CN221766662U - Leakage protection unit and electrical device - Google Patents

Abstract

The present disclosure proposes a leakage protection unit including: a first housing having a first free end and a mating end opposite the free end in a first direction, the first housing being formed of a first half and a second half; the second shell comprises a box-shaped main body, the main body comprises a first clamping part and a second clamping part opposite to the first clamping part in a second direction, the first clamping part and the second clamping part respectively lean against the first half part and the second half part at the matching end of the first shell, and the first half part and the second half part lean against each other towards each other and are clamped between the first clamping part and the second clamping part. The first shell and the second shell are configured to form an L-shaped structure, the second shell is provided with a through hole penetrating along a first direction, a leakage tripping device is arranged in the first shell, the second shell is provided with a zero sequence transformer, the zero sequence transformer can detect leakage, and the leakage tripping device performs tripping actuation according to the detected leakage.

Description

Leakage protection unit and electrical device

Technical Field

The present disclosure relates to the electrical field, and in particular, to a leakage protection unit and an electrical apparatus including the same.

Background

The existing leakage circuit breaker using the zero sequence current transformer comprises a circuit breaker and a leakage detection tripping accessory, wherein the circular zero sequence current transformer is arranged in the leakage detection tripping accessory, so that the volume of the leakage detection tripping accessory is larger, and particularly, the leakage circuit breaker is in the width direction.

Most of current leakage circuit breakers use circular zero sequence current transformers to detect electric leakage, and particularly for miniature circuit breakers, as the miniature circuit breakers are limited by geometric space and are connected with external cables, a group of output wire frames are needed to be additionally arranged on an electric leakage detection tripping accessory, the circular zero sequence current transformers are arranged between the output ends of the original circuit breakers and the output ends of the electric leakage detection tripping accessory, and a group of hard copper enameled wire groups formed according to requirements are used for penetrating through the circular zero sequence current transformers to connect the output ends of the circuit breakers and the output wire frames of the electric leakage detection tripping accessory. The output connection frame of each cable occupies a space of 1 pole module 18mm, and the installation space of the leakage circuit breaker is greatly enlarged. Not only occupies a large space, but also increases a lot of material cost, and the assembly process is complicated.

Through setting up zero sequence circuit transformer outside leakage tripping device for customer's wiring is direct through zero sequence transformer and the input or the output of circuit breaker, can reduce the width of electric leakage circuit breaker greatly, simplify the assembly. It is therefore desirable to provide a leakage protection unit that enables the customer wiring to pass directly through the zero sequence transformer and the input or output of the circuit breaker and that is structurally simple and stable.

Disclosure of utility model

The present disclosure proposes a leakage protection unit including: a first housing having a first free end and a mating end opposite the free end in a first direction, the first housing being made up of a first half and a second half that are open toward each other in a second direction and assembled in alignment with each other, the second direction being perpendicular to the first direction; the second casing, including the box-shaped main part, the main part has the centre gripping end and with the second free end that the centre gripping is held in opposite to the centre gripping end, the centre gripping end is in the second direction include first clamping part and with the second clamping part that the first clamping part is relative, first clamping part with the second clamping part is in the mating end of first casing is respectively support first half and second half, makes first half with second half is towards each other support and is pressed from both sides between first clamping part and the second clamping part.

The first housing and the second housing are configured to form an L-shaped structure, and the second housing has a through hole penetrating along the first direction. The first shell is provided with an electric leakage tripping device, the second shell is provided with a zero sequence transformer, the zero sequence transformer can detect electric leakage, and the electric leakage tripping device performs tripping actuation according to the detected electric leakage.

According to some embodiments of the disclosure, the first housing includes a guide portion extending in a third direction, the guide portion guiding the first housing and the second housing to slide relative to each other in the third direction to achieve the fitting, the third direction being perpendicular to the first direction and the second direction.

