14results about "Switch operated by falling voltage" patented technology

A circuit breaker protecting an electric low-voltage circuit includes a housing with grid-side and load-side connections and a series circuit of a mechanical isolating contact unit on the grid side and an electronic interruption unit on the load side. The mechanical isolating contact unit has a handle opening and closing contacts. A current sensor unit is disposed in a conductor between the isolating contact unit and the interruption unit, for ascertaining a current level of the low-voltage circuit. A control unit is connected to the current sensor unit, electronic interruption unit, and mechanical isolating contact unit. When current and / or current / time thresholds are exceeded, prevention of a current flow in the low-voltage circuit is initiated. A power supply unit supplying energy to the circuit breaker is connected to conductors of the low-voltage circuit between the isolating contact unit and the interruption unit.

The present invention relates to a method for monitoring the switch-on characteristic of an electrical switching device, having at least the method steps of: i) switching on the switching device; ii) monitoring the supply voltage when the switching device is switched on; and iii) monitoring the switching voltage when the switching device is switched on; wherein, iv) the supply voltage and the switching voltage are monitored with regard to their voltage values and the voltage values are compared with setpoint values or setpoint ranges that can be preset.

The invention discloses a switching device for a 400V under-voltage release, which relates to the technical field of circuit protection and comprises a cylindrical lantern ring and a buckle assembly. The circular lantern ring is fixedly mounted at the upper end of the undervoltage release connecting rod; the section shape of the circular lantern ring is a circumferential contour, the circular lantern ring is designed to be a straight seam opening, and circular holes are formed in the two ends of the opening of the circular lantern ring respectively. The circular lantern ring comprises a circular wrapping part and a movable part; the buckle assembly comprises a tightening sleeve and a tightening pin, the interior of the round hole and the tightening sleeve are fixedly installed, and the tightening pin and the tightening sleeve are in interference fit; the interference fit means that the inner diameter of the tightening sleeve is slightly smaller than the outer diameter of the tightening pin, and during installation, the tightening pin is sleeved with the tightening sleeve through external force. According to the invention, through the cooperation between the switching device and the undervoltage tripper, the maintenance operation without power cut is realized, and the field operation and maintenance efficiency is improved.

The present invention relates to a manual motor starter and, more specifically, to a trip device for a manual motor starter. A trip device for a manual motor starter according to an embodiment of the present invention comprises: a trip unit body forming the base of a trip unit; a fixed contact coupled to the lower portion of the trip unit body; a heater assembly inserted and coupled to the trip unit body and detecting the heat variation; a coil coupled to the upper portion of the trip unit body; a core unit inserted into the coil; a terminal rod coupled to the core unit and the trip unit body, and having one end portion forming a terminal unit; and an instant trip lever which is rotatably coupled to the trip unit body and is operated by the core unit, wherein a coil attachment portion in which the coil is inserted and installed protrudes from the trip unit body.

The present invention discloses an under-voltage release. The under-voltage release of the present invention includes a dual-coil electromagnet having a holding suction coil and a starting suction coil, a first switching circuit and a second switching circuit respectively used to control the on / off of the holding suction coil and the starting suction coil, and a control circuit used to control the first switching circuit and the second switching circuit according to the grid voltage; when the grid voltage value is greater than or equal to the set value, the control circuit controls the first switching circuit to conduct while controlling the second switching circuit to conduct first for a preset time and then turn off; when the grid voltage value is less than the set value, the control circuit controls both the first switching circuit and the second switching circuit to turn off. Compared with the prior art, the present invention has the advantages of no high-frequency noise, no high-frequency radiation, simple control circuit, strong anti-interference ability, and low circuit power consumption.

A multifunctional circuit breaker belongs to the technical field of circuit breakers and comprises a key power switch, a circuit breaker body, a first voltage detection circuit, a second voltage detection circuit, an electric leakage detection circuit, a control circuit, a receiving circuit and a rectifying circuit. The first voltage detection circuit, the second voltage detection circuit, the electric leakage detection circuit, the control circuit and the rectification circuit are installed outside the side end of a shell of the circuit breaker body and are electrically connected, and the receiving circuit is moved to a management personnel end. The circuit breaker has the functions of opening and closing a power supply and protecting electric leakage of a common circuit breaker, in application, under the combined action of related mechanisms, when the power supply voltage of a corresponding area is too high or too low and the shell leaks electricity, a user can be actively prompted in a wireless mode, the power supply is delayed to be closed, faults of electric equipment due to abnormal voltage are reduced, and the safety of the electric equipment is improved. And moreover, an output power supply can be switched off through the key power switch, so that the electric shock accident of a worker caused by the fact that the circuit breaker body is closed by other personnel during maintenance is prevented.

