561 results about "Earth leakage circuit breaker" patented technology

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.

An earth leakage breaker includes a main contact, a switch mechanism, an operating handle, a leakage tripping device and an over-current tripping device having an earth-leakage-detection circuit disposed in a main-body case. A power-supply line connects the earth-leakage-detection circuit to the main circuit for supplying voltage between phases of the main circuit as a power source of the earth-leakage-detection circuit. Further, a test switch is provided for turning on and off a power-supply circuit of the power-supply line connected to the earth-leakage-detection circuit, and an operation of the test switch is linked to an ON / OFF operation of the switch mechanism.

A leakage current detection interrupter with fire protection means, comprising: (i) a leakage current protection circuit, (ii) an electrical cord with metallic fire shields, and (iii) a fire protection circuit, wherein, in operation, the leakage current protection circuit and the fire protection circuit detect a fault condition including a leakage current, a ground fault and a fire hazard, and disconnect the source of electricity from the at least one user accessible load when leakage current, ground fault or fire hazard is detected. The electrical cord with metallic fire shields, the fire protection circuit, and the indicator circuit can be combined with any ground fault circuit interrupter, arc fault circuit interrupter, immerse detection circuit interrupter, appliance leakage current interrupter and electronic leakage current interrupter.

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 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 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 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.