing the leakage current at the power supply lines to test whether the leakage detecting unit is normally operating, and for providing a lower voltage than the critical voltage to the driving unit to test whether the driving unit is normally operating in a self-test operation. According to the present invention, it is possible to periodically test the electric leak breaker as well as to overcome an inconvenience to push a reset button.

The invention discloses a dynamic type leakage circuit breaker, which comprises a leakage circuit breaker main body which is provided with an operation handle and a dynamic type drive mechanism which is used for driving the operation handle. The dynamic type drive mechanism comprises a motor, an eccentric wheel and a buffer type drive rod component, and the eccentric wheel is arranged on an output shaft of the motor; one end of the buffer type drive rod component is connected with the eccentric wheel, and the other end is connected with the operation handle. The invention has the advantages of simple structure and lower cost, and overcomes the defect that the operation handle of a traditional dynamic type leakage circuit breaker is damaged because of excessive force.

The invention relates to a low-voltage DC power distribution system for a general aircraft power distribution region, which comprises bus bars, a contactor, a rack, a voltage device and a current measuring device, wherein the bus bars comprise an important bus bar, a general bus bar and an emergency bus bar, a generator directly transmits electric energy to electric equipment of a general aircraftthrough the bus bars, an electro-mechanical contactor, which is driven by an internal logic and a two-way current sensor, is connected between the important bus bar and the general bus bar, and electric leakage circuit breakers are respectively connected between the important bus bar and the emergency bus bar and between the general bus bar and the emergency bus bar so as to perform reverse current protection. The low-voltage DC power distribution system has the characteristics that the isolation between an important region and a non-important region of the aircraft power distribution systemcan be achieved, the overload of the generator and the failure of the whole power supply system are avoided, the safety of the general aircraft is improved, and the like.

A circuit breaker for overcurrent protection and earth leakage protection includes a main housing, a circuit board, a zero-phase current transformer, an earth leakage detection circuit, a trip coil, a sensitivity current-switch, an action time switch, and an earth leakage test switch. The earth leakage detection circuit, the sensitivity current-switch, the action time switch, and the earth leakage test switch are mounted on the circuit board and installed in the main housing.

The invention relates to a test device used for a miniature electronic type leakage circuit breaker and the miniature electronic type leakage circuit breaker with the test device. The test device comprises a test button, a test torsion spring, a connecting conductor, a lever and a test resistor. The device can make coordination action with mechanical components of the circuit breaker. Whatever the state of the test button is, a test loop is cut off after the transmission of a leakage test signal is completed, so that the circuit breaker can be subjected to periodic tests safely even in reverse wiring.

An earth leakage breaker includes a main body housing having, in a single structure, a casing and a case cover, and an auxiliary cover for covering the case cover. The case cover has a recess for mounting an internal accessory device. Components including a main circuit contact, a contact switching mechanism, an operation handle, an overcurrent tripping device, an earth leakage detection circuit combined with a zero-phase current transformer, and an earth leakage tripping device, are retained in the main body housing. An earth leakage operation output switch is detachably mounted in the recess formed in the case cover of the main body housing. The earth leakage operation output switch is an internal accessory device that indicates earth leakage trip operation electrically and linking mechanically with the earth leakage trip device to operate the earth leakage operation output switch in the earth leakage trip operation.

The invention discloses a function test system applied to an automobile electronic control unit. The system includes: an industrial computer, a direct current power supply, a desk type digital multimeter, a signal generator, a matrix module, a power supply transformation module, a communication transformation module, a high-power switch group, a current loop, a simulation load, a needle bed jig, a bar code scanning device, a signal indicating lamp, a direct current matrix switch, an emergency stop button, an electricity leakage circuit breaker, a cooling fan, a display, a UPS (uninterruptible power supply), and an alternating current extension module. Each module of the system is independent; the overall performance is more reliable; the upgrade of an independent module does not affect other modules to work; and the reliability in using the function test system is ensured.

