Reconstruction of the facility Youth creative forum Kitezha Plus - Repair of the internal power supply network

1. Common part.

In this working project, decisions were made on the reconstruction of internal electric networks of the Kitezha Plus youth creative forum at 30 Torzhkovskaya St. Petersburg. A. The project is based on:

- technical specifications for power supply;

- architectural and construction drawings and tasks of related departments;

- design tasks.

1.1 The working design is carried out in accordance with the requirements of the existing regulatory documents in the field of construction, fire and safety (SNiP, NPB, GOST, etc.).

Purpose of the installation.

3.1. The unit is intended for power supply:

- household electrical equipment;

- lighting of premises;

- as well as (computer and computer equipment, machine tools and workshop equipment, low-current systems).

3.2. Technical accounting of electrical energy is provided. To do this, three-phase electric power meters of the Mercury type 230ART203 F (P) CN are installed in the GRSCH. accuracy - 0.5S; 5 (7.5) A; 3x220/380B, tension connected via transformers 3hT066UZ, 150/5A, C. accuracy - 0.5S. For commercial accounting, the counters are configured in single tariff mode.

3.3. The boundary of the balance between consumers and the power supply organization is established in Cable Kiosk No. 1978 by cable tips KL0.4 kV outgoing to the Subscriber.

3.4. Electrical installation provides protection of people from electric shock, protection of equipment and cable networks.

4 Main technical solutions adopted in the project.

4.1. Load calculation is presented on the GRF diagram and is performed in accordance with regulatory documents.

4.2. For schematic electrical diagrams of boards, refer to sheets 2, 3, 6.

4.3. Refer to Sheets 4-5 for power supply network plans.

4.4. In the electrical switchboard room on the 1st floor of the building, the main switchboard is installed. Protection and metering devices are selected in accordance with the current load.

4.5. Under the electrical panel room there is a room for feeding cables.

4.6. Electrical mains gaskets in the building comply with GOST R50571.1597 "Wiring." Main networks from GRF to boards are laid in trays and metal pipes.

Group networks to electric receivers are laid in corrugated pipes on walls, under the ceiling, descents to electric receivers in bars in corrugated pipes.

4.7. Sections of wires and cables are checked by long-term permissible load current, loss of voltage, protection devices - for actuation of el/magnetic disconnector to single-phase short circuit current.

4.8. Power distribution boards built in. Degrees of shield protection:

- IP54 - basement, attic, shields of assembly hall;

- IP31 - floor lighting boards and power panels.

If embedded boards cannot be used, curtain boards are used. The top of the shields shall not exceed two meters from the floor level. Shields should be placed in such a way as not to impede the movement of persons.

4.9. On each floor, in the niches of building structures envisaged by the construction part of the project, install domestic electrical panels, which provide for the installation of cable network protection devices. These boards supply the lighting system, socket network and process equipment. Boards include circuit breakers for protection of group power supply lines of electrical equipment, RCD on power supply line of plug sockets. Electrical equipment of the premises is performed in accordance with the requirements of SPZ11102003.

Power supply of the building boards is provided by IWGn cable or cable with similar parameters from the GRL.

4.10. Power supply of staircases lighting fixtures, as well as emergency lighting for evacuation, is performed by independent lines from CAS by IWGng cable or by cable with similar parameters.

4.11. Lighting of rooms is carried out by lamps with fluorescent lamps.

4.12. The types of lamps are selected in accordance with the nature and purpose of the premises. Types of lamps are indicated on the plans. The lighting of the premises is taken in accordance with the normative. The calculation of artificial lighting of characteristic rooms is made using the Dualux program.

4.13. The design provides for the following types of lighting :

- working;

- emergency (evacuation lighting).

Nevertheless, in addition, in order to ensure the safe evacuation of people from the premises of the facility in conditions of insufficient illumination, the project provides for equipping the rooms with wearable sources of evacuation lighting (lights).

4.14. Power supply of working and emergency lighting is provided from different sections of the hydraulic system.

4.15. Evacuation lighting is provided in corridors, main passageways serving for the evacuation of people, on stairs, lamps with the inscription "Exit," lamps at the entrances to the building.

4.16. Control of working lighting of rooms - individual (switches installed in rooms).

4.17. In accordance with PUE requirements, differential machines are provided for groups of high-risk electric receivers.

4.18. To protect personnel from electric shock, all metal non-current-carrying parts of electrical installations are grounded in accordance with PUE.

4.19. The main potential equalization system of the building is made. As a result, the design provides for the connection of the newly laid CS and the mounted equipment of the electrical installation to the existing potential equalization system of the building, as well as monitoring the implementation of the combination of the following conductive parts on the main grounding bus (GZSH1) located in the room of the electrical shield and grounding bus (GZSH2) located in the room of the heat center (basement):

- RE DBU tire;

- steel pipes of utilities entering the building;

- metal parts of building structures;

- lightning protection.

4.20. Due to the application of the FOREND active lightning protection system in the design, it is not necessary to organize the grounding loop. To implement the grounding and current lead for lightning receptors, a depth grounding device of the active lightning protection system is used. (See the project section. Sheet. 7.4.)

4.21. Combine the current removal conductors of the active lightning protection system and the grounding system in control well No. 1.

4.22. Potential equalization conductors between stationary metal structures (water pipes, heating pipes, etc.) and potential equalization bus shall be of copper with a section of not less than 25 mm2.

4.23. All potential equalization conductors shall be isolated and marked in green (yellow).

4.24. Ground the building in accordance with the calculation of the grounding device (see annex).

4.25. All electrical equipment shall have a certificate of conformity

Gosstandart of Russia.

4.26. The electrical equipment specified in the design can be replaced with equipment of other grades of similar rating and operational design (corresponding Degree of protection):

- electric panels housing;

- circuit breakers;

- electrical installation articles;

- lamps.

5 Information on organization of production and maintenance of installation works

5.1. Installation of cable network and electrical installation equipment shall be carried out in accordance with PUE, rules and safety measures during operation of electrical installations, specified in POTRM0162001 g, SNiP 3.05.0665.

5.2. Install the equipment in accordance with the certificate.

5.3. Installation is recommended in the following sequence:

- preparatory works;

- installation of casings in walls and floors;

- laying and drawing of cables and wires;

- installation of cabinets, boards and other equipment;

- installation of installation items;

- insulation resistance check.

Plant maintenance.

7.1. The main purpose of plant maintenance is to maintain its operability during the entire service life.

7.2. Organization of operation, maintenance of electrical equipment is carried out in accordance with the approved instruction.

7.3. Plant maintenance regulations shall be developed by the customer on site in accordance with the manufacturer's instructions and taking into account the requirements of PUE, POTRM0162001 g, SNiP 3.05.0665.

9 Environmental protection measures.

9.1. In the operating mode there is no negative impact of the plant on the environment.

9.2. There are no special measures for environmental protection in emergency modes.