7results about How to "Avoid reignite" patented technology

The invention relates to the technical field of low-voltage electric appliance manufacturing, in particular to a contact arc extinguishing system and a circuit breaker, which comprises an arc extinguishing assembly, a static contact is arranged in the arc extinguishing assembly, a movable contact capable of rotating is arranged in the arc extinguishing assembly, and the static contact and the movable contact can be in contact or separated operation. The arc extinguishing assembly comprises an arc extinguishing chamber and a protective cover; arc-isolating walls are arranged on two sides of the arc-extinguishing chamber; a first arc-extinguishing grid sheet, a second arc-extinguishing grid sheet, a third arc-extinguishing grid sheet and a fourth arc-extinguishing grid sheet are arranged between the two arc-isolating walls; each second arc-extinguishing grid sheet is provided with a first inclined plane and a second inclined plane, a first gap is arranged at the joint of the first inclined plane and the second inclined plane, the first gap is deviated to one side of the second arc-extinguishing grid sheet, and the second arc-extinguishing grid sheets are sequentially arranged in a staggered manner according to the position of the first gap. The projection of the first gap on the plane where the first arc extinguishing grid sheet is located is located in the first arc extinguishing grid sheet.

The utility model belongs to the technical field of low-voltage apparatuses, and discloses a switching apparatus. The switching device comprises a static contact, a moving contact, an operating mechanism, a contact support and an opening distance locking device, the operating mechanism drives the moving contact and the static contact to be opened and closed through the contact support, and the distance between the moving contact and the static contact is a first opening distance K1 when the moving contact and the static contact are driven by the operating mechanism to be opened. The opening distance locking device is used for locking the moving contact which is repelled by the short-circuit current, the opening distance locking device comprises a locking part, the moving contact moves to the locking part after being repelled, the locking part is used for locking the moving contact at the position where the distance between the moving contact and the static contact is a second opening distance K2, and the second opening distance K2 is larger than the first opening distance K1. According to the switching device, the opening distance of the contacts when short-circuit current occurs is increased, lengthening and breaking of an electric arc are facilitated, and meanwhile, the situation that the moving contact is reset and the distance between the moving contact and the static contact is too close to cause electric arc reignition can be prevented.

The invention relates to an improvement of a tripping mechanism of the circuit breaker, and specifically designs an improvement of the tripping mechanism of the circuit breaker, and utilizes the Holm force and the Lorentz magnetic force generated by a short-circuit current to quickly repel a moving contact. When the moving contact is repelled, the repelled movement of the moving contact is utilized to design a tripping combined structure transmission so that a tripping half-shaft and a jumper piece are directly unfastened, thereby shortening the mechanism response time, improving the ability to cut off the fault current, and reducing the impact of the fault current on the system. In addition, by using a connecting rod transmission direct tripping mode, it is avoided that the contact is reclosed with the static contact after being repelled, thereby preventing the arc from reigniting, reducing the contact burning, and reducing the difficulty of arc extinguishing.

The application discloses a kind of hybrid signal injection type capacitance current compensation method, system, equipment and medium based on parameter self-correction, is specifically related to electrical automation and digital technology field.The method comprises: by main station to distribution network inject wideband signal, response signal and zero sequence signal are collected by column device;Based on U1, I1 data, using improved recursive least square method on-line real-time identification line equivalent capacitance and resistance to ground, realize parameter self-correction;According to zero sequence voltage amplitude automatic switching signal injection method and displacement voltage method calculate capacitance current, and utilize Kalman filtering to carry out data fusion calibration;Finally based on identification parameter, through parameter-compensation amount mapping model dynamic determination arc suppression coil adjustment step size, carry out fast closed loop compensation.The application realizes on-line real-time identification and self-correction of distribution network capacitance parameter to ground, reaches fast, accurate compensation capacitance current under all-weather operation condition, ensures that system residual flow meets requirements.

The invention discloses a large-current high-breaking plug-in circuit breaker, comprising a moving contact, a stationary contact, an arc extinguishing chamber, an arc-strike assembly and an arc-guiding acceleration structure arranged on a shell structure. The arc-strike assembly is arranged on both sides of an arc-entry opening in the length direction of the arc-extinguishing chamber. The arc-guiding acceleration structure comprises a magnetizing assembly arranged on both sides of the arc-entry opening in the width direction, and an arc-guiding channel surrounding the moving and stationary contacts, which is formed by connecting the magnetizing assembly, the arc-strike assembly and the shell structure. The cross-sectional width of the arc-guiding channel gradually decreases from the arc-entry opening to the moving contact side. The arc is further accelerated to move in the direction of the arc-entry opening by forming an air pressure difference in the arc-guiding channel and by the magnetic blowing effect of the magnetizing assembly on the arc. The arc-strike efficiency is high and the cooling of the arc can be accelerated by the combined effect of the arc-guiding channel and the magnetizing assembly, thereby avoiding the burning of other parts such as the contacts by the arc, and improving the electrical life and breaking capacity of the circuit breaker.

The present invention relates to an arc extinguishing chamber dedicated to a switching reactor and a method of using the same, wherein the arc extinguishing chamber dedicated to a switching reactor comprises an arc extinguishing chamber unit, a fast closing unit and a resistor-capacitor unit, the arc extinguishing chamber unit comprises a first insulating support tube fixedly connected with a first static contact unit and a first moving contact unit, the first static contact unit comprises a first static contact, and the first moving contact unit comprises a first moving contact arranged opposite to the first static contact; the fast closing unit comprises a second insulating support tube and a second moving contact slidably connected in the second insulating support tube, a transmission device connected to a transmission rod and driving the second moving contact to move is provided in the second insulating support tube, and a compressible static contact electrically connected to the resistor-capacitor unit is provided in the fixed seat. When the arc extinguishing chamber unit of the present invention is disconnected, the overvoltage generated during disconnection is reduced due to the input of the resistor-capacitor unit, and the generation of re-breakdown and re-ignition is avoided; when closed, the resistor-capacitor unit is isolated, and the service life of the resistor-capacitor unit is increased.

The application belongs to the technical field of fuses, in particular to an outdoor high-voltage current-limiting fuse, comprising an epoxy tube; the upper and lower ends of the epoxy tube are respectively sleeved with an upper locking ring and a lower locking ring, a static contact is arranged on the upper locking ring, the static contact is installed below an anti-icing cover through bolts, and a first spring is installed on the static contact; in the application, a striker is independently arranged in a support column, a trigger branch and a main fuse passage are separated in structure, assembly complexity and interference risk in operation caused by passing of a constantan wire through a hole in the support column in traditional design are avoided; meanwhile, a connecting cavity and a plug-in connector structure are arranged in a connecting piece at the lower end, and a connecting wire in a rotating seat is matched, stable electrical leading-out is realized, and through a rotatable connecting frame design, the fuse is allowed to flexibly adjust an installation angle according to the direction of incoming and outgoing lines on site, and construction and maintenance in a complex outdoor environment are greatly facilitated.