Power supply project for administrative production building with 2 storey building. The project considered: air conditioning power supply system, protective grounding, power electrical equipment, main networks, ventilation power supply.

Sections EO, EM in dwg

The power supply of the administrative and production building is carried out from the TP-MSCh. In the technical underground of the building there are two input-distribution devices ASU No. 1 (in the auxiliary block) and ASU No. 2 (in a six-story building), from which the lighting panels are powered (see the section "Power electrical equipment").

To connect portable electrical receivers to the mains, sockets with a grounding contact are provided along the corridors, the installation height of the sockets is 0.3 m from the level of the finished floor.

The method of laying trunk and group networks - along the corridor and in the switchboard in perforated metal trays with a cover 100x50 and 300x50, behind a suspended ceiling in a flexible corrugated pipe d=32mm, in cabinets in cable channel 110x50.

Control boards supply and exhaust systems ventilation of the administrative and production building SHUV-0, SHUV-P1, SCHV-1, SCHV-2 are located on the basement floor, SHUV-V1, SHUV-V2, V3 are located in the attic, and SHUV-P2 on the 5th floor. Control panels for supply and exhaust ventilation systems of the SHUV-0 extension are located on the basement floor, and SHUV-P3, SHUV-V4, SCHV-1 are installed on the second floor. For supply and exhaust systems in the power supply project of the administrative building, remote monitoring and control of systems are provided using a push-button post and RUSM boards, which displays an alarm about the operation of the equipment. RUSMs for supply and exhaust systems are planned to be placed in the pom. 1.3 security rooms, and push-button posts remote control near installations.

The power supply project of the administrative building provides for the connection GZSH (Main Ground Bus) of the ASU cabinet with ground loop. To ground the equipment, make a loop protective earth resistance not more than 4 ohms.

An external ground loop is provided in the electrical panel room (an annex, administrative and production building) on ​​the basement floor, which is connected in two places to the designed external ground loop. It is also necessary to ground the storey switchboards by laying st. strips 40x4 1 m long along the wall at a height of 0.5 m from the finished floor. In the 2-storey extension of premises 2.56, 2.57, 2.49, in the administrative and production building on the 5th floor of the room. control room, to ground the premises by laying st. strips 40x4 along the wall at a height of 0.5 m from the finished floor.

The electric lighting of the premises is made from floor lighting panels located in the switchboard rooms on each floor. Shields are accepted by the IEK company.

The project provides for working lighting of all premises; emergency lighting of corridors, switchboards, floor switchboards, control rooms, laboratories, control rooms, emergency services, staircases; repair lighting of switchboard, storey switching units.

Illumination standards are adopted according to SNiP 23-05-2010, SanPiN 2.2.1 / 2.1.1.1278-03 and are indicated on the plans. The calculation of lighting was made using the computer program "DIAluX".

To illuminate the building, luminescent lamps from the Lighting Technologies company and lamps with incandescent lamps from the IEK company are provided. The project provides for the installation of "Exit" light indicators with LEDs, with the possibility of autonomous power supply from the battery. Connect the "Exit" signs to the emergency lighting corridor group.

Lighting networks are made with VVGng LS-0.66 cable hidden behind a false ceiling, VVGng cable laid openly in Efapel cable channels in rooms without false ceilings. Lowering the cables to the switches is carried out in the cable channels with the cable VVGng-2x1.5mm, VVGng-3x1.5mm. The top of the lighting boards should be provided at a level of 2.2 m from the floor, switches should be provided at a level of 1 m from the floor.

All networks are three-wire (phase, zero working, zero protective). All exposed conductive parts of the luminaires must be connected to the neutral protective conductor.

Power supply > The concept of power supply

Power supply of administrative buildings. Voltage and power supplies

The majority of administrative buildings in terms of reliability of power supply belong to the 2nd category. These buildings should, as a rule, be fed from different transformers of two-transformer substations, which are fed from different sections, 10 (6) kV.
In turn, the 10(6) kV switchgear must be fed by two cable lines and have an emergency switch on of the reserve. Power supply from a single-transformer substation should be considered as practically possible, but still undesirable, because in this case, in order to power critical consumers with a 2nd category of power supply reliability, cable jumpers are laid in emergency mode between the low voltage switchgear buses. In this case, the jumpers between the transformers must be designed so that the voltage loss to the most remote electrical receivers does not exceed the allowable for normal operation.
Lighting is powered by common transformers - for power and lighting consumers.
It should be noted that the normalized frequency of voltage changes in the network must be observed.
The supply of evacuation and emergency lighting must be independent of the supply of working lighting. With two inputs, power is supplied from different inputs, with one input - by independent lines from the input-distribution device (ASU).
The power of power transformers is taken on the basis of load calculation. At the same time, for approximate calculations of electrical loads, it is possible to use specific electrical loads, which for administrative buildings for each square meter usable area is 45 W - including air conditioning and 36 W - without air conditioning.
The locations of transformer substations should be established when designing a specific facility in accordance with the requirements and taking into account the location of the building on the general plan, the center of concentration of the main electrical loads, architectural and planning solutions, etc.
Transformer substations, as a rule, are built into the building or attached to it, less often - separately located. When embedding a transformer substation, in some cases, complete transformer substations with air-cooled transformers are used and placed in the basement.
Substations with oil transformers should be located on the first or basement floor, but above the level of the planning ground level.
Power transformers must be with dead-earthed neutral. The applied three-phase current system with grounded neutral is 380/220 V (no-load voltage of transformers is 400/230 V).
In administrative buildings, there is also a voltage of 12 and 36 V, used as a local voltage, for example, in ventilation chambers.
Power supply of emergency lighting of administrative buildings from autonomous sources (batteries, diesel power station) is usually not required.

