The construction of any private house is unthinkable without a well thought out wiring and input scheme. Without exaggeration, we say that properly selected and assembled electric shield will eliminate a lot of everyday problems. You will only have to buy a box, well, there are bus wiring series PS and PSN, terminal block ABB MISTRAL65 and something else and collect everything together ...
Content
The need for an electrical shield in the house
For the device in the private house of the power supply system use special cabinets in the form of shields and blocks, here An important component of the component part of the electric power supply is an electrical distribution board that divides the power supply channel into several circuits.
The division of the electric power supply is necessary for the normal power supply of the connections to various automata. Exaggerated, the electric panel represents a set of system electrical switches involved in the circuit - the main input automaton, selective RCD and current breaker with surge protection.
Distribution electrical accounting and house boards are manufactured in an industrial way in the form of boxes and casings.
The need to install and install an electrical switchboard regulates the regulatory documents:
- GOST R 51778-2001 Shields for industrial and public buildings. General specifications
- Chapter 7.1. PUE-7. ELECTRICAL INSTALLATIONS OF RESIDENTIAL, PUBLIC, ADMINISTRATIVE AND HOUSEHOLD BUILDINGS.
Internal placement of electrical equipment is made according to existing layouts and layout rules.
Types and construction of electrical panels
Electric boards are divided by the installation method, the design can be built-in or external with an overhead or hinged installation.
Structurally the panels consist of the following elements:
- plastic or metal housing, which has an anticorrosion coating and powder-coated
- a protective panel with a double-sided door equipped with a transparent glass and a frame for fixing devices
- mounting DIN rails, wire holders and other accessories
- opening holes for the cable.
To select a shield for electrical plastic or metal, you need to be guided by the parameters:
- the purpose of the shield for connection to a single- or three-phase meter
- dimensions of the electrical panel, external and internal
- number of internal connection groups (modules)
- degree of dust and moisture protection.
For electric street boards it is recommended to choose a model with the possibility of installing a counter.
Designing a shield
Designing the assembly and installation of the electrical electrical hinged or built-in board is performed in accordance with the current regulations and rules in the logical sequence of the arrangement of devices.
The preliminary stage of the installation of electrical panels is a well-grounded scheme, in which the exact number of RCDs and automata is determined.
Then select and implement the layout scheme by size and number of modules. The layout of the shields is based on the modular construction principle.
Secrets of the installation of electrical devices in the shield are shown in the video.
Helpful Tips
When composing the layout scheme, it is necessary to take into account the width of one module. For reference: the width of the single-pole switch is 18 mm (1 module), the width of the two-pole circuit-breaker is 2 modules, the width of the single-phase RCD is 3 modules, the three-phase - 5 modules, the electricity meter depending on the model of 6-8 modules. Thus, to assemble an electrical board in the house, the minimum number of modules will be 12. Let's say that the number of modules of the electrical panel can be 48 modules
Now you can proceed to the layout of the layout.
Layout of the layout of modular devices
There are several schemes of internal arrangement of modular devices.
scheme "in a row by group"
The scheme is based on the principle of separation of electrical elements into groups.
The first element of the layout is the load break switch, which at the nominal value is duplicated by the input automaton. The purpose of the circuit-breaker is to de-energize the shield during emergency situations and routine maintenance or repair. Disconnect both wires connected to the shield (phase / zero).
Reinforcement brackets are placed from top to bottom.
Next in the layout are protective circuit breakers of the consumer - boiler and heater, washing machine and air conditioning.
Then it is recommended to place groups of sockets and lighting.
Devices of each group are placed on separate racks in descending order of denomination (from left to right).
A label of the appropriate designation is affixed to the rail. RCD devices are placed first and isolated separately.
Example
For example, according to the circuit layout of the board for a single-phase meter, RCDs and circuit breakers for 12 modules and the space for wiring 1.5 modules, it is planned to use an overhead or hinged shield with internal dimensions of 285x297 mm, an external dimension of 352x367 mm, a door assembly of 250 mm, a width of 89 mm and a depth of 78 mm.
Helpful Tips
We will suggest that the electrical panels have a design with or without doors. Shields hinged electrical tools are necessarily equipped with fastening elements on the body, designed to be placed on the vertical surfaces of the houses.
Shields for niches should have framing elements and fasteners covering the edges of the niches. In addition, in the industrial production boards without a disconnect device, there must be clamping elements of the supply chain connection at the input.
For example, for outdoor mounted installation, taking into account the layout for a three-phase meter and switches of 4 groups of 48 modules, a street vandal-proof billboard of YaR-3A-4 Standart is recommended in a hermetically sealed metal case with dimensions 400x445x150 mm with a two-door.
What the assembled electric shield looks like is shown here.
Loading ...