High-voltage AC electrical box for DC charging pile

Abstract

The invention provides a high-voltage alternating-current electric box for a direct-current charging pile. The high-voltage alternating-current electric box comprises an independently-closed box body,wherein a main alternating-current circuit breaker, a main contactor, a lightning protection air switch device, a lightning protector, an alternating-current mutual inductor, an alternating-current detection device and a safety box are integrated in the box body, and an alternating-current electric meter is arranged in the box body; a quick connector is arranged on the outer wall of the box body;a wiring principle in the box body is that the wiring of an active power path conforms to a non-bending principle, the strong current and the weak current are separate in wiring, and the wiring of the weak current is wrapped by an independent shielding layer. According to the high-voltage alternating-current electric box for the direct-current charging pile, devices of an alternating-current input part are integrated in the independently-closed box body, and the quick connector is arranged on the outer wall of the box body, so that the overall replacement of the high-voltage alternating-current electric box is facilitated; and the separate wiring of the strong current and the weak current is achieved, the wiring of the weak current is wrapped by the independent shielding layer, the mutualinterference of the strong current to the weak current is weakened, and the signal stability and the system safety in the direct-current charging pile are improved.

Description

technical field [0001] The invention relates to the technical field of DC charging piles, in particular to a high-voltage AC electrical box of a DC charging pile. Background technique [0002] The main function of these components is to control the on-off of the power input path, and monitor the data information (voltage, current, phase angle, power, etc.) Current, lack of phase, severe phase angle deviation, etc.), safety control (lightning strike, short circuit, electric shock, breakdown, etc.), and in DC charging piles, the installation locations are often together. [0003] figure 1 As shown, the main components and functions of the AC input part are listed as follows: [0004] Main AC circuit breaker QF—the main switch of the input three-phase AC power supply (A, B, C represent three-phase power), with power-off protection function; [0005] AC transformer (AC voltage acquisition module)—used to collect the current value of three-phase input, a group of three; [00...

AI Technical Summary

Problems solved by technology

[0014] 1. The diameter of the power cable is large, and the high-current cable connection between several components of the AC input part often takes up a large space;

[0015] 2. The distance between the strong electric power cable and the weak electric signal cable is relatively close, and the weak electric signal is easily interfered by the strong electric signal;

[0016] 3. The terminal position of the weak current signal line is often covered by the strong current cable, which makes it difficult to maintain;

[0017] 4. The connection of strong electric cables usually requires the use of special tools such as wrenches and sockets, and may even have strict torque requirements

Time-consuming and labor-intensive installation, maintenance and replacement;

[0018] For example, when the total power of the AC input is large, electric sparks may be generated when the power path is switched on and off, causing hidden dangers in installation. When assembling and designing, separate insulation isolation and arc extinguishing mechanisms should be designed for preventive protection

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