Design documentation of power supply system
We have completed the development of design documentation, and then installation and commissioning of the power supply system (EM) of the Physical Fitness and Health Complex.
Electric equipment of a swimming pool, dry heat rooms and a Turkish bath (developed according to a separate composition of the project); - electrical equipment of the food processing unit; - electrical equipment of an individual heating point; - pumping equipment; - welding equipment; - technological equipment; - socket network, broadcast TV; - computer networks; - electric lighting; - communication and alarm systems; - automation systems. The estimated power of power consumers is 400 kW, including electric lighting - 60 kW. In terms of ensuring the reliability of power supply, power consumers belong to category I and are powered at 380 / 220V, 50Hz. For the input and distribution of electricity between the electrical receivers of the building, the project provides for two main switchboards MSB, assembled on Schneider Electric equipment, which are located in the switchboard rooms of the basement and the first floors. The power supply of each MSB is carried out via two mutually reserved cable lines. At the inputs of each MSB provides for the accounting of electrical energy.
Electric power meters installed in separate cabinets of accounting. For the distribution of electricity between the final consumers of the building, the project provides for secondary switchboards, assembled on Schneider Electric equipment and installed in electrical niches. The power of the shields is carried out from the MSB. Power networks are carried out with cable VVGng-LS and laid: - in the corridors - behind suspended ceilings in metal trays of the Vergokan company and hidden along the walls in steel pipes under a layer of plaster (to the outlets of cleaning mechanisms); - in shower rooms, dressing rooms, bathrooms and other rooms with slatted ceilings - for PVC pipes (if there is a fire safety certificate for pipes and ceilings), along walls to electrical receivers in PVC pipes hidden under the plaster layer or behind the facing of premises ; - in office premises and offices - behind a suspended ceiling in a steel pipe, along walls in cable channels of the Legrand company; - in the dining room, buffet, lobby - in steel pipes behind the ceiling and hidden.
DESIGNING THE ELECTRICAL SUPPLY OF THE PHYSICAL CENTER
on the walls under a layer of plaster; - in the gym - hidden in steel pipes under a layer of plaster; - in rooms without a false ceiling - on the ceiling and walls in the mini-plinths of the company "Legrand"; - in technical rooms - open on the walls and ceiling along the mounting strip; - in interfloor risers - in steel pipes. The power supply network of the fire hydrant buttons is performed by the control cable KVVGng, which is laid in steel pipes. To protect service personnel from electric shock and the normal operation of electrical equipment, the project provides for a grounding system TN-C-S with PEN conductor separation at the MSB inputs. The power supply network with the type of current-leading conductor systems was adopted in the construction: - single-phase, three-wire; - three-phase - four and five-wire. The project provides for the re-grounding of the PE protective conductor, for which the PE buses of the MSB are connected with steel strips of 40x4mm to the main grounding buses GZSh, which are installed in the switchboard rooms of the basement and first floors. In each technical room of the building, the project provides for internal circuits of protective earthing. As the grounding lines, steel with a cross-section of 25x4mm is used, laid openly along the wall at a height of 0.3 m from the level of the floor around the perimeter of the premises. Earthing circuits are separated by two earthing conductors at two points on the main earthing busbars. By lightning protection device construction belongs to category III. Lightning protection is carried out by imposing on the roof of the building an interception grid filled with round steel ∅8mm cells 12x12m and connecting it to an external grounding device with the help of current leads made of round steel через8mm through 25m . Lightning conductor mesh and current leads are being developed.
PROJECT DOCUMENTATION OF ELECTRICIAN
in the project section of the brand "AR". This project provides the main potential equalization system, which interconnects the following conductive parts: - conductor (PEN) of the supply line; - grounding conductor connected to the grounding; - metal pipes of communications entering the building; - ventilation and heating systems; - metal enclosures of equipment and apparatus; - lightning protection. The specified parts must be connected to the main grounding bus with the help of potential equalization system conductors. In the rooms of the dry heat and Turkish bath, the potentials are to be leveled using a grid laid in the floor with a cell pitch of 250x250mm made of steel wire ∅6mm. The grid at two points is connected to the main grounding bus with a protective conductor. The grid for equalization of potentials is developed in the project section of the brand "AR". As an additional measure of protection, installation of protective disconnect devices (RCD) on the lines supplying power sockets is provided. In places where cables pass through walls and exit them to the outside, in order to prevent water penetration and fire spreading, seal up the gaps between cable and pipe, as well as reserve pipes of easily removable mass from fireproof material. All installation work should be carried out in accordance with this project, PUE, SNiP, GOST and other guidance documents, and in accordance with the technical and operational documentation for the installed equipment. LIST OF WORK TYPES FOR WHICH IT IS NECESSARY TO DRAW UP THE CERTIFICATES OF HIDDEN WORKS Hidden wiring in pipes in the wall and in pipes behind the suspended ceiling.