1 0 electrical installation works
1 0.1 Description
1 0.1.1 The provisions of this chapter apply to the following work content of this project
(1) Construction and installation of lightning protection and grounding devices for drainage culverts;
(2) Installation and commissioning of the electrical lighting device of the gate hoisting machine room;
(3) Construction and installation of a PK-110 PLC local control cabinet foundation;
(4) laying of pre-embedded pipes for power cables and control signal cables;
(5) The contractor of the project should actively cooperate with the contractor of the civil engineering project of the pumping station and the contractor of the computer monitoring system of the pumping station to do the installation and commissioning of the relevant electrical equipment and computer monitoring system, and do the fittings, iron fittings, etc. according to the construction design requirements. Pre-buried work of materials.
10.1.2 Provide the auxiliary materials required to complete the above installation and commissioning projects;
1 0.1.3 Installation and commissioning of electrical equipment as specified in other clauses of this chapter;
1 0.1.4 The installation work also includes the commissioning and commissioning of various equipment as stipulated in the contract, as well as the installation of various temporary facilities necessary for the trial operation;
1 0.1.5 The test items and standards of electrical equipment shall be implemented in accordance with the relevant provisions of the “Electrical Equipment Handover Test Standards†(GB50140—9 1);
1 The electrical equipment and equipment used in 0.1.6 must be qualified products that meet the current national effective technical standards and have qualified certificates. The equipment shall have a nameplate and shall indicate the date of manufacture and the number;
1 0.1.7 The contractor must strictly follow the construction drawings (including technical specifications, design modification notices) and the requirements of the supervision unit for the construction of the electrical installation project. If the design modification is required, the design unit and the supervision unit should be obtained. Written consent. The revised content should be recorded in detail and used as the basis for drawing the as-built drawings and acceptance;
1 0.1.8 The construction, installation and commissioning of electrical equipment shall be carried out in accordance with the provisions of this chapter, and shall also comply with the current effective standards, regulations, specifications and relevant regulations issued by the State. Standard implementation, otherwise implemented in accordance with ministerial standards of the relevant ministries:
1 The unit price listed in the 0.1.9 engineering quantity quotation form includes all the labor costs, material costs, mechanical commissioning fees, commissioning fees, other fees and indirect fees required to complete the above electrician operations.
1 0.2 Electrical equipment construction and commissioning
1 0.2.1 lightning protection grounding and electrical lighting device
1 0.2.1.1 Description
(1) The lightning protection belt is installed on the roof of the hoisting machine room, and ¢10 galvanized round steel is adopted. A concentrated grounding grid is arranged on the upstream and downstream of the gate bottom plate. The grounding net is made of 40×4 galvanized flat steel and is reliably connected with the main rib of the brake floor. The grounding device of the sluice gate shall be connected with 40×4 galvanized flat steel and the main grounding net of the pumping station, and the grounding resistance is less than 0.5Î.
(2) Construction and installation of lightning protection grounding devices and electrical lighting devices shall be carried out in accordance with the electrical construction design drawings. .
(3) The following metal parts of the electrical installation shall be grounded or connected to zero:
1) Metal base and casing for motors, electrical appliances, portable or mobile electrical appliances, etc.
2) Transmission of electrical equipment.
3) Metal or reinforced concrete frame of the distribution equipment inside and outside the house and metal barriers and metal doors near the live parts.
4) The base of the metal frame such as the screen (cabinet, box) for power distribution, control, and protection.
5) The connector box of the power cable, the metal casing of the terminal and the expander, the metal sheath of the cable, the accessible cable metal protection tube and the threaded steel pipe.
6) Cable trays, brackets and derricks.
7) Control the metal sheath of the cable.
1 0.2.1.2 Grounding device laying
(1) The depth of the top surface of the grounding body shall be in accordance with the design regulations. Except for the grounding body, the vertical part of the grounding body lead wire and the welding part of the grounding device shall be treated with anti-corrosion treatment; before the anti-corrosion treatment, the surface must be rusted and the flux remaining at the welding place shall be removed.
(2) The spacing of vertical grounding bodies should not be less than 2 times their length. The spacing of the horizontal grounding body should meet the design requirements. When there is no design rule, it should not be less than 5m.
(3) The grounding trunk should be connected to the grounding grid at two different points and above. The natural grounding body should be connected to the grounding mains or grounding grid at two different points and above.
(4) The grounding of each electrical device should be connected to a separate grounding wire and grounding trunk. Do not connect several electrical devices that need to be grounded in a grounding wire.