According to some embodiments of the disclosure, the second housing includes a stop wall extending in the second direction, the stop wall abutting a portion of the first housing in a third direction to block relative sliding of the second housing relative to the first housing in a first relative movement direction in the third direction.

According to some embodiments of the disclosure, the second housing further comprises a stop extending between the gripping end and the second free end, the stop having a first projection projecting perpendicular to a third direction, the first housing having a first stop against which the first projection abuts in the third direction to block relative sliding of the second housing relative to the first housing in a second relative direction of movement in the third direction opposite the first relative direction of movement.

According to some embodiments of the present disclosure, the stopper includes an arm extending in a first direction in a direction from the first free end toward the mating end at an end adjacent to the second free end, and a second protrusion protruding from the arm perpendicular to the first direction, the second free end including a second blocking portion abutting against the second blocking portion in the first direction to block the stopper from being detached from the main body in the first direction.

According to some embodiments of the disclosure, the second stops of the first and second free ends abut the first projection and the arm, respectively, to sandwich the stopper.

According to some embodiments of the disclosure, the second housing further includes an insertion portion protruding from the main body of the second housing in a direction from the mating end toward the first free end in a first direction, and a third protruding portion protruding from the insertion portion perpendicular to the first direction is provided on the insertion portion.

According to some embodiments of the disclosure, the through holes include a same plurality of sub-through holes arranged along the second direction, each two adjacent sub-through holes being in intersecting communication with each other.

According to some embodiments of the present disclosure, the second housing is further provided with metal tabs in one-to-one correspondence with the plurality of sub-through holes, each of the metal tabs protruding at least partially from an edge of the sub-through hole on the main body toward a center of the sub-through hole in a plane perpendicular to the first direction.

The disclosure also proposes an electrical device comprising any one of the above-mentioned earth leakage protection units and a circuit breaker, wherein the circuit breaker is arranged adjacent to the first housing and the second housing, the circuit breaker is aligned with the first free end and the second free end of the L-shaped earth leakage protection unit, and the earth leakage tripping device causes the circuit breaker to perform a tripping operation according to the detected earth leakage.

According to some embodiments of the present disclosure, the input or output terminal of each pole of the circuit breaker is aligned with the through hole such that the input or output terminal can be wired through the through hole.

According to some embodiments of the present disclosure, the number of poles of the circuit breaker may be 2, 3, or 4.

Drawings

Fig. 1 shows a schematic perspective view of a leakage protection unit according to an embodiment of the present disclosure, wherein a stopper is omitted, and a first housing and a second housing are not assembled;

Fig. 2 shows a schematic perspective view of the earth leakage protection unit according to fig. 1, wherein the stopper is omitted, and the first housing and the second housing are in an assembled state;

Fig. 3 shows a schematic perspective view of a portion of a first half of a first housing according to the present disclosure;

fig. 4 shows a schematic perspective view of a second half of a first housing according to the present disclosure;

Fig. 5 shows a perspective view of a body of a second housing according to the present disclosure;

fig. 6 shows a schematic perspective view of a stopper of a second housing according to the present disclosure;

Fig. 7 shows a cross-sectional schematic perspective view of the earth leakage protection unit according to the present disclosure, taken along a plane perpendicular to the third direction;

Fig. 8 shows a schematic diagram of an electrical device including a leakage protection unit according to the present disclosure, wherein the leakage protection unit has 4 sub-vias;

Fig. 9 shows a schematic diagram of an electrical device including a leakage protection unit according to the present disclosure, wherein the leakage protection unit has 3 sub-vias;

fig. 10 shows a schematic diagram of an electrical device including a leakage protection unit according to the present disclosure, wherein the leakage protection unit has 2 sub-vias.

