Switching device

Abstract

The invention discloses a switching device, and the switching device comprises a first power supply switching device; the first power supply switching device comprises an insulating shell, a power supply wire inlet end, a power supply wire outlet end, at least one moving contact and at least two static contacts, wherein the power supply wire inlet end at least comprises a first power supply wire inlet end and a second power supply wire inlet end. The power supply wire outlet end at least comprises a first power supply wire outlet end, and the first power supply wire inlet end and the second power supply wire inlet end are sequentially and longitudinally arranged in the height direction of the switching device. According to the invention, the power switching devices are optimally arranged, so that the minimum width direction can be realized under the condition that the height is as small as possible.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to a switch device. Background technique [0002] In my country's current low-voltage power distribution three-phase four-wire power grid, single-phase loads account for the majority. These single-phase loads have large irregularities due to actual application conditions and time distribution, resulting in serious three-phase current imbalances in the power grid. The problem is that it is easy to cause single-phase current or the center line is too large to cause overload or short circuit of the line, and even cause the cable to catch fire at high temperature and cause a fire accident, which is not conducive to the safety of power supply. [0003] As a typical application to solve the three-phase unbalance problem, the switchgear device has been used more and more. The existing switchgear with three-phase incoming line and one-phase outgoing line mostly uses three ele...

AI Technical Summary

Problems solved by technology

[0002]In my country's current low-voltage power distribution three-phase four-wire power grid, single-phase loads account for the majority, and these single-phase loads have large differences due to actual application conditions and time distribution Irregularity causes serious unbalanced three-phase current in the power grid, which can easily cause single-phase current or excessive center line, resulting in overload or short circuit of the line, and even lead to fire accidents caused by high temperature cables, which is not conducive to power supply safety

[0003] As a typical application to solve the three-phase unbalance problem, the switchgear device has been used more and more. The existing three-phase incoming line and one-phase outgoing line The switch device mostly uses three electromagnetic mechanisms to drive three sets of moving and static contacts, such as patent 201610916682.X, such as Figure 1 shows that the switch disclosed in this patent uses three electromagnetic mechanisms and three sets of moving and static contacts, which have the problems of high cost and large volume; such as patent 201821456019.7, such as Figure 2, its mechanism and contact system are arranged along the height direction , the dimension in the height direction is relatively large. When a three-phase nine-incoming system is required, the products of the above two patents need to install three independent products side by side along the width direction, which will occupy a large width dimension. Therefore, the above two patents The product can only be installed in the switchgear at the main power supply. If the switchgear is installed in the switchgear, because the switchgear belongs to the upper-level power distribution, the current is generally large, and the current level of the switchgear must be increased. As we all know, the higher the current level Larger, the greater the arc when switching and breaking, it will bring risks such as short circuit and fire to the switchgear; if the current level of the switchgear is not increased, after multiple switchgears are connected in parallel, the space of the switchgear will be larger, and the power distribution efficiency will be reduced. Not high, more switch cabinets need to be installed, which increases the cost of power distribution

[0004] As can be seen above, the market urgently needs switchgear installed in the meter box with a current below 250A. Therefore, the width of the switchgear is required to be as small as possible. The products of the above two patents cannot meet the size requirements of the height and width of the meter box.

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