The invention discloses a residual-current circuit breaker. The residual-current circuit breaker comprises an outer shell body, wherein a middle partition plate is arranged in an inner cavity of the outer shell body, the inner cavity of the outer shell body is divided into a left concave cavity and a right concave cavity through the middle partition plate, the left concave cavity is symmetrical to the right concave cavity in a bilateral mode, an electric leakage detection system is arranged in the left concave cavity, and a breaker tripping mechanism is arranged in the right concave cavity. The residual-current circuit breaker is characterized in that an electric leakage protection tripping mechanism which is connected with the electric leakage detection system is further arranged in the left concave cavity, and the electric leakage protection tripping mechanism comprises an electric leakage protection handle, an electric leakage protection jump buckle, an electric leakage protection lock catch, an electric leakage protection moving contact, an electric leakage protection fixed contact, an electric leakage protection electromagnetic coil and an electric leakage protection ejector rod. Due to the adoption of the structure, the residual-current circuit breaker is more reasonable in structure, safer to use and capable of greatly improving a rated current.

The invention relates to a reclosing device for a small-size residual-current circuit breaker.The reclosing device is characterized by comprising a bottom cover and a cover body connected with the bottom cover. A circuit board, a handle shifting wheel, an outlet wiring terminal, an inlet wiring terminal, an N-pole switch and a drive mechanism are arranged in the bottom cover and the cover body. The drive mechanism comprises a semi-circle bevel gear and a gear motor, an output shaft of the gear motor is sleeved with a transmission gear, and the transmission gear is meshed with the semi-circle bevel gear; the handle shifting wheel and the semi-circle bevel gear are arranged in an attached mode, the end face, facing towards the handle shifting wheel, of the semi-circle bevel gear is provided with an arc-shaped limiting groove, the end face, facing towards the semi-circle bevel gear, of the handle shifting wheel is provided with an arc-shaped boss capable of reciprocating along the arc-shaped limiting groove, and the handle shifting wheel is connected with a connection rod. The reclosing device for the small-size residual-current circuit breaker has the advantage that the requirements for opening and closing the small-size residual-current circuit breaker through remote signal control are effectively satisfied.

The invention discloses a full-automatic flexible plate bending machine which comprises a control box, a first start button, a second start button, a first counter, a second counter, a barometer, an emergency stop button, a maintenance button, an indicator light, an earth leakage circuit breaker, a radiating fan, a temperature controller, an air pressure governor, a power socket, an air source inlet, and a lower template, wherein the first start button, the second start button, the first counter, the second counter, the barometer and the emergency stop button are arranged on the front panel of the control box; the maintenance button, the indicator light, the earth leakage circuit breaker and the radiating fan are arranged on a right panel of the control box; the temperature controller and the air pressure governor are arranged on the left panel of the control box; the power socket and the air source inlet are arranged on the rear panel of the control box; the lower template is arranged on the upper panel of the control box; a first linear lead rail and a second linear lead rail are arranged at two sides of the lower template; the upper template and the lower template are connected through a contour block of a sliding block; and a plurality of bending mechanisms are arranged on the upper template and the lower template, and cylinders are arranged above the mechanisms and connected with the upper template through a plurality of round contour columns. The full-automatic flexible plate bending machine adopts an electric integrated control, is small in size, high in efficiency, convenient to operate, and suitable for production of a flexible circuit board.

The invention discloses an overvoltage and electric leakage integrated protection circuit breaker, comprising a shutdown switch, a first overvoltage protection component, a second overvoltage protection component, a zero-sequence current transformer, an electromagnetic relay, a tripping linkage mechanism and an electric leakage protection triggering circuit; the first overvoltage protection component comprises a voltage dependent resistor chip and a PTC thermistor chip located in an encapsulating layer and has three leading-out terminals; the second overvoltage protection component comprises a voltage dependent resistor chip and a PTC thermistor chip located in an encapsulating layer and has two leading-out terminals; when the shutdown switch is a single-phase power switch, only one first overvoltage protection component is installed; when the shutdown switch is a three-phase power switch, one overvoltage protection component and two overvoltage protection components are installed; when the electric leakage or the overvoltage in any phase of the three-phase power supply occurs, the shutdown switch can trip off immediately. The circuit breaker has an overvoltage and electric leakage integrated protection function; and the safety and the reliability of the circuit breaker are much better than that of the present electric leakage circuit breaker.

