【 Weak current College 】 electrical, electronic and fire fire alarm installation project overseeing Regulation (2)

5. on the installation of the operating procedures and methods of supervision

1. substation equipment installation
(1) comply with the following construction process:
Equipment shipped to site and installation of machines and tools for ontology and accessories for apparatus for checking installation grounding (zero) in the laying of electrical test extension ontology seal check pilot;
(2) equipment at the scene supervision should be made with the owner, contractor: following acceptance check
① equipment type specifications must conform to the design requirements, accessories, spare parts and complete;
② factory of technical papers should complete well-found;
③ Press the electric equipment installation engineering and construction acceptance of law for Visual inspection.
(3) high-voltage switch cabinet, power distribution box, equipment, technical information, quality assurance and product certification must complete, the device remains intact, annex, accessories complete.
(4) the Cabinet base channel installation is complete, the strict implementation of the electrical equipment installation engineering construction and acceptance of GBJ50171-92, particularly high or low cabinet base channel installation level error shall not exceed 5/1000, reliable grounding. Cabinet and the Cabinet between bolt connections, the top level row counter is less than 5 mm deviation, disc surface perpendicularity of less than 5 mm;
(5) basic track should level transformer, gauge and the track gauge should fit and equipped with a gas relay transformer should make its top cover along the flow direction of gas relay 1-1.5% rise slope (factory shall not be required unless the gradient). Equipped with a scroll wheel in the wheel rotating flexible transformer, the transformer in place will be demolished wheel brake system be fixed;
(6) transformer on the runtime checks for the following provisions:
① neutral grounding system of transformers in shock during closing one of grounded in good condition;
② transformer first input voltage switch-on, when you full (if conditions are starting from zero pressure), closing the input voltage;
③ first electricity after 10 minutes duration, there is no anomaly observed transformer.
(7) quality standards and test methods:
Quality standards and test methods of observing the 10kV substation construction acceptance ".
(8) Note supervision and construction units to overcome the following common problems:
① box with holes is not accurate, using electricity, gas welding-cutting holes and electric pipe diameter size does not meet the requirements;
② Cabinet and Cabinet gap between the high side, the underlying channel embedded biased, school usually not carefully.
(9) provide the following verification data:
① voltage test records and the insulation resistance values;
② low voltage electrical adjustment, setting records in the table;
③ product certification and factory test records;
④ construction electrical substation shizi Division Engineering sub-item project qualitative assessment table installed.
2. cabling and cable bridges.
(1), the part of the process of construction in compliance with the following construction:
Product quality check on line positioning trenching cabling, sand, cover brick backfill do Terminal wiring of electrical performance testing;
(2), the cable laying is strictly a stranded twist, armored flattening, sheath faults and surface defects such as severe scratches, buried cable is forbidden in the pipe above and below the parallel laying. Cable laying of coordinates and elevation is correct, neat and tidy, flag clear towards the right, anti-burning, heat insulation and anticorrosion protection measures complete required;
(3) in the laying of cables on the bracket, the order fixed reliable, correct, control cable in the power cable, cable turning and branch office not disorder, to tidy that flag is clear, buried cable of concealed work record and coordinate graph is complete and accurate;
(4) the Cable Tray Installation fixed using bolt, nut firmly towards the outer join is not loose, stop using the electrical or gas welding and cutting of the cable tray accessories, hanger, branch, Bay and embedded parts fixed use of electric welding welding, cutting and welding parts should brush color anticorrosion paint and rust primer;
(5) tube thread should be in the building of plastering and surface engineering conduct after the end of the thread before the canal water and debris clean-clean, lead in tubes without joints and kink, pipe mouth place to install protective wire retainer;
(6) provide the following verification data:
① product specifications, certification, testing and installation instructions and other documents;
② installation works and subtle technical documentation.
3. apparatus and distribution box installation:
(1) comply with the following construction process:
Apparatus, power distribution box approach, the installation of machines and tools for lamps, switches, installation switchboards installation wires and insulation resistance test apparatus connected power commissioning;
(2) distribution box installation location is correct, the part is complete, the appropriate box, cut a hole, multiple tube box neatly arranged in neat, tube, pipe and tank fastening, crimp reliable, power distribution Cabinet close to the wall, the zero line by bus (zero Terminal), connect a clear ranking, no splicing phenomenon;
(3) conductors and apparatus firmly close, not hurt the core wire, wire connections without loosing compressing, bolted on the same terminal when the conductor is not more than two, washers accessories are complete;
(4) switch to cut off the line, Edison lampholders phase line should add contacts and the Terminal in the Centre. Three-phase socket wiring phase sequence arrangement consistent with receptacle left zero right fire wire, single-phase three holes, three-phase four-hole socket directly above the Earth wire connected. Outlet is not grounded individual route and ground zero line mix business with pleasure, with yellow and white-color line;
(5) the branch circuit insulation resistance test qualified before the lamp test, the insulation resistance is generally not less than 0.5 m Ω;
(6) quality standard and acceptance methods comply with:
Install the construction electrical engineering construction quality approval standard "GB50303-2002
The architectural engineering construction quality approval unification standard GB50300-2001
(7) to supervise the construction units to overcome the following common problems:
Distribution box, the installation does not meet the requirements: box body not just from the ground an inconsistent, grounding position chaos received, the branch line and head out now, no circuit number box and external pollutionDyeing;
(8) verification of the information provided is as follows:
① manufacturers provide product manual, product test reports and certificates;
② concealed work records table;
③ apparatus and distribution boxes, and other installation record datasheet and sub-item project quality approval sheet.
