Design of electrical power equipment for administration complex with underground parking
Power supply of the building Power supply of the building is 380 V / 220 V from the two external substations 10/0.4 kV with power 2х1600 kVA. Maximum capacity of connected power receiving facility is 3600 kW (TU to join "I-11-00-910359/102"). The project is a utility power is separate specialized organization.
Design of electrical power equipment for administration complex with underground parking
LEGEND
1. Here is the design of electrical power equipment for administration complex with underground parking.
2. The design is issued basing upon:
- Performance specification of Client;
- Permission for connection to electrical source;
- Documentation of engineering design;
- Task of technology department;
- Task of construction department;
- Task of mechanical department;
- Сorrespondance with acting norms (PUE, SP-31-2003, etc.).
3. Power supply of the building Power supply of the building is 380 V / 220 V from the two external substations 10/0.4 kV with power 2х1600 kVA. Maximum capacity of connected power receiving facility is 3600 kW (TU to join "I-11-00-910359/102"). The project is a utility power is separate specialized organization.
4. MDB “1ГРЩ” and “2ГРЩ” are designed to receive and distribute electrical power. Each MDB consists of 3 sections providing supply from 2 independent lines from 2 substations 10/0.4 kV and one supply line to the third section of the MDB of the generator of the owner. There is a tie switch between sections to provide reliable power supply. There are voltage arrestors on each supply line to protect electrical and electronic equipment from damage.
5. Supply voltage is 380/220V; transformer neutral is connected with the ground; power supply system is TN-C-S. Power supply system from MDB is TN-S by 3- or 5-core cables and bus bars.
6. PE-buses of “1ГРЩ” and “2ГРЩ” are used as main grounding buses of electrical installations. The following parts should be also connected with main grounding buses:
- cable trays and steel conduits outgoing from main-distribution panel boards,
- PE-conductors outgoing from main-distribution panel boards,
- grounding conductors.
7. All main grounding buses should be connected with potential equalizing conductors.
8. Power factor must be corrected to the value 0.95 using capacitor batteries installed in MDB rooms. Batteries should be controlled stepwise.
9. MDBs (1ГРЩ and 2ГРЩ) are installed at -1 floor. MDB is equipped with the 3-rd section of guaranteed power supply РПГ-Вл. In case of city power source failure supply is performed from emergency diesel generator of the landlord with capacity of 1600 kVA via 3-rd section of MDB.
10. In order to supply the consumers without power interrupt (fire and burglar alarm systems, dispatch system, BMS, landlord's IT equipment) there are local UPS in dispatcher room or equipment with built-in accumulators is used.
11. According to the requirements of СП 6.13130.2009 each fire zone is equipped with a separate sub-distribution panel board for fire-fighting equipment (smoke exhaust, overpressure, etc.) - which is installed in electrical room within fire zone. These panel boards are equipped with tie switch. In order to provide high reliability one incoming line is connected to 3-rd section of the panel board РПГ-Вл.
12. In order to connect tenants to diesel-generator "ДГУ-А” in future, there must be installed the distribution panel board (РП-Г.А) in electrical room of the -2 floor, together with 3ВРУ and 4ВРУ.
panel boards
13. There are the following sub-distribution panel boards:
- 1ВРУ and 2ВРУ - for consumers of underground parking;
- 3ВРУ, 4ВРУ, 5ВРУ - there are three distribution panel boards for above-ground building part. 3ВРУ and 4 ВРУ are used for power supply of tenant zones (illumination and power supply) and landlord zones (illumination and power supply), ventilation of above-ground floors, access control and security equipment of underground floors, external and façade illumination, and administration zone and lobby of the first floor. 3ВРУ and 4 ВРУ are installed in separate electrical room at the -2 floor. 5ВРУ is used for supply of tenant consumers (installed at the tenant's territory);
- 6ВРУ - for consumers of Heating Center.
Power supply of important consumers at over-ground floors is provided from the 3-rd sections of 1ВРУ, 2ВРУ и 3ВРУ, equipped with tie-switches, connected to 3-rd section of panel board РПГ-Вл.
Power supply of fire fighting from pump station is provided as for first special category of reliability via 3-rd section 0f MDB “2ГРЩ”.
14. Construction of tenant areas of the administration complex is performed basing upon "shell and core" basis.
Tenant areas are disposed at 1-15 floors. It is supposed to have 1-6 tenants at each floor, basing upon architecture plans.
There are 4 vertical bus bars (3P-1 и 3P-2 - from 1 to 8 floor; 4P-1 and 4P-2- from 9 to 15 floor). For distribution of electrical energy to tenants; connection is performed via circuit breakers on each floor as a part of bus bar. These bus bars can provide individually all tenant loads.
