CN111312563A - A circuit breaker with interpole connection structure - Google Patents

Abstract

The invention discloses a circuit breaker with an inter-pole connection structure, comprising: a main body part and an inter-pole connection part, the main body part includes a circuit breaker body with at least three-phase mutual isolation spaces, and the interior of each phase includes a static contact The electrical conductor of the head and the moving contact, the inter-pole connection part includes a connecting row, the connecting row is arranged outside the main body part, and one end of the connecting row is connected to the conductor of one phase, and the other end is connected to the electrical conductor of one phase. The conductors of the other phases are connected; the insulator completely isolates the inter-pole connection from the circuit breaker body, eliminating the influence of the inter-pole connection on the circuit breaker body and greatly improving the insulation level; after the inter-pole connection is isolated , The heat generated by the conductive row connected between the poles is in an independent space, and the heat dissipation effect is good. Long-term energization has no effect on the parts and characteristics of the circuit breaker body.

Description

A circuit breaker with interpole connection structure

technical field

The invention relates to the technical field of low-voltage electrical appliances, in particular to a circuit breaker with an inter-pole connection structure.

Background technique

my country's photovoltaic power generation industry has been developing for more than 30 years. Especially since 2009, in order to digest the excess photovoltaic capacity, the state has accelerated the industrialization and large-scale development of domestic photovoltaic power generation in various ways. At present, my country's photovoltaic industry has reached the world's leading level in terms of technology, industrial scale and application methods.

With the rapid development of the photovoltaic power generation industry, higher requirements are put forward for low-voltage electrical components, and higher requirements are also placed on the performance indicators of electrical protection components. The rated working voltage of the photovoltaic system voltage exceeds DC1000V. With the increase of the rated voltage, only the photovoltaic DC molded case circuit breaker with the rated voltage of more than DC1500V can meet the higher demands of users.

At present, most of the cascading methods used in the market increase the rated working voltage of the DC circuit breaker. Cascading is to connect the three poles of the circuit breaker in series through the same level or two-level arrangement.

The cascading has the following problems: first, insulation: when the shape of the circuit breaker remains unchanged, the cascading leads to insufficient creepage distance and electrical clearance, which reduces the insulation performance of the circuit breaker; second, temperature rise: this cascading structure can To meet the requirements of the working voltage, but the series connection is bound to increase the resistance of the contact circuit, the heat accumulation here increases, and the high temperature directly affects the operating characteristics of the bimetallic strip as the delay release and the working performance of other components.

SUMMARY OF THE INVENTION

Purpose of the invention: In order to overcome the deficiencies of the prior art, the present invention provides a circuit breaker with an inter-pole connection structure, which solves the problems of low insulation performance and poor heat dissipation effect of the existing circuit breaker.

Technical solution: The present invention discloses a circuit breaker with an inter-pole connection structure, comprising: a main body part and an inter-pole connection part, the main body part includes a circuit breaker body with at least three-phase mutually isolated spaces, and each phase includes A conductor with a static contact and a movable contact, the inter-pole connection portion includes a connection row, the connection row is arranged outside the main body portion, and one end of the connection row is connected to the conductor of a phase, The other end is connected to the conductor of one of the other phases.

Further, include:

The main body portion further includes an insulating member disposed on the lower back surface of the circuit breaker body.

Further, include:

The interpole connection part further includes an insulating cover, which is fixedly installed with the circuit breaker body, and forms an accommodating space with the lower back surface of the circuit breaker body.

Further, include:

The connecting row is arranged on the lower back of the circuit breaker body.

Further, include:

The connecting row is arranged below the insulating member to achieve complete isolation of the connecting row and the circuit breaker body.

Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: (1) The insulating member completely isolates the inter-pole connection structure from the circuit breaker body, thereby preventing the influence of the inter-pole connection structure on the circuit breaker body, greatly reducing the impact of the inter-pole connection structure on the circuit breaker body. Improve the insulation level; (2) After the inter-pole connection structure is isolated, the heat generated by the inter-pole connection conductive bar is in an independent space, and the heat dissipation effect is good, and long-term power-on has no effect on the parts and characteristics of the circuit breaker body; (3) New The installation length of the circuit breaker is only the length of the circuit breaker body, and no additional end insulation measures are required, thus reducing the requirements for the installation space of the circuit breaker in the cabinet.

