6results about How to "Improve arc extinguishing performance" patented technology

This utility model relates to the field of arc extinguishing devices and discloses a high-voltage narrow-slit pressurized arc extinguishing device, including an arc extinguishing shell, a mounting frame, an arc extinguishing assembly, and two first gas generating components. The bottom of the arc extinguishing shell is provided with a gas generating port, and the two first gas generating components are symmetrically arranged on both sides of the gas generating port. When the circuit breaker is tripped, the moving contact swings, causing the electric arc on it to enter between the two first gas generating components through the gas generating port. The arc extinguishing assembly is disposed on the mounting frame and is used to extinguish the electric arc between the two first gas generating components. A narrow slit is formed between the two first gas generating components, which makes the arc heat more concentrated, increases the arc voltage, accelerates the pyrolysis rate of the gas generating material, and generates more arc extinguishing gas per unit time, thereby improving the arc extinguishing effect.

This utility model belongs to the field of low-voltage electrical appliance technology and discloses a contact system and an automatic transfer switch. The contact system includes a housing and a contact assembly. The contact assembly includes a first stationary contact, a second stationary contact, and a moving contact disposed on the housing. The housing contains a first arc-extinguishing chamber and a second arc-extinguishing chamber. By providing corresponding arc-extinguishing chambers for the first and second stationary contacts, at least a portion of the first end of the moving contact corresponding to the first stationary contact is located within the first arc-extinguishing chamber, and at least a portion of the second end of the moving contact corresponding to the second stationary contact is located within the second arc-extinguishing chamber. Corresponding exhaust channels communicating with the arc-extinguishing chambers are provided, allowing energy generated on the first side to enter the first exhaust channel from the first arc-extinguishing chamber and be discharged through two first exhaust ports, and energy generated on the second side to enter the second exhaust channel from the second arc-extinguishing chamber and be discharged through two second exhaust ports. This avoids energy accumulation inside the housing, improves energy discharge efficiency, and effectively enhances the arc-extinguishing effect and equipment reliability.

This invention relates to the field of power distribution switchgear technology, and particularly to a load switch operating mechanism for a ring main unit, comprising a switch operating shaft, a grounding operating shaft, an energy storage component, and a limit component. The switch operating shaft is coaxially arranged with the switch drive shaft, and a first drive dial is located at its end; the grounding operating shaft is parallel to it above, and a second drive dial is located at its end. The energy storage component is pivotally connected to the switch drive shaft and the grounding operating shaft at both ends, respectively, enabling it to correspondingly perform closing and grounding energy storage and achieve rapid energy release during opening. The limit component includes a first driven dial, a second driven dial, a first limit arm, and a second limit arm. The two limit arms are respectively located above and below the first driven dial, ensuring reliable overshoot and rebound prevention when the switch is in the closed position performing an opening action; and reliable overshoot prevention when opening from the grounding position. When closing, the switch operating shaft rotates forward to unlock and store energy; when opening, it rotates backward to release energy and prevent overshoot and rebound; when grounding, the grounding operating shaft rotates backward to unlock and store energy.

This application provides an arc-extinguishing system and a circuit breaker, belonging to the field of electrical equipment technology. The arc-extinguishing system provided in this application includes a stationary contact, an arc-extinguishing chamber, and a stationary cover. The stationary contact includes a fixed part and a contact part connected to each other. The fixed part is connected to the base of the circuit breaker, and the contact part has a guide groove that extends through the contact part. The arc-extinguishing chamber is disposed on the contact part. The stationary cover is disposed on the portion of the contact part that does not contact the arc-extinguishing chamber. A hook and a limiting block are provided on the side of the stationary cover facing the contact part. The hook passes through the guide groove and hooks to the side of the contact part facing away from the stationary cover. The limiting block is located within the guide groove and contacts the groove wall. The stationary cover mentioned in this application can limit the position of the stationary cover in the thickness, length, and width directions of the stationary contact, reducing the probability of changes in the relative position between the stationary cover and the stationary contact. This improves the shielding efficiency of the stationary cover on the contact part, thereby increasing the reliability of the arc-extinguishing system.

This utility model relates to an enhanced active fuse, comprising a housing, within which, from top to bottom, are sequentially arranged an excitation device, a power module, a conductor bar, and at least one cooling chamber. The portion of the conductor bar located within the housing has at least one reinforcing element. A heat-absorbing portion is disposed within the cooling chamber. The housing and the conductor bar are fixed together by a coupling. This utility model significantly improves arc extinguishing efficiency through two different arc extinguishing methods: gas-pressurized arc extinguishing by the reinforcing element and arc extinguishing by melting and absorbing heat by the heat-absorbing portion. Simultaneously, the sealing structure and coupling on the conductor bar enhance airtightness, thereby improving the arc extinguishing effect and reliability of the fuse under complex operating conditions, and extending its service life.

Residual current circuit breaker, including shell, residual current module, L pole unit and N pole unit, residual current module includes electronic component board, zero sequence transformer and residual current operating release; N pole unit includes first N pole terminal, N pole moving contact, N pole static contact and second N pole terminal, further includes N pole operating mechanism and N pole short circuit protection device. Residual current circuit breaker of the application, through N pole inner compact structure, reasonable layout, N pole operating mechanism is obliquely arranged above and right side of residual current operating release, and above N pole moving contact, make the lower part of residual current operating release and the space between second N pole terminal and N pole static contact is sufficient, make N pole can set electronic component board, residual current operating release and at least part zero sequence transformer, also can have short circuit protection device and operating mechanism, not only have short circuit protection, also improve the reliability of N pole contact closing contact.