4. low-voltage electrical installations.
(1) comply with the following construction process:
Low pressure electric appliance approach, installation and test equipment for low-voltage electrical appliances installed before checking installed electrical actuator installation electrical grounding wire welding (zero) in the laying of electrical insulation measurement extension resistance test engineering acceptance;
(2) electrical devices and equipment arrives, supervision engineer and the owner, contractor acceptance inspection for the following:
① electrical specifications should meet the design requirements, annex complete spare parts;
② electrical product technical documentation is complete;
③ Press the electric equipment installation engineering construction and acceptance of the relevant provisions for Visual inspection.
(3) low-voltage electrical installation, construction project should meet the following conditions:
① demolition on the electrical installation is prevented by the template, scaffolding, etc., the venue clean;
② indoor floor base construction has been completed, and mark the wall plastering elevation;
③ equipments Foundation and framework to allow installation of strength, the mechanical strength of welded components meet design requirements;
④ embedded parts, reserved hole location and size to fit the design requirements, embedded parts solid and reliable.
(4) electric external wiring should meet the following requirements:
① Press the electric wiring connection end flag;
② in General, the power supply side wire should be connected in line-end (fixed contact terminals), load side wires should be received at the outlet end (movable contact terminals).
(5) low-voltage electrical insulation resistance measurement should satisfy the following requirements:
① measuring site; contact the disconnect location, with very spacious and outlet side; contact in the closed position, very different parts of the belt; the potential live parts and metal shell;
② to measure insulation resistance using a megohmmeter voltage level can use 500 Volt or 1000 Volt megohmmeter, insulation resistance value not less than 0.5 m Ω.
(6) low-voltage electrical equipment according to its nature and installation site load for testing and tuning, should meet the design requirements;
(7) quality and acceptance criteria:
Install the construction electrical engineering construction quality approval standard "GB50303-2002
The architectural engineering construction quality approval unification standard GB50300-2001
(8) verification information is as follows:
① product specifications, test records, certificates of competency;
② motor test record sheet;
③ motor inspection and wiring sub-item project quality approval sheet.
5. lightning rod (network) and earthing devices installed:
(1) comply with the following construction process:
Materials and equipment for grounding installation grounding installation laying down lead (net) installed lightning rod installation grounding resistance tests;
(2) roof installations of lightning network and metal components should be welded into a whole, down lead should use welding;
(3) lightning network and down lead and ground installations of fasteners should be used galvanized products;
(4) electrical appliance should tie in with the ground engineering construction at the same time, its hidden section first for intermediate inspection and acceptance;
(5) grounding (line) in depth from the surface to 1m, grounding of the pin should be anti-corrosion treatment, use galvanized flat steel welding of pin site anticorrsion paint brush should be compensated;
(6) vertical grounding of spacing of not less than twice the length and spacing of horizontal grounding not greater than 5m, grounding and buildings should not be less than the distance; 3m
(7) electrical apparatus partial each grounding should be separate to the grounding line and connected to the grounding line shall not be a grounding in the concatenation of several part needs to be grounded;
(8) quality and acceptance criteria:
Install the construction electrical engineering construction quality approval standard "GB50303-2002
The architectural engineering construction quality approval unification standard GB50300-2001
(9) supervise the construction units to overcome the following common problems:
① downlead lightning line not straight, not firm, downs and bending phenomenon, earth-leakage phenomenon cushion spring ring, etc.;
② grounding and zero line mixed received;
③ grounding electrodes into the underground depth, grounding depth, welding section is not standard.
(10) provides the following verification data:
① concealed work inspection record form;
② grounding resistance test record sheet;
③ sub-item project quality approval sheet.
6. construction and installation of structured cabling systems
(1) comply with the following construction process:
Construction inspection (pipe embedded, environment, equipment, safety, fire) device installation and cable laying cable termination system test
(2) the civil reserve hole, room surface settings, security, fire protection requirements for conformance to design requirements
(3) the equipment arrived at the scene, and the owner, contractor and make the following checks:
① appearance inspection certificate of manufacture, inspection reports;
② type, specifications, quantity complies with the requirements of the design;
③ various technological file is complete;
④ cable Fiber electrical properties, electrical properties of the test.
(4) equipment installation check: check the delivery room, equipment rooms, equipment rack, rack, wiring parts and various modules of the specification, the appearance, position, vertical, horizontal, and so meets the requirements, signs are complete, all bolts are tightened, the installation process, grounding and shielding, earthquake reinforcement and other installation meets the requirements.
(5) cable layout: trunking cable tray and place the cloth installation, installation, grounding, cloth line craft comply with the requirements; cables concealed, the piping, trunking, such as specifications, position, take the rightIndeed, in line with the design; when demand protection settings protection meets the requirements.
(6) cable end construction, eight-bit mode universal socket and wiring parts, fibre and various jumpers technology to meet the required, line order in strict accordance with T586B standards.
(7) system tests focus on engineering of electrical properties and cable characteristics for testing, test must include the following:
① connection diagram;
② length;
③ attenuation;
④ proximal crosstalk (both should test);
⑤ equipment required to test content;
⑥ power test records;
⑦ grounding system testing.
(8) verification information is as follows:
① equipment, equipment list and manual, certificate, test records;
② test records;
③ acceptance record;
④ concealed work inspection records;
⑤ sub-item project quality approval sheet.