Designing electricians energy training center
The completed design of the Training Center in terms of installing the electrician.
DESIGNING THE ELECTRICAL EDUCATION CENTER
The main indicators of the electrical installation were developed on the basis of: "Internal electrical equipment" Section - approved technical task; - architectural and construction plans; - tasks related sections. Power supply The nominal power consumers of the complex belong to the III category of power supply reliability. I includes: categories of reliability (powered from an uninterruptible power supply) technical means of fire protection systems: - automation equipment for fire protection systems; automatic fire alarm equipment; fire alarm and evacuation control equipment; light indexes of house number and indexes of fire hydrants; - security alarm equipment, access control and management systems, security television systems; evacuation lighting; - emergency lighting; - equipment of internal telephone network, server equipment; - equipment for automation and management of building engineering systems.
- Power supply of power consumers of the first category of power supply is divided into 2 UPSs: - UPS 1: technical means of fire protection systems, light indicators of the house number and signs of fire hydrants, security alarm equipment, access control systems, security television systems, automation equipment and engineering systems management building; - UPS 2: equipment of an internal telephone network, equipment server. power supply, requiring the category of reliability under operating conditions 2. Uninterruptible power supply I electrical receivers I are supplied with electric power from an uninterruptible power supply (UPS). UPS connection circuits must include manual bypass. Electric lighting and socket networks Lighting is performed: in auxiliary and technical premises - lamps with T8 fluorescent lamps - colors not lower than 830. Lamps to use with the possibility of replacing fluorescent lamps with LED ones without changing the lamp case; in halls, corridors, office spaces
PROJECT DOCUMENTATION OF ELECTRICS
- lamps with LED lamps. - (see separate DALI. Energy-saving electric lighting control schemes (System project)). In places of rare finding of people and in bathrooms the control of lighting by means of presence sensors is provided. Emergency lighting (safety and evacuation) is made of combined lamps, equipped with emergency power supply units with batteries. Outlet sockets are taken with a grounding contact in the form of side contacts (German standard). The cabling of the working lighting and household rosette networks are made of cable with insulation of cross-linked polyethylene, NG-Ls, which does not support combustion. Emergency and evacuation lighting networks are performed with a cable with the FRLS index. Networks must be made with cables with copper conductors in a sheath that does not propagate burning. Electric lighting evacuation Evacuation lighting should be performed along the evacuation routes of the object, in the corridors, lobbies, halls, and on stairwells. Light indicators should be equipped with batteries. Power supply network 380 / 220V Power consumers are powered at 380/220 V by a five-wire system with dedicated zero working (N) and zero protective conductors (PE). (system TN-S). The power supply system provides: reliable power supply of the object's electrical receivers;
- dispatching control of parameters and control of the state of the main nodes of the system with - using graphic mnemonic schemes; maximum unification of the block-modular design principle of schemes, which allows - to quickly replace defective nodes and elements. For the organization of power supply to consumers belonging to the first category of power supply reliability, a UPS with batteries is provided. For power supply of computers of office premises the guaranteed power supply from local UPS is provided. I LIE and large assemblies should consist of one-sided maintenance panels and are made of steel with an anti-corrosion coating with a degree of protection not lower than IP31, and the controls of the apparatuses should be located behind the doors of the panels that are locked with a key. The panels are equipped with instrumentation included in the building management system.
WORK DOCUMENTATION POWER SUPPLY
A group network of indoor lighting and a socket network are made of cable laid in trays in non-combustible PVC pipes. PVC pipes are difficult to comply with fire safety standards (airbag 246-97) and have a fire safety certificate.
Parameters controlled by VRU: the value of the currents in phases on the input and outgoing lines; - voltage value at inputs and sections (linear and phase); - frequency.
- Electrical safety measures The power of the building's electrical receivers is supplied from a 380 / 220V network with a grounding system of the TN-C-S type. All exposed conductive parts of electrical installations are directly connected to the grounding point of the power supply through the combined PEN conductor of the supply cable lines. The point of separation into zero working and zero protective conductors is located in the VRU, where the Main Grounding Bus is installed. The main potential equalization system was designed at the entrance to the building by combining the following conductive parts on the main grounding bus: - PEN-conductors of supply lines; - the grounding conductor of repeated grounding on input to the house; - metal pipes of communications; - metal parts of building structures, lightning protection. The main grounding busbars (GZSH) of the water-distributing devices are interconnected by a potential equalization conductor. The system of additional equalization of potentials should interconnect all simultaneously accessible to the touch open conductive parts of stationary electrical equipment and third-party conductive parts, including accessible metal structures of the building, as well as zero protective conductors. For bathrooms, an additional potential equalization system is mandatory and must provide, among other things, the connection of third-party conductive parts extending outside the room. As an additional system of protection against electric shock, the project provides for the installation of differential automata with a leakage current of 30 mA in apartment panels. Lightning protection In accordance with RD 34.21.122-87, the projected building belongs to category III lightning protection. Protection of buildings from direct lightning strikes is performed by imposing on the roof an intake mesh made of steel. Speakers above the roof ² wire d10mm or strip 25x4mm with cells with an area of no more than 100m metal elements (pipes, shafts, ventilation devices) should be attached to an interception grid, and no natural ventilation risers should be connected to the interception grid of umbrellas. they fall under the protection zone of the lightning receiving grid at mark 48, 800. The conductors from the interception grid should be laid to the grounding at least 25m around the perimeter of the building. As the current leads, reinforcement of reinforced concrete structures should be used, provided that a continuous electrical connection is provided to the connections of the structures and the reinforcement bars with the lightning rods and the grounding conductor, which are made by welding. Monolithic reinforced concrete slabs of the building are used as a re-earthing and earthing lightning protection. Fire prevention measures Electrical equipment of the building in relation to explosion and fire safety is designed in accordance with the applicable rules and regulations. Electrical apparatus, lighting fittings in fire hazardous premises are selected in accordance with the class of fire safety of the premises. Outside the building, light indicators of fire hydrants are installed, which turn on automatically from the level of natural light.