The invention discloses a power supply line breaking protection and alarm system and a device thereof. The system consist of a current leakage generation device (3), a voice player (2), a current leakage breaker (1), a current leakage grounding device (4), a wireless alarm extension (5), an alarm electric bell (6), a wireless receiving alarm mainframe (7), an online computer (8) and a siren horn (9), wherein the current leakage generation device (3) consists of an under-voltage release and a current leakage mechanism; the under-voltage release consists of a coil (15), an iron core (18), a shell (20), an ejection spring (16) and an insulated plate (17); and the current leakage mechanism consists of a movable connecting rod (22) and a lock catch plate (21). The automatic design of the invention greatly improves the service life and the reliability, effectively maintains the safety of electric grid power supply and avoids the phenomenon that broken line electrification damages the life and property of people. The invention has precise design, convenient maintenance and low cost, and is suitable to be used in power supply lines.

The invention relates to a creepage disengaging device for a creepage breaker, with a subject of improving the connection and configuration structure of the components of the creepage disengaging device loaded in the creepage breaker so as to achieve a small size and the compactness. The solution scheme is as below: in the creepage disengaging device which is provided with a creepage tripping coil (8), a tripping actuator (9) connected with a plunger of the creepage tripping coil and an upward bounced creepage display button (10), the creepage tripping coil is a magnetism maintaining electromagnet which has a magnetic yoke (8a) provided with a permanent magnet (8b) and a degaussing coil (8c). The electromagnet is arranged on an ordinate axis and has one side at the upper part connected with the creepage display button through the plunger of the creepage tripping coil. Besides, the tripping actuator which moves upwards and downwards under a force exerted upwards by a tripping spring is arranged on one side of the lower part of the tripping coil.

Malfunction of an earth leakage breaker due to a lightning surge is prevented, and when a lightning arrester is short-circuited and damaged by a high-level lightning surge, a power supply short circuit is prevented.A contact 41, an overcurrent detector section 43, and a zero phase current transformer 44 are disposed in order from a power supply side to a load side, and a lightning arrester 3 is connected between the overcurrent detector section 43 and the zero phase current transformer 44.

The present invention provides an electric leakage circuit breaker which is a multipole leakage breaker. The inner part of a main case is carried with an opening and closing mechanism for the main circuit connection point, an excess current tripping device, and an electric leakage tripping part which combines an electric leakage detection circuit and a tripping operation coil unit on a null phase current transformer. Flexible stranded wires (15) as the primary conductor of the null phase current transformer (5) are wound between the excess current tripping device (4) of poles and a load terminal (14). The stranded wires of the null phase current transformer and the primary conductor thereof are installed on a unit assembling armature (18) made of casting resin and in are assembled in the main case. The unit assembling armature is provided with guard wall parts between poles (18a), retaining parts for retaining the stranded wires (18b, 18c), retaining sheets for retaining the stranded wires (18d, 18e), stranded wires of the primary conductor keeping through the null phase current transformer along prescribed wire path, and a hasp fitting piece (18f) and an eave shaped fin (18g) for retaining the null phase current transformer (5) at a prescribed position.