Power schemes

The figure shows typical power supply schemes for lighting administrative buildings. The power supply circuit from a single-transformer substation at category III loads is shown in Figure "a". For category II lighting loads, it is recommended to use circuit "b", in which working and emergency lighting are powered by different transformers.
When each transformer is powered from independent sources (for example, from different sections of the 10 (6) kV switchgear, and even those with ATS), the circuit provides power supply to category I lighting loads.
Batteries as a second power source are rarely used and only when powering special loads, for example, for evacuation lighting.
From the switchboards of the transformer substations, supply networks are laid to the group lighting panels of the main switchboard, from which the group networks go.
Limited number protective devices on switchboards of substations or on the main switchboard of the building, as well as big values their rated currents cause in some cases the need to multiply the feeder switchboard through the main point, from which the group shields are already fed.
In the event of a power failure at the main source, it is possible to use circuits for automatically switching lighting from the main (working) power source to the backup (emergency) one.

Main circuit diagrams of emergency transfer stations

A partial selection of sheets from the power supply project is at the end of the project description.

This building project includes:- internal electric lighting; - Power equipment; (ventilation, technological equipment) The project of electrical equipment was developed on the basis of the following tasks: - architectural and construction drawings; - technical assignments of departments of OV, VK, etc.; - technical specifications of the Customer. The power supply of the building with office premises and parking is carried out from the city electrical network voltage 380/220V with deaf grounding of neutrals of power transformers through VRU1 and VRU2. Type of grounding system TN-C-S. In accordance with SP 31-110-2003, electrical receivers, in terms of the degree of reliability of power supply, belong to the II category; devices fire alarm, instrumentation, elevator and emergency lighting - to the I-th category.

The input-distributing devices are of the VRU-8504MU type and are installed in the switchboard room, located on the 1st floor. Devices for general electricity metering are located on the input-distributing devices, individual meters - in floor panels. the following types of lighting are provided: - working; - security and evacuation lighting; - repair. Exit signs are installed along the evacuation routes, exit signs are installed in the parking lot at a height of 500 and 2000 mm from the level of the finished floor. Illumination values ​​are taken in accordance with MGSN 2.06-99 and are indicated on the plans. Luminescent lamps are used in all rooms.

Electrical networks are made with a flame retardant cable with low smoke and gas emission with copper conductors of the VVGNG-LS brand. Distribution networks are laid along the technical underground on trays, behind the false ceiling of the 1st floor on trays, risers in specially equipped niches. Group lighting networks are laid: - for suspended ceilings on trays; - in rooms without false ceilings in PVC pipes laid in the preparation of the floor above the lying floor. Group networks of power electrical equipment are laid: - to sockets behind suspended ceilings on trays, drops in fireproof PVC pipes; - to electric motors - in fireproof PVC pipes laid in the preparation of the floor.

In accordance with the requirements of the PUE to shields are carried out by five-wire lines, group lines - by five-wire and three-wire.

To protect against damage electric shock UZO-VAD2 are installed on power boards on the lines to the sockets. For the protection of electrical networks adopted circuit breakers installed in VRU-8405MU distribution panels and group shields. Height of installation of electroadjusting products from a floor: - switches - 900 mm; - socket outlets- 900 mm (except for technological sockets, the installation height of which is indicated on the plans). The cross-sections of the wires of the electrical network are selected according to the permissible current loads with a test for voltage loss. All metal non-current-carrying parts of electrical equipment, shield frames, housings of starting devices and metal housings of lamps must be grounded by connecting to the neutral protective conductor of the mains. Grounding should be carried out in accordance with the PUE sec. 1.7 and 7.1. At the input to the building, a potential equalization system is provided, which connects the following conductive parts: - protective neutral conductor "PE"; - both ASU buildings; - metal pipes communications included in the building; - metal parts of the building frame; - metal sheaths of cables; - grounding device of the lightning protection system; - systems central heating and ventilation

Millions of our fellow citizens spend almost a third of their lives in offices. Office buildings now naturally adorn the landscapes of our cities. They are newly erected or located in old houses converted into offices. In both cases, the main task of specialists is to ensure the comfort and safety of people in their workplaces.