Reference numerals

1 First shell, 11 first half, 12 second half, 13 first free end, 14 mating end, 15 guide, 16 first stop

A second housing, 21 body, 22 second free end, 221 second stop, 23 clamping end, 231 first clamping portion, 232 second clamping portion, 24 stop wall, 25 stops, 251 first projections, 252 second projections, 253 arms, 26 inserts, 261 third projections, 27 through holes, 271 sub through holes, 28 metal tabs,

A 3-phase circuit breaker is provided with a circuit breaker,

D1 first direction, D2 second direction, D3 third direction

Detailed Description

In order to make the objects, aspects and advantages of the technical solutions of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present disclosure. Unless otherwise indicated, terms used herein have the meaning common in the art. Like reference numerals in the drawings denote like parts.

In the description of the present disclosure, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or optically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art in the specific context.

For convenience of explanation, the first direction D1, the second direction D2, and the third direction D3 are designated in the present disclosure as indicated by black solid arrows in fig. 1 and 2. The first direction D1 is specified as: the first housing 1 has a first free end 13 and a mating end 14 at both ends in the first direction D1. The second direction D2 is designated as: the two ends of the second housing 2 in the second direction D2 are a second free end 22 and a clamping end 23, respectively, and the second direction D2 is perpendicular to the first direction D1. The third direction D3 is specified as: while being perpendicular to the first direction D1 and the second direction D2. The second casing 2 is relatively slidable with respect to the first casing 1 in a direction indicated by a black outline arrow as shown in fig. 1, whereby the indicated direction is designated as a first relative movement direction along the third direction D3, and a direction opposite to the first relative movement direction along the third direction D3 is designated as a second relative movement direction.

Fig. 1 and 2 show perspective views of an earth leakage protection unit according to an embodiment of the present disclosure, in which a stopper is omitted, the first housing 1 and the second housing 2 are not assembled in fig. 1, and the first housing 1 and the second housing 2 are assembled in fig. 2. As shown in fig. 1, the second housing 2 is slidable with respect to the first housing 1 in a direction indicated by a black hollow arrow, and further, the first housing 1 and the second housing 2 may be configured to form an L-shaped structure, as shown in fig. 2, which will be described in detail below. The first housing 1 has a first free end 13 and a mating end 14 in a first direction D1, the second housing 2 has a clamping end 23 and a second free end 22 in a second direction D2, and the mating end 14 is configured to mate with the clamping end 23 to form a corner connection of the L-shaped structure, where the first free end 13 and the second free end 22 respectively correspond to two ends of the L-shaped structure.

The first case 1 according to the present disclosure may include a first half 11 and a second half 12, wherein the first half 11 and the second half 12 are open toward each other in the second direction D2 and assembled in alignment with each other to constitute the first case 1. Fig. 3 shows a schematic perspective view of a portion of the first half 11 of the first housing 1 according to the present disclosure; fig. 4 shows a schematic perspective view of the second half 12 of the first housing 1 according to the present disclosure. Referring to fig. 3 and 4, the first housing may include a guide portion 15 extending in the third direction D3, and the guide portion 15 may be provided on the first half 11, may be provided on the second half 12, or may be provided with guide portions on both the first half 11 and the second half 12, as shown in fig. 3, for example. The guide 15 may be a groove extending in the third direction D3 as shown in fig. 3, and may be a rib or the like as alternative structures as will occur to those of skill in the art. The guide portion 15 may guide the first housing 1 and the second housing 2 to slide relatively in the third direction D3 to achieve the fitting, and such guiding of the relative sliding may be achieved by the guide portion 15 accommodating the first clamping portion 231 (shown in fig. 5) of the clamping end 23 of the second housing 2.

Fig. 5 shows a perspective view of the main body 21 of the second housing 2 according to the present disclosure, wherein the clamping end 23 of the second housing 2 comprises a first clamping portion 231 and a second clamping portion 232 opposite to the first clamping portion 231 in the second direction D2. The first clamping portion 231 and the second clamping portion 232 abut against the first half 11 and the second half 12 at the mating end 14 of the first housing 1, respectively, such that the first half 11 and the second half 12 abut against each other towards each other and are clamped between the first clamping portion 231 and the second clamping portion 232. Thereby, it is advantageous to maintain the assembly of the first half 11 and the second half 12 and to allow the first casing 1 and the second casing 2 to be assembled and internally communicated with respect to each other.

