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CN-224217460-U - Combined switch with high-current protection function

CN224217460UCN 224217460 UCN224217460 UCN 224217460UCN-224217460-U

Abstract

The combined switch with the high-current protection function comprises at least a 2-pole frame type switch and at least a 1-pole fuse, wherein the at least a 2-pole frame type switch and the at least a 1-pole fuse are combined into a whole and are arranged in a direct-current power system to control the on-off of the direct-current power system. According to the combined switch, the frame type switch and the fuse are combined into a whole, the whole occupied space of the switch is reduced, the applicable scene of the switch is enlarged, meanwhile, the consumption of connecting copper bars is reduced between the frame type switch and the fuse, the product cost is saved, the fuse fusing indication can be integrated to a secondary terminal of the frame type switch, wiring is facilitated, wiring difficulty is reduced, on the other hand, the frame type switch and the fuse are combined into a whole, the current protection matching degree is improved, the protection of high-power overload of a direct-current power system is realized, the selection construction is not needed, the fuse can be detached from the front, and the maintenance difficulty is reduced.

Inventors

  • CAO LIN
  • WU WEIYU
  • LIU HAN

Assignees

  • 上海思源低压开关有限公司

Dates

Publication Date
20260508
Application Date
20250609

Claims (9)

  1. 1. The combined switch with the high-current protection function is characterized by comprising at least a 2-pole frame type switch (1) and at least a 1-pole fuse (2), wherein the at least 2-pole frame type switch (1) and the at least 1-pole fuse (2) are combined into a whole and are arranged in a direct-current power system to control the on-off of the direct-current power system, and when a large short-circuit current flows in the direct-current power system, the at least 1-pole fuse (2) can automatically disconnect a circuit to protect the whole direct-current power system; The at least 2-pole frame switch (1) does not comprise an arc chute.
  2. 2. A combination switch with high current protection as claimed in claim 1, wherein said at least 1 pole fuse (2) is integrally or integrally assembled with said at least 2 pole frame switch (1).
  3. 3. A combination switch with high current protection as claimed in claim 2, wherein said at least 1 pole fuse (2) is mounted on the left or right or both sides of said at least 2 pole frame switch (1).
  4. 4. A combination switch with high current protection function according to claim 3, wherein the at least 1 pole fuse (2) is assembled on the left side or the right side or both sides of the left and right sides of the whole at least 2 pole frame type switch (1) through screw connection or clamping structure.
  5. 5. A combination switch with high current protection as claimed in claim 3, wherein said at least 1 pole fuse (2) and said at least 2 pole frame switch (1) are integrally mounted on a splice tray (5).
  6. 6. A combination switch with high current protection as claimed in claim 1, characterized in that the at least 1-pole fuse (2) is provided with a fuse indicating device (2 a), the fuse indicating device (2 a) being connected to the secondary terminal of the at least 2-pole frame switch (1) by means of a wire.
  7. 7. A combination switch with high current protection as claimed in claim 1, wherein the connection lines of the at least 2-pole frame switch (1) and the corresponding connection lines of the at least 1-pole fuse (2) are connected so that the combination of the at least 2-pole frame switch (1) and the at least 1-pole fuse (2) forms a plurality of outlet modes.
  8. 8. A combination switch with high current protection as claimed in claim 1, characterized in that the at least 1-pole fuse (2) is mounted on the rear side of the at least 2-pole frame switch (1) above or below the corresponding terminal block of the at least 2-pole frame switch (1).
  9. 9. A combination switch with high current protection according to claim 1, characterized in that said at least 1-pole fuse (2) is mounted between said at least 2-pole frame switches (1).

Description

Combined switch with high-current protection function Technical Field The utility model belongs to the technical field of piezoelectric devices, and particularly relates to a combined switch with a high-current protection function. Background The term switch is interpreted as on and off. It refers to an element that can open a circuit, interrupt a current, or cause it to flow to other circuits. The most common switch is a human operated electromechanical device in which there is one or several contacts. The "closed" of the contact means that the contact is conductive and allows current to flow, and the "open" of the switch means that the contact is non-conductive and forms an open circuit and does not allow current to flow. The development history of the switch is developed from the original knife switch needing manual operation to the current intelligent switch applied to various large-scale electrical control equipment, the functions of the switch are more and more, and the safety is higher and higher. Along with the development of direct current power systems such as photovoltaic, energy storage, rail traffic, data centers and the like, the application of the switch in the direct current systems is becoming wider and wider. In order to improve the working voltage and breaking capacity of a switch in a direct current power system, in the prior art, a frame type switch and a fuse which are commonly used in an alternating current power system are commonly combined to control the switching function of the direct current power system. However, in this manner, the frame type switch and the fuse are combined to control the switching function of the dc power system, and although the operating voltage and breaking capacity of the switch in the dc power system can be improved, the following disadvantages exist: (1) The existing combination of the frame type switch and the fuse adopts a mode of a 4-pole frame type switch and a two-pole fuse, so that the occupied space is large, and the frame type switch and the fuse cannot be suitable for a scene in a narrow space; (2) The combined wiring of the existing frame type switch and the fuse is complex, more materials are required to be consumed, and the product cost is increased; (3) In the prior art, the frame type switch and the fuse are required to be purchased independently, so that the frame type switch and the fuse are required to be matched, the model selection difficulty is increased, and the installation and use cost is also increased. (4) The existing combination of the frame type switch and the fuse adopts a mode of a 4-pole frame type switch and a two-pole fuse, so that the maintenance is difficult to be carried out from the front, and the replacement and maintenance difficulties are increased; (5) In most of the existing frame-type switches and fuses, the frame-type switches do not need to consider the situation when a small fault current flows. Disclosure of utility model The utility model aims at overcoming the defects of the combined use of the frame type switch and the fuse in the prior direct current power system, and provides the combined switch with the high-current protection function, which combines the frame type switch and the fuse into a whole, thereby effectively solving the defects of the combined use of the frame type switch and the fuse in the prior art and ensuring the working voltage and breaking capacity of the switch in the direct current power system. Technical proposal In order to achieve the above purpose, the utility model provides a combined switch with a high-current protection function, which is characterized by comprising at least a 2-pole frame type switch and at least a 1-pole fuse, wherein the at least a 2-pole frame type switch and the at least a 1-pole fuse are combined into a whole and are arranged in a direct-current power system to control the on-off of the direct-current power system, and when a large short-circuit current flows in the direct-current power system, the at least a 1-pole fuse automatically breaks a circuit to protect the whole direct-current power system; The at least 2-pole frame switch (1) does not comprise an arc chute. In one embodiment, the at least 1 pole fuse is integrally or integrally assembled with the at least 2 pole frame switch. In one embodiment, the at least 1 pole fuse is mounted on either the left or right side or both sides of the at least 2 pole frame switch. In one embodiment, the at least 1 pole fuse is assembled on the left side or the right side or both sides of the left side and the right side of the whole at least 2 pole frame type switch through screw connection or clamping structures. In one embodiment, the at least 1 pole fuse and the at least 2 pole frame switch are integrally mounted on the splice tray. In one embodiment, the at least 1 pole fuse is provided with a fusing indicating device, and the fusing indicating device is connected to the secondary terminal of the at least