Leakage protector and circuit breaker

Abstract

The utility model belongs to low voltage electric appliance technical field, specifically discloses a kind of leakage protector and circuit breaker.The leakage protector provided by the utility model includes conducting unit and zero sequence transformer, the conducting unit includes first conducting part and second conducting part, first conducting part and second conducting part are respectively worn zero sequence transformer, one of first conducting part and second conducting part is provided with shunt, shunt is used to detect direct current, according to the direct current of detection to control whether circuit breaker body is tripped, realize the setting of circuit breaker tripping current, shunt is a kind of low resistance, high-precision resistance, improve the measurement precision of direct current, and low in use cost;Zero sequence transformer is used to detect leakage current, realizes leakage protection.

Claims

1. An electric leakage protector characterized by, The circuit breaker includes a conductive unit (1) and a zero-sequence current transformer (2). The conductive unit (1) includes a first conductive element (11) and a second conductive element (12). The first conductive element (11) and the second conductive element (12) are respectively installed through the zero-sequence current transformer (2). One of the first conductive element (11) and the second conductive element (12) is provided with a shunt (13). The first conductive element (11) is used to electrically connect the A-phase output terminal of the circuit breaker body (200) and the external conductor. The second conductive element (12) is used to electrically connect the B-phase output terminal of the circuit breaker body (200) and the external conductor.

2. The ground fault circuit interrupter of claim 1, wherein, The shunt (13) is integrally connected with a first terminal block (14) and a second terminal block (15). The first terminal block (14), the shunt (13) and the second terminal block (15) form the first conductive element (11) or the second conductive element (12). The first terminal block (14) is used to electrically connect with the outgoing terminal of the circuit breaker body (200), and the second terminal block (15) is used to electrically connect with external conductors.

3. The ground fault circuit interrupter of claim 1, wherein, The other of the first conductive element (11) and the second conductive element (12) includes a flexible connector (16), one end of which is connected to a third terminal block (17), and the other end of which is connected to a fourth terminal block (18). The flexible connector (16) passes through the zero-sequence current transformer (2). The third terminal block (17) is used to electrically connect to the outgoing terminal of the circuit breaker body (200), and the fourth terminal block (18) is used to electrically connect to an external conductor.

4. The ground fault circuit interrupter of claim 3, wherein, An insulating sleeve is fitted on the outside of the flexible connector (16).

5. The ground fault circuit interrupter of claim 1, wherein, The other of the first conductive element (11) and the second conductive element (12) is a plate-shaped structure, and an insulating layer is provided in the middle of the other of the first conductive element (11) and the second conductive element (12).

6. The ground fault circuit interrupter of claim 1, wherein, The zero-sequence current transformer (2) is provided with an insulating shell on its outer side; And / or, the outside of the shunt (13) is wrapped with an insulating layer, and the shunt (13) is placed inside the zero-sequence transformer (2).

7. The ground fault protector of claim 1, wherein, The leakage current protector also includes a lower housing (3), the zero-sequence current transformer (2) and the conductive unit (1) are disposed in the lower housing (3), and the lower housing (3) is provided with two isolation plates (31) spaced apart along the axial direction of the zero-sequence current transformer (2). The two isolation plates (31) are placed on opposite sides of the zero-sequence current transformer (2), and each isolation plate (31) is respectively placed between the first conductive element (11) and the second conductive element (12).

8. The ground fault circuit interrupter of claim 7, wherein, The lower housing (3) is provided with a support base (32), and the support base (32) is recessed with a receiving groove. The shape of the receiving groove is adapted to the surface shape of the zero-sequence transformer (2). The zero-sequence transformer (2) is placed in the receiving groove, and the isolation plates (31) placed on both sides of the zero-sequence transformer (2) abut against the surface of the zero-sequence transformer (2).

9. The ground fault circuit interrupter of claim 7, wherein, The leakage current protector also includes a middle housing (4), which is disposed at the opening of the lower housing (3). The end of the isolation plate (31) facing the middle housing (4) is provided with a plug groove (311), and the side of the middle housing (4) facing the lower housing (3) is provided with a plug block (41), which is inserted into the plug groove (311).

10. A circuit breaker characterized by The device includes a circuit breaker body (200) and a residual current device (100) according to any one of claims 1-9, wherein the circuit breaker body (200) includes two outgoing terminals.

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