The invention relates to a circuit of a miniature electric leakage circuit breaker. The circuit of the miniature electric leakage circuit breaker comprises a power supply circuit, and is characterized by also comprising an electric leakage signal conditioning circuit, an electric leakage detection control unit, an electric leakage detection control unit required circuit, an electric leakage testing circuit and a tripping circuit, wherein the power supply circuit is connected with the electric leakage testing circuit, the electric leakage detection control unit and the tripping circuit; the electric leakage signal conditioning circuit is connected with the electric leakage detection control unit; the electric leakage detection control unit required circuit is connected with the electric leakage detection control unit. According to the circuit of the miniature electric leakage circuit breaker provided by the invention, the withstand voltage value of the tripping circuit is increased, the lightning surge resistance is improved, and moreover, the cost performance is high; the working temperature rise of the power supply circuit is reduced, the product reliability is improved, the pulse packet resistance of a product is improved, and the false tripping phenomenon of the product is reduced. The circuit of the miniature electric leakage circuit breaker is simple in design, strong in EMC (electromagnetic compatibility) resistance, high in reliability and low in cost, and more meets the actual demand of the miniature electric leakage circuit breaker.

The invention relates to an integral residual current circuit breaker. A transformer placing cavity for placing a transformer of a residual current detection part is arranged in a position, between an assembly cavity and an outlet terminal mounting seat, on a shell. A bimetal sheet adjustment platform is formed above the transformer placing cavity of the shell. The bimetal sheet adjustment platform is provided with an observation window and an adjustment window. The observation window passes through the bimetal sheet adjustment platform. The observation window corresponds to a position of matching between a bimetal sheet and a lock catch in an L-pole electromagnetic tripping device. An adjustment screw is installed in the adjustment window. The adjustment platform is covered with a sealing cover. Compared with the prior art, the integral residual current circuit breaker has the advantages of compact structure, convenient and reliable bimetal sheet position adjustment operation, easy installation, and easy bimetal sheet adjustment and repair.

The invention relates to an electric-leakage circuit breaker with a reverse-wiring structure and mainly solves a problem, which exists in the prior electric-leakage circuit breakers, that under a reverse wiring condition, when an electric-leakage fault happens, a coil of an electric-leakage release is damaged so that reduction of service life is caused. The electric-leakage circuit breaker includes a casing, an operation mechanism, a contact mechanism, an electric-leakage release, connection terminals, a live line and a zero line. The contact mechanism includes L-pole moving and static contacts and N-pole moving and static contacts. The connection terminals include L-pole wire inlet and wire outlet terminals and N-pole wire inlet and wire outlet terminals. One end of the live line is connected with the electric-leakage release and one end of the zero line is connected with one end of the release through a circuit board control line. The other end of the live line is electrically connected with the L-pole wire outlet terminal and the other end of the zero line is electrically connected or disconnected with the N-pole moving contact through an on-off mechanism. The electric-leakage release moves and drives the on-off mechanism to control the zero line to be electrically disconnected with the N-pole moving contact. The contact mechanism switches on and drives the on-off mechanism to control the zero line to be electrically connected with the N-pole moving contact. Because the electric-leakage circuit breaker is provided with the on-off mechanism, even if a reverse wiring condition of a user happens, when an electric-leakage fault happens, the electric-leakage release moves and can cut off a power supplying voltage of the release through the on-off mechanism so that damage of the electric-leakage circuit breaker is prevented and normal use of the coil is ensured.

The invention relates to the low-voltage residual-current circuit breaker, especially to a moving contact operating mechanism for a residual-current circuit breaker. According to the technical scheme, the moving contact operating mechanism is characterized in that the operating mechanism comprises a moving contact, a trip buckle, a moving contact bracket, a latch spring, a latch and a tension spring. A long through hole is formed in the moving contact bracket; a pin shaft is arranged in the long through hole; and the two ends of the pin shaft are arranged on a base and a cover of a circuit breaker. The trip buckle is hinged to the upper end of the moving contact bracket. The middle part of the latch sleeves the pin shaft movably by a set through hole; an abutting pin that cooperates with the trip buckle in an abutting mode to limit rotation of the trip buckle is arranged above the latch in an extending mode; and a push pin and a reset pin arranged below the latch. On the basis of the scheme, with the novel operating mechanism, the length or width of the residual-current circuit breaker can be smaller than that of the product in the prior art; and needs of customers can be met well.

