LV Switchgear
LV switchgear is the factory-built assembly of circuit breakers, busbars and protection devices that distributes power at 400/415V, the standard low voltage level on Saudi projects. NLS Power sources LV switchgear built to IEC 61439-1/2 type tested designs, sized to the short circuit rating and form of separation the project's system study calls for.
LV switchgear is the panel room's main event: a floor-standing, factory-assembled enclosure holding an incoming section, a busbar system rated for continuous current, and a set of outgoing feeder ways protected by circuit breakers. It sits directly downstream of the transformer or generator and upstream of every distribution board in the building, which means its rating sets a ceiling that nothing feeding from it can exceed.
Two numbers drive the design more than any other. The busbar's continuous current rating has to cover the connected load plus a margin for future feeders, and the short circuit withstand rating (Icw) has to meet or beat the fault current calculated in the system study at that point in the network. Getting either number wrong either strands capacity on day one or leaves equipment that cannot survive a fault it was never rated for.
Form of separation, set out in IEC 61439-2, decides how much of the panel a technician can access while the rest stays live. Form 1 has no internal separation at all; Form 4b separates busbars, functional units and terminals from each other and from neighbouring units, letting a feeder be pulled and worked on without shutting down the busbar or the units either side of it. Saudi hospital, data centre and process-plant panel rooms typically specify Form 3b or 4 for exactly that reason: the board cannot go dark for maintenance on one circuit.
NLS Power sources LV switchgear from manufacturers building to IEC 61439-1/2, in fixed or withdrawable construction, with incoming air circuit breakers or moulded case breakers, IP42 to IP54 enclosure ratings depending on the room, and busbar and enclosure sizing matched to SEC's standard 400/415V three-phase-plus-neutral supply.
Quoting starts from the single line diagram, the short circuit level at the panel, the required form of separation, and the feeder schedule. NLS Power returns pricing in USD once those four inputs are confirmed, with delivery phased against the panel room's civil readiness rather than a single shipment that arrives before the room can receive it.
Specifications
- ✓Type tested to IEC 61439-1 (general rules) and IEC 61439-2 (power switchgear and controlgear assemblies)
- ✓Form of separation Form 1 through Form 4b per IEC 61439-2, selected against maintenance access requirements
- ✓Rated operational voltage matched to SEC 400/415V three-phase-plus-neutral low voltage supply
- ✓Busbar continuous current and short circuit withstand (Icw) sized from the project's system study
- ✓Enclosure protection IP42 to IP54 depending on installation environment
- ✓Fixed or withdrawable construction with incoming ACB or MCCB and MCCB outgoing feeders
Frequently Asked Questions
What's the difference between LV switchgear and a distribution board?+
LV switchgear sits upstream, right after the transformer or generator, carrying the full building or plant load on its busbars. Distribution boards sit downstream of it, splitting that load into smaller circuits for a floor, a process area or a group of final circuits.
Who supplies IEC 61439 type tested LV switchgear in Saudi Arabia?+
NLS Power sources LV switchgear from manufacturers building to IEC 61439-1/2, sized against the short circuit rating and form of separation a project's system study specifies, with delivery timed to the panel room's civil schedule.
What drives the cost of an LV switchgear panel?+
Busbar current rating, short circuit withstand, form of separation, and whether breakers are fixed or withdrawable are the main drivers, followed by the manufacturer brand and enclosure protection class. A Form 4b panel with a high fault rating costs meaningfully more than a Form 1 board of the same current rating.