The present invention relates to a device for protecting an electrical installation, comprising a pair of input terminals (12, 14), an input line (16) provided with two input conductors (16L, 16N) each connected to one of the input terminals (12, 14), at least two output lines (18, 20, 22) connected to the input line (16), provided with two output conductors (18L, 18N, 20L, 20N, 22L, 22N), an output current measuring device (24, 26, 28) and capable of supplying a downstream electrical installation, an electronic disconnection device (40) comprising power switches (42, 44) based on semiconductor components connected in series between the input line (16) and the output line (18, 20, 22), and a unit of control (50) capable of controlling the electronic switching device (40) and capable of receiving a signal representative of an output current from each output line (18, 20,22) measured by the output current measuring device (24, 26, 28).

The application discloses a spring operating device with under-voltage tripping and manual locking functions and relates to the technical field of high-voltage switches.The spring operating device comprises a mechanism box, an output crank arm and a tripping pin shaft are arranged on a spring operating assembly, a main tripping electromagnet is arranged at the front end of the tripping pin shaft, an under-voltage tripping assembly is arranged side by side with the main tripping electromagnet and comprises a front-end electromagnet and a rear-end electromagnet connected in series, the striker rod of the under-voltage tripping assembly is extended to hit the tripping pin shaft when power is lost, a plug plate is movably arranged between the front-end electromagnet and the rear-end electromagnet, the plug plate is provided with a U-shaped groove for blocking the striker rod of the front-end electromagnet from being extended when the plug plate is in a locking position, a manual locking assembly is arranged on the mechanism box and is in transmission connection with the plug plate through a steel wire rope, and the manual locking assembly is used for driving the plug plate to switch between a locking position and an unlocking position.The spring operating device realizes automatic tripping protection when power is lost, can mechanically lock the under-voltage tripping function through the manual locking assembly, ensures the safety of maintenance, and has the advantages of compact structure, high modularization degree and convenient operation.

The invention relates to a method for monitoring a switching behavior of an electrical switching device, comprising at least the following method steps: i) switching on the switching device; the method comprises the following steps: i) monitoring the supply voltage during the switching of the switching device, ii) monitoring the supply voltage during the switching of the switching device, and iii) monitoring the switching voltage during the switching of the switching device, and iv) monitoring the voltage values of the supply voltage and the switching voltage and comparing the voltage values with a predeterminable target value or target range.

The invention relates to an undervoltage release (5) of a circuit breaker (1). The undervoltage release (5) comprises a capacitor storage unit (7) configured to store a tripping energy (15), a tripping unit (9) configured to activate a switching unit (3) to switch off the circuit breaker (1) when the tripping energy (15) is supplied to the tripping unit (9), and a monitoring unit (13) configured to monitor an auxiliary voltage (19) and to supply the tripping energy (15) stored in the capacitor storage unit (7) to the tripping unit (9) when the auxiliary voltage (19) falls below a threshold value stored by the monitoring unit (13).

Undervoltage release (5) of a circuit breaker (1), comprising undervoltage release (5) - a capacitor storage device (7) designed to store a trigger energy (15), - a trip unit (9) which is configured to activate a trip unit (3) to switch off the circuit breaker (1) when the trip energy (15) is supplied to the trip unit (9), and - a monitoring unit (13) configured to monitor an auxiliary voltage (19) and to supply the release energy (15) stored by the capacitor storage (7) to the release unit (9) when the auxiliary voltage (19) falls below a threshold value stored by the monitoring unit (13), with a charging unit (11) configured to charge the capacitor storage (7), wherein the monitoring unit (13) is configured to control the charging unit (11).

The invention relates to an undervoltage release (5) of a circuit breaker (1). The undervoltage release (5) comprises a capacitor storage unit (7) which is designed to store a release energy (15), a release unit (9) which is designed to activate a switch-off unit (3) for switching off the circuit breaker (1) when the release energy (15) is supplied to the release unit (9), and a monitoring unit (13) which is designed to monitor an auxiliary voltage (19) and to supply the release energy (15) stored by the capacitor storage unit (7) to the release unit (9) when the auxiliary voltage (19) falls below a threshold value stored by the monitoring unit (13).