Before installation, the environment in the control room should be qualified, all interior decoration construction has been completed, and the room is clean and safe.
A power distribution cabinet is installed and fixed:
(1) after the distribution cabinet is delivered to the site, organize unpacking inspection to check whether there is any deformation or paint loss, whether the instrument parts are complete, and whether the spare parts and instructions are complete.
Damage, and make a record of unpacking.
(2) according to the layout of the construction drawing, put the switchgear on the foundation steel in sequence. After the rows of cabinets are in place, first find the cabinets at both ends, and then two-thirds from the bottom to the top.
Stretch the string in the high position, and align one by one, taking the counter as the standard. Use 0.5mm gasket to adjust the alignment, and each gasket shall not exceed three pieces at most.
(3) after alignment in place, fix it according to the size of the cabinet fixing screw hole, and connect the cabinet with the cabinet and the cabinet with the side baffle with galvanized screws. High and Low Voltage Switchgear and Pre-installation
The angle steel shall be welded firmly, and the exposed part above the cable interlayer shall be covered with patterned steel plates, and the front and back of the cabinet shall be insulated with 1200mm×10mm (width× thickness).
Shop.
(4) switch cabinet, the horizontal deviation of the top of two adjacent cabinets is not more than 2mm, the horizontal deviation of the top of all cabinets is not more than 5mm, and the roughness of the edges of two adjacent cabinets is not more than 5mm.
1mm, the roughness of all cabinets is not more than 5mm, and the seam between cabinets is not more than 2 mm.
⑤ After the equipment is positioned, tighten and check the internal fasteners again, especially at the end of conductor connection. After the wiring in the cabinet is finished, use a vacuum cleaner to remove the impurities in the cabinet.
Keep the equipment clean inside and outside, and accurately identify the equipment location number and loop number.
After the installation of the distribution cabinet is completed, install the bridge above the cabinet. The opening position of incoming and outgoing cables of power distribution cabinet shall be reserved by the supplier according to the size. Cable laying shall be closed after completion.
The bridge and the grounding busbar in the cabinet are reliably grounded with special grounding wires. The joint between the bridge and the distribution box (cabinet) is connected with rubber plates to protect wires and cables. The bridge
See the figure for the connection with the power distribution cabinet.
B: secondary circuit wiring:
Before leaving the factory, the distribution cabinet should complete the wiring of the secondary circuit in the cabinet and the related detection tests. After the power distribution cabinet equipment arrives at the site, it shall be supervised by Party A’s on-site engineers and supervisors.
Organize acceptance in time under the guidance of the supervisor, complete relevant technical documents, good packaging and sealing of power distribution cabinets, complete components and reliable wiring. Installation of distribution cabinet
After fixing, the secondary wiring circuit of the distribution cabinet shall be tested for insulation one by one, and the test shall be conducted with a 500V insulation tester, and the test result shall be greater than 1MΩ.
All secondary loop control lines or cables are made of multi-stranded soft copper wires, and the terminals are made of terminals with appropriate specifications, which are crimped with special crimping pliers after tin stamping.
Neutral flux should be used when soldering tin.
C: handover test
For the handover test of power distribution cabinet, see the debugging and power transmission section later.
D: other requirements
(1) drawer switch cabinet installation also meet the following requirements:
A, the drawer push-pull flexible and light, no jam, collision phenomenon;
B, the center line of the moving contact and the static contact is consistent, and the contacts are in close contact;
C, drawer mechanical interlock or electrical interlock device action is correct and reliable, ensure that the circuit breaker break-brake, isolating contact can be separated;
D, the grounding contact between the drawer and the cabinet is in close contact; When the drawer is pushed in, the grounding contact of the drawer contacts before the main contact, and the procedure is reversed when it is pulled out.
(2) Before detecting the insulation of the secondary circuit of the power distribution cabinet, carefully check the design drawings, and remove the vulnerable components in the cabinet in advance.
(3) during the installation of the power distribution cabinet, the paint layer shall be complete, without damage, and the lighting in the cabinet shall be complete.
