Interphase insulating sheath and miniature circuit breaker employing same

Abstract

The utility model relates to an interphase insulating sheath and a miniature circuit breaker employing the interphase insulating sheath, the interphase insulating sheath comprises side guard plates and a connecting plate, the two side guard plates are arranged at two sides of the connecting plate in parallel, the inner sides of the side guard plates form buckles protruding inwards, heat dissipation holes are formed in the connecting plate, and the interphase insulating sheath is connected with the miniature circuit breaker through the buckles. The buckles are arranged on the inner sides of the side protection plates, the outer sides of the side protection plates extend forwards, the buckles on the inner sides can be opened outwards by pressing the outer sides, the buckles can be conveniently connected with clamping grooves in the miniature circuit breaker, and heat dissipation is facilitated due to the heat dissipation structure.

Description

Technical Field

[0001] The utility model relates to an interphase insulating sheath and a small circuit breaker adopting the same. Background Art

[0002] Miniature DC circuit breakers are used in the miniature circuit breaker series for overload protection, short circuit protection and infrequent line conversion of DC lines. With China's continuous and rapid growth, many fields such as communication power supply, power system, DC power supply, rail transportation, shipbuilding and metallurgy are also developing rapidly, and their requirements for DC systems are also increasing.

[0003] Since small DC circuit breakers do not have a zero crossing point, multiple small circuit breakers need to be used in series when breaking high voltages. Small DC circuit breakers used in series have high requirements for phase-to-phase insulation, so a separate phase-to-phase insulation structure is needed to ensure insulation. The existing phase-to-phase insulation structure is usually a single-piece partition, which is inconvenient to install and unstable to assemble. Summary of the invention

[0004] In view of the above-mentioned deficiencies, the utility model provides an interphase insulating sheath which has a simple structure and is convenient and reliable to install, and a small circuit breaker using the same.

[0005] In order to achieve the above purpose, the utility model adopts an interphase insulating sheath, including side guard plates and a connecting plate, wherein the two side guard plates are arranged in parallel on both sides of the connecting plate, the inner side of the side guard plates forms an inwardly protruding buckle, and the connecting plate forms a heat dissipation hole.

[0006] The utility model is further configured such that the distance between the outer sides of the two side shields is 18 mm, and the size of the heat dissipation hole in the center of the connecting plate is adapted to the wiring hole of the small circuit breaker.

[0007] The utility model is further configured such that the distance between the outer sides of the two side guard plates is 36 mm, and the heat dissipation holes in the center of the connecting plate are a plurality of heat dissipation grooves.

[0008] The utility model includes a small circuit breaker, wherein both sides of the shell at both ends of the small circuit breaker are respectively provided with card slots, the small circuit breaker includes an interphase insulating sheath, the interphase insulating sheath includes a side guard plate and a connecting plate, two side guard plates are arranged in parallel on both sides of the connecting plate, the inner side of the side guard plate forms an inwardly protruding buckle, a heat dissipation hole is formed on the connecting plate, the distance between the outer sides of the two side guard plates is 18mm, the size of the heat dissipation hole in the center of the connecting plate is adapted to the wiring hole of the small circuit breaker, the interphase insulating sheath is connected to both ends of the small circuit breaker through the cooperation of the buckle and the card slot,

[0009] The utility model also includes a miniature circuit breaker, which is formed by splicing a plurality of shells, and each shell at both ends of the miniature circuit breaker is respectively provided with a card slot on both sides, the miniature circuit breaker includes a first interphase insulating sheath and a second interphase insulating sheath, the first interphase insulating sheath and the second interphase insulating sheath both include side guard plates and a connecting plate, the two side guard plates are arranged in parallel on both sides of the connecting plate, the inner sides of the side guard plates form inwardly protruding buckles, heat dissipation holes are formed on the connecting plate, the distance between the outer sides of the two side guard plates of the first interphase insulating sheath is 18mm, and the size of the heat dissipation hole in the center of the connecting plate is adapted to the wiring hole of the miniature circuit breaker, the first interphase insulating sheath is connected to one end of a single shell of the miniature circuit breaker by matching the buckle with the card slot, the distance between the outer sides of the two side guard plates of the second interphase insulating sheath is 36mm, and the heat dissipation hole in the center of the connecting plate is a plurality of heat dissipation grooves, and the second interphase insulating sheath is connected to one end of the two shells of the miniature circuit breaker by matching the buckle with the card slot.

[0010] The interphase insulating sheath of the utility model is connected to the small circuit breaker by a buckle. The buckle is arranged on the inner side of the side guard plate, and the outer side extends forward. The buckle on the inner side can be opened outward by pressing the outer side, so that the buckle is conveniently connected to the slot on the small circuit breaker, and the heat dissipation structure is convenient for heat dissipation. The interphase insulating sheaths of two widths, 1P (18mm) and 2P (36mm), are adopted, which can be conveniently combined and applied to different small circuit breakers. The interphase insulating sheath of 1P (18mm) can be used for wiring, which is convenient for wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of specific embodiment 1 of the utility model.

