Houses, rooms and rooms are basically electrical buildings, but they express different rules of access.

1. Different names

Depending on the size of the transmission capacity, the room is physically occupied, ranging from small to large rows of rooms, rooms, stations and stations. The general area is referred to as a station, and the total terminal power is referred to as a station at the end of the room or room.

2. Different roles

A. Distribution rooms are indoor distribution sites with low-pressure loads, where power is distributed primarily to low-pressure users.

B. The electrical distribution room, simply the room where the electricity is distributed. It protects, measures and distributes electricity.

C. The distribution room is a sub-station for the distribution room (DP), which is generally larger and may include several units.

3. Different amounts of electricity

A. Facilities of 10 kV and below voltage level equipment are divided into high-voltage and low-voltage distribution rooms. The high-voltage distribution room generally refers to the 6kV-10kV high-voltage switch room; the low-voltage distribution room generally refers to the 400 V distribution room where the line is converted from the 10kV or 35kV station.

B. Power distribution rooms with a voltage level below 35KV.

Extension:

The State grid company divides it into four main categories according to the nature of the user ' s use of electricity: one for the population ' s use of electricity; two for business and industry in general; three for industrial use; and four for agricultural production. Some cities also classify non-resident electricity for lighting and separate agricultural drainage and drainage. There is also a more detailed division among the categories, which have different rates of electricity and, in some cases, preferential rates.

1. Electricity is used by the population for its livelihood and covers the following areas: household life lighting; electricity for ordinary household appliances, such as cooking, baking, heating, air conditioning, electrical and heat equipment, regardless of phase and capacity; and electricity for other non-operational appliances. At its core is the fact that this use of electricity is not profit-making in nature but solely for the needs of the population.

2. Non-residents ' access to electricity for lighting: organs, troops, hospitals, kindergartens, welfare homes, nursing homes, schools, street lights, etc.

3. Commercial electricity: Electricity for electricity users engaged in the exchange of goods, the provision of paid services, etc., including the sale of goods, goods for sale, warehousing, hotels, guest houses, hotels, hotels, cafés, teas, restaurants, beauty salons, bathrooms, leisure centres, general cultural and entertainment venues, repair, repair and repair services and other services, financial services, certificates, insurance, etc.

4. General industrial electricity range:

a. Electricity used for electrical power or for electromelting, baking, flammation, electrolytic, non-industrial production of electron, and experimental use, with a total capacity of 3 kW or more (including power used in infrastructure).

b. All industrial production of electric power, electromelting, baking, welding, electrolysis, electronization, electrical power, electric transformers with a capacity of less than 315 kVA or low voltage, and electrical power for production and repair operations to be performed externally within the above capacity and voltage.

c. Power discharge from cash crops (e.g., melon fruit, vegetables, etc.).

d. Power for the processing of agricultural by-products, the repair of agricultural machinery and tools, and for tea, fish ponds, etc.

5. Large industrial electricity price application range: all industrial production of electric power, electric smelting, baking, welding, electrolysis, electrochemicals, those with total voltage capacity above 315 kVA, and electricity that meets the above-mentioned capacity requirements for external production and repair.

6. Agricultural production ranges: agricultural ploughs, wells, pits, grains, fattening, food processing by social workers (non-commercial), animal feed processing, temporary lighting and black-ray infestation, etc., on farms or agricultural bases.

7. Agricultural drainage and drainage: electricity for drainage, irrigation, mountain areas, people in the highlands, animal drinking water.

Thus, the use of electricity at the same level is different in nature, with different categories and different rates of electricity. For example, the same 220V voltage is used for lighting, i.e. for electricity, which is used by the population, while the use of hairdressers is considered to be only commercial, which is 10 per cent higher. The distinction between electricity used by the population and that used by industry is based on differences in the nature of their use of electricity and not on differences in the use of voltage.

The majority of industrial electricity uses three-phase voltage, i.e. 380 VAC, 660 VAC, etc.