Description of drawings

1 is a top view of a circuit breaker according to an embodiment of the present invention;

FIG. 2 is a bottom view of the insulating cover half-sectioned according to an embodiment of the present invention;

3 is an exploded view of a circuit breaker according to an embodiment of the present invention;

4 is a schematic diagram of an insulating member according to an embodiment of the present invention;

5 is a schematic structural diagram of a fixing member according to an embodiment provided by the present invention;

6 is a schematic structural diagram of a connecting row according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a switching bank according to an embodiment of the present invention;

8-9 are the selection methods of two different pole connection points provided by the present invention.

The figure includes: main body 1, circuit breaker body 11, lower back surface 111, insulating member 12, boss 121, opening slot 122, interpole connecting part 2, connecting row 21, A end 211, through hole 2111, B end 212, the connecting section 213, the first turning part 214, the second turning part 215, the insulating cover 22, the buckle part 221, the adapter row 3, the first fixing part 31, the first mounting hole 311, the bending part 32, the first Two fixing parts 33 , fixing piece 4 , upper boss 41 , middle section 42 , lower boss 43 .

Detailed ways

The embodiments of the present invention are described below by specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the structures, proportions, sizes, etc. shown in the drawings in this specification are only used to cooperate with the contents disclosed in the specification, so as to be understood and read by those who are familiar with the technology, and are not used to limit the implementation of the present invention. Restricted conditions, it does not have technical substantive significance, any structural modification, proportional relationship change or size adjustment, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the present invention. The scope of the disclosed technical content can be covered. At the same time, the terms such as "up", "down", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and clarity, and are not used to limit this specification. The implementable scope of the invention, and the change or adjustment of the relative relationship thereof, shall also be regarded as the implementable scope of the present invention without substantially changing the technical content.

As shown in FIG. 1 , the present invention provides a circuit breaker with an inter-pole connection structure, comprising: a main body part 1 and an inter-pole connection part 2 , the inter-pole connection part 2 includes a connection row 21 and an insulating cover 22 , and the main body part 1 at least The circuit breaker body 11 with three-phase space isolated from each other, each phase includes a conductor with a static contact and a moving contact, and the inter-pole connecting part 2 includes a connecting row 21 , and the connecting row 21 is arranged outside the main body part 1 . , and one end of the connecting row 21 is connected with the conductor of one phase, and the other end is connected with the conductor of the other phase. The conductor described in this application may include a static contact, a moving The conductive parts and the conductive parts connected with the moving contacts.

Therefore, the following cases are included:

(1) One end of the connecting row 21 is firmly connected to the static contact of one phase, and the other end is connected to the static contact of another phase;

(2) One end of the connecting row 21 is firmly connected with the static contact of one phase, and the other end is connected with the moving contact of the other phase;

(3) One end of the connecting row is directly connected to the static contact of one phase, and the other end is connected to the moving contact of the other phase through a conductive member;

(4) One end of the connecting row is directly connected to the moving contact of one phase, and the other end is connected to the moving contact of another phase through a conductive component;

(5) One end of the connecting row is directly connected to the static contact of one phase, and the other end is connected to the static contact of another phase through a conductive member;

The above-mentioned various combinations can realize the connection between poles, and the connection row 21 makes different poles connect in series to form a conductive loop.

Further, the present embodiment adopts a three-pole circuit breaker, which are denoted as one, two and three poles respectively. The connecting row 21 is installed outside the circuit breaker body 11 and includes an A terminal 211 and a B terminal 212 corresponding to the A terminal 211 . , including the following interpole connections:

The connection between the static and moving contacts: the A terminal 211 is connected and fixed to the static contact of the third pole of the circuit breaker, or it can be connected through a conductive part connected to the static contact, and the B terminal 212 is placed on the second pole of the circuit breaker, and The B terminal is directly connected to the movable contact of the second pole, or can be fastened through a conductive member connected to the movable contact. The connection between the A terminal and other components can be set to have a through hole 2111 at the A terminal. Connect as shown in Figure 2.