[0012] Figure 2 It is a schematic diagram of specific embodiment 2 of the utility model.

[0013] Figure 3 It is an explosion diagram of specific embodiment 3 of the utility model.

[0014] Figure 4 It is an explosion diagram of specific embodiment 4 of the utility model. DETAILED DESCRIPTION

[0015] like Figure 1 As shown, a specific embodiment 1 of the utility model is an interphase insulating sheath 1, comprising a side guard plate 11 and a connecting plate 12, wherein the two side guard plates 11 are connected in parallel on both sides of the connecting plate 12, the inner side of the side guard plate 11 forms an inwardly protruding buckle 13, the outer side of the side guard plate 11 extends forward, and a heat dissipation hole 14 is formed on the connecting plate 12, the distance between the outer sides of the two side guard plates 11 is 18 mm, and the size of the heat dissipation hole 14 in the center of the connecting plate 12 is adapted to the wiring hole of the small circuit breaker.

[0016] like Figure 2 As shown, the specific embodiment 2 of the utility model is an interphase insulating sheath 2, including a side guard plate 21 and a connecting plate 22, the distance between the outer sides of the two side guard plates 21 is 36 mm, the inner side of the side guard plate 21 forms an inwardly protruding buckle 23, and a plurality of heat dissipation grooves 24 are formed in the center of the connecting plate 22.

[0017] like Figure 3 As shown, a specific embodiment 3 of the utility model is a miniature circuit breaker 3, and a card slot 31 is respectively provided on both sides of the shell at both ends of the miniature circuit breaker 3, and a card member 32 is provided in the card slot 31. The inner side of the side guard plate 11 of the interphase insulating sheath 1 as described in the specific embodiment 1 extends into the card slot 31, and the interphase insulating sheath 1 is connected to the two ends of the miniature circuit breaker 3 through the cooperation of the buckle 13 and the card member 32, and the heat dissipation hole 14 in the interphase insulating sheath 1 is adapted to the wiring hole 33 of the miniature circuit breaker 3.

[0018] like Figure 4 As shown, a specific embodiment 4 of the utility model is a miniature circuit breaker 4, which is formed by splicing a plurality of shells. A card slot 41 is provided on both sides of each shell at both ends of the miniature circuit breaker 4, and a card member 42 is provided in the card slot 41. The interphase insulating sheath 1 described in the specific embodiment 1 is connected to one end of a single shell of the miniature circuit breaker 4 through the cooperation of the card buckle 13 and the card member 42. The interphase insulating sheath 2 described in the specific embodiment 2 is connected to one end of two shells of the miniature circuit breaker 4 through the cooperation of the card buckle 23 and the card member 42.

[0019] The preferred embodiments of the present invention in the above specific embodiments, and other obvious changes or combinations are also within the protection scope of the claims.

Claims

1. An interphase insulating sheath, comprising a side guard plate and a connecting plate, wherein the two side guard plates are arranged in parallel on both sides of the connecting plate, and characterized in that: A buckle protruding inward is formed on the inner side of the side guard plate, and a heat dissipation hole is formed on the connecting plate.

2. The interphase insulating sheath according to claim 1, characterized in that: The distance between the outer sides of the two side guard plates is 18 mm, and the size of the heat dissipation hole in the center of the connecting plate is adapted to the wiring hole of the small circuit breaker.

3. The interphase insulating sheath according to claim 1, characterized in that: The distance between the outer sides of the two side guard plates is 36 mm, and the heat dissipation holes in the center of the connecting plate are multiple heat dissipation grooves.

4. A miniature circuit breaker, characterized in that: The shells at both ends of the miniature circuit breaker are respectively provided with card slots on both sides, and the interphase insulating sheath as claimed in claim 2 is connected to the two ends of the miniature circuit breaker through the cooperation of the buckle and the card slot.

5. A miniature circuit breaker, which is composed of multiple shells, characterized in that: Card slots are respectively provided on both sides of each shell at both ends of the miniature circuit breaker. The miniature circuit breaker includes the interphase insulating sheath as described in claim 1, and the interphase insulating sheath includes a first interphase insulating sheath and a second interphase insulating sheath. The distance between the outer sides of the two side guard plates of the first interphase insulating sheath is 18 mm, and the size of the heat dissipation hole in the center of the connecting plate is adapted to the wiring hole of the miniature circuit breaker. The first interphase insulating sheath is connected to one end of a single shell of the miniature circuit breaker by the cooperation of the buckle and the card slot, the distance between the outer sides of the two side guard plates of the second interphase insulating sheath is 36 mm, and the heat dissipation hole in the center of the connecting plate is a plurality of heat dissipation slots, and the second interphase insulating sheath is connected to one end of the two shells of the miniature circuit breaker by the cooperation of the buckle and the card slot.

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