漏电保护模块及断路器

Abstract

本实用新型属于低压电器技术领域，具体公开了一种漏电保护模块及断路器。本实用新型提供的漏电保护模块设置于断路器本体的出线端，断路器本体内靠近出线端的位置处设有灭弧室，第一排气孔用于排出灭弧室内的热气流，漏电保护模块的分隔板与壳体的底部之间形成有排气通道，排气通道的一端用于与第一排气孔连通，排气通道的另一端与外部环境连通，断路器本体内的热气流可以通过排气通道有效排出，避免热气流烧损断路器本体内的零部件，延长了断路器本体的使用寿命；此外，零序互感器和导电单元设置于分隔板背离排气通道的一侧，避免热气流流向零序互感器和导电单元而烧损零序互感器和导电单元，延长漏电保护模块的使用寿命。

Claims

1. A leakage current protection module, applied in a DC circuit breaker body (200), wherein the leakage current protection module (100) is disposed at the output terminal (201) of the circuit breaker body (200), and the output terminal (201) of the circuit breaker body (200) is provided with a first vent (202), characterized in that, The leakage protection module (100) includes a housing (1), a partition plate (11) is provided inside the housing (1), an exhaust channel (12) is formed between the partition plate (11) and the bottom of the housing (1), one end of the exhaust channel (12) is used to communicate with the first exhaust hole (202), and the other end of the exhaust channel (12) is connected to the external environment. A zero-sequence current transformer (2) and a conductive unit (3) are provided on the side of the partition plate (11) away from the exhaust channel (12). One end of the conductive unit (3) is used to be electrically connected to the output terminal (201) of the circuit breaker body (200), and the other end of the conductive unit (3) passes through the zero-sequence current transformer (2) to be electrically connected to the external conductor.

2. The arc fault protection module of claim 1, wherein, Each phase outlet of the circuit breaker body (200) is provided with a first exhaust hole (202) respectively. One end of the exhaust channel (12) is provided with an airflow inlet (13). The airflow inlet (13) is provided with the first exhaust hole (202) of each phase of the circuit breaker body (200). The other end of the exhaust channel (12) is provided with a plurality of second exhaust holes (14).

3. The arc fault protection module of claim 1, wherein, The conductive unit (3) includes a first conductive element (31) and a second conductive element (32). One end of the first conductive element (31) is used to be electrically connected to the output terminal (201) of phase A of the circuit breaker body (200). One end of the second conductive element (32) is used to be electrically connected to the output terminal (201) of phase B of the circuit breaker body (200). The other ends of the first conductive element (31) and the other ends of the second conductive element (32) pass through the zero-sequence current transformer (2) respectively for electrical connection with external conductors. One of the first conductive element (31) and the second conductive element (32) is provided with a shunt (33).

4. The arc fault protection module of claim 3, wherein, The shunt (33) is integrally connected with a first terminal block (34) and a second terminal block (35). The first terminal block (34), the shunt (33) and the second terminal block (35) form the first conductive element (31) or the second conductive element (32). The first terminal block (34) is used to electrically connect with the outgoing terminal (201) of the circuit breaker body (200), and the second terminal block (35) is used to electrically connect with external conductors.

5. The arc fault protection module of claim 3, wherein, The other of the first conductive element (31) and the second conductive element (32) includes a flexible connector (36), one end of which is connected to a third terminal block (37), and the other end of which is connected to a fourth terminal block (38). The flexible connector (36) passes through the zero-sequence current transformer (2). The third terminal block (37) is used to electrically connect to the outgoing terminal of the circuit breaker body (200), and the fourth terminal block (38) is used to electrically connect to an external conductor. Alternatively, the other of the first conductive element (31) and the second conductive element (32) may be a plate-like structure.

6. The arc fault protection module of claim 3, wherein, Along the axial direction of the zero-sequence current transformer (2), isolation plates (15) are respectively provided on opposite sides of the zero-sequence current transformer (2), and the isolation plates (15) are placed between the first conductive element (31) and the second conductive element (32).

7. The arc fault protection module of claim 3, wherein, The housing (1) includes a lower housing (16) and a middle housing (17). A partition plate (11) is disposed inside the lower housing (16), and an exhaust channel (12) is formed between the partition plate (11) and the bottom of the lower housing (16). The middle housing (17) is located at the opening of the lower housing (16). The zero-sequence current transformer (2) and the conductive unit (3) are disposed between the bottom of the middle housing (17) and the partition plate (11). The middle housing (17) is provided with The circuit unit (5) is electrically connected to the conductive unit (3) and the conductive unit (3) supplies power to the circuit unit (5). The zero-sequence transformer (2), the trip alarm unit (4) and the shunt (33) are electrically connected to the circuit unit (5) respectively. The circuit unit (5) controls the trip alarm unit (4) to trip according to the current collected by the zero-sequence transformer (2) or the current collected by the shunt (33).

8. The arc fault protection module of claim 7, wherein, The trip alarm unit (4) includes an electromagnetic trip unit (41), which includes a trip push rod (411) and a trip electromagnetic drive unit (412). The circuit unit (5) is used to control the trip electromagnetic drive unit (412) to drive the trip push rod (411) to move toward the circuit breaker body (200), so that the trip push rod (411) passes through the middle housing (17) and the outer shell (203) of the circuit breaker body (200), and triggers the operating mechanism placed inside the circuit breaker body (200).

9. The arc fault protection module of claim 8, wherein, The tripping push rod (411) includes a push rod body (4111) and a transmission rod (4112). The transmission rod (4112) is slidably disposed in a limiting groove (2031) of the outer shell (203) of the circuit breaker body (200). At least one side of the transmission rod (4112) is provided with a protrusion (4113). At least one side wall of the limiting groove (2031) is provided with two limiting blocks (2032) spaced apart. The protrusion (4113) is placed between the two limiting blocks (2032) and is limited by the limiting blocks (2032). One end of the transmission rod (4112) faces the push rod body (4111), and the other end of the transmission rod (4112) faces the operating mechanism. The tripping electromagnetic drive (412) is used to drive the push rod body (4111) to move toward one end of the transmission rod (4112). Alternatively, the tripping push rod (411) includes a push rod body (4111) and a transmission rod (4112), wherein the transmission rod (4112) and the push rod body (4111) are integrally connected, and the end of the transmission rod (4112) facing away from the push rod body (4111) faces the operating mechanism. The tripping electromagnetic drive (412) is used to drive the push rod body (4111) to move the transmission rod (4112) toward the operating mechanism.

10. A circuit breaker characterized by The circuit breaker includes a circuit breaker body (200) and a leakage current protection module (100) according to any one of claims 1-9, wherein the circuit breaker body (200) includes an outgoing terminal (201).

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