Static contact pole-to-pole connection: A terminal 211 is connected and fixed to the static contact of the third pole of the circuit breaker, and can also be connected through a conductive component connected to the static contact, B terminal 212 is placed on the second pole of the circuit breaker, and The B terminal is directly connected to the static contact of the second pole, or can be tightly connected by a conductive part connected to the static contact.

Inter-pole connection of the moving contact: A terminal 211 is connected and fixed with the moving contact of the third pole of the circuit breaker, or can be connected through a conductive part connected to the static contact, and the B terminal 212 is placed on the second pole of the circuit breaker, and The B terminal is directly connected to the movable contact of the second pole, or can be fastened through a conductive component connected to the movable contact. The connection between the A terminal and other components can be configured to have a through hole at the A terminal.

Specifically, a connecting segment 23 is also provided between the AB ends of the connecting row 21, which is connected between the A end 21 and the B end 22. Since it needs to cross different poles, it can be set as a hook-shaped structure, or can be set as Other structures that can implement this function.

Further, the main body 1 of this embodiment further includes an insulating member 12, which is arranged between the circuit breaker body 11 and the connecting row 2, and is isolated by the insulating member, thereby improving the insulating performance of the circuit breaker. Specifically, the insulating member 12 is mounted and fixed to the outer surface of the circuit breaker body 11 .

Further, in order to make the installation length of the circuit breaker only the length of the circuit breaker body 11, and to facilitate the disassembly of the connection row, the connection row 21 is arranged on the lower back surface 111 of the circuit breaker body 111. As shown in FIG. 2, the connection row The A terminal 211 of 2 is connected and fixed to the static contact of one pole of the circuit breaker through the lower back surface 111, and the B terminal 212 is fixed to the other pole of the circuit breaker through the lower back surface 111. The connection method can be in the following ways, but not limited to the following: The connection method described above, the connection between other static contacts and static contacts, and the connection between moving contacts and moving contacts can all use this connection method, which will not be repeated here:

1. A through hole 2111 is opened in the static contact part of the A terminal 211, and the A terminal 211 is fixed on the lower back surface corresponding to the static contact, and the moving contact of the B terminal 212 is opened, and the B terminal 212 is fixed on the On the lower back surface corresponding to the moving contact;

2. A through hole 2111 is opened in the static contact part of the A end 211, and the A end 211 is fixed on the lower back surface 111 corresponding to the static contact, and the B end 212 and the moving contact are fixed by the transfer row 3. The connecting bar 3 is a specific part of the above-mentioned conductive components. The connecting bar 3 is installed on the inner surface of the main body 1 , and the other end of the connecting bar 3 is connected to the moving contact of the pole where the B end 22 is located.

3. A through hole is opened in the moving contact part of the B end 212, and the B end 212 is fixed on the moving contact. The A end 211 and the static contact are fixed by the adapter row 3, and the adapter row 3 is the above-mentioned As a specific part of the conductive component, the other end of the transfer row 3 is connected to the static contact of the pole where the A terminal 22 is located.

The cross section of the adapter row 3 along the length direction D is stepped, and includes a first fixing part 31, a bending part 32 and a second fixing part 33 connected in sequence. The B-end 212 is fixedly installed, and the second fixing portion 331 is provided with a plurality of second installation holes, which are connected to the moving contacts of the circuit breaker.

For example, the connection between the A terminal 211 and the static contact can be fixed by using the fixing member 4 to fix the A terminal 211 and the static contact of the third pole of the circuit breaker corresponding to the A terminal 211 together, so as to form the second pole and the third pole. poles in series.

The fixing member 4 can be configured as a cylinder, which includes an upper boss 41 , a middle section 42 and a lower boss 43 connected in sequence, and the diameter of the inscribed circle where the middle section 42 is located is larger than the diameter of the outer circle where the upper boss 41 is located and the lower boss 43 . The diameter of the outer circle where the boss 43 is located, correspondingly, the diameter of the through hole 2111 opened at the A end of the inter-pole connection conductive row is also smaller than the diameter of the circle where the middle section 42 is located. The firmness of the parts mounted on the bosses and other parts also increases the contact surface of the current flowing through the fixing parts. This embodiment does not limit the specifics of the fixing parts 4, as long as the connection row and the insulating cover can be fixed. .