The invention relates to an automatic electric leakage detection platform for an electric leakage circuit breaker. The automatic electric leakage detection platform comprises a frame, conveyor belts, a material loading table, a manipulator, a positioning table and a detection fixture, and is characterized in that the conveyor belts, the material loading table, the positioning table and the detection fixture are all arranged in the frame, the positioning table is arranged at the middle of the detection fixture, the two conveyor belts are respectively arranged at two sides of the detection fixture, the material loading table is arranged on the conveyor belts and moves along with the conveyor belts, a guide rail, which is vertical with the conveyor belts, is arranged above the frame, the manipulator is connected to the guide rail and slides thereon, the manipulator grabs an electric leakage circuit breaker on the material loading table above and then moves upward, then the manipulator moves to a position above the positioning table located at the middle of the detection fixture through a transverse moving mechanism and places and positions the electric leakage circuit breaker on the positioning table, and then the detection fixture at both sides moves inward so as to insert detection electrodes into wiring terminals of the electric leakage circuit breaker to carry out detection. The automatic electric leakage detection platform is accurate in detection position, small in error and high in precision.

The purpose of the present invention is to provide a leakage circuit breaker, which can prevent a built-in power circuit from breakdown by cutting off the leakage circuit breaker even in a condition such as a voltage withstand testing in which overvoltage is applied on an AC circuit continuously. The leakage circuit breaker of the present invention comprises: a rectification circuit for converting an AC voltage supplied from a AC circuit (1) to a DC voltage; a second constant voltage circuit (53) of stepping down the voltage output from the rectification circuit; a second zener diode (54) for detecting overvoltage from the output voltage of the rectification circuit; a second resistor (55) for stepping up the output voltage of the second constant voltage circuit (53) while the overvoltage is detected by the second zener diode (54); a third zener diode (56) for absorbing surge current while the output voltage of the second constant voltage circuit (53) reaches to a first predetermined value; and a overvoltage detection circuit (9) for detecting whether the output voltage of the second constant voltage circuit (23) reaches to the predetermined value so as to activate a tripping device.

An un-lengthened 18mm-width multifunctional residual current circuit breaker comprises a fixed contact and a movable contact, wherein a cavity is formed at the lower layers of both the fixed contact and the movable contact; a leakage trip device is arranged in the cavity; and a coil iron core of the leakage trip device is directly in transmission connection with a lock catch through a transmission part. The invention has the benefits that the un-lengthened 18mm-width circuit breaker can achieve leakage protection even when a zero line is broken and has the 6000V breaking capacity; the electromagnetic compatibility meets the national standard and leakage tripping can be reliably realized when the voltage is below 50V; and a current coil and a voltage coil neither adopt an inserting and sleeving structure nor share a framework core and a spring, instead, are independent mechanisms respectively placed in different positions, so that heating burning and electromagnetic mutual inductance, caused by dual-coil inserting and sleeving, are avoided, and the problem of insufficient leakage tripping force is solved.

The present invention discloses a residual current circuit breaker of a test circuit, which has the advantages of simple structure, small size and accurate electric leakage test. The residual current circuit breaker comprises the following components: an open and close part which switches on and off a main circuit; a zero-phase current transformer which is traversed by all phase conductor of the main circuit; an electric leakage detecting circuit which determines the generation of the current leakage according to the output current of the electric leakage detecting coil of the zero-phase current transformer; an operating time setting circuit for setting the operating time of the electric leakage detecting circuit; a breaking device for breaking and switching off the open and close part according to the output signal of the electric leakage detecting circuit, which represents the generation of electric leakage; a power source circuit which supplies the electric power to the electric leakage detecting circuit; and a test circuit which is provided with a test switch which supplies the test current to the test coil of the zero-phase current transformer, wherein the test circuit is installed with a unit which operates together with the test switch and is set to a preset operating time irrespectively with the setting of the operating time setting circuit.

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.