10.2.1.3 Connection of grounding body (wire)
(1) The connection of the grounding body (wire) is welded, and the welding must be firm and free of solder joints. Connect to the grounding wire on the electrical equipment and apply galvanized bolt connection: If the non-ferrous metal grounding wire cannot be welded, it can be connected by bolts. The contact surface of the bolt connection shall be handled in accordance with the current national standard "Code for Construction and Acceptance of Bus Installations for Electrical Installations" (GBJ 1 49 90).
(2) The welding of the grounding body (wire) shall be lap welding, and the lap length must meet the following requirements:
1) Flat steel is 2 times its width (and at least 3 edges are welded).
2) Round steel is 6 times its diameter.
3) When the round steel is connected with the flat steel, its length is 6 times the diameter of the round steel.
4) When welding flat steel and steel pipe, flat steel and angle steel, in order to make the connection reliable, besides welding on both sides of the contact part, it should be welded with a curved (or right-angled) clip bent by steel strip or directly The steel strip itself is bent into an arc (or a right angle) and welded to the steel tube (or angle steel).
1 0.2.1.4 Prior to the construction of electrical lighting installations, the formwork and scaffolding that are obstructed by the installation of the lamps shall be removed; the plastering of the ceiling and wall shall be completed, and the ground cleaning shall be completed; after the completion of the construction, the building shall be partially The damaged part should be repaired.
1 0.2.1.5 The construction and installation standards and process and construction acceptance contract of the grounding device shall be in accordance with the “Code for Construction and Acceptance of Grounding Devices for Installation of Electrical Installations†(GB50 1 69--92). The construction and installation standards and process and construction acceptance contract of electrical lighting equipment shall be in accordance with the provisions of “Code for Construction and Acceptance of Electrical Installations for Electrical Installations†(GB5025 9~96).
1 0.2.2 Gate local control cabinet foundation completed installation
1 0.2.2.1 General
(1) The construction of the construction project related to the installation of the local control cabinet of the gate shall meet the following requirements:
1) The civil works quality of buildings and structures related to the installation of the gate control cabinet and the secondary circuit connection line shall comply with the relevant provisions of the current national construction engineering construction and acceptance specifications. When the equipment or design has special requirements, it should still meet its requirements.
2) The civil works before installation shall have the following conditions:
1 The roof and floor slabs are completed and there shall be no leakage;
2 End the indoor ground work, there is no water or debris in the indoor channel;
3 The embedded parts and reserved holes meet the design requirements, and the embedded parts should be firm:
4 doors and windows are installed;
5 All decorative work that may damage the installed equipment or the equipment cannot be constructed after the decoration work is completed.
(2) Rugged parts for equipment installation, galvanized products, and standard parts.
(3) After installation and commissioning, the reserved holes and cable nozzles in the building should be sealed.
(4) The construction, installation and acceptance of the local control cabinet of the gate shall be in accordance with the provisions of GB5 0 1 7 1-92 in accordance with the "Code for Construction and Acceptance of Electrical Installation Installation Panels, Cabinets and Secondary Circuit Connections". The provisions of the standard specifications.
1 0.2.2.2 Basic steel installation
Foundation steel installation: The allowable deviation shall comply with the requirements of Table 1 O 2-1.
Table 10 2-1 Allowable deviation of basic steel installation
10.2.2.3 Screen and cabinet installations The following inspections shall be carried out during construction and handover:
(1) Whether the completed project meets the design;
(2) Whether the quality of the project meets the requirements;
(3) Whether the adjustment, test items and their results meet the requirements of the regulations;
(4) According to the "Electrical Installation Installation Engineering Panel, Cabinet and Secondary Circuit Connection Construction and Acceptance Specifications" (GB5 0 1 7 1--92), the technical information and documents are complete.
1 0.2.3 Cable laying
10.2.3.1 General
(1) Before the installation of the cable line, the construction project shall have the following conditions:
1) The embedded parts conform to the design and are firmly placed;
2) The end of the work and the surface of the trenches, shafts and manholes;
3) The temporary construction facilities, formwork and construction waste of the cable layer, cable trench, etc. are cleaned up, the construction road is smooth, and the cover is complete:
4) After the laying of the cable line, the construction work that can no longer be carried out should be completed;
5) The cable ditch is drained smoothly.
(2) The steel tight fittings for the installation of cables and their accessories shall be hot-dip galvanized products in addition to the anchor bolts.