Tenant power supply is performed via two lines from 2 bus bars (3P-1 and 3P-2 or 4P-1 and 4P-2) to their own small power panel boards “ЩОС” (normal lighting, home sockets, kitchen equipment, tenant fancoils) and ЩК (computers, emergency illumination of tenants), installed at tenant areas. Supplying OJC and OR lines are redundant for each other. It is recommended for tenants to install 2 tie switches at their territory as shown in the diagram “Tenants' power supply”. Boxes with Wh-meters for tenants should be installed in floor electrical room. Installation place is pointed in this design.
In case there are more than 1 tenant on the floor 2 distribution panel boards should be installed in floor electrical room:. 3(4)ЩР-1-X -for connection to vertical bus bars 3P-1 and 4P-1, and 3(4)ЩР-2-X - for connection to vertical bus bars 3P-2 and 4P-2, where X - floor number.
15. In order to connect tenants to diesel-generator "ДГУ-А” in future, there must be installed the distribution panel board (РП-Г.А)with tie switch in electrical room of the -2 floor, together with 3ВРУ and 4ВРУ with a possibility for bus bars 3P-2 и 4P-2 to be connected to diesel generator ДГУ-А installed in future.
16. Tenant electrical loads are taken as required by the Client - 70 W/m2, in particular 30 W/m2 - normal illumination, domestic sockets, power equipment of kitchen, fancoils; 40 W/m2 - computers, emergency illumination. Maximal tenant loads are shown in the diagram “Tenant power supply”.
17. Design, installation and responsibility boundaries between landlord and tenants are shown in the diagram “Tenant power supply”.
18. There must be also installed two illumination panels in floor electrical rooms:
3ЩО-О-(1-:-15) - normal illumination of landlord common areas;
3ЩАО-О-(1-:-15) - emergency illumination of landlord common areas.
19. Motor control centers are installed as usual in the rooms where the mechanical equipment is installed.
20. For centralized automatic shutdown in case of fire general ventilation of the building, air curtains and air-conditioning system indoor units, chillers, dry coolers are used circuit breakers with independent releases in the appropriate outgoing lines VRU, as well as a direct trip from MCC. Disconnection is initialized from fire alarm system.
21. MCC of supply ventilation, drain pumps, elevators are supplied together with equipment. MCC of exhaust and fire fighting ventilation are standard of the type “ЯУ 5000”.
22. Hinged panels should be installed in accordance with plans at the height 1500-1700 mm from floor level.
23. Degree of protection of switchboard outside the premises shall be at least IP31, except for an underground car park. An underground car park belongs to the fire-zone class "P-I". Degree of protection of switchboards installed in the area of P-I, shall be at least IP44.
24. Electrical equipment should be manufactured by “ABB”, bus bars by “EAE”, cables of the type VVGng-LS/FRLS.
25. PVC conduits and ducts are certified for fire safety in accordance with NPB-246.
26. Electronic Wh-meters with accuracy 0.5% and having interface RS-485 are used for electrical energy registration. Current transformers with accuracy 0.5S are chosen in accordance with Part 1.5 PUE and connected load.
27. Electrical rooms b2-11b (3VRU, 4VRU) partially falls under the area with wet process b1-52 and b1-53. There should be special events for reliable sealing arrangement of electrical control room, according to the PUE (7.1.29).
28. Each electrical room is disposed in its own fire and functional zone, that excludes additional transit cable lines via other fire zones.
29. Transit supplying and distribution cable lines from 1ГРЩ, 2 ГРЩ and landlord's diesel generator to consumers laid through parking areas (-2 and -1 floors) should be laid protected with fire resistant materials (resistance no less than EI150), for instance “Promat”. Redundant cables should be laid in separate cable trays or in the same tray divided by partition, different conduits and different pull boxes, as required by PUE, SP31-110-2003 for reliable power supply.
30. In order to supply fire-fighting equipment installed on the roof a separate shaft with fire resistance no less than EI150 is provided. There is also a separate shaft for cables of mechanical equipment installed on the roof.
31. Cables should be laid under slabs and above suspended ceilings in cable trays; in vertical shafts in cable trays and flexible conduits; concealed in walls and partitions in rigid PE conduits; in cement lining skin in rigid PE conduits.
32. The bus bar from tenant's diesel generator installed in future to panel board РП-Г.А must be laid along -2 floor to electrical room on -2 floor and protected by fire resistance constructions fire resistant no less than EI150.
33. Power supply of smoke exhaust, life support control panels, emergency illumination, fire and burglar alarm systems and other fire fighting consumers is provided with fire resistant cables ВВГнг-FRLS. ВВГнг-LS cables with copper cores in non-propagating fire coating are used for distribution and small power networks for other consumers.
34. Electrical installation works should be performed after installation of vent ducts and sanitary equipment.
35. Installation works should be performed in accordance with notes in the drawings, PUE and acting norm SNiP 3.05.07-85.
36. PE and PEN-conductors should be correspondingly marked and colored yellow / green. Neutral conductors should be marked “N” and colored blue.