Public case

25

2021-08

The overvoltage phenomenon in box-type substations.

In a box-type substation, if the voltage of the relay protection calibration instrument exceeds the maximum allowable operating voltage of the transformer during operation, it is referred to as transformer overvoltage.

2021-08-25

The overvoltage phenomenon in box-type substations.

24

2021-08

The main applications of box-type substations.

In the power system, most loads are inductive loads, which can cause a significant amount of reactive power. Simply put, electrical energy is wasted by the inductive loads in our daily lives. An important device in the box-type substation that can solve this problem is the capacitor compensation cabinet.

2021-08-24

The main applications of box-type substations.

23

2021-08

The application prospects of box-type substations.

Box-type substations are the main direction for current rural power grid renovation and future substation construction, but there are still some shortcomings in certain aspects, specifically:

2021-08-23

The application prospects of box-type substations.

19

2021-08

Installation and operation of box-type substations

The doors of the box-type substation should open outward and must be equipped with handles, concealed bolts, and locks, which should be rust-resistant. The transformer room should primarily rely on natural ventilation, and a curve showing the relationship between the internal temperature and the transformer output should be provided. The transformer room may be equipped with room temperature monitoring devices and automatic ventilation cooling devices as needed to ensure that the transformer operates at full load under specified environmental conditions. The transformer should be accessible from the top or side doors, and the noise level of the box-type substation must not exceed the specified noise level of the transformer. Regardless of whether the outer shell of the box is made of metal or non-metal materials, the metal frame of the box should be well grounded, have grounding terminals, and be marked with grounding symbols.

2021-08-19

Installation and operation of box-type substations

16

2021-08

Application of cable branching boxes

With the development of the economy and technological advancements, the use of cable-based power supply in urban networks has become an inevitable trend in the development of distribution networks. Ring network power supply, due to its economy and reliability, has become the preferred form for cable-based distribution networks. The development of urban distribution networks has led to an increasing proportion of ring network power supply in user power supply schemes. As the main equipment for ring network power supply, cable branch boxes are receiving more attention from power supply departments and users. The application of cable branch boxes is extensive, mainly used in distribution line switching stations, ring network rooms, distribution stations, distribution boxes, and pre-installed box-type substations, with a large quantity and variety.

2021-08-16

Application of cable branching boxes

12

2021-08

When selecting a cable branch box, you need to pay attention to these!

With the booming development of the real estate industry, the transformation of the State Grid is also changing rapidly, and the role of cable branch boxes is becoming increasingly significant. There are more and more manufacturers of cable branch boxes in the market, making it a headache for many businesses looking to purchase wired branch boxes to decide how to choose. Today, I will tell you what to pay attention to when purchasing cable branch boxes.

2021-08-12

When selecting a cable branch box, you need to pay attention to these!
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