(3) Before the installation of the cable line is completed, the construction project should complete the construction engineering modification work caused by the need for the addition, opening and reaming of the embedded parts.
1 0.2.3.2 Cable tube processing and laying, cable bracket preparation and installation
(1) The processing of cable ducts shall meet the following requirements:
1) The cable tube should not have perforations, cracks and significant irregularities, and the inner wall should be smooth. The nozzle shall be free of burrs and sharp edges and corners, and the nozzle shall be flared;
2) After the cable tube is bent, there should be no cracks and significant concave sag. The degree of bending should not be greater than 1% of the outer diameter of the tube; the bending radius of the cable tube should not be less than the minimum allowable bending of the cable. radius.
3) The metal cable tube should not be seriously rusted. The exterior should be coated with anti-corrosive paint or bitumen. The zinc coating of the galvanized tube should also be coated with anti-corrosive paint.
(2) The elbow of each cable tube should not exceed 3, and the right angle bend should not exceed 2.
(3) The connection of the cable tube should meet the following requirements:
1) The connection of the metal cable tube should be firm, the seal should be good, and the two nozzles should be aligned. The length of the sleeved short sleeve or threaded fitting shall not be less than 2.2 times the length of the outer tube of the cable. Metal cable tubes should not be directly butt welded.
2) When the rigid plastic pipe is socketed or plugged, the insertion depth should be 1.5 to 1.8 times the inner diameter of the pipe. Sealed on the mating surface with glue; when sleeved, the ends of the sleeve should be sealed.
(4) The cable pipe shall meet the following requirements when it is applied:
1) The cable tube should be installed firmly; the distance between the support points of the cable tube should not exceed 3m when the design is not required.
2) When the straight length of the plastic pipe exceeds 30 m, it is advisable to install a telescopic joint.
(5) The laying of cable ducts shall meet the following requirements:
1) The buried depth of the cable tube should not be less than 0.7m. When laying under the sidewalk, it should not be less than O. 5m.
2) The cable tube should have a drainage gradient of not less than 0.1%.
3) When connecting the cable tubes, the tube holes should be aligned, the joints should be tight, and no groundwater or mud should penetrate.
1 0.2.3.4 Installation quality standards and process and construction acceptance of cables and lighting lines shall be in accordance with the “Code for Construction and Acceptance of Cable Lines for Installation of Electrical Installations†(GB 5 0 1 68 92), “Installation of Electrical Installations†Execution of the provisions of the Code for Construction and Acceptance of Wiring of Group 1 KV and below (GB5 025 8—96)
1 O. 3 acceptance terms
1 0.3.1 Change the design documentation and construction details or actual completion drawings.
1 0.3.2 Instructions, test records, certificates of conformity and installation drawings provided by the manufacturer.
1 0.3.3 Installation technical records, including equipment inspection and installation, quality inspection records, etc.
1 0.3.4 Installation and acceptance of electrical equipment, power cables, lighting lines and grounding devices shall comply with the relevant requirements of the electrical installations mentioned in this chapter, but also meet the following requirements (but not limited to) :
(1) Electrical equipment installation engineering electrical equipment handover test standard (GB50 1 50--1);
(2) Specification for construction and acceptance of rotating electrical equipment for installation of electrical installations (GB50170_92):
(3) Specification for construction and acceptance of bus installations for electrical installations (GBJl49-90);
(4) Specification for construction and acceptance of low-voltage electrical installations for electrical installations (GB50254 96);
(5) Specification for construction and acceptance of electrical installations for electrical installations (GB50256--96);
(6) Specification for construction and acceptance of electrical installations for electrical installations and explosion hazards (GB50257~96).
1 0.4 Measurement and payment
(1) The payment for all installation and construction projects specified in this chapter shall be paid according to the unit price of the project listed in the “Engineering Quantity List†and the amount of work actually incurred and confirmed by the supervision engineer.
(2) The equipment and materials purchased by the contractor include all installation equipment (including ancillary equipment) in the unit price, from the factory acceptance, receiving, transportation, storage, installation, field test, commissioning, commissioning, quality inspection and acceptance. And all the labor, equipment and auxiliary facilities required for maintenance before the completion of acceptance.
(3) The contractor is responsible for the installation, commissioning of electrical equipment, etc. The unit price includes all the installation equipment required for storage, installation, field test, commissioning, commissioning, quality inspection and acceptance, and maintenance before completion acceptance. All the costs of artificial materials, equipment and ancillary facilities.
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