And one of critical factors for this, of course, is a reliable power supply.

The main feature of the administrative building is that at the peak of the load of the entire building, lighting networks also operate at full capacity. That is, in work time in our climate zone all electrical system the building is working almost at full load: the lights are on, computers and printers are buzzing, coffee is being prepared, lunch is heated in the microwave, trying to clean the air supply and exhaust ventilation, air conditioners try to create the most comfortable atmosphere for work, elevators scurry up and down, etc. etc.

Therefore, it is vital to take into account absolutely the entire electrical load of the building when calculating in projects, so that the network can withstand all this crazy mode of operation without any problems.

Office equipment can also be very diverse. These are separate offices of managers, and common large rooms, sometimes divided by partitions into separate work areas for employees.

AT large halls the installation locations of the socket blocks for connecting office equipment are determined based on the layout of the work areas, but not vice versa. This information should be known prior to the start of the design, as the designer will need to provide for the installation of sockets in hatches located in the floor, which will require elaboration of the placement of routes for additional trays and the laying of pipes for electrical wiring under the raised floor.

Luminaires for lighting the premises of office buildings are selected depending on the purpose of the premises, the category of visual work, operating and installation conditions, as well as taking into account the decor of the premises.

A design project is often ordered, but it must also be developed taking into account the above conditions. In the absence of a design project, the fixtures are selected and placed on the basis of a lighting calculation.

All this should be reflected in the Terms of Reference for the design of the power supply of an office (administrative) building.

If the Customer does not have the opportunity to independently draw up the Terms of Reference, our specialists will provide him with full assistance in solving this difficult task.

What do we offer:

1. Serious study and analysis of Connection Permissions and Terms of Reference in order to fully implement all the provided technical capabilities in the power supply project of an office (administrative) building.
2. Direct interaction with specialists developing design projects for the premises of an office (administrative) building. The maximum approximation of all design solutions to real conditions and their implementation in the power supply project (or, as some say, power supply) within the framework of existing regulatory documents, rules, Specifications and Connection Permits.
3. If necessary, the implementation of lighting calculations for the illumination of all premises of the office (administrative) building, and the further placement of lamps on the floor plans in the project based on these calculations.
4. The project of internal power supply of an office (administrative) building, completed by an experienced specialist, which includes:

Title page;

General information;

Schematic single-line diagrams of all ASUs, main switchboards and other necessary electrical panels;

Lighting network plans for each floor;

floor plans for emergency lighting;

Plans of socket networks indicating the scheme of additional equalization of potentials and the plan of placement of boxes of equalization of potentials (KUP) of each floor;

Plan of networks of computer sockets of each floor;

Plan of power networks of each floor;

Specification of materials and equipment used.

Under certain conditions and requirements, it is possible to develop a project in two stages: stage P and stage R.

1. The project of external (facade) lighting of an office (administrative) building.
2. The project of external power supply of an office (administrative) building (if necessary).
3. Design of the grounding system for an office (administrative) building (if necessary).
4. Ventilation and air conditioning project for an office (administrative) building (if necessary).
5. Project of low-voltage systems of an office (administrative) building (if necessary).
6. Coordination of projects in the relevant organizations.

Price list. Prices for the design of power supply of an administrative (office) building

