Search

EP-4495973-B1 - SOLID-STATE CIRCUIT BREAKER AND METHOD FOR INSTALLING IT

EP4495973B1EP 4495973 B1EP4495973 B1EP 4495973B1EP-4495973-B1

Inventors

  • HU, YANG
  • HAN, ZHIGANG

Dates

Publication Date
20260506
Application Date
20231124

Claims (11)

  1. A solid-state circuit breaker, wherein a mechanical breakpoint of the solid-state circuit breaker adopts a modular layout, the solid-state circuit breaker comprising: a housing module (10), forming a cavity for accommodating components of the solid-state circuit breaker; a breaking unit module (40), installed in the housing module (10) and comprising a stationary contact fixed to the housing module and a movable contact being movable relative to the stationary contact to realize a connection and a disconnection of a circuit; a mechanism module (20), installed in the housing module (10) and configured to drive an action of the breaking unit module (40); and a transmission module (30), configured to connect the mechanism module (20) and the breaking unit module (40), so that a motion of a moving component in the mechanism module (20) can be transmitted to the movable contact of the breaking unit module (40), wherein the housing module (10), the mechanism module (20), the breaking unit module (40) and the transmission module (30) are independent from each other and are able to be installed and disassembled from each other, characterized in that upon the solid-state circuit breaker being used for a DC application, compared with an AC application, an arc extinguishing grid (41) is arranged in the breaking unit module (40).
  2. The solid-state circuit breaker according to claim 1, wherein the breaking unit module (40) comprises one or more breaking units, and each of the breaking units comprises a stationary contact and a corresponding movable contact.
  3. The solid-state circuit breaker according to claim 2, wherein the solid-state circuit breaker varies according to a number of stages, and a number of breaking units of the breaking unit module (40) depends on the number of stages being adapted.
  4. The solid-state circuit breaker according to any one of claims 1-3, wherein the solid-state circuit breaker varies according to an AC application and a DC application.
  5. The solid-state circuit breaker according to any one of claims 1-3, wherein the transmission module (30) is a transmission shaft, and is configured to connect the moving component of the mechanism module (20) to the movable contact of the breaking unit module (40) so as to transmit motion.
  6. The solid-state circuit breaker according to any one of claims 1-3, wherein the mechanism module (20) comprises an operation handle, the operation handle is configured to be actuated to drive the moving component to move to realize opening and closing.
  7. The solid-state circuit breaker according to any one of claims 1-3 wherein the modular layout of the solid-state circuit breaker is suitable for UL products and IEC products.
  8. A method for installing the solid-state circuit breaker according to any one of claims 1-7, comprising following steps: 1) installing one breaking unit of the breaking unit module (40) to the mechanism module (20); 2) installing the transmission module (30) to connect the mechanism module (20) and the breaking unit module (40); 3) installing the mechanism module (20), the breaking unit module (40) and the transmission module (30) which are assembled with each other to the housing module (10), characterised by upon the solid-state circuit breaker being used for a DC application, compared with an AC application, arranging an arc extinguishing grid (41) in the breaking unit module (40).
  9. The method according to claim 8, wherein the breaking unit module (40) comprises more than one breaking unit, and other breaking units are installed between step 2) and step 3).
  10. The method according to claim 8 or 9, wherein step 1) further comprises installing a connection fixing component, configured to fix a fixed part of the breaking unit module (40) and a fixed part of the mechanism module (20).
  11. The method according to claim 8 or 9, wherein, in step 2), the transmission module (30) connects the moving component of the mechanism module (20) and the movable contact of the breaking unit module (40).

Description

TECHNICAL FIELD The present disclosure relates to a solid-state circuit breaker, and a method for installing the solid-state circuit breaker. BACKGROUND Solid-state circuit breaker controls the opening and closing of a circuit through the principle of an electronic device. Because of its advantages of short breaking time, no electric arc during breaking, long electrical life and no noise, the solid-state circuit breaker is suitable for various applications of AC and DC. The standard requires that solid-state circuit breaker that meet the isolation conditions needs a mechanical breakpoint. At present, the mechanical breakpoints of the solid-state circuit breakers all have an integrated structure, that is, stationary contact and the movable contact, operation handle, etc. are inseparable and directly installed in the same housing, which is not conducive to the switching of different application requirements (AC/DC, different numbers of stages), nor to the maintenance and replacement of internal components. Related technologies are known from EP 0 538 149 A1 and WO 01/67473 A2. SUMMARY The present invention is set out in the appended claims. With regard to the abovementioned problems, according to a first aspect of the present disclosure, a solid-state circuit breaker is provided, which is characterized in that a mechanical breakpoint of the solid-state circuit breaker adopts a modular layout, which includes: a housing module, forming a cavity for accommodating components of the solid-state circuit breaker;a breaking unit module, installed in the housing module and comprising a stationary contact fixed to the housing module and a movable contact being movable relative to the stationary contact to realize a connection and a disconnection of a circuit;a mechanism module, installed in the housing module and configured to drive an action of the breaking unit module; anda transmission module, configured to connect the mechanism module and the breaking unit module, so that a motion of a moving component in the mechanism module can be transmitted to the movable contact of the breaking unit module,wherein the housing module, the mechanism module, the breaking unit module and the transmission module are independent from each other and are able to be installed and disassembled from each other. Because the solid-state circuit breaker according to the present disclosure is modularized, its installation process is simple. Moreover, upon different solid-state circuit breakers being installed, only the corresponding modules need to be selected according to, for example, the stages and AC/DC applications, and the installation steps and methods remain unchanged, so it is very beneficial to the switching of different application requirements (AC/DC, different numbers of stages). In addition, due to the modularization, the maintenance and replacement of internal components are more convenient. The solid-state circuit breaker according to the present disclosure may include one or more features provided in the following. According to an embodiment, the breaking unit module comprises one or more breaking units, and each of the breaking units comprises a stationary contact and a corresponding movable contact. According to an embodiment, the solid-state circuit breaker varies according to a number of stages, and a number of breaking units of the breaking unit module depends on the number of stages being adapted. According to an embodiment, the solid-state circuit breaker varies according to an AC application and a DC application. Upon the solid-state circuit breaker being used for a DC application, compared with an AC application, an arc extinguishing grid is arranged in the breaking unit module. According to an embodiment, the transmission module is a transmission shaft, and is configured to connect the moving component of the mechanism module to the movable contact of the breaking unit module so as to transmit motion. According to an embodiment, the mechanism module comprises an operation handle, the operation handle is configured to be actuated to drive the moving component to move to realize opening and closing. According to an embodiment, the modular layout of the solid-state circuit breaker is suitable for UL products and IEC products. According to a second aspect of the present disclosure, a method for installing the solid-state circuit breaker as described above is provided, and includes the following steps: 1) installing one breaking unit of the breaking unit module to the mechanism module;2) installing the transmission module to connect the mechanism module and the breaking unit module;3) installing the mechanism module, the breaking unit module and the transmission module which are assembled with each other to the housing module. The solid-state circuit breaker according to the present disclosure adopts the modular layout, and the installation process is simple, which is very conductive to the switching of different applic