Inspection of box-type substations before use

Release time:

2021-08-30

Author:

Source:

Abstract

After the installation or maintenance of a box-type substation, certain inspections and tests should be conducted before it is put into operation. This includes checking whether the interior of the substation is clean, whether the operating mechanisms are flexible, whether the main electrical appliances are flexible and reliable, whether the auxiliary contacts of the electrical appliances are reliable and accurate, whether the instruments and relays operate accurately, whether the ratio of the modified electric meter to the transformer is correct, whether the wiring polarity is correct, whether all electrical installation nuts are tightened, whether the installation is firm and reliable, whether the bus connections are good, and whether the clamp parts are installed securely. Additionally, it should be verified that the supporting insulators and electrical setting values meet requirements, that the specifications of the fuse cores are correct, and that the contacts of both the main circuit and auxiliary circuit comply with the requirements of the electrical schematic. The internal protection grounding system of the product should be less than 0.01 ohms, and each part should undergo a withstand voltage test according to its corresponding voltage level.

　　Box-type substationAfter installation or maintenance, certain inspections and tests should be conducted before putting the substation into operation. Check if the interior of the substation is clean, if the operating mechanisms are flexible, if the main electrical appliances are flexible and reliable, if the auxiliary contacts of the electrical appliances are reliable and accurate, if the instruments and relays operate accurately, if the ratio of the modified electric meter to the transformer is correct, if the wiring polarity is correct, if all electrical installation nuts are tightened, if the installation is firm and reliable, if the bus connections are good, and if the clamp parts are installed reliably. The supporting insulators and electrical setting values should meet requirements, the specifications of fuse cores should be correct, and the contacts of the main circuit and auxiliary circuit should meet the requirements of the electrical schematic diagram. The internal protection grounding system of the product should be less than 0.01 ohms, and each part should undergo a withstand voltage test according to its corresponding voltage level.

All components in the box-type substation should be maintained according to their respective technical requirements. When using oil-immersed transformers, oil sample analysis tests should be conducted at least once a year as specified. For high-voltage switchgear in operation, after 20 load or 2000 no-load switching operations, check the condition of contacts and wear of arc extinguishing devices. If abnormalities are found, timely repairs or replacements should be made. After automatic tripping of low-voltage switchgear, check and analyze the cause of tripping; it can only be put into operation after eliminating failures. Lightning arresters should undergo a preventive test once a year before the arrival of the rainy season. When maintaining high-voltage switchgear or conducting overall maintenance, it is necessary to first cut off the incoming power supply to the substation.

Hunan Chengyuan Electric Co., Ltd. is a high-tech enterprise specializing in research and development, production, sales, and installation debugging services for complete sets of low and high voltage switchgear for power transmission and distribution, DC power supplies, outdoor box-type substations, and industrial automation control equipment. We warmly welcome you to visit our company for guidance and communication to create a better future together!

 

Key words:

Previous:

Quality assurance measures for box-type substations

Next:

Selection of internal components for box-type substations

Recommended Reading

Chengyuan Electric and Siemens join forces to create a better future!

On October 23, 2024, at 2:00 PM, Chengyuan Electric successfully held a project communication and technical sharing meeting with Siemens in the first-floor exhibition hall of the factory. The purpose of this meeting was to strengthen cooperation and communication between both parties, promote innovation, and jointly advance the development of the smart electrical field.

2024-10-29

How to choose suitable box-type substations and cable branch boxes

In the power system, box substations and cable branch boxes play a crucial role and are widely used in various settings, such as industrial parks, residential areas, and commercial buildings. However, faced with a variety of models and specifications available in the market, how can one choose the box substation and cable branch box that best meet their needs?

2023-12-25

The role of cable junction boxes in automated control systems.

The cable branching box is one of the indispensable components in an automation control system, playing an important role in the system by enabling the branching and connection of cables, ensuring the normal operation of the entire system. This article introduces the function of the cable branching box and its significance in automation control systems.

2023-12-15

%E7%AC%AC%E4%B8%80%EF%BC%8C%E6%9C%80%EF%BC%8C%E4%BC%98%E7%A7%80%EF%BC%8C%E5%A2%9E%E5%BC%BA%EF%BC%8C%E4%B8%80%E6%B5%81%EF%BC%8C%E5%8D%93%E8%B6%8A%EF%BC%8C%E9%A2%86%E5%85%88%EF%BC%8C%E5%85%88%E8%BF%9B%EF%BC%8C%E5%BC%95%E9%A2%86

Sorry，当前栏目暂无内容!

您可以查看其他栏目或返回 首页

Sorry，The current column has no content!

You can view other columns or return Home