I. Equipment unpacking inspection
1、After the equipment and devices arrive at the site, they should be unpacked and inspected in time together with the supervisor and construction unit, and the technical documents of the manufacturer should be complete.
Documents should be complete, type specifications should meet the design requirements, accessories spare parts complete.
2, the cabinet body appearance should be no damage and deformation, paint integrity without damage. Cabinet (plate) internal electrical devices and components, insulation porcelain parts complete, no damage and cracks and other defects.
Second, the cabinet handling
Should be based on the weight of the cabinet and the size of the shape, combined with the site construction conditions, decided to use transport equipment; cabinet lifting, the cabinet body with lifting
When the ring, although the cable should be sent through the ring, no ring, the cable should be hung in the four corners of the main load-bearing structure, shall not be hung in the equipment from the cable connection
The product should be fixed firmly in the process of handling to prevent damage to the components, instruments and paint.
Three, the foundation steel production and installation
1、The power distribution cabinet needs to be installed on the basic steel section, the steel section can be determined according to the size of the distribution panel and steel specifications, general steel section
Can choose No. 10 channel or L50x5 angle steel production, the production of the first section of steel flattening straightening, and then prefabricated according to the requirements of the drawings processing good base
The base section steel, and rust removal.
2、Floor cabinet installation: available channel steel to do the cabinet base, and φ10-12U expansion bolts to fix the base, the base can also be in the Shijian
Construction when pre-buried in the concrete ten.
3, the installation of base steel, the application of level, leveling, leveling, base steel installation of the straightness and level.
Every 1m should be less than 1mm, the whole length should be less than 5mm; the position deviation and non-parallelism of the foundation steel in the whole length should be less than 5 mm.
3, steel buried and grounding wire Huang connected, outside Xia part should be brushed with camphor oil, and brush two times paint.
Fourth, the cabinet installation
1、Installation cabinet before, first according to the order specified in the drawings will cabinet good mark, then placed to the installation position.
2, cabinet installation alone, should find a good cabinet front and side verticality.
3, into a series of cabinet installation, can first adjust each cabinet to the general position, in place and then precisely adjust the first side of the cabinet, and then the first side of the cabinet surface as the standard by adjusting. Adjustment order can be either from left to right, can also be from right to left, can also be adjusted first
Good in the middle of a cabinet, and then left and right to adjust separately.
4、Cabinet to find the right, cabinet and steel between the use of 0.5mm iron piece for adjustment, but each shim can not exceed a maximum of 3 pieces. Leveling to find
Positive, should be consistent with the plate, neatly arranged, between the cabinet and cabinet and cabinet body and the side of the file plate are applied bolt tightening, the gap between the cabinet joints should be less than 2mm.
5, in its base steel on the installation of the cabinet, the best is to use bolted connection, fasteners should be galvanized products, and appropriate to use standard parts.
Should be based on the size of the fixed screw holes in the bottom of the cabinet, in the base section steel with hand electric drilling; can also use welding fixed cabinet, but the main control panel, relay
Electric protection plate and automatic device plate, etc. should not be welded with the base steel. Such as welding, each cabinet should not be less than four brilliant seams, each
Welded seam length of about 100mm.
6, the cabinet group after installation, the verticality of the disk surface per m high should be less than 1.5mm, adjacent to the top of the two disk level deviation of less than 2mm; into a column
When installed, the horizontal deviation of the top of the plate should be less than 5mm.
7、The height of hanging distribution box installation must follow the height indicated in the design. The power distribution box is fixed to the wall with expansion bolts.
The diameter of the impact drill bit should be matched with the diameter of the expansion bolt when using the impact drill to hit the expansion bolt hole. In the fixed should be adjusted to the vertical
degree, flatness, fixed to be secure.
8, the grounding of the cabinet should be solid and good, each cabinet is suitable for separate grounding connection with the foundation steel, each cabinet from the back of the lower foundation steel
Steel side welding on the wiring nose, with no small dry 6mm2 copper wire and cabinet grounding terminal connected firmly.
9, the cabinet is equipped with electrical appliances open the cabinet door, should be bare copper soft wire and grounded metal frame reliably connected
Five, the second circuit wiring
1, the cabinet wiring current circuit should be used in the voltage of not less than 500v cross-section of not less than 2.5mm2 copper-core insulated wire, other return
Road wire cross-section should not be small dry 1.5 mm2, the electronic components circuit, weak circuit using tinhuang connection, in order to meet the flow rate and
Voltage drop and sufficient mechanical strength of the case, can use a cross-section of not less than 0.5mm2 insulated copper wire, the connection between the phases
Wires must pass through the terminal board, in accordance with the wiring diagram will be a sufficient number of lines straightened, tied neatly, set a good line number to the terminal board
On the wiring method should be consistent with the wiring method of the cabinet itself as far as possible.
2, the secondary circuit wiring should meet the following requirements: construction according to the diagram, wiring correct; wire and electrical components using bolted connections, plugging, welding or crimping, etc.
Plugging, welding or crimping, etc., should be solid and reliable: cabinet wire cores should not be damaged, there should be no joints in the middle of the wire: control
Cable core and the end of the wire should be marked with its circuit number, the number should be correct, the handwriting is clear and should not be decolorized; wiring should be
Neat, clear, beautiful: introduced into the cabinet cable should be neatly arranged, clear numbering, to avoid cross, and should be fixed firmly, shall not make the terminal row under stress.
Six, cabinet test adjustment
1, after the installation of the cabinet, should be clean and check the cabinet, check the layout of components, fixed, wiring, grounding is correct.
Reliable.
2, before power supply should be in accordance with the requirements of the specification for site testing, testing content including all phase and phase insulation resistance between the ground, with 1000 volts of megohm table for testing, the reading can not be less than 10 megohms.
Seven, the cabinet power supply test run and acceptance
1, power supply test run before acceptance should be done according to the design requirements of the official logo, including row number and line number.
2, power supply test run should strictly comply with national norms, regulations, in accordance with the power supply test run program implementation.
Post time: Aug-29-2022
