How to distinguish between high-voltage switchgear and ring main unit?

are divided into high voltage and low voltage. High voltage includes ring network cabinet, central cabinet, GG1A, etc. There are many types of ring network cabinets. The so-called "ring network cabinet" means that each distribution branch has (outlet switch cabinet), and the busbar of this switch cabinet is also part of the ring trunk line. That is to say, the ring trunk line is composed of the busbars of each outlet cabinet connected. Each outlet cabinet is called a "ring main unit". In fact, you cannot see the meaning of "ring network" when you take out a ring network cabinet alone. These ring network cabinets are not large, so the high-voltage switch of the ring network cabinet generally does not use a circuit breaker with a complex structure but a simple-structured high-voltage load switch with a high-voltage fuse. In other words, the high-voltage switch in the ring main unit is generally a load switch. The ring main unit uses a load switch to operate normal current and a fuse to cut off short-circuit current. The two are combined to replace the circuit breaker. Of course, this can only be limited to a certain capacity. Such switch cabinets can also be used in power distribution systems with non-ring network structures. Therefore, with the widespread application of this kind of switch cabinet, "ring network cabinets" have jumped out of the category of ring network power distribution and are generally referred to as load switches. The high-voltage switch cabinet is the main switch.
1. Different references
1. Ring network cabinet: It is a group of electrical transmission and distribution equipment (high-voltage switchgear) installed in a metal or non-metal insulated cabinet or made into an assembled and spaced ring network power supply unit.
2. High-voltage switchgear: Equipment used for switching, control, or protection in power generation, transmission, distribution, power conversion, and consumption of power systems.
2. Different characteristics
1. Ring network cabinet: The core part uses load switches and fuses, which have the advantages of simple structure, small size, low price, improved power supply parameters and performance, and power supply safety.
2. High-voltage switch cabinet: It has the functions of overhead incoming and outgoing lines, cable incoming and outgoing lines, and busbar communication.
3. Different uses
1. Ring main unit: It is widely used in power distribution stations and box-type substations in load centers such as urban residential areas, high-rise buildings, large public buildings, factories, and enterprises.
2. High-voltage switchgear: It should be suitable for various places such as power plants, substations, petrochemical industry, metallurgical steel rolling, light industry and textile, factories and mines, residential areas, high-rise buildings, etc.