Mutual inductor assembly for circuit breaker

Abstract

A mutual inductor assembly used for a circuit breaker comprises a pedestal, the pedestal is internally provided with a detachable baffle plate, and the baffle plate divides the pedestal into an operation area and a detection area along a phase line direction; the current transformer, the electric leakage transformer and the metering transformer are sequentially arranged along the phase line direction. The interior of the molded case circuit breaker is divided into two mutually isolated spaces through the baffle, the influence of strong current on the mutual inductors is avoided as far as possible, the space of a detection area can be increased, metering, electric leakage and current mutual inductors can be conveniently placed, and the utilization rate of the internal space of the circuit breaker can be better achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to a mutual inductor assembly for a circuit breaker. Background Art

[0002] Molded case circuit breakers (MCCBs), core control and protection components in low-voltage power distribution systems, are primarily used to protect lines from electrical faults such as overloads and short circuits. With the development of smart grids and the ubiquitous power Internet of Things (IoT), the intelligentization of MCCBs is becoming an inevitable trend in the industry. Power metering, as one of the functions of intelligent MCCBs, requires the ability to measure parameters such as current, voltage, power, electricity, and harmonics.

[0003] Existing intelligent molded case circuit breakers integrate metering components into the circuit breaker body. However, due to the space limitations of the circuit breaker body and the influence of the existing leakage transformer and current transformer inside, the components inside the circuit breaker are crowded and the internal lead arrangement is chaotic, posing risks such as breakage and interference. This makes the production and assembly of the circuit breaker more difficult and reduces the reliability of the circuit breaker operation. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention provides a mutual inductor assembly for a circuit breaker.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A transformer assembly for a circuit breaker, comprising:

[0007] A base, wherein a detachable baffle is provided in the base, and the baffle separates the base into an operating area and a detection area along the phase line direction;

[0008] Current transformers, leakage transformers and metering transformers are arranged in sequence along the phase line direction.

[0009] There are three current transformers.

[0010] A positioning groove is provided on the side wall of each phase line space of the base, and two sides of the current transformer are inserted into the positioning groove.

[0011] There are three metering transformers, which are respectively sleeved on the outside of the terminal board in the corresponding phase line space.

[0012] The base is provided with a plurality of slots, and the baffle is embedded in the slots to divide the base into two areas.

[0013] The baffle is provided with through holes at intervals for the wiring board to pass through and enter the operation area.

[0014] The arrangement order of the metering transformer and the leakage transformer can be changed.

[0015] The beneficial effects of the utility model are as follows: by utilizing a baffle to separate two mutually isolated spaces inside the molded case circuit breaker, the influence of strong electricity on the mutual inductor can be avoided as much as possible, the space of the detection area can be increased, and it is convenient to place metering, leakage and current mutual inductors, and the utilization rate of the internal space of the circuit breaker can be better realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the present utility model.

[0017] Figure 2 It is the main view of the utility model.

[0018] Figure 3 It is a partial structural diagram of the base of the utility model.

[0019] Figure 4 This is a schematic structural diagram of the baffle of the present utility model. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] like Figure 1 and Figure 2 As shown, the utility model discloses a transformer assembly for a circuit breaker, which mainly utilizes the space of a conventional molded case circuit breaker, maximizes the use of the internal space while ensuring that the size of the molded case circuit breaker remains unchanged, and realizes the simultaneous setting of metering, leakage and current transformers.

[0023] It includes two spaces separated by a baffle, namely the operating area 2000 and the detection area 1000. The operating area is used to place moving and static contacts, operating mechanisms and arc extinguishing chambers, while the detection area is used to place various mutual inductors.

[0024] The base 100 is provided with a detachable baffle 200, and the baffle 200 separates the base 100 into an operating area 2000 and a detection area 1000 along the phase line direction, wherein the base 100 is provided with a plurality of slots 120, and the baffle 200 is embedded in the slots 120 and divides the base into two areas. The baffle realizes strong electrical isolation of the two areas to ensure that the transformer is not damaged by strong electric shock.

[0025] The current transformer 300, the leakage transformer 400 and the metering transformer 500 are sequentially arranged along the phase line direction.

[0026] There are three current transformers 300, which are respectively arranged on the outside of the terminal blocks in each phase line space, that is, the terminal blocks are arranged through the current transformers. At the same time, positioning grooves 110 are provided on the side walls of each phase line space of the base 100, and the two sides of the current transformers 300 are inserted into the positioning grooves 110.

[0027] By utilizing the structural characteristics of the current transformer itself and adapting it to the positioning groove, the current transformer can be placed as close as possible to the wiring position of the terminal board, saving the occupation of the internal detection area and allowing more installation space for the metering transformer and leakage transformer.

[0028] There are three metering transformers 500 , which are respectively mounted outside the terminal blocks 600 in the corresponding phase line spaces, so that each phase line component is independently tested.

[0029] The baffle is provided with through holes 210 at intervals for the terminal block to pass through and enter the operating area, wherein a wiring harness can be directly connected to the terminal block located in the detection area through the through holes to achieve electrical connection between the terminal block and the moving contact in the operating area.

[0030] The arrangement order of the metering transformer 500 and the leakage transformer 400 can be changed, and preferably, there is no restriction on the arrangement order of the metering transformer and the leakage transformer.

[0031] The embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims

1. A transformer assembly for a circuit breaker, characterized in that: It includes: A base (100), wherein a detachable baffle (200) is provided in the base (100), and the baffle (200) separates the base (100) into an operating area (2000) and a detection area (1000) along a phase line direction; A current transformer (300), a leakage transformer (400), and a metering transformer (500) are sequentially arranged along the phase line direction.

2. The mutual inductor assembly for a circuit breaker according to claim 1, characterized in that: There are three current transformers (300).

3. A transformer assembly for a circuit breaker according to claim 1 or 2, characterized in that: Positioning grooves (110) are provided on the side walls of each phase line space of the base (100), and both sides of the current transformer (300) are inserted into the positioning grooves (110).

4. The mutual inductor assembly for a circuit breaker according to claim 1, characterized in that: There are three metering transformers (500), which are respectively sleeved on the outside of the terminal blocks (600) in the corresponding phase line spaces.

5. The mutual inductor assembly for a circuit breaker according to claim 1, characterized in that: A plurality of slots (120) are provided on the base (100), and the baffle (200) is embedded in the slots (120) and divides the base into two areas.

6. A transformer assembly for a circuit breaker according to claim 1 or 5, characterized in that: The baffle is provided with through holes (210) at intervals for the wiring board to pass through and enter the operating area.

7. The mutual inductor assembly for a circuit breaker according to claim 1, characterized in that: The arrangement order of the metering transformer (500) and the leakage transformer (400) can be changed.

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