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CN-122025478-A - Modularized intelligent circuit breaker

CN122025478ACN 122025478 ACN122025478 ACN 122025478ACN-122025478-A

Abstract

The application relates to a modularized intelligent circuit breaker, which relates to the technical field of intelligent power grids and comprises a base, an operation assembly arranged on the base and a front cover fixedly arranged on the front side of the base for protecting the operation assembly; the application discloses a protection assembly, which comprises a base, a protection assembly, a zero sequence transformer, a metering transformer, a plurality of conducting plates, a connecting plate and a yielding notch, wherein the base is provided with the protection assembly and a mounting cavity, the protection assembly comprises a lower shell arranged in the mounting cavity and a top cover fixedly arranged on the front side of the lower shell, the overload protection transformer, the zero sequence transformer and the metering transformer are arranged in the lower shell, the lower shell is provided with the plurality of conducting plates penetrating through the overload protection transformer, the zero sequence transformer and the metering transformer, the two ends of the conducting plates are fixedly provided with the connecting plate and the connecting plate, and the side surface of the mounting cavity, far away from the protection assembly, is provided with the yielding notch.

Inventors

  • LUO YUNFENG
  • HUANG HEMIN
  • CAI QINGHUI

Assignees

  • 浙江索能电气集团有限公司

Dates

Publication Date
20260512
Application Date
20260316

Claims (10)

  1. 1. The modularized intelligent circuit breaker comprises a base (1), an operation assembly (2) arranged on the base (1) and a front cover (3) fixedly arranged on the front side of the base (1) and used for protecting the operation assembly (2), and is characterized in that a protection assembly (4) is arranged on the side surface of the base (1) facing the front cover (3), an installation cavity (11) is formed in the side surface of the base, the protection assembly (4) comprises a lower shell (41) arranged in the installation cavity (11), a top cover (42) fixedly arranged on the front side of the lower shell (41), and an overload protection transformer (43), a zero sequence transformer (44) and a measuring transformer (45) are arranged in the lower shell (41); Install on inferior valve (41) and run through a plurality of conducting strips (46) of overload protection transformer (43), zero sequence transformer (44) and measurement transformer (45), the both ends of conducting strip (46) set firmly extend to inferior valve (41) outside plug connector lug (461) that are connected with protection component (4) respectively, lug (462) that are connected with external cable, the side that protection component (4) were kept away from in installation cavity (11) is equipped with and supplies lug (462) to run through breach of stepping down.
  2. 2. The modularized intelligent circuit breaker according to claim 1, wherein a connecting plate (51) is arranged on the side surface of the top cover (42) facing the yielding gap (12), and a plurality of positioning blocks (52) penetrating through the yielding gap (12) and fixedly connected with the outer side surface of the top cover (42) are fixedly arranged on the connecting plate (51); The utility model discloses a connecting plate, including locating piece (52) and connecting plate (51), connecting plate (51) are kept away from on the side demountable installation has two fixed plates (53), install installation breach (531) on the side that connecting plate (51) were kept away from to fixed plate (53), demountable installation has grip plate (54) that are located installation breach (531), has seted up on grip plate (54) and has supplied the user finger to put into to grip breach (541), elastic pad (542) have set firmly on the inner wall of gripping breach (541).
  3. 3. The modularized intelligent circuit breaker according to claim 2, wherein the fixing plates (53) are rotatably connected with the connecting plates (51), and the two fixing plates (53) are rotated back to a supporting state parallel to the bottom surface of the base (1) and rotated back to a transporting state perpendicular to the bottom surface of the base (1); be provided with on fixed plate (53) to support and transportation state fixed plate (53) spacing locking piece (6), the side that keeps away from base (1) when two fixed plates (53) are in the support state can support the circuit breaker with ground butt, and the user of being convenient for grips when being in the transportation state carries this circuit breaker.
  4. 4. A modular intelligent circuit breaker according to claim 3, wherein the locking member (6) is an elastic locking rod (61) which is fixedly arranged on the side surface of the connecting plate (51) and has elastic elongation performance, two locking inserting blocks (62) are fixedly arranged on the end part of the elastic locking rod (61) facing the fixing plate (53), a supporting block (55) positioned below the locking inserting blocks (62) is fixedly arranged on the fixing plate (53), and a locking slot (551) for the locking inserting blocks (62) to be clamped in is formed in the periphery of the supporting block (55).
  5. 5. A modular intelligent circuit breaker according to claim 3, wherein two opposite side edges of the holding plate (54) are rotatably connected with the inner wall of the opening of the mounting notch (531), and a limiting piece (7) for limiting and locking the rotation state of the holding plate (54) is arranged outside the connecting plate (51); the two holding plates (54) can be rotated to an unfolding state in which the two fixing plates (53) are separated from the mounting notch (531) and are parallel to the fixing plates (53) when the two fixing plates (53) are in a supporting state, and can be rotated to a storage state in which the two fixing plates (53) are positioned in the mounting notch (531) and are parallel to the fixing plates (53) when the two fixing plates (53) are in a transporting state.
  6. 6. The modularized intelligent circuit breaker according to claim 5, wherein the limiting piece (7) comprises a limiting rod (71) which is positioned outside the connecting plate (51) and has adjustable length, limiting inserting blocks (72) which are fixedly arranged on the peripheries of two ends of the limiting rod (71), wherein limiting inserting grooves (543) are formed on the side surfaces, facing the mounting notch (531), of the holding plate (54), and the two limiting inserting blocks (72) are respectively inserted into the limiting inserting grooves (543) on the same side of the two holding plates (54) when the fixing plate (53) is in a supporting state and the holding plate (54) is in a unfolding state; The first slot (511) is fixedly arranged on the outer side face of the connecting plate (51), the second slot (544) is formed in the outer side face of the holding plate (54) in a vertical storage state, and the two limiting inserting blocks (72) are respectively inserted into the first slot (511) and the second slot (544) when the fixing plate (53) is in a transportation state and the holding plate (54) is in a storage state.
  7. 7. The modularized intelligent circuit breaker according to claim 6, wherein the fixing plate (53) close to the base (1) can be turned to a horizontal state, the fixing plate (53) far away from the base (1) is turned to a vertical downward state, the two holding plates (54) are in an unfolding state and fixed by the limiting piece (7), the holding plate (54) close to the base (1) is located below the yielding gap (12), an external cable can penetrate through the holding gap (541) located below the yielding gap (12) and then is connected with the lug plate (462), and the two fixing plates (53) and the holding plates (54) are in a protection state of protecting and limiting cables below the circuit breaker in an application state.
  8. 8. The modularized intelligent circuit breaker according to claim 7, wherein the two holding plates (54) are provided with positioning slots (545) on the side faces facing the inner wall of the mounting notch (531), and the two limiting inserts (72) are respectively inserted into the positioning slots (545) on the same side of the two holding plates (54) when the two fixing plates (53) and the holding plates (54) are in a protective state.
  9. 9. The modular intelligent circuit breaker according to claim 8, wherein the elastic clamping piece (73) is arranged on the periphery of the limiting plug block (72), and positioning grooves (5451) for clamping the elastic clamping piece (73) are formed in the inner walls of the first slot (511), the second slot (544), the limiting slot (543) and the positioning slot (545).
  10. 10. The modular intelligent circuit breaker according to claim 9, wherein the elastic clamping piece (73) comprises a compression spring (731) and an arc-shaped protruding block (732), a placing groove (721) for placing the compression spring (731) and the arc-shaped protruding block (732) is formed in the limiting plug block (72), one side of the arc-shaped protruding block (732) is extruded by the compression spring (731) to enable a part of the arc-shaped protruding block (732) to protrude out of an opening of the placing groove (721), the outer side face of the protruding part of the arc-shaped protruding block (732) is an arc face, and the arc length corresponding to the arc face is a minor arc.

