Overview
LV assemblies are built to IEC 61439 with switching, protection and metering devices. The form of separation (Form 1 to Form 4) decides how safely each circuit can be maintained while the board is live.
Plants often need power factor correction and harmonic filtering for VFD loads. Boards should have spare space for expansion and energy monitoring linked to the BMS.
Uses
- 01Main LV board after the transformer
- 02Distribution boards for production areas and floors
- 03Power factor correction and harmonic filters
- 04Motor control centres (MCC)
Selection and acceptance checks
- Check IEC 61439 test reports
- Check protection coordination and breaker settings
- Insulation test and torque terminations before energising
Reference standards
- IEC 61439-1
- IEC 61439-2
- IEC 60947-2
For reference only. The standards for each project follow its design documents, current Vietnamese codes and the investor’s requirements.
Reference brands
- Schneider Electric Schneider ElectricFrench energy management and automation group: MV and LV switchgear, busway and electrical devices.
- ABB ABBSwiss-Swedish electrification and automation group: MV and LV switchgear and breakers.
- Siemens SiemensGerman technology group: MV and LV switchgear, busway, fire detection and building automation.
Brands are listed for reference; World Steel selects suppliers according to each project’s specification.
Sectors and solutions
Sectors
FDI factories Data centers Energy High-rise buildings
World Steel services
MEP general contracting EPC contracting Warranty and maintenance