Name of works

Unlike other electrical projects, the power supply project for an administrative building does not have a single development algorithm applicable to all design cases. The fact is that the requirements for the power supply network of administrative complexes can vary greatly depending on their architecture and functionality. So, if the building is located separately, it is necessary to include all the stages of the calculation of lightning protection and ground loops. In those cases when the design is carried out for a separate office section in a multi-storey new building, the main requirement may be strict compliance with the allocated limits for power consumption. In view of this, the development of electrical projects for administrative buildings requires professional knowledge of all methods of electrical design. In this review, we will consider the most significant features of projects in this category, as well as their impact on the final development cost. A distinctive feature of power supply schemes for office premises and buildings is a wide variation in their level of complexity. In some cases, a working electrical project of an administrative building consists of almost a dozen diagrams and an explanatory note of almost a hundred pages. And sometimes it's a little harder standard project for a three-room apartment. Recall that the preliminary assessment of the complexity of the project depends organizational chart its development (draft, working stages, techno-economic calculation, etc.), and, consequently, its cost. We list the factors that most affect the complexity of design. Type of allocation If the electrification of a separate building is being prepared, then the following specific sections will be added to the project: Calculation of lightning protection (taking into account the climatic features of the region); Calculation of the reinforced ground loop; In many cases, it is necessary to equip a separate site or room for the installation of a diesel generator backup power; Scheme of automatic input of a reserve (ATS); Plan of power supply lines (external input to transformers, power transmission lines from transformers to ASU); Calculation of power and critical operating modes of power transformers; Calculation of external lighting. It should be noted that such technical conditions (for a separate office building) are quite common in the practice of modern design. The most typical example is data processing centers (DPCs). food quality requirements This requirement can be called the main factor influencing overall complexity projects for administrative buildings. So, as a result of de-energization of the administrative building of some industrial enterprise, the most “terrible” thing that can happen is turning off the lighting in the showers and changing rooms. Obviously, it makes no sense to install additional equipment worth hundreds of thousands of rubles to prevent such consequences. But if you do not provide for backup power in the power supply scheme for the data center, then losses due to a break in the external power line will be in the millions. Requirements for the sanitary and hygienic characteristics of the object Another feature of projects for administrative complexes is the impossibility of ignoring the sanitary and hygienic requirements for office premises (in contrast to projects for a residential building, where similar SNiPs have little effect on the design complexity). Recall that almost every item from SNiP 31-05-2003 (“Public buildings for administrative purposes”) is the purpose of checking various kinds of inspections. With inevitable fines if violations are found. For the designer, this means: The need to develop a more powerful and more complex lighting network; The need to reserve power for connecting climate equipment; Development of an uninterruptible power supply system for connecting equipment responsible for fire safety. Note that this design feature is inherent in all types of electrical projects for administrative buildings. Power consumption limit This factor is worth mentioning because often office premises need to be connected to the power supply of a multi-storey building. Typically, this is accompanied strict restrictions for the total power consumption (up to the point that only 3 kW is allocated for one room). In view of what, the designer faces additional task: how to implement automatic control devices in the project, without increasing the risk of unplanned outages. In general, we can say that the key difference between power supply projects for administrative buildings and a typical "apartment" design is the need to develop uninterruptible power systems, as well as a complex of regular and emergency lighting. What is the category of reliability? Designing the power supply of a multi-storey office building most often covers all existing categories of reliability. To confirm what has been said, we present a table of subsystems from an example project for the administrative center of one of the major telephone network operators. Consumer reliability category Composition of electricity consumers Permissible power interruption I Information and computing systems Telecommunication systems Voice notification system and automatic telephone exchange Security and fire alarm systems Access control and management system Not allowed II fire pumps Air intake and smoke exhaust systems fire lifts Air conditioning system for technological premises Refrigerators signal lights Allowed for the time of switching on the backup power source III Other technological and engineering systems not included in categories I and II Allowed for the time of elimination of the accident From a design standpoint, reliability requirements determine the need for additional power inputs and the need to build external standby generators. Lighting as a determining factor The total power spent on powering the lighting networks of an administrative facility is a significant percentage of its total energy consumption. In addition, outdoor lighting of such buildings is often involved in creating an advertising image of the company, which directly affects energy costs. Based on this, we can conclude that economical luminaires can significantly reduce the cost of other subsystems through the use of a less powerful transformer and cheaper backup power devices. To correctly solve the problem of choosing between more expensive, but economical LED lighting and cheaper fluorescent lighting systems, we recommend performing a feasibility study before starting the design. Separately, we note that today there are more original opportunities to reduce lighting costs. In particular, when designing emergency lighting, fluorescent signs can be used, the power consumption of which is minimal. How to ensure the required quality of nutrition From the foregoing, we can conclude that the requirements for designing the power supply of an administrative building are largely determined by the requirements for the quality of power supply for subsystems of categories I and II. Recall that the maximum speed of switching to a backup source (up to 15 seconds for Category I) and the required duration of uninterrupted operation (up to several hours for Category II) can only be achieved as a result of the integrated use of battery and generator systems. It means that typical scheme power backup for an administrative building consists of several modules: battery-inverter complex; liquid fuel or gas generator (most often diesel); automatic switchover system. One of the main design challenges is to determine the exact characteristics for these systems. It must be said that this task is far from trivial and sometimes requires the construction of a sufficiently complex systems high reliability and with separate automatic control units. The most popular solution used both for production and for administrative buildings is the creation of parallel UPS with redundant reliability. That is, instead of one powerful UPS, a rack with several less expensive devices connected in parallel and operating in bypass mode is installed in the building. In the event of a critical situation, not all modules are activated, but only those that are necessary to power de-energized systems. At the end of the review, we note that the approval of the power supply project for office and administrative and amenity complexes requires confirmation by Rostekhnadzor and begins with the verification of the developer's license. Mega.ru accepts orders for the development of power supply systems for all types of administrative, residential and commercial buildings, including the design of highly reliable power supply networks for data centers and financial institutions. You can clarify the terms of cooperation and place an order for the development of the project by calling the numbers published in the section.