Traditionally, the power system is divided into generation, transmission, Power distribution The power system consists of three subsystems. Electricity generated by the power generation system is transmitted via the transmission system and then distributed to end users through the distribution system. In general, within a power system, the portion that extends from a step-down distribution substation (high-voltage distribution substation) to the user side is referred to as the distribution system. The distribution system is an electrical network that comprises various distribution equipment (or components) and facilities, responsible for voltage transformation and direct power delivery to customers. Next, let’s take a look at the key electrical components that make up the entire distribution system!

　　 Power distribution System Configuration

　　Distribution systems can be classified into three voltage levels: high-voltage distribution systems, medium-voltage distribution systems, and low-voltage distribution systems. According to the “Guidelines for Urban Power Grid Planning and Design,” voltages above 220 kV are designated as transmission and transformation systems; 35 kV, 63 kV, and 110 kV constitute the high-voltage distribution system; 10 kV and 6 kV comprise the medium-voltage distribution system; and 380 V and 220 V

　　Distinction between low, medium, and high pressure

　　1) Distinguish based on the magnitude of the energy difference.

　　Unit charge is used to classify power based on the magnitude of the energy difference arising from the electric potential in an electrostatic field; the lower the value, the lower the voltage. Based on the magnitude of this energy difference, systems are categorized as high-voltage, medium-voltage, and low-voltage.

　　2) Classify according to bolt size.

　　High voltage is defined as a ground-to-conductor voltage of 1,000 volts or more, while low voltage is defined as a ground-to-conductor voltage of less than 1,000 volts. Safe voltage refers to a voltage level at which prolonged contact with the human body does not pose an electric shock hazard.

　　Distribution System Components and Corresponding Electrical Symbols

　　Medium-voltage (35 kV, 10 kV, 6 kV; low-voltage on the customer side: 690 V, 400 V; 400 V, 220 V) – a summary of commonly used electrical components in distribution systems and their functions.

　　Currently, both industrial and residential electricity consumption are placing increasingly stringent demands on power supply quality and electrical safety, which in turn raises the bar for distribution-room logistics operations. In other words, a shift from “reactive maintenance” to “proactive logistics” has become essential. Consequently, the more intelligent and specialized “e-Logistics” model has emerged, delivering “high-quality services” while upholding “lean logistics” principles to achieve “safety and efficiency.”

　　 Power distribution Analysis of the Current Status of In-Door Transportation

　　The annual cost of operating and maintaining distribution rooms is substantial, yet the safety of these facilities is far from “controllable, controllable, controllable.” Surveys reveal that more than 80% of facility managers are concerned about the safety of their distribution rooms, often thinking, “If we just spend the money, everything will be fine, right? That’s all I’m hoping for.” You may feel the same way. In reality, however, over 90% of distribution rooms harbor safety issues—large or small—that go unnoticed and unaddressed in a timely manner. These latent risks are like ticking time bombs lurking right beside users; the consequences of an accident could be truly catastrophic.

　　The reasons are as follows.

　　1) Inadequate safety management in the distribution room

　　The absence of posted regulations, incomplete safety warning signs, and the failure to install insulating rubber mats all fail to meet the standardized safety management requirements for distribution rooms.

　　2) Low level of automation in distribution room equipment

　　Currently, the high-voltage side of the distribution room is generally equipped with conventional protective devices, but it lacks automated real-time monitoring capabilities, making it impossible to promptly obtain the equipment’s current operating status.

　　3) The technical and professional skill level in the distribution room is relatively low.

　　All personnel assigned to the distribution room are general electricians with primary expertise in low-voltage electrical systems. They possess limited technical knowledge in the operation and maintenance of high- and low-voltage equipment in the distribution room and lack specialized analytical capabilities, making it difficult for them to accurately identify and promptly address potential safety hazards.

　　4) The transportation management model for the distribution room is relatively outdated.

　　Currently, the operation and maintenance of distribution rooms are primarily carried out by unmanned operation and maintenance units. However, the personnel on duty are often low in professional expertise, and no high-definition live-line testing equipment is deployed. As a result, equipment faults are typically detected only when circuit breakers trip or power outages occur, necessitating post-event analysis to pinpoint the root cause and formulate effective preventive measures. This time, such issues once again arose, creating a vicious cycle that has led to substantial losses in human resources, materials, and electricity supply.

　　The above is the entire Power distribution What electrical components are included in the system? For more information, please feel free to contact us at any time!