As shown in fig. 5, the body 21 further comprises a stop wall 24 extending in the second direction, which stop wall 24 may in particular be perpendicular to the third direction. Referring to fig. 2 and 5, the stopper wall abuts against a portion of the first housing 1 in the third direction D3 at 24 to block the relative sliding of the second housing 2 with respect to the first housing 1 in the first relative movement direction in the third direction D3.

In order to limit the relative sliding of the second housing 2 with respect to the first housing 1 in a second relative movement direction, opposite to the first relative movement direction, in the third direction D3, the earth leakage protection unit according to the present disclosure, for example, the second housing 2 may further comprise a stop 25, as shown in fig. 6. The stopper 25 may have a first protrusion 251 protruding perpendicular to the third direction D3, and the first protrusion 251 may protrude in the first direction D1, the second direction D2 (shown in connection with fig. 6 and 7), or other directions perpendicular to the third direction. Meanwhile, the first housing 1 may be provided thereon with a first blocking portion 16 abutting against the first protrusion 251 in the third direction D3, and the first blocking portion 16 may be, for example, one edge of a concave portion in which the first blocking portion 16 as an edge can block the first protrusion 251 when the first protrusion 251 is accommodated as shown in fig. 1 and 4. In particular, the abutting engagement of the first projection 251 with the first blocking portion 16 may block relative sliding of the second housing 2 with respect to the first housing 1 in a second relative movement direction opposite to the first relative movement direction in the third direction D3.

In order to fix the stop 25 relative to the first housing 1 and the body 21, the stop 25 may be fitted to extend between the clamping end 23 and the second free end 22. Specifically, as shown in connection with fig. 6 and 7, the stopper 25 includes an arm 253 extending in the first direction D1 in a direction from the first free end 13 toward the mating end 14 at an end adjacent to the second free end 22, and the second blocking portions 221 of the first housing 1 and the second free end 22 (described below) abut against the first protruding portion 251 and the arm 253, respectively, to sandwich the stopper 25.

Further, as shown in fig. 6 and 7, the stopper 25 further includes a second protrusion 252 protruding from the arm 253 perpendicular to the first direction D1, the second protrusion 253 may protrude in the second direction D2 (shown in fig. 6 and 7), the third direction D3, or other directions perpendicular to the first direction D1, and the number of the second protrusions 253 may be more than one, and the respective protruding directions may be different. The second free end 22 may further include a second blocking portion 221, as shown in connection with fig. 5 and 7, against which the second protrusion 252 abuts in the first direction D1 to block the stopper 25 from being disengaged from the body 21 in the first direction D1.

Referring to fig. 2 and 5, the second housing 2 may further include an insertion portion 26 protruding from the main body 21 in the first direction D1 in a direction from the mating end 14 toward the first free end 13, the insertion portion 26 is provided with a third protruding portion 261 protruding from the insertion portion 26 perpendicular to the first direction D1, the third protruding portion 261 may protrude in the second direction D2 (shown in connection with fig. 2 and 5), the third direction D3, or other directions perpendicular to the first direction D1, and the number of the second protruding portions 253 may be more than one, and the respective protruding directions may be different. The insertion portion 26 may be used for positioning and assembling of the earth leakage protection unit according to the present disclosure with the assembly of the circuit breaker 3 (as shown in fig. 8 to 10, which will be described later), and the provision of the second protruding portion 253 may strengthen the engagement of the earth leakage protection unit with the circuit breaker 3 in the first direction D1 and may reduce a gap perpendicular to the first direction D1.

