Residential apartment, Moscow, 92 Vernadsky Ave., building 1 square meters. 272, sq. 273 - power supply and lighting
- Added: 09.07.2014
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1. GENERAL DATA
2. TABLE OF CONTENTS
3. DESIGN OBJECT CHARACTERISTICS
4. STRUCTURE AND PROJECTED LOADS OF POWER SUPPLY NETWORK
4.1 EQUIPMENT CHARACTERISTICS
5. TECHNICAL SOLUTION
5.1. POWER SUPPLY TO SOCKETS
5.2. LIGHTING POWER SUPPLY
5.3. METHOD OF ELECTRICAL GRIDS LAYING
5.4. PROTECTIVE EQUIPMENT
6. ORGANIZATION OF OPERATION
7. EQUIPMENT OPERATION
4. Power supply network structure and designed loads
According to TA, loads are divided into groups:
• loads of electrical equipment;
• outlet network.
When calculating loads, it is accepted:
• minimum power consumption per socket - 0.100 kW.
5. Technical solution
The power supply system is divided into socket power supply, power supply to process consumers, and lighting power supply. The common power supply and earthing system is TNCS.
In the introductory board, the potential equalization system shall be performed in accordance with PUE, chap. 1.7. by combining the following conductive parts:
- main (main) protective conductor (PE) of the supply line;
- metal pipes of utilities;
- metal grid of potential equalization;
- metal parts of the building structures.
All above mentioned parts are connected to the main grounding bus by radial circuit by means of conductors of potential equalization system made by copper wire according to PUE.
The lead panel bus PE is used as the main ground bus.
All electrical equipment used in the design shall have a quality certificate of the Russian Federation.
The conductors in the electrical panel are marked in accordance with PUE 1.1.29.
Input of power supply is made from ES to board ShchK1 and ShchK2 by means of introduction the VVGngLS cable (5x10), the counter of the electric power is installed in ES.
5.1. Power supply of sockets.
For input of power supply the project provides installation of introduction boards ShchK1 and ShchK2 from which there is a power distribution on power consumers and network of lighting. Board ShchK1 is established in clothes, and ShchK2 in the hall, according to plans (sheet 5).
The connection node to the 220B socket network is a 1-phase power socket with protective ground embedded in the wall.
5.2. Lighting power supply
Power supply of lighting is made from a switchboard of ShchK1 and ShchK2, via automatic switches 10 A. A switchboard installation site - according to plans.
5.3. Method of electrical grids laying
When laying power cables, refer to SNiP 3.05.0685 and PUE section 7.1.
Cable lines of the power network are laid in the wall stem, and in the space behind the suspended ceiling, in PVC pipe, in accordance with PUE Section 2, lay lighting networks in the wall stem and behind the suspended ceiling in PVC pipe Ø20 mm, in accordance with the requirements of PUE Section 2.1 and 7.1. Cables are laid in the basement in a metal box or in a metal pipe.
PVC pipe Ø20 mm and Ø25 mm (laying in the stem of the walls and behind the suspended ceiling) is used for cable wiring of the power network to the workrooms. Cables are laid in the basement in a metal box or in a metal pipe. Install sockets on walls in place, according to plans.
The final places of installation of sockets, routes for laying cable routes are specified in place during installation.
To ensure the safety of people, all metal buildings of electrical equipment and metal structures normally not energized must be reliably grounded in accordance with the requirements of PUE. The grounding devices shall be installed in accordance with the requirements of MV 10276. The resistance of the grounding device must be not more than 10 ohms.
5.4. Protective equipment
In the power supply system of the apartment, Legrand protective equipment is used. It includes RCD and circuit breakers. The project used equipment with disconnection capacity not lower than 6.0 kA.
6. Organization of operation
Upon completion of the works, it is necessary to draw up acts of examination of hidden works on cable and network laying and draw up a protocol for measuring insulation resistance of sections of the distribution power network and electric receivers.
7. Equipment operation
All equipment proposed for use in this project is certified and meets the standards of the Russian Federation, during operation in accordance with this project, does not pose a danger to people.
Safety of people during operation of the power supply system is ensured by:
inaccessibility for unintentional direct contact with current-carrying parts of electrical installations, which is achieved by the use of materials having proper insulation;
arrangement of components of the power supply system out of reach;
using reliable and fast-acting automatic disconnection of parts of electrical equipment that were accidentally energized and damaged sections of the network;
handling and grounding of electrical equipment enclosures and cable structures, which may be energized due to insulation damage. TNCS grounding system is used to protect personnel against electric shock.