Description

Modularized intelligent circuit breaker Technical Field The application relates to the technical field of intelligent power grids, in particular to a modularized intelligent circuit breaker. Background The intelligent measuring breaker is core terminal equipment of an intelligent power grid automation measuring and controlling system, has integrated and intelligent functional characteristics, and can meet the requirements of real-time monitoring, remote control and rapid fault handling of the power grid running state. Among various intelligent measuring circuit breakers, a molded case circuit breaker becomes one of the most common types of application in a power distribution system by virtue of the advantages of compact structure, excellent protection performance and wide adaptation scene. The circuit breaker is generally composed of a base and a front side shell cover to form a basic frame, two core modules of an operation assembly and a protection assembly are integrated inside, and the double functions of circuit on-off control and electricity safety protection are realized through cooperation between the modules. The operation assembly of the existing molded case circuit breaker takes an electric actuating mechanism as a core, is matched with a transmission connecting rod, a closing retainer and a separating brake release fastener, integrates a position detection sensor and a signal feedback module, can accurately receive intelligent control instructions, and completes remote opening and closing operation. The protection assembly mainly comprises three types of components, namely an overload protection transformer, a zero sequence transformer and a metering transformer, wherein the overload protection transformer is used for monitoring the overload current of a circuit, the zero sequence transformer realizes leakage fault detection, the metering transformer bears an electric energy metering function, and the three types of transformers jointly construct a safety protection and metering monitoring system of the circuit breaker. In the related art, the three groups of transformers including overload protection, zero sequence and metering are required to be respectively installed in different areas of the base, the operating assembly itself comprises more precise parts, and the two groups of transformers are in cross overlapping in the installation space, so that mutual interference is very easy to occur. This layout mode makes base internally mounted space more narrow, and the staff is in the assembly process, not only needs the mounted position of three groups of mutual-inductors of accurate location, still need the moment dodge core wire and other spare part that have preassembled in the casing, has increased the degree of difficulty and the consuming time of assembly operation by a wide margin, has seriously restricted the whole packaging efficiency of circuit breaker, exists the improvement space. Disclosure of Invention The application aims to provide a modularized intelligent circuit breaker, which solves the problems of high assembly difficulty and low efficiency caused by narrow assembly space of a base when three groups of transformers are installed in the related technology. The application provides a modularized intelligent circuit breaker, which adopts the following technical scheme: The modularized intelligent circuit breaker comprises a base, an operation assembly arranged on the base and a front cover fixedly arranged on the front side of the base and used for protecting the operation assembly, wherein a protection assembly is arranged on the side face of the base, which faces the front cover, an installation cavity is formed in the side face of the front cover, the protection assembly comprises a lower shell arranged in the installation cavity and a top cover fixedly arranged on the front side of the lower shell, an overload protection transformer, a zero sequence transformer and a metering transformer are arranged in the lower shell, a plurality of conducting strips penetrating the overload protection transformer, the zero sequence transformer and the metering transformer are arranged on the lower shell, plug-in strips extending to the outer portion of the lower shell and respectively connected with the protection assembly are fixedly arranged at the two ends of the conducting strips, a wiring lug connected with an external cable is arranged on the side face, away from the protection assembly, of the installation cavity, and a yielding notch for the wiring lug to penetrate is formed. By adopting the technical scheme, the three groups of transformers of overload protection, zero sequence and measurement are integrated and preloaded in the protection assembly formed by the lower shell and the top cover, and the conductive sheets penetrating through the three groups of transformers, the two-end inserting sheets and the wiring sheets are matched, so that the modular design of the protection a