In order to achieve the direct passage of the customer wiring through a zero sequence transformer (not shown, described later) and the input or output of the circuit breaker, the second housing 2 of the earth leakage protection unit of the present disclosure is provided with a through hole 27 penetrating in the first direction D1. The through-holes may include the same plurality of sub-through-holes 271 aligned in the second direction D2, every two adjacent sub-through-holes 271 are in intersecting communication with each other, the intersecting communication means that the plurality of sub-through-holes 271 are in communication with each other to form the through-hole 27, and the adjacent sub-through-holes 271 have overlapping or overlapping portions in a plane perpendicular to the first direction, as shown in fig. 1 and 5. In particular, each sub-via 271 corresponds to each pole of the circuit breaker 3, the number of sub-vias 271 being equal to the number of poles of the circuit breaker 3, for example, fig. 8 shows a 4-pole circuit breaker and corresponding 4 sub-vias 271, fig. 9 shows a 3-pole circuit breaker and corresponding 3 sub-vias 271, and fig. 10 shows a 2-pole circuit breaker and corresponding 2 sub-vias 271.

Referring to fig. 2 and 7, the second housing 2 is further provided with metal tabs 28 in one-to-one correspondence with the plurality of sub-through holes 271, each metal tab 28 protruding at least partially from an edge of the sub-through hole 271 on the main body 21 toward the center of the sub-through hole 271 in a plane perpendicular to the first direction D1, i.e., the metal tab 28 protrudes inside the outer contour of the sub-through hole 271 as viewed in the first direction D1. Thus, when the conductive wire is wired through the sub-via 271 (described later), it is also electrically connected to the metal tab 28 at the same time, and the metal tab 28 is electrically connected to a structure inside the first case, such as a leakage tripping device, which will be described later.

According to the leakage protection unit of the present disclosure, a leakage trip device (not shown) is provided in the first housing 1, the second housing 2 is provided with a zero sequence transformer (not shown) provided around the through hole 27 in the second housing 2, whereby when the conductive wire is wired through the sub-through hole 271, the conductive wire naturally passes through the zero sequence transformer, thereby enabling detection of leakage. The electric leakage tripping device performs tripping actuation action according to the detected electric leakage. The electrical device is used for being assembled with the circuit breaker 3, and the tripping actuation action of the leakage tripping device can cause the circuit breaker 3 to be opened. In particular, as mentioned above, the circuit breakers 3 of different numbers of poles are fitted with the earth leakage protection units having the corresponding same number of sub-through holes 271.

Thus, the leakage protection unit of the L-shaped structure according to the present disclosure is simple in structure, easy to assemble, low in cost, and the first housing and the second housing have a certain connection strength, and are not easily decomposed from each other. And the customer wiring can be directly through a zero sequence transformer (not shown, described later) and the input or output of the circuit breaker through the through-holes.

According to the present disclosure, there is also proposed an electrical apparatus comprising the above-mentioned earth leakage protection unit and a circuit breaker 3 corresponding thereto, as shown in fig. 8-10. The circuit breaker 3 is arranged adjacent to the first housing 1 and the second housing 2, the circuit breaker 3 being aligned with the first free end 13 and the second free end 22 of the L-shaped earth leakage protection unit, as shown in fig. 8-10. The leakage trip device causes the circuit breaker 3 to perform a trip operation according to the detected leakage.

The input or output terminals (not shown) of each pole of the circuit breaker 3 are aligned with the through holes 27, in particular with the sub-through holes 271 one by one, so that the above-mentioned input or output terminals can be wired through the through holes 27.

It is to be understood that the above description is intended to be illustrative, and not restrictive. For example, the above-described embodiments (and/or aspects thereof) may be used in combination with each other. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the disclosure without departing from the scope thereof. The functions or capabilities of the various elements or modules described herein are for illustration only and are in no way limiting, but are merely exemplary embodiments. Many other embodiments and modifications within the spirit and scope of the claims will become apparent to those of skill in the art upon reading the foregoing description. The scope of the disclosure should, therefore, be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.

In the appended claims, the terms "including" and "in which" are used as the plain-english equivalents of the respective terms "comprising" and "wherein. Furthermore, in the following claims, the terms "first," "second," and "third," etc. are used merely as labels, and are not intended to impose numerical requirements on their objects.

