The main function of the input distribution device is to receive and subsequently distribute the received electricity to individual consumers. These devices provide protection for machinery and equipment from short circuits and emergency overloads. Control devices installed in input distribution devices (IDUs) allow you to take into account the consumed electricity and monitor the correct distribution of loads in the network. Most often, ASUs are used in alternating current networks, at a voltage of 220-380 volts and a frequency of 50-60 Hz with solid grounding.
ASU – Input distribution device
ASU - input-accounting-distribution devices are designed to receive, meter and distribute electrical energy and protect lines during overloads and short circuits.
ASUs are used in industrial enterprises, data processing centers (DPCs), as well as in electrical installations of residential and public buildings.
ASUs are divided into: single-panel, multi-panel, cabinet.
The main purpose of the ASU is to supply buildings or individual parts of premises with electricity.
What is VRU
In principle, by its appearance it is difficult to distinguish the ASU from other boxes used in electrical applications. For example, the same distribution board is very similar to an ASU. Although, in fact, both devices perform almost the same functions. So. An ASU is a metal box or panel with a one-sided panel. This is the model most often used in housing stock. True, it is necessary to indicate that the number of panels can be unlimited, in addition, the devices themselves can be assembled into sections, which increases the ease of their operation, plus reduces the installation space.
Technical characteristics of the ASU
| Type of main circuits | with solidly grounded neutral |
| Rated voltage of main circuits | 220, 380 V (AC) |
| Rated voltage of control circuits | 24, 48, 110, 220, 380 V (DC or AC) |
| Rated voltage of additional auxiliary circuits | any, not higher than 380 V |
| Rated insulation voltage of main circuits | up to 1000 V |
| Maximum rated input current | up to 630 A |
| Maximum value of expected short-circuit current | up to 50 kA |
| Rated AC frequency | 50 Hz |
| Type of grounding system | TN-S, TN-C, TN-CS |
| Dimensions (for single shell): | height with plinth up to 2200 mm; width up to 1200 mm; depth up to 800 mm; |
| Type of supporting structure | frame made of prefabricated metal or welded structure |
| Structural layout | row, corner, cabinet |
| Internal sectioning (according to IEC439-1) | up to 3b |
| Type of external coverings | external elements – finely structured polyester (fine shagreen) powder enamel (default RAL 7035); internal elements: zinc coating. |
Characteristics of ASU panels
The devices reliably protect all devices connected to the electrical network. The range includes ASU panels for single-phase (220 V) and three-phase (380 V) power systems. All elements are protected from voltage surges, short circuits and leaks.
ABB-electroshield specialists will help you select an ASU panel and provide consultations on the specifics of choosing certain systems. To order equipment, just contact the managers, leaving your contact information to order a call back.
Working conditions of the ASU
| Height above sea level | up to 2000 m |
| Temperature range (standard) | from -5°С to +40°С |
| Relative humidity (at 25°C) | up to 85% |
| Type of external environment | non-explosive, the content of corrosive agents corresponds to atmosphere type II or III according to GOST 15150 |
| Safety and reliability | |
| Degree of protection of the cabinet outer shell (standard versions) | IP31, IP41, IP43, IP54 |
| Resistance to mechanical factors | M4 |
| Standard climate versions | UHL3 or T3 |
| Seismic resistance | up to 6 points (with installation height up to 20m.) |
| NKU service life | 30 years |
Prices for ASU
The price of an ASU depends not only on the number of machines and panels, but also on the complexity of assembly and the manufacturer of the automation. Below I want to provide you with several options for calculating the cost of an ASU; this is exactly the commercial offer you will receive from us by sending a request to our general email.
