Low-Voltage Electrical Switchboards
Custom manufacturing of low-voltage electrical switchboards and power distribution panels.
Shortlec designs and manufactures fully custom low-voltage electrical switchboards tailored to each industrial, commercial, or service project. We cover the full range: main and sub-distribution boards (MDB, SDB), control and protection panels, and lighting boards. We manage the entire process — from technical sizing through manufacturing to continuity, insulation, and functional testing before delivery — always with reference-brand components and full compliance with IEC 61439 and applicable Portuguese legislation.
What we build
Main and sub-distribution boards, control and protection panels, lighting boards, and custom switchboards for industrial installations.
Each board is sized to real project requirements, integrating the right gear: breakers, contactors, protection relays, network analyzers, and monitoring systems.
Compliance and quality
All boards comply with IEC 61439 and Portuguese legal requirements. Internal QA includes continuity, insulation, and functional testing before delivery.
We work with reference-brand components, ensuring traceability and long-term supportability.
Typical applications
Factories, commercial installations, office buildings, data centers, production plants, critical infrastructure, and retrofit or expansion projects.
How we build it
Inquiry and requirements analysis
We receive the specification or single-line diagram. We analyze the electrical architecture, short-circuit currents, space constraints, and the client's specific requirements.
Sizing
We size the equipment (protections, contactors, busbars) and validate the configuration with the client before moving to manufacturing.
Mechanical fabrication and wiring
Structure assembly, installation of protection and control components, sized and labelled wiring. Work executed per IEC 61439 by qualified technical staff.
Testing and verification
Each switchboard undergoes continuity, insulation, and functional testing. Visual and dimensional checks. We issue a test report and certificate of conformity.
Delivery and commissioning
Transport to the client's site. Support for commissioning and start-up when applicable. Complete technical documentation in editable format.
Need a custom switchboard?
Send us your project brief or specification. We reply with a technical proposal and quote promptly.
Get In TouchFrequently asked questions
Which standards do your low-voltage switchboards comply with?
Every board complies with IEC 61439 and applicable Portuguese legislation. We run continuity, insulation, and functional tests before delivery.
Do you build single custom units or only in batches?
Mostly custom — we size each board against the client's specification and integrate the exact gear and accessories for that project. We also handle small series when it makes sense.
What are typical lead times?
It depends on complexity and component availability, but typically 3–6 weeks after technical sign-off. We assess expedited paths for urgent cases.
Do you serve only Porto or all of Portugal?
We manufacture in Porto and deliver across mainland Portugal. Each switchboard is packaged for safe transport.
What types of electrical switchboards do you build?
We build every type of low-voltage electrical switchboard up to 6300 A.
How do you size a switchboard for our project?
We start from the single-line diagram and the project's electrical requirements. We validate short-circuit currents, protection coordination, and selectivity before manufacturing.
Do you run pre-delivery tests?
Yes. Every switchboard undergoes continuity, insulation, and functional testing per IEC 61439, plus visual and dimensional checks. We issue a test report for delivery to the client.
Related services
See the other areas where we support our clients.