24

2021-12

Various characteristics of outdoor distribution cabinets

The characteristics of outdoor distribution cabinets, also known as rainproof distribution cabinets, are that they incorporate waterproof functions in their design. These types of distribution cabinets are primarily used outdoors to protect against harsh weather conditions. Firstly, it goes without saying that rainproof distribution cabinets must have dustproof and waterproof capabilities, and they also need to be resistant to acids and alkalis. The protection level requirements are particularly high, needing to reach IP56.

2021-12-24

Various characteristics of outdoor distribution cabinets

16

2021-12

Classification of lighting distribution boxes and box structure

The lighting distribution box is divided into two types based on installation methods: closed hanging type (surface-mounted) and embedded type (flush-mounted). The main structure consists of components such as the box shell, panel, installation bracket, neutral busbar, and grounding busbar.

2021-12-16

Classification of lighting distribution boxes and box structure

10

2021-12

Key points of high-power DC power supply technology

In the 1960s, the emergence of high-power DC power supplies gradually replaced linear voltage regulators and SCR phase-controlled power supplies. Over the past 40 years, high-power DC power supply technology has undergone rapid development and changes, experiencing three stages of development: power semiconductor devices, high frequency and soft switching technology, and the integration technology of high-power DC power supply systems.

2021-12-10

Key points of high-power DC power supply technology

04

2021-12

Several situations that may occur when using a DC power supply.

1. In one scenario of a DC power supply, there is current but no operating voltage; in another scenario, there is operating voltage but no current. When either of these situations occurs, the operator should check whether the power supply load is good, whether there is a short circuit fault or disconnection, and whether the load meets the standards. Additionally, before operating the DC power supply, it is important to check if the power circuit is connected incorrectly. If connected incorrectly, the power supply may be damaged, affecting operational efficiency.

2021-12-04

Several situations that may occur when using a DC power supply.

02

2021-11

Analysis of issues related to lighting distribution boxes

When grounding the lighting distribution box, if it is not manufactured according to standards, and if some distribution boxes lack professional grounding or neutral busbars, the leakage protection action current time may be too long. The insulation resistance of the feeder and secondary circuit does not meet the requirements, and there is no grounding wire connection between the door and frame, or between the box body and grounding terminal, without any markings. Due to a lack of safety awareness, this can easily lead to tripping, short circuits, or even disasters such as fires. Additionally, some distribution boxes do not have backup circuits, which puts the safe use of lighting distribution boxes at unavoidable risk.

2021-11-02

Analysis of issues related to lighting distribution boxes

01

2021-11

Selection of electrical appliances for lighting distribution boxes and switch boxes

The selection of switches and electrical appliances in lighting distribution boxes and switch boxes should first ensure reliable power disconnection under normal and fault conditions. In the case of leakage, it should quickly disconnect the leaking device from the power source. There should be a clear power-off switch during maintenance. When selecting electrical appliances for lighting distribution boxes and switch boxes, the following principles should be noted.

2021-11-01

Selection of electrical appliances for lighting distribution boxes and switch boxes
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