Hotel building design - EOM

1 General provisions

This project is based on the engineering specification,

architectural and construction drawings and in accordance with the current regulatory documents.

The project solves the installation of electrical equipment of a typical individual residential building.

The necessary data for construction and installation works are given on

attached drawings and specifications.

Power supply diagram

External power supply is solved by a separate project.

According to Table 5.1 of SP 311102003

category of electric power supply reliability - III.

Mains voltage - 380/220V.

TNCS type grounding system, neutral mode - blind grounding.

The installed input capacity of the facility is 1 - 60 kW.

The installed input capacity of the facility is 2 - 60 kW.

Design input capacity 1 - 49.3 kVA.

Design input capacity 2 - 49.3 kVA.

Power factor - 0.98

Reactive power compensation - according to SP 311102003 is not required.

Inputs of the electric power in section it is made in introduction boards ShchV1 and ShchV2, for section 1 and section 2 respectively. Panels are installed on the elevation of each section.

For power distribution on consumers board ShchR1 in sections 1 and ShchR2 in section 2 established in the building is used.

Organization of electricity metering

In accordance with the customer's task, the energy consumption is not accounted for by this project.

Power Distribution

For power distribution between 1 and 2 floors the board in section 1 - ShchR-1 is used (in section 2 - ShchR-2). For power distribution between room consumers floor boards for section 1 - ShchRE-1.1, ShchRE1.2 are used (for section 2 ShchRE2.1, ShchRE2.2). Install hinged panels in the room with normal environmental conditions, accept the degree of protection of the shell IP31.

Cables with copper cores and insulation of reduced flammability of VBGngLS grade are accepted for laying of electrical networks. Three-core cables shall be used for single-phase electric receivers.

Electrical mains shall be laid as follows:

- hidden in voids of building structures under skin with degree of flammability G1;

- hidden in a rigid PVC pipe when passing through the floor floors, followed by closing the gaps between the cables and the pipe, pipe and opening with an easily removable mass of non-combustible material.

The wiring is protected against overload and short-circuit currents by circuit breakers. The network is checked against permissible long-term currents and permissible voltage losses.

The time of automatic power shutdown at short circuit currents corresponds to Table 1.7.1 of PUE.

Branches of cables to electrical installation articles and electrical equipment shall be made in branch boxes made of non-combustible material by the methods specified in GOST 1043482.

Cable connection and branch points shall not experience mechanical forces, cable cores shall have insulation equivalent to insulation of whole site cores and shall be accessible for inspection and repair. Grounding core shall not be broken in couplings boxes.

Socket network and electrical lighting

Plug sockets are used bipolar with a third protective contact and a protective device that automatically closes the socket sockets when the plug is removed.

In the premises san. install the socket assemblies at a distance of more than 600 mm from the bath edge.

The project provides for artificial lighting of the premises with lighting fixtures with incandescent lamps. The number and power consumption of the lamps are due to the design design in accordance with SNiP 230595 standards. In rooms with increased danger at installation height less than 2.5 m, lighting fixtures of protection class II are used.

All lighting fixtures are located in places accessible for maintenance and replacement of lamps.

The degree of protection of the element shells of the Electrical installation of the object meets the requirements of PUE.

Protective safety measures

To protect the electrical power lines of the building from surge peaks, which cause atmospheric discharges, electrical interference and interference in the network, install pulse surge limiters.

Circuits of plug sockets installed in rooms with increased and especially dangerous electric shock have protection by a protective shutdown device (RCD) with a set point for differential leakage current of 30 mA.

Rooms with special and increased danger of electric shock: porch, sun. nodes, sauna, balconies, kitchen-dining room;

In accordance with PUE, SP 311102003, GOST R 50571.294 and GOST R 50571.394, the TNCS grounding system is provided for the electrical installation.

As the grounding device (ZU) of the electrical installation of the building, the designed ZU is used, which provides resistance to current flow of not more than 30 ohms. The switchgear is made of horizontal (strip steel 40x4) and vertical (angular equal-beam steel 50x5) electrodes .

This storage device shall be used to provide the necessary protective measures of electrical safety and lightning protection of the building.

Parts of the electrical installation that are not normally energized, but which may be under it due to damage to the insulation of the network or electrical receivers, are subject to grounding.

Connect the parts of the electrical installation to be grounded to the protective grounding network with a separate branch of the PE core of the supply cable.

To protect against electric shock in case of insulation damage, the following indirect touching protection measures shall be applied:

automatic power-off;

potential equalization.

All installation equipment is certified by the State Standard of the Russian Federation.

In the building, the main potential equalization system is performed, connecting the following conductive parts to each other:

PEN - feeder conductor;

a ground conductor connected to the ground device;

metal pipes of utilities included in the building: water supply, sewerage and gas supply;

metal parts of the building frame;

external lightning protection system.

To connect to the main potential equalization system, all these parts must be connected to the main ground bus (GWB) using potential equalization conductors. Use the PE bus of the introductory shield as the GZSH.

As conductors of potential equalization, specially laid

conductors, as well as metal building structures that meet the requirements for conductivity and continuity of the electric circuit.

Installation of sauna equipment shall be performed in accordance with GOST R 50571.1296. Sauna heaters shall comply with the requirements of GOST R 50571. The sauna electrical equipment shall have a degree of protection not lower than IP54. The sauna shall be equipped with a temperature limiter which shall disconnect the electric heater from the mains if the temperature is higher than 140˚S. Connection of the sauna oven from the control panel is performed by heat-resistant wiring of the RCGM.

According to the requirements of PUE in the premises san. to perform additional system of potential equalization.