China launched a new power transformer building can also build substations

With the increasing saturation of construction land resources in big cities, the research on "indoor, miniaturization and oil-free" of substations is of great significance to realize the coordinated development of substation construction and economic, social and ecological environment. A few days ago, Shenzhen Aodian High Voltage Electric Co., Ltd. released an innovative product-220kV evaporative cooling power transformer. As the key to promote the landing of the "embedded attached substation" project, the new power transformer will realize the construction of substations in high-density urban centers.

Introduction of grounding wire of cable branch box

The inner conductor connector of the cable branch box adopts crimping method, which is convenient to install and flexible in and out of the line. There can be up to 6~8 branch in and out of the line in use, which can realize multi-channel power transmission in the residential area and provide technical guarantee for going deep into the load center, shortening the power supply radius and reducing the line loss. At the same time, the cable branch box can be equipped with power indicator, fault indicator, silicone rubber fully insulated insert lightning arrester, mechanical program control lock, grounding switch, etc., to ensure the safety of operation, maintenance and management. With the cable network ring-type power supply, SF6 and other ring-type load switches can be configured to meet the requirements of local power outage maintenance without affecting the operation of the main network, realize regional power outage maintenance and narrow the power outage scope. At the same time, the ring network type cable branch box can realize the ring network power supply, which lays the foundation for the future 10kV line network structure adjustment.

High-voltage cabinet cabinet has common problems and treatment?

Problem 1: cabinet leakage high-pressure cabinet is often used in outdoor environment, exposed to wind and rain. Exposed to a humid environment for a long time, the cabinet may leak. There are many reasons for cabinet leakage, such as poor sealing of cabinet door, aging sealant, corrosion of cabinet surface, etc.

Box-type substation function and significance?

Box-type substation is a kind of substation that concentrates power equipment in a box and is built in the form of a power station. It is often used in cities or industrial parks and plays a very important role. This paper will discuss the role and significance of box-type substation.

What are the factors that affect the service life of high and low voltage sets?

The use environment is one of the important factors affecting the service life of high and low voltage sets. Under harsh environmental conditions, such as high temperature, low temperature, humidity, corrosive gas or liquid, the operating state of the equipment is easily affected, thereby shortening the service life. In addition, particles, dust, moisture, etc. in the environment will also enter the inside of the device, resulting in poor heat dissipation and reduced insulation performance of the device, thereby affecting the life of the device.

Discussion on Insulation Coordination Principle and Verification of Low Voltage Switchgear

Abstract: Insulation coordination is an important issue related to the safety of electrical equipment products, which has always been paid attention to by all aspects. Insulation coordination was first used in high-voltage electrical products. In China's electrical products, accidents caused by insulation systems account for 50%-60%, and due to the formal introduction of the concept of insulation coordination in low-voltage switchgear and control equipment, it is only a matter of the past two years. Therefore, the correct handling and solving the problem of insulation coordination in products is a more important issue and should be given sufficient attention.

Application of Passive Wireless Temperature Measuring Device in Transformer

Temperature is one of the key parameters of transformer operation, real-time monitoring of transformer temperature can effectively prevent accidents and ensure the safe and stable operation of transformer equipment. Researchers Zhu Jianhua, Liang Dong, Li Fang, Zhai Haiwen and Feng Linna, from Xi'an West Variable Components Co., Ltd., wrote an article in the first issue of Electrical Technology magazine in 2020, proposing a passive wireless temperature measurement device.