Rush: Definition, Types, Installation, and Characteristics
1. Rush: Definition
Part of the installation of the distribution network, which feeds the box or general protective boxes or functional equivalent unit (hereinafter GPC).
1.2. Types of Rushes
Based on its design, system installation, and network features, the rush may be:
| TYPE | SYSTEM INSTALLATION |
|---|---|
| Air | Posada on facade |
| Stretched over pole | |
| Underground | With input and output |
| Shunt | |
| Mixed | Aero-Ground |
1.2.1. Inn Air Assault on Facade
Prior to its implementation, if possible, should be a prior study of the facades so that they are affected as little as possible for drivers who travel must be adequately protected and safeguarded.
In this type of rush, the cables will be installed at a distance from the wall and its attachment to it will be done through appropriate accessories.
The cable perched on the facade will be isolated type 0,6 / 1 kV and its installation should preferably be under protective ducting or channels with removable with the help of a handy.
The stages in which the connection is at a height above the ground less than 2.5 m shall be protected with rigid tubes or channels of the properties listed in the following table and take appropriate measures to prevent the storage of water in these tubes or channels of protection.
| Feature | Grade (channels) | Code (tubes) |
|---|---|---|
| Impact resistance | Strong (6 joules) | 4 |
| Minimum temperature of installation and service | -5 º C | 4 |
| Maximum temperature of installation and service | +60 º C | 1 |
| Electrical properties Electrical continuity / insulation | 1 / 2 | |
| Resistance to penetration by solid objects | Ø ? 1 mm | 4 |
| Resistance to corrosion (metal pipes) | Interior protection media, high foreign | 3 |
| Resistance to flame propagation | No propagator | 1 |
Compliance with these characteristics are verified by the tests in the UNE-EN 50086-2-1 for rigid conduit and UNE-EN 50085-1 for channels.
Crossings for roads and undeveloped areas and depending on the length of the span, the cables may be installed directly tied at both ends, by using the system to rush stretched, using a cable or guarantor, provided that the conditions of the ITC-BT-06.
These crossings will be made so that the span is as short as possible, and the minimum height on streets and highways shall in no case less than 6 m.
In buildings of historic or artistic interest or declared as such will seek to avoid such a rush.
1.2.2. Weatherhead Air Stretched on Poles
The wires are insulated type 0,6 / 1 kV and may be installed cable suspended from a guarantor, independent and adequately stretched or including through use of a neutral conductor with a suitable guarantor strength, and properly calculated for this function.
All supports shall be fitted with appropriate devices that allow carriers tightened with a suspension or mooring interchangeably.
The distances in height, proximity, crosses, and parallels met as indicated in the ITC-BT-06.
When the wires cross on public roads or areas of potential road traffic, the minimum height on streets and highways shall in no case less than 6 m
1.2.3. Weatherhead Ground
This type of installation, shall be implemented as described in the ITC-BT-07.
It takes into account the minimum clearances specified in the ITC-BT-07 at the intersections and parallels with other water mains, gas, telecommunication lines, and other electric conductors.
1.2.4. Weatherhead Airport Ground
Undertaken are those that take place partly in air facility and party underground facility.
The design and installation of the various installments of the attack was carried out according to their layout, along with paragraphs that correspond to this statement, taking into account the conditions of its installation.
In the transition from underground to aerial assaults, the cable will be protected from the depth established by ITC-BT-07 and to a minimum depth of 2.5 m above ground level, through a rigid conduit of the properties listed in 1.2.1., of this instruction.
1.3. Installation
In general, the rush was performed according to the shorter routes, making connections when they are needed through appropriate systems or devices. In any case, be conducted so that the insulation of the conductors is maintained until the connection elements of the CGP.
The rush will run for public lands except in cases of air or ground assaults, which have been authorized for rights of way.
Avoid the rush by conducting internal courtyards, garages, private gardens, private roads closed sets, etc. ..
In general, there will be a single assault by building or estate. However, they may establish independent rush additional supplies in Regulation for Low Voltage Electrotechnical or whose special characteristics (high power, etc.) so advise.
1.4. Characteristics of the Cables and Drivers
The insulated conductors or cables shall be copper or aluminum and the materials used and the installation conditions comply with the requirements established in the ITC-BT-06 and ITC-BT-07 for networking overhead or underground electric power distribution respectively.
As regards to sections for drivers and their number was calculated taking into account the following aspects:
- Maximum load specified in accordance with the ITC-BT-10.
- Supply voltage.
- Maximum allowable for the type of driver and installation conditions.
- The maximum allowable voltage drop. This voltage drop will be that the distribution company has established in its distribution of voltage drops in the components of the network so that the box or boxes of generic protection is within the limits set by the regulation of Electrical Checks and Regularity in the Power Supply.