Selection of the location of the substation room
1. Close to the load center;
2. Convenient entry and exit lines;
3. Considering waterproofing, it should not be located directly below the toilet, bathroom, kitchen or other places where water often accumulates, nor should it be close to each other;
4. The distribution and substation attached to the civil building should be set up on the first floor or the underground floor, and should not be set up at the lowest floor.
5. The equipment is easy to hoist and transport.
Weak motor room location selection
1. It is advisable to classify and set up a weak motor room (wiring + telephone + data, consumer control + security + building control + broadcasting, radio + television);
2. There should be room for expansion in the area of the computer room;
3. Multi-storey buildings should be equipped with weak current rooms;
4. It should be located on the first floor and above, and when there are multiple underground floors, it can also be set up in a basement floor or a building in the center of the building complex;
5. The computer room should not be located directly below or adjacent to the toilet, bathroom or other humid and water-prone places;
The location of the weak current main engine room is selected
1. It should be close to the weak current room, and the entry and exit lines are convenient;
2. The equipment is convenient for hoisting and transportation;
3. The computer room should be kept away from the place of strong vibration source and strong noise source, and when it cannot be avoided, effective vibration isolation, noise reduction and sound insulation measures should be taken; (less than 68dB)
4. The computer room should be far away from the strong electromagnetic field interference place, and should not be set up in the upstairs, downstairs or next door of the transformer room and distribution room, and when it cannot be avoided, effective electromagnetic shielding measures should be taken (at the frequency of 0.15~1000MHz, it should not be greater than 126dB).
Position selection between strong and weak currents
1. It should be located in a public part that is convenient for inlet and outlet lines, easy to install and maintain;
2. When the integrated wiring system is installed, the wiring distance from the weak current room to the farthest information socket should not exceed 90m, and when it exceeds 90m, a weak current room should be added;
3. The position should correspond to the upper and lower layers. Each floor should have a separate door, and should not form a suite with other rooms;
4. The strong and weak current room should not share the pipeline well with water, heating, gas, etc.;
5. Avoid being close to flues, thermal pipes and other facilities with large heat dissipation or humidity.
The size and size of the computer room in the strong and weak current room
1. The office building is not less than 4 square meters;
2. The area between the equipment should be determined according to the following principles: 10m2 when the system is less than 1000 information points, and 5m2 when the system is larger, 5m2 for each additional 500 information points, but excluding the area required by other equipment.
3. A special distribution box should be set up in the equipment room, and the capacity should not be less than 5kVA, and the low-voltage distribution system should adopt TN-S or TN-C-S system. Copper core shielded cables should be used for low-voltage distribution lines under the overhead raised floor.
4. When there is a comprehensive wiring cabinet, the area of the weak current room should be ≥5m2. If the information points covered exceed 150 points, the area should be increased appropriately;
5. When there is no integrated wiring cabinet, the wall cabinet type weak current room can be used. When there are many systems, the area of the weak current room should be ≥ 3X0.8m2, and when the system is less, the area of the weak current room should be ≥ 1.58X0.6m2.
Arrangement of equipment in the strong and weak motor room
Equipment layout of substation computer room:
Note: The values in the table do not apply to the manufacturer's packaged products.
Annotation:
1. When the fixed switch cabinet is arranged against the wall, the clear distance between the back of the cabinet and the strong should be greater than 50mm, and the net distance between the side and the wall should be greater than 200mm;
2. The width of the passage can be reduced by 200mm when the wall of the building encounters the local protrusion of the column;
3. If there is an additional cabinet for inlet/outlet lines behind the switch cabinet, the width of the maintenance channel behind the cabinet should be calculated from its additional cabinet;
4. The values in parentheses are applicable to 35KV switchgear.
Equipment layout of the substation computer room
Equipment layout of the computer room of the consumer control center
1. The equipment of the computer room should be partitioned according to the system configuration and management needs, and when several systems share the computer room, the functions should be partitioned according to the function.
2. The equipment that needs to be monitored or operated frequently should be arranged to facilitate monitoring or operation.
3. The equipment that generates dust should be arranged in a centralized manner at the return air outlet close to the computer room.
4. The spacing and passage of the equipment shall comply with the following provisions:
(1) When the front of the cabinet is arranged opposite each other, its net distance should not be less than 1.5m;
(2) For the equipment that opens the door behind the back, the net distance between the back side and the wall should not be less than 0.8m;
(3) The distance between the side of the cabinet and the wall should not be less than 0.5m, the net distance between the side of the cabinet and other equipment should not be less than 0.8m, and the distance from the wall should not be less than 1.2m when maintenance and testing are required;
(4) When the total length of the equipment arranged side by side is greater than 4m, channels should be set on both sides.
(5) The net width of the channel should not be less than 1.2m.
5. The net width of the channel should not be less than 1.2m.
6. The height of the center of the wall-mounted equipment from the ground should be 1.5m, and the side distance from the wall should be greater than 0.5m.
7. The distance in front of the video wall of the video surveillance system and the cable TV system should meet the requirements of the viewing distance, and the distance between the video wall and the personnel on duty should be greater than 5 times the diagonal length of the main monitor screen. The equipment should be arranged to prevent reflection glare on the display.
8. The cables from the raised floor to each equipment should be laid in a closed metal trunking.
9. Equipment layout of TV room
10. Equipment layout of the machine room in the strong and weak current room:
(1) The weak current room and the distribution room should be set up separately, if it must be set up together due to conditions, the strong and weak current equipment and lines should be located on both sides of the distribution room, and the operation and maintenance distance of not less than 0.8m should be left in front of the strong and weak current box;
(2) The equipment box in the weak current room should be surface-mounted, and the installation height should be 1.2~1.5m from the ground in the center of the box.
scheme
1. Power distribution room of strong current shaft
2. Weak current shaft distribution room
Strong and weak motor room construction and environmental needs
1. The construction and environmental requirements of the computer room of the strong current room
(1) The grounding device of the computer room should be set up to meet the requirements of personal safety, equipment safety and normal operation of the system;
(2) A group of grounding devices should be shared for various grounding devices such as AC work grounding, safety protection grounding, DC work grounding, lightning protection grounding, etc., and the grounding resistance should be determined according to the minimum value;
(3) The grounding of each system should be grounded at a single point, and equipotential bonding measures should be taken;
(4) When each system shares a group of grounding devices, it is advisable to connect each system with grounding wires respectively;
(5) Lightning protection and grounding shall meet the relevant provisions in Chapters 11 and 12 of this code.
(6) The weak current room should be equipped with a grounding trunk and a grounding terminal.
2. The construction and environmental requirements of the weak current room
(1) Safety measures should be taken for the external doors and windows of the weak motor room located on the first floor.
(2) The wall of the weak current room shall be a non-combustible body with a fire resistance limit of not less than 1.0h, and the door shall be a Class C fire door.
(3) When there are many electrical equipment in the weak current room, it is advisable to set up an emergency power distribution panel and leave a backup circuit. When there are few electrical equipment, two 220V, 10A three-pin power sockets powered by emergency circuits can be set up;
(4) The lighting power supply should not be quoted from the switchboard of weak current equipment;
(5) The weak current room should be equipped with a grounding trunk and a grounding terminal.