LV main and sub-switchboards
The main switchboard is where your building or plant receives its low-voltage supply and distributes it to every downstream board. We build main switchboards (MSB) and sub-switchboards (SSB) to your single-line diagram, load schedule and consultant's specification.
Typical applications
- Factories and process plants
- Commercial buildings, offices and malls
- Hospitals, schools and public buildings
- Infrastructure and utility supply points
Engineering and customisation options
- Incoming air circuit breaker (ACB) or moulded case circuit breaker (MCCB)
- Digital power meters, protection relays and indication
- Outgoing feeder arrangement to suit your load schedule
- Top or bottom cable entry
- Floor-standing layouts sized for your switch room
- Powder-coat colour to your specification
- Indoor or weatherproof designs to suit the installation site
- A choice of forms of separation (Form segregation ratings) to your specification
Standards and certification
ASTA type certificates for 2000A, 3200A and 4000A assemblies to IEC 61439-2, and approved on the JKR EMAL list, Kategori III.
Lead time, warranty and brands
- Typical lead time
- 4 to 8 weeks, depending on complexity
- Warranty
- 1 year on new switchboards
- Breaker and meter brands
- Schneider Electric, LS Electric, ABB, Terasaki, Chint, Himel, Shihlin
- Factory acceptance test
- You are welcome to witness it, or to visit our factory
How it is built and tested
- Design and drawings. We review your single-line diagram and specification, then issue general arrangement and wiring drawings for approval.
- Sheet metal fabrication. Enclosures are laser-cut, sheared and bent in-house, so we control dimensions and lead time.
- Powder coating. Enclosures are powder coated in our own spray booth for a durable, even finish.
- Assembly and wiring. Busbars, breakers, metering and control wiring are assembled to the approved drawings.
- Testing and inspection. Boards are inspected and tested before they leave the factory, then commissioned on site.
What to send for a quotation
- Single-line diagram (SLD) or schematic
- Load schedule or list of outgoing circuits
- Specification or consultant's requirements
- Site location and installation conditions (indoor or outdoor)
- Quantity and required delivery date
- Preferred brands for breakers, meters and relays, if any
Other products
Send us your drawings for a quotation
Share your single-line diagram, specification or bill of quantities. We reply with a price and lead time within 5 working days, and small jobs are welcome.