Electical supply design for Hotel
Our engineering company developed documentation Electical supply design for Hotel.
General Instructions power supply
Working documentation "Power Equipment" of the object located at the address: Moscow, was developed in accordance with the "Technical Task for development of working documentation" technological tasks, architectural - construction drawings, tasks of related departments, and decisions agreed upon with the Customer.
Working documents was performed in accordance with acting rules and regulations.
All equipment and materials foreseen by working drawings have certificates and technical approvals according to the law of Russian Federation "Certification of products and services".
The power supply of aboveground part of the Building 1 shall be executed from the built-in transformer substation (TS 1), located on the -1 floor level of the comple
Development of design documentation of high-voltage part of TS1 and selection of transformers is not included in the scope of this design documentation.
Double transformer substation 2х2000 kW, 20/0,4 kV.
0,4 kV distribution device (DD) of transformer substation as the main distribution board is to be used.
The main distribution board shall be located in the room adjacent to the premises of the respective transformers.
The power supply of the Object in general, according to the technical specifications (TS) for the connection, shall be performed on the basis of the first (I) reliability category.
According to the special specifications of the fire safety (STS) on the Object a special group ofcategory I power consumers , which requires a third, independent source of electricity, is dedicated.
To fulfill the requirements of ER&MS Version 4.0 the part of receivers also requires a power source independent from the city electric network.
As an independent source a diesel-generator unit (DGU) with a voltage of 20 kV, which is located outside the building 1 and 2 on the territory of Building in 13, shall be used.
In case of emergency shut down from the city's network both DGU transformers switch on automatically.
Development of transformer substations and diesel generator plant is not comprized in the scope of this design documentation.
For the period of start-up of DGU for the receivers sensitive to the sine wave rupture, UPS are foreseen.
The loads of fire protection, operating in case of fire, shall be powered by a separate panel (board) which also is powered by the main source and the DGU and which has a different color from the other panels (red).
Due to great distance from the main MDB for individual power consumers of the 1- st category of power supply reliability, if required, a local ATS shall be provided.
Radial-mainline principle of the electric power distribution along the object is used. Floor switchboards (FSB), incuding those of guaranteed power suppy, for further distribution of electric power supply along the building are foreseen. Place of installation - dedicated premise or niches. Floor switchboards feed the loads of this floor.
For each guest room installation of separate switchbord is foreseen. Electrical power equipment of the guest rooms is issued by a separate design documentation.
In each functional area (restaurants, SPA zone etc.) one must install separate distibutional switchboards located in service premises of these areas.
For power equipment , the set of which doesn't comprise the control cabinets, the boards of individual manufacture being developed by automation chapter are foreseen.
The height of the installation of control cabinets, outlets for the equipment connection, etc. shall be defined in accordance with the technology, ease of use and premise design.
Protection degree of the electrical equipment shall comply with the specification of the premise and the environmental conditions.
Automatic shut-off of the general ventilation systems in case of fire is organized in the automation chapter.
Calculation of electrical loads was performed in accordance with acting regulatory requirements and tasks of the relevant technological and engineering chapters.
To increase reliability of power supply and performance of the building indices, all power networks shall be interchangeable.
For vertical laying of electrtic networks along the building specilal shafts with niches on each floor are foreseen where power utilities and switchboards are located.
Power networks are to be performed by means of copper cores and bus bars with aluminum cores.
For power supply of aboveground buildings on -1st level the transit busbars and cable lines are coming through parameters of which are defined in relevant projects/design documentation.
For underground levels one must perform the cable lines of fire-fighting systems using fire-resistance cables with copper wires - FR, the others - by means of fire-proof cables not supporting combustion when the group laying, with reduced smoke emission not containing halogens in the combustion products - HF.
All cable networks are to be performed by means of cables with the pipes insulation color as per the Electrical Installation Code.
Cables laying way is shown on the drawings.
Places of the cables running through the walls and overlaps are to be performed in the pipes or closed steel boxes. All clearances are to be filled in with easy removable mass of non-combustible material.
Cable structures and perforated profiles are to be made of galvanized steel.
Project foresees a compensation of reactive power capacity for the Main Switchboard with installation of 0,4 kV automated packaged condenser units.
To measure electric power metering and control of the network parameters for the inputs of Main Distribution Boards and for separate functional areas the installation of electronic metering devices with transformer switch on of the current circuits; and in case of low currents - straight through metering devices with possibility to connect to automotized system of the data transfer.
As the safety precautions the following is foreseen:
- to power the object the TN-C-S system, PE and N conductors were separated starting from the Main Distribution Board;
- protective automatic cutoff of the electric receiver in case of overload and short circuit;
- protective automatic cutoff of electric receiver when damaging of isolation (differential protection);
- protective zeroing of the equipment casings by means of PE - conductors;
- equipotental bonding system of all electroconductive structures of the building, engineering services, lightning protection system etc. by means of their connection with main grounding busbar located in premise with Main Ditribution Board; as the main grounding busbar RE busbar of the Main Distribution Board is used.
- additional equipotental bonding systems - in technical premises and water closets.
Grounding and lightning protection are performed by the separate design document -WD-00-EZ1.
Energy saving of this object is determined by the following:
- application of automatic temperature regulation and keeping systems in the technological equipment control systems.
- optimal building structure of elecrtical power network.
The height of the sockets must be 300 mm. , except the height wich is showed in the drowing.
If the location of the electrical board at guest rooms( except standart room) will be changed, documentation will be updated accordingly.