Main Distribution Board (MDB)

The Main Distribution Board (MDB) is the primary electrical distribution assembly and the central element of the power supply system in any facility, whether a residential building, industrial plant, or commercial property. It receives electrical power from an external source, such as a transformer substation, and distributes it to all electrical loads throughout the installation. The MDB is designed for low-voltage electrical systems operating on a three-phase AC network with a rated voltage of 380/220 V and a frequency of 50 Hz.

Types of Systems

Depending on the application and the complexity of the facility, these systems may be classified as:

1. Modular Distribution Board (Distribution Enclosure) — designed for apartments, holiday homes, and garages. It features a compact design, low weight, and straightforward installation, making it ideal for smaller electrical systems with limited functionality.

1. Main Distribution Board Cabinet (MDB Cabinet) — intended for industrial and commercial facilities, large private homes, retail stores, and office buildings. It offers expanded functionality, supports the installation of additional electrical devices, is available in various sizes, and provides a higher degree of protection.

The modular block design of the Main Distribution Board (MDB) provides exceptional flexibility, allowing switchboards to be assembled in virtually any configuration. This approach makes it possible to select only the functional modules required for a specific project, optimizing the internal layout of the cabinet while ensuring convenient access for maintenance and future expansion.

 

Functions of the Main Distribution Board (MDB)

Main switchboards perform the following essential functions:

1. Power reception and distribution — receive electrical power from a transformer substation or generator and distribute it to lighting, socket circuits, and power equipment.
2. Electrical protection — equipped with circuit breakers that disconnect the power supply in the event of overloads or short circuits, protecting both wiring and electrical equipment.
3. Energy metering — when required, the assembled MDB can be fitted with electricity meters for accurate energy consumption monitoring.
4. Control and monitoring — supports devices for monitoring voltage, current, and power, while enabling the control of individual consumer groups.
5. Electrical safety — ensures the insulation of live parts and protects personnel against electric shock.
6. Reactive power compensation — improves the power factor and reduces energy losses within the electrical system.
7. Power system automation — enables automatic control, optimized energy consumption, and enhanced reliability of the electrical installation.

As a result, installing an MDB improves the reliability and safety of the electrical power supply, extends the service life of electrical wiring and equipment, reduces energy costs, and provides convenient control and management of the electrical system.

What Is Included in the Package?

The assembled Main switchboards can be configured with a wide range of components to meet the specific requirements of each facility.

As the manufacturer, we begin every project with a detailed analysis of your technical requirements, followed by the design of a customized Main Distribution Board. Manufacturing starts only after all specifications and configurations have been fully approved.

Main components:

• Main Low-Voltage Switchboard (MLVS) — receives electrical power and distributes it across individual sections of the system.
• Circuit breakers — protect electrical wiring and equipment against overloads and short circuits.
• Residual Current Devices (RCDs) — protect people from electric shock in the event of insulation failure.
• Voltage protection relays — disconnect the power supply when voltage exceeds or falls below permissible limits.
• Contactors — control high-power electrical circuits.
• Additional control and protection devices — configured according to the specific requirements of the electrical installation.

Before you purchase main switchboards, it is essential to ensure that it is fully designed to meet the operational requirements of the facility where it will be installed.

Nika Energy is one of Ukraine's leading manufacturers of low-voltage electrical systems, producing custom-engineered solutions from the ground up in accordance with your technical specifications. As a direct manufacturer, we offer high-quality products at a more competitive price without compromising performance or reliability.

Purchasing a Main Distribution Board (MDB) Directly from the Manufacturer

Our manufacturing facility produces a wide range of distribution boards for Kyiv and other cities across Ukraine. We provide automation panel design as well as control panel design, developing customized solutions that meet our clients' technical requirements and ensure maximum system efficiency.

The manufacturing process takes the following factors into account:

• Facility power rating — the total electrical load and installed capacity.
• Number of electrical loads — the quantity and type of connected consumers.
• Safety requirements — compliance with applicable electrical and safety standards.
• Operating conditions — environmental factors, installation location, and service conditions.
• Project budget — selecting the most cost-effective solution without compromising reliability.
• Additional technical requirements — including future expansion, automation, metering, and other project-specific considerations.

In addition to offering a more competitive price and higher product quality, we provide comprehensive technical support. This means you can always rely on our specialists for expert advice on the selection, operation, maintenance, and repair of your electrical systems.