Please note that before taking a price from the Internet for an ASU, you first need to send it to us for calculation. We will give a clear price, price and quality guarantee.
| Object: ASU at 250a | Unit change | Qty |
| Introductory panel | PC. | 1 |
| Housing 2000x600x450mm | PC. | 1 |
| Side wall | PC. | 2 |
| Perforated panel | PC. | 1 |
| Switch-disconnector VR32I-35V71250 250A | PC. | 1 |
| Fuse holder DP-35 size 1 250A | PC. | 3 |
| Fuse insert PPNI-35 160A size 1 | PC. | 3 |
| Current transformer TTI-30 150/5A 5VA without busbar, accuracy class 0.5 | PC. | 6 |
| Test box | PC. | 1 |
| 230ART-03 RN 5-7.5A; 3*230/400V (c.t. 0.5S/1.0; RS-485; LCD) | PC. | 1 |
| Ammeter E47 150/5A 72x72 AC connection via a transformer (accuracy class 1.5) | PC. | 3 |
| Voltmeter 500V 72x72 AC direct connection E47 | PC. | 1 |
| Cam switch PKP10-44/O 10АUc-O-Ua-Ub4Р/ | PC. | 1 |
| Capacitor K-73-28-1-1000V-0.47uF | PC. | 3 |
| Single-pole automatic switch 6A C VA47-29 4.5kA | PC. | 1 |
| Fluorescent lamp LPO-6w electronic ballast with lamp G5 LPO2001 | PC. | 1 |
| Kit of mounting parts | PC. | 1 |
| Total including VAT: | from 30 000 | |
| Estimated production time | 2 days | |
| Object: ASU at 400a | Unit change | Qty |
| Introductory panel | PC. | 1 |
| Housing 2000x600x450mm | PC. | 1 |
| Side wall | PC. | 2 |
| Perforated panel | PC. | 1 |
| Switch-disconnector VR32I-37V71250 400A | PC. | 1 |
| Fuse holder DP-37 size 2 400A | PC. | 3 |
| Fuse insert PPNI-37 200A size 2 | PC. | 3 |
| Current transformer TTI-30 150/5A 5VA without busbar, accuracy class 0.5 | PC. | 6 |
| Test box | PC. | 1 |
| 230ART-03 RN 5-7.5A; 3*230/400V (c.t. 0.5S/1.0; RS-485; LCD) | PC. | 1 |
| Ammeter E47 150/5A 72x72 AC connection via a transformer (accuracy class 1.5) | PC. | 3 |
| Voltmeter 500V 72x72 AC direct connection E47 | PC. | 1 |
| Switch cam. PKP10-44/O 10АUc-O-Ua-Ub4Р/ | PC. | 1 |
| Capacitor K-73-28-1-1000V-0.47uF | PC. | 3 |
| Single-pole automatic switch 6A C VA47-29 4.5kA | PC. | 1 |
| Fluorescent lamp LPO-6w electronic ballast with lamp G5 LPO2001 | PC. | 1 |
| Kit of mounting parts | PC. | 1 |
| Total including VAT: | from 35 000 | |
| Estimated production time | 2 days | |
| Object: ASU at 630A | Unit change | Qty |
| Introductory panel | PC. | 1 |
| Housing 2000x600x450mm | PC. | 1 |
| Side wall | PC. | 2 |
| Perforated panel | PC. | 1 |
| Switch-disconnector VR32I-39B71250 630A | PC. | 1 |
| Fuse holder DP-39 size 3 630A | PC. | 3 |
| Fuse insert PPNI-39 315A size 3 | PC. | 3 |
| Current transformer TTI-40 300/5A 5VA without busbar, accuracy class 0.5 | PC. | 6 |
| Test box | PC. | 1 |
| 230ART-03 RN 5-7.5A; 3*230/400V (c.t. 0.5S/1.0; RS-485; LCD) | PC. | 1 |
| Ammeter E47 300/5A 72x72 AC connection via a transformer (accuracy class 1.5) | PC. | 3 |
| Voltmeter 500V 72x72 AC direct connection E47 | PC. | 1 |
| Cam switch PKP10-44/O 10АUc-O-Ua-Ub4Р/ | PC. | 1 |
| Capacitor K-73-28-1-1000V-0.47uF | PC. | 3 |
| Single-pole automatic switch 6A C VA47-29 4.5kA | PC. | 1 |
| Fluorescent lamp LPO-6w electronic ballast with lamp G5 LPO2001 | PC. | 1 |
| Kit of mounting parts | PC. | 1 |
| Total including VAT: | from 40 000 | |
| Estimated production time | 2 days | |
Order ASU
You can get the cost of the ASU in the following ways:
send an application with a completed questionnaire or a one-line diagram to us by mail
Contact us by phone: +7 (495) 225-99-15
109428, Moscow, Ryazansky prospect, 10с18, office. 6.3A. 143985, Moscow region, Balashikha, Savvino microdistrict, Promyshlennaya street, 49A.