(4) substation indoor equipment shell should be well grounded. Before installation, the environment in the control room should meet the conditions, all interior decoration construction has been completed, and the room is clean and safe.
A power distribution cabinet is installed and fixed:
(1) after the distribution cabinet is delivered to the site, organize unpacking inspection to check whether there is any deformation or paint loss, whether the instrument parts are complete, and whether the spare parts and instructions are complete.
Damage, and make a record of unpacking.
(2) according to the layout of the construction drawing, put the switchgear on the foundation steel in sequence. After the rows of cabinets are in place, first find the cabinets at both ends, and then two-thirds from the bottom to the top.
Stretch the string in the high position, and align one by one, taking the counter as the standard. Use 0.5mm gasket to adjust the alignment, and each gasket shall not exceed three pieces at most.
(3) after alignment in place, fix it according to the size of the cabinet fixing screw hole, and connect the cabinet with the cabinet and the cabinet with the side baffle with galvanized screws. High and Low Voltage Switchgear and Pre-installation
The angle steel shall be welded firmly, and the exposed part above the cable interlayer shall be covered with patterned steel plates, and the front and back of the cabinet shall be insulated with 1200mm×10mm (width× thickness).
Shop.
(4) switch cabinet, the horizontal deviation of the top of two adjacent cabinets is not more than 2mm, the horizontal deviation of the top of all cabinets is not more than 5mm, and the roughness of the edges of two adjacent cabinets is not more than 5mm.
1mm, the roughness of all cabinets is not more than 5mm, and the seam between cabinets is not more than 2 mm.
⑤ After the equipment is positioned, tighten and check the internal fasteners again, especially at the end of conductor connection. After the wiring in the cabinet is finished, use a vacuum cleaner to remove the impurities in the cabinet.
Keep the equipment clean inside and outside, and accurately identify the equipment location number and loop number.
After the installation of the distribution cabinet is completed, install the bridge above the cabinet. The opening position of incoming and outgoing cables of power distribution cabinet shall be reserved by the supplier according to the size. Cable laying shall be closed after completion.
The bridge and the grounding busbar in the cabinet are reliably grounded with special grounding wires. The joint between the bridge and the distribution box (cabinet) is connected with rubber plates to protect wires and cables. The bridge
See the figure for the connection with the power distribution cabinet.
B: secondary circuit wiring:
Before leaving the factory, the distribution cabinet should complete the wiring of the secondary circuit in the cabinet and the related detection tests. After the power distribution cabinet equipment arrives at the site, it shall be supervised by Party A’s on-site engineers and supervisors.
Organize acceptance in time under the guidance of the supervisor, complete relevant technical documents, good packaging and sealing of power distribution cabinets, complete components and reliable wiring. Installation of distribution cabinet
After fixing, the secondary wiring circuit of the distribution cabinet shall be tested for insulation one by one, and the test shall be conducted with a 500V insulation tester, and the test result shall be greater than 1MΩ.
All secondary loop control lines or cables are made of multi-stranded soft copper wires, and the terminals are made of terminals with appropriate specifications, which are crimped with special crimping pliers after tin stamping.
Neutral flux should be used when soldering tin.
C: handover test
For the handover test of power distribution cabinet, see the debugging and power transmission section later.
D: other requirements
(1) drawer switch cabinet installation also meet the following requirements:
A, the drawer push-pull flexible and light, no jam, collision phenomenon;
B, the center line of the moving contact and the static contact is consistent, and the contacts are in close contact;
C, drawer mechanical interlock or electrical interlock device action is correct and reliable, ensure that the circuit breaker break-brake, isolating contact can be separated;
D, the grounding contact between the drawer and the cabinet is in close contact; When the drawer is pushed in, the grounding contact of the drawer contacts before the main contact, and the procedure is reversed when it is pulled out.
(2) Before detecting the insulation of the secondary circuit of the power distribution cabinet, carefully check the design drawings, and remove the vulnerable components in the cabinet in advance.
(3) during the installation of the power distribution cabinet, the paint layer shall be complete, without damage, and the lighting in the cabinet shall be complete.
(4) substation indoor equipment shell should be well grounded.