Configuration choices
- Panel function
- Incoming, outgoing and bus-coupling circuits.
- Construction
- Fixed or withdrawable construction, cable entry and maintenance access.
- Protection information
- Circuit protection, metering and operating interlocks.
Distribution role • Construction • Protection information
Low-Voltage Switchgear & Main Distribution Boards
Low-voltage switchgear distributes the main incoming supply to outgoing feeders and coordinates circuit protection, metering and operating controls.
Distribution roleIncoming, outgoing and bus-coupling circuits.
ConstructionFixed or withdrawable construction, cable entry and maintenance access.
Protection informationCircuit protection, metering and operating interlocks.
Project informationSingle-line diagram, feeder schedule and spare circuits.
Choose the arrangement below and add the details you have.
01 Technical data
Configuration & project information
Choose the arrangement below and add the details you have.
Information to provide
- Electrical requirements
- System voltage, frequency, current and short-circuit duty with duration.
- Project information
- Single-line diagram, feeder schedule and spare circuits.
- Installation
- Installation space, cable routes and environmental conditions. Include the consultant or network-operator requirements and actual outdoor temperature and enclosure conditions.
02 Application engineering
Applications
Industrial main distribution
A main distribution board (MDB) receives the transformer supply and feeds production lines, motor control centres and plant services. Busbar loading, prospective short-circuit current and coordination between incoming and outgoing protection determine the electrical arrangement. Feeder access and spare ways should support maintenance and planned expansion.
Main distribution boards for buildings
In offices, hotels and campuses, the main distribution board supplies risers, floor distribution boards and large mechanical loads. The load schedule defines feeder duties, metering and circuit allocation. Multiple supplies require a defined transfer and interlocking scheme; room dimensions, cable routes and maintenance clearances govern the physical layout.
Extensions to existing distribution
New process equipment or additional building loads can require extra feeders or replacement of a main board. Existing drawings, fault levels, busbar interfaces and cable sizes must be checked before designing the extension. Available space, isolation arrangements and the agreed shutdown sequence shape how the new section connects.
03 Select your configuration
Select your configuration
All fields are optional. Choose one or more options as indicated; use Other for a custom requirement.
Construction
Select one option.
Panel function
Select all that apply.
Installation
Select one option.
Project information
Select all that apply.
Additional requirements
Supply voltage requested
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Short-circuit duty (kA / s)
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Enclosure requirement
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Component preference
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Supply frequency
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Current requirement (A)
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Electrical values entered here are requested requirements. Equipment ratings must match the selected model and its technical datasheet.
04 Construction and options
Technical options
05 Applicable standards and requirements
Standards
- Project specification
- Technical references: IEC 61439-1 / IEC 61439-2. Confirm the applicable part and edition against the intended use and the proposed assembly documents. Installation reference: OES 4.
- Rating schedule
- Confirm model ratings and installation limits from manufacturer documents.
- Verification documents
- Request verification and inspection records for the exact configuration.
- Supply scope
- Specify equipment, components, engineering, software and documents separately; the quotation confirms included items.
06 Manufacturing & Projects
Manufacturing & Projects
Project Documents
Project Documents
Documents you can send
Send existing drawings or lists. You can start an inquiry without a complete document package.
- Single-line diagram
- Feeder schedule
- Tender specification
- Component and protection schedule
Documents to request
Ask for the following documents for the selected equipment. Document availability and delivery stage are agreed with the quotation.
- Supply scope and component schedule
- General arrangement and wiring diagrams
- Model datasheets and verification records
07 Decision support
Frequently asked questions
What information is needed for a quotation?
Send the following project information: System voltage, frequency, current and short-circuit duty with duration. Single-line diagram, feeder schedule and spare circuits.
How does a main switchboard differ from a distribution board?
A main switchboard handles the incoming supply and main feeders. A distribution board groups downstream circuits serving an area or specific loads.
Which short-circuit data should I provide?
State the prospective fault current, required withstand duration and protection arrangement. These requirements must be checked against the proposed model's documentation.
Let’s discuss your project
Request a quote
Send the following project information: System voltage, frequency, current and short-circuit duty with duration. Single-line diagram, feeder schedule and spare circuits. Installation space, cable routes and environmental conditions.
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