Further, a first turning portion 214 is further provided between the A end 211 of the coupling row 21 and the connecting section 23 , and a second turning portion 215 is also provided between the B end 212 and the connecting section 213 , and the first turning portion 214 is connected relative to each other. The segment 213 has a certain slope, and the second turning portion 215 also presents a certain slope relative to the connecting segment 213. The first turning portion 214 and the second turning portion 215 make the AB end abut against the lower surface 111 of the circuit breaker body 11, and the connecting segment A certain distance is left between the 213 and the circuit breaker body 11 .

The insulating member 12 is clamped in the space between the lower back face 11 and the connecting row 2 . In order to achieve complete isolation of the connecting row 21 and the circuit breaker main body 11 , the insulating member 12 is arranged to cover the mounting screws on the lower back face 11 .

In order to improve the insulation of the circuit breaker, a plurality of bosses 121 are provided on the surface of the insulating member 12 in contact with the lower back surface 11 . The bosses 121 are in contact with the lower back surface 111 . The influence of the installation screw on the connection between the stages and the poles, after the insulation is added to the back of the switch, greatly improves the insulation level.

Symmetrical opening slots 122 are provided on both sides along the length direction C of the insulator body, which are installed in cooperation with the insulating cover 22 of the circuit breaker. The two sides of the insulating cover 22 are provided with snap portions 221. The snap portions 221 It is matched with the opening slot 122 .

The insulating cover 22 has the same length and width as the main body, and is provided with mounting holes of the same size as the position of the main body. After the main body of the connecting row is fixed, the insulating cover 22 is installed on the circuit breaker body 11 to form a certain accommodating space, and the insulating member and the connecting row are placed in the space.

Therefore, after the inter-pole connection parts are isolated, the heat generated by the connecting bar 21 is in a separate space, the heat dissipation effect is good, and the heat transmitted to the inside of the circuit breaker is less, which reduces the influence on the delayed tripping.

Provide reliable connection solutions according to different wiring requirements of customers. At present, there are various connection solutions for wiring methods on the market, as shown in Figure 8 and 9. In this embodiment, the wiring method in FIG. 8 can be implemented. If the customer needs other wiring methods, other wiring methods in FIG. 9 can be implemented by changing the connection row.

The above-mentioned embodiments merely illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed in the present invention should still be covered by the claims of the present invention.

Claims (5)

1. A circuit breaker having an inter-pole connection structure, comprising: the circuit breaker comprises a main body part (1) and an inter-pole connecting part (2), wherein the main body part (1) comprises a circuit breaker body (11) at least provided with three-phase mutual isolation spaces, each phase of the circuit breaker body internally comprises a conductor with a fixed contact and a movable contact, the inter-pole connecting part (2) comprises a connecting bar (21), the connecting bar (21) is arranged outside the main body part (1), one end of the connecting bar (21) is connected with the conductor of one phase, and the other end of the connecting bar is connected with the conductor of the other phase.

2. The circuit breaker with an inter-pole connection structure according to claim 1, wherein the main body portion (1) further comprises an insulating member (12) provided to a lower rear surface (111) of the circuit breaker body (11).

3. The circuit breaker with the interpolar connection structure according to claim 1, wherein the interpolar connection further includes an insulating cover (22) fixedly mounted with the circuit breaker body (11) and forming an accommodating space with a lower back surface (111) of the circuit breaker body (11).

4. The circuit breaker with an inter-pole connection structure according to any one of claims 1 to 3, wherein the linkage bar (21) is provided to a lower rear surface (111) of the circuit breaker body (11).

5. The circuit breaker with an interpolar connection according to claim 4, characterized in that the coupling bar (21) is arranged below the insulator (12), achieving a complete isolation of the coupling bar (21) from the circuit breaker body (11).

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