Send a request and we will contact you Leave a request Request a call
ASU cabinets manufactured by ELSIN are installed at the entrance to the building and have a metal casing.
ASU production
Our production is located in Moscow. The customer can always come and see the assembly of the ordered ASU. You can also simply come to our production site and see the full assembly cycle of switchgear devices. The device production cycle consists of:
- Approval of schemes with the customer
- Selection of equipment and order completion
- Assembly of switchboard equipment
- Panel marking
- Testing on a test bench
- Delivery to the quality control department and packaging
Scope of products
ASU panels are used as independent electrical installations in office, retail, industrial and warehouse premises.
When distributing electricity in an industrial enterprise, equipment of this type is one of the main elements of the power supply system. In this case, the switching devices are electrically connected to automatic transfer switching devices (ATS), lighting panels and other electrical equipment.
The assembly of ASU cabinets is carried out at the enterprise in the assembly shop of the ELSIN company. A professional installation team installs switching and protection devices, automation and control equipment, wiring and connecting wires of switching devices.
The quality of installed products and the timing of installation work are under constant control.
Floor electrical panel (ESB)
Switchboards of this type belong to a lower hierarchy of distribution boards. The purpose of this device is determined by its name. Through the electrical switchboard, electricity is distributed to consumers located on a specific floor. And in the case of an administrative building, outgoing electrical wiring lines can provide power to individual offices or groups of them.
Everyone knows ESH.
In a residential apartment building, a floor electrical panel distributes electricity to apartments on one landing. In this case, it may contain meters for metering the electricity consumed by each apartment. If there are electricity meters in the switchboard, they can be located in a separate compartment, which, if necessary, can be sealed by representatives of regulatory authorities.
Panels of this type, unlike the previously considered types, necessarily contain automatic switches. Modern versions of electrical panels are produced in a modular version; the machines are installed in them on a DIN rail.
Main technical characteristics of ELSIN equipment
To ensure reliable operation and safe operation of electrical equipment, it is necessary to purchase an input distribution device with the appropriate characteristics. The main ones are the values of the rated voltage and rated current of the input device.
Additionally, by agreement with the customer, a supplier of switching equipment and measuring instruments is selected, and the degree of protection of the housing from external factors is determined.
All switchgears are equipped with a locking mechanism.
Indoor distribution board
It is located inside the apartment and serves to distribute electricity among rooms or groups of consumers, depending on the existing project. In some cases, the apartment switchboard may also contain an electricity meter. If there is a residual current device (RCD), it is also located in this panel.
Apartment panel with accounting device.
Advantages of working with ELSIN
The ELSIN company manufactures ASUs in Moscow, using modern high-quality materials in production. The set of accompanying documentation contains certificates, diagrams, passports for the installed equipment.
All manufactured equipment undergoes a detailed inspection by the Quality Control Department (technical control department). Strict quality control requirements guarantee the customer high reliability of the purchased equipment.
The products manufactured by the enterprise guarantee long-term reliable and safe operation.
Reactive power compensation units (RPC) are designed to improve the operation of equipment at industrial enterprises. Oscillatory processes occurring in the electromagnetic fields of electrical networks under the action of synchronous electric motors and generator power plants that produce electric current reduce the quality of the generated electricity.
Lighting board (SHB)
In ShchO the lighting load is distributed, this is relevant in office and administrative buildings. At such facilities, the electrical load is divided into the power part (socket groups, separate ventilation and air conditioning devices, etc.) and the lighting itself.
Example of a ShchO with a lock.
In conclusion, it is worth adding that the installation of electrical distribution panels at any power supply facility is carried out strictly in accordance with the electrical part of the construction project. The design documentation provides for the required number of control panels, their internal layout and installation locations.
Application area
The introduction of electrical equipment such as UKRM capacitor units compensates for reactive power. The equipment produced by the company works reliably in energy-intensive industries. This type of device is most widespread:
- at oil refining and gas industry enterprises;
- in steel and cement shops;
- woodworking industries;
- in mechanical engineering.
In addition, capacitor units are used in enterprises operating asynchronous motors, compressor and welding equipment, melting and electric arc furnaces.
and other manufacturers of capacitor units produce equipment that does not require operational control of its operation. The reactive power compensation process is fully automated.
