CN206628427U - Rccb - Google Patents

Abstract

The utility model relates to a leakage circuit breaker, which comprises a housing, an operating mechanism, an arc extinguishing cover, an electromagnetic system, a connection terminal and a leakage assembly. The leakage housing, the operating mechanism, the electromagnetic system, and the arc extinguishing cover are arranged between the circuit breaker housing and the middle housing. The leakage components are arranged between the leakage housing and the middle housing. The leakage components include zero sequence transformers and leakage disconnectors. The middle housing is provided with a square through hole, the zero sequence transformer is installed through the square through hole, and the circuit breaker terminal board and the leakage terminal board are respectively in the circuit breaker cavity and the leakage cavity Pass through the center of the zero-sequence transformer. The zero-sequence transformer is installed in the through hole on the middle shell, which avoids the redundant wires when connecting the wires, reduces the length of the wires, optimizes the internal structure, and makes the structure more reasonable.

Description

Leakage circuit breakers

technical field

The utility model relates to a circuit breaker, in particular to a leakage circuit breaker.

Background technique

Existing miniature circuit breakers are all equipped with leakage protection devices, which can trip the tripper when leakage occurs, automatically cut off the power supply, and play a role in safety protection. The leakage protection device is mainly composed of a zero-sequence current transformer, an operation controller and an electromagnetic release. The zero-sequence current transformer is mainly used to detect the induced current, and then amplifies the signal through the operation controller, and finally controls the action of the electromagnetic release. Push the locking action to realize the tripping of the circuit breaker, so that the moving contact and the static contact of the circuit breaker are separated. Due to the limited space and unreasonable structure in the housing of the miniature circuit breaker, the sensitivity of leakage tripping is low, and there are potential safety hazards.

Contents of the invention

In view of this, the purpose of this utility model is to provide a leakage circuit breaker, including a housing, an operating mechanism, an arc extinguishing cover, an electromagnetic system, a terminal block, a terminal block and a leakage assembly, the housing includes a middle housing and a set The circuit breaker housing and leakage housing on both sides of the middle housing, the operating mechanism, electromagnetic system and arc extinguishing cover are arranged between the circuit breaker housing and the middle housing, and the leakage components are arranged between the leakage housing and the middle housing Between the bodies, the leakage component includes a zero-sequence transformer and a leakage release, the zero-sequence transformer is installed between the terminal and the leakage release, and the terminal board includes a circuit breaker terminal board and a leakage terminal board, wherein , the circuit breaker terminal board is located in the circuit breaker cavity formed by the middle housing and the circuit breaker housing, the circuit breaker terminal board is connected between the terminal on one side of the circuit breaker housing and the electromagnetic system, and the leakage terminal board is located In the leakage cavity formed by the middle casing and the leakage casing, one end of the leakage wiring board is connected to the terminal on one side of the leakage casing, and the other end is opposite to the movable contact of the leakage casing. The middle casing is provided with A square through hole, the zero-sequence transformer is installed through the square through-hole, and the circuit breaker wiring board and the leakage wiring board respectively pass through the center of the zero-sequence transformer in the circuit breaker cavity and the leakage cavity.

The beneficial effects of the utility model are: the zero-sequence transformer is installed in the through hole on the middle shell, which avoids the redundant wires when connecting the wires, reduces the length of the wires, optimizes the internal structure, and makes the structure more compact.

Description of drawings

Fig. 1 is the schematic diagram of the utility model embodiment.

Fig. 2 is a perspective view of the embodiment of the utility model without the leakage housing and the circuit breaker housing.

Fig. 3 is a front view of the middle casing of the embodiment of the utility model.

Fig. 4 is a schematic diagram of a zero-sequence transformer and a wiring board according to an embodiment of the utility model.

detailed description

As shown in Figures 1-4, a leakage circuit breaker includes a housing, an operating mechanism 4, an electromagnetic system 5, an arc extinguishing cover 6, a terminal 7 and a leakage assembly 8, and the housing includes a middle housing 2 and a middle housing The circuit breaker housing 3 and the leakage housing 1 on both sides of the housing 2, the operating mechanism 4, the electromagnetic system 5, and the arc extinguishing cover 6 are arranged between the circuit breaker housing 3 and the middle housing 2, and the leakage assembly 8 is arranged in the leakage Between the housing 1 and the middle housing 2, the leakage component 8 includes a zero-sequence transformer 82 and a leakage release 81, the zero-sequence transformer 81 is installed between the terminal 7 and the leakage release 81, and the terminal board includes a circuit breaker The circuit breaker terminal board 9 and the leakage terminal board 10, the circuit breaker terminal board 9 is located in the circuit breaker chamber formed by the middle housing 2 and the circuit breaker housing 3, and the circuit breaker terminal board 9 is connected to the connection terminals on one side of the circuit breaker housing and Between the electromagnetic system 5, the leakage terminal board 10 is located in the leakage chamber formed by the middle housing 2 and the leakage housing 1. One end of the leakage terminal board 10 is connected to the terminal on one side of the leakage housing 1, and the other end is connected to the leakage housing 1. The moving contacts inside are opposite to each other. The middle housing 2 is provided with a square through hole 21. The zero sequence transformer 81 is installed through the square through hole 21. The circuit breaker terminal board 9 and the leakage terminal board 10 are respectively connected to the circuit breaker. The cavity and leakage cavity pass through the center of the zero-sequence transformer 81 . The zero-sequence transformer 81 is elliptical and installed in the square through hole 21 of the middle shell 2 transversely. The zero-sequence transformer 82 is installed in the square through hole on the middle shell 2, and the zero-sequence transformer is installed in the through hole on the middle shell, which avoids the redundant wires when connecting the wires, reduces the length of the wiring, and optimizes The internal structure is improved, and the structure is more compact.

Claims (2)

1. a kind of RCCB, including housing, operating mechanism, arc-extinguish chamber, electromagnetic system, binding post, terminal plate and leakage Electrical component, the housing includes central enclosure and the Shell of circuit breaker for being arranged on central enclosure both sides and electric leakage housing, described Operating mechanism, electromagnetic system, arc-extinguish chamber are arranged between Shell of circuit breaker and central enclosure, and electric leakage component is arranged on electric leakage housing Between central enclosure, electric leakage component includes ZCT and leakage tripping device, and the ZCT is arranged on terminals Between son and leakage tripping device, the terminal plate includes wire connection board of circuit breaker and electric leakage terminal plate, it is characterised in that：The open circuit In the breaker chamber that device terminal plate is located at central enclosure and Shell of circuit breaker is formed, wire connection board of circuit breaker is connected to Shell of circuit breaker Between the binding post and electromagnetic system of side, the electric leakage terminal plate is located at central enclosure and the electric leakage chamber that housing is formed that leaks electricity In, described electric leakage terminal plate one end is connected with the binding post for housing side of leaking electricity, other end and the moving contact of electric leakage housing Relatively, a square through hole is provided with the central enclosure, the ZCT is installed through in square through hole, described Wire connection board of circuit breaker passes through ZCT center in breaker intracavitary and electric leakage intracavitary respectively with electric leakage terminal plate.

2. RCCB according to claim 1, it is characterised in that：The ZCT is ellipse, laterally peace In the square through hole of the central enclosure.