Claims (12)

1. A leakage protection unit, characterized by comprising:

A first housing having a first free end and a mating end opposite the free end in a first direction, the first housing being formed of a first half and a second half that are open toward each other in a second direction and assembled in alignment with each other, the second direction being perpendicular to the first direction,

A second housing including a box-shaped main body having a clamping end in a second direction and a second free end opposite the clamping end, the clamping end including a first clamping portion and a second clamping portion opposite the first clamping portion in the second direction, the first and second clamping portions abutting the first and second halves, respectively, at mating ends of the first housing such that the first and second halves are abutted toward each other and sandwiched between the first and second clamping portions,

The first housing and the second housing are configured to form an L-shaped structure, the second housing has a through hole penetrating along the first direction,

The first shell is provided with an electric leakage tripping device, the second shell is provided with a zero sequence transformer, the zero sequence transformer can detect electric leakage, and the electric leakage tripping device performs tripping actuation according to the detected electric leakage.

2. The earth leakage protection unit of claim 1, wherein,

The first housing includes a guide portion extending in a third direction, the guide portion guiding the first housing and the second housing to slide relatively in the third direction to achieve assembly, the third direction being perpendicular to the first direction and the second direction.

3. The earth leakage protection unit of claim 2, wherein,

The second housing includes a stop wall extending in the second direction that abuts a portion of the first housing in a third direction to block relative sliding movement of the second housing relative to the first housing in a first direction of relative movement of the first housing in the third direction.

4. The earth leakage protection unit of claim 3, wherein,

The second housing further includes a stopper extending between the clamping end and the second free end, the stopper having a first projection projecting perpendicular to a third direction, the first housing having a first blocking portion abutting the first projection in the third direction to block relative sliding of the second housing relative to the first housing in a second relative movement direction opposite the first relative movement direction in the third direction.

5. The earth leakage protection unit of claim 4, wherein,

The stopper includes an arm extending in a direction from the first free end toward the mating end in a first direction at an end adjacent to the second free end, and a second protruding portion protruding from the arm perpendicularly to the first direction, the second free end including a second blocking portion abutting against the second blocking portion in the first direction to block the stopper from being detached from the main body in the first direction.

6. The earth leakage protection unit of claim 5, wherein,

The second blocking portions of the first housing and the second free end abut the first protruding portion and the arm, respectively, to sandwich the stopper.

7. The earth leakage protection unit of claim 1, wherein,

The second housing further includes an insertion portion protruding from the main body of the second housing in a direction from the mating end toward the first free end in a first direction, and a third protruding portion protruding from the insertion portion perpendicular to the first direction is provided on the insertion portion.

8. The earth leakage protection unit of claim 1, wherein,

The through holes comprise a plurality of same sub through holes arranged along the second direction, and every two adjacent sub through holes are communicated with each other in an intersecting manner.

9. The earth leakage protection unit of claim 8, wherein,

The second housing is further provided with metal tabs in one-to-one correspondence with the plurality of sub-through holes, each of the metal tabs protruding at least partially from an edge of the sub-through hole on the main body toward a center of the sub-through hole in a plane perpendicular to the first direction.

10. An electrical device comprising a leakage protection unit according to any one of claims 1-9 and a circuit breaker,

The circuit breaker is arranged adjacent to the first shell and the second shell, the first free end and the second free end of the L-shaped leakage protection unit of the circuit breaker are aligned, and the leakage tripping device causes the circuit breaker to perform tripping operation according to detected leakage.

11. The electrical device of claim 10, wherein the electrical device comprises a plurality of conductors,

The input or output terminals of each pole of the circuit breaker are aligned with the through-holes such that the input or output terminals can be wired through the through-holes.

12. The electrical device of claim 11, wherein the electrical device comprises a plurality of conductors,

The number of poles of the circuit breaker may be 2, 3 or 4.