Schematic electrical diagrams of distribution and lighting panels with comments
During pulse overloads, the arresters are triggered.
PEN - bus for connecting the neutral and protective conductor.
This is all the more important because when using fuses to save money and reduce the size of the ASU, switching devices are not installed in them, which is a serious drawback of such input-distribution devices. The cross-section of the jumpers must be no less than the cross-section of the protective PE wires. In this case, it is important to have ammeters in all three phases to record load asymmetry and take measures for its possible equalization.
This diagram indicates the types and characteristics of protective devices, as well as their installation in specific groups. It indicates the ratings of all circuit breakers and electrical cable cross-sections. The separation point is operated by the energy supplying organization and serves as the boundary of operational ownership of the networks of the energy supplying organization and housing maintenance offices. Next, the power is supplied to the electricity meter and then distributed among the groups.
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Conventional graphic symbols in electrical diagrams are not defined by any single document. In some cases, when it is advisable due to the conditions of load distribution at the inputs, it may be possible to supply the tenants' lighting installations from the power input, but the possibility of connecting them is checked by calculation. Installation of protection devices With a radial power supply circuit, the cable supplies one house PUE is allowed not to install protection devices at the input. In this case, it is important to have ammeters in all three phases to record load asymmetry and take measures for its possible equalization.
Installation of protection devices With a radial power supply circuit, the cable supplies one house PUE is allowed not to install protection devices at the input. The tires are mounted inside the ASU next to each other. As calculations show, in most cases the voltage drop when turning on elevators exceeds the permissible value according to GOST.
Input distribution device in a private house
The fundamental thing here is different. In this case, it is important to have ammeters in all three phases to record load asymmetry and take measures for its possible equalization. It does not provide for the installation of an energy meter. Bus N must be secured to the ASU body through dielectric non-conducting insulators. A characteristic feature of building an ASU circuit at home is the separate power supply of apartment loads and working lighting of common building premises from one input and power consumers from another.
The system is divided into nine consumer groups protected by automatic machines. To make it possible to replace the meter without removing the voltage from the ASU, a disconnecting device is installed in front of the meter on the ASU. How to connect a magnetic starter. Connection diagram.
Choosing a location for installing an ASU
For this purpose, special electrical switchboard rooms with limited access are equipped: only maintenance personnel can get there. If this installation method is not possible, then all distribution boards must be placed in cabinets with a degree of protection of at least IP31. In this case, a dry installation location must be selected (for example, a basement that is closed from outsiders).
It is important to exclude the possibility of flooding and fire on the panel. The panels are mounted on walls above the flood level; the walls separating the panel room or its alternative must have a fire resistance rating of at least 0.75 hours.
The location of the premises where the assembly and installation of ASU and main switchboards is carried out should not be under toilets and bathrooms, washing and steam rooms of buildings and structures, including baths. If this cannot be avoided, you need to consider and carry out waterproofing of the electrical panel to prevent moisture from entering it.
It is also not recommended to lay heating and water supply pipelines through these premises. If this condition cannot be met, it is necessary to exclude any branches from the pipes (except for cases when a radiator is installed in the electrical panel for heating), as well as the presence of flanges, hatches, valves, etc.
Pipes containing gas or flammable liquids are not allowed to pass through the room with the switchboard. Entrance doors to electrical rooms must open outward. It is necessary to maintain the temperature in these rooms at least +5°C.
Ease of maintenance of the switchboard is of great importance, so it is better to choose places where a specialist can work comfortably in the event of maintenance or repair work. If it is impossible to organize a separate electrical panel in the building, then for this purpose you can arrange a heated corridor, vestibule, vestibule, etc. Together with the ASU and main switchboard, low-current lines can be installed in these places (TV signal amplifiers, smoke removal systems, etc.)
How many ASUs are required for installation?
It is possible to determine purely devices and switchboards only on the principle of ensuring the reliability and quality of power supply. The structure of the building, connection diagrams, number of consumers, and total load are taken into account.
For residential buildings, the best place to mount the distribution board will be the middle section. If we are talking about a large structure (shopping center, public building), it is better to provide for the placement of the main switchboard at one main subscriber.
