Name: Siemens Lighting Distribution Board
Brand: Siemens

Question 1

What Siemens components are used in a Siemens Lighting Distribution Board and why are they chosen?

Accepted Answer

Siemens Lighting Distribution Boards commonly integrate SIVACON S8 type-tested busbar systems (for mains and sub-distribution), 3VA/3WA circuit-breakers for incoming and branch protection, SIRIUS contactors and 3RT starters for switched lighting groups, SENTRON PAC power meters and SENTRON measuring relays for monitoring, and Siemens Type 2 SPDs (IEC 61643-11 compliant) for surge protection. These products are chosen because they are IEC 60947-compatible, widely type-tested in 61439 assemblies, provide high breaking capacity options for selective coordination, and offer vendor consistency for spares and lifecycle support in buildings, hospitals, and industrial applications.

Question 2

How does the assembly meet IEC 61439 compliance and what documentation is provided?

Accepted Answer

Compliance is achieved through design verification (type tests or equivalent verification) in accordance with IEC 61439-1 and IEC 61439-3. Deliverables include type-test certificates for the enclosure and busbar (e.g., SIVACON S8 reports), routine test records (insulation, polarity, mechanical operation), thermal/temperature-rise calculations, short-circuit withstand verification, and a verification report showing compliance with rated current and degree of protection. Patrion provides panel drawings, Protection Coordination Studies, wiring schedules and factory test reports to satisfy EPC and authority requirements.

Question 3

What short-circuit ratings can I expect and how are they achieved with 3VA/3WA breakers?

Accepted Answer

Short-circuit withstand (prospective fault current) for lighting distribution boards depends on both enclosure type-test and chosen protective devices. Typical type-tested ratings for low-voltage lighting boards are 25 kA to 50 kA RMS symmetrical; with 3VA/3WL breakers and appropriate busbar segregation, certified ratings up to 100 kA are achievable in larger SIVACON assemblies. Final rating must be confirmed by manufacturer datasheets and the assembly’s type-test report; coordination with IEC 60947-2 characteristics and upstream protection is required to ensure cascade breaking and Icu/Ics criteria are met.

Question 4

How is emergency lighting segregation implemented in these panels?

Accepted Answer

Emergency lighting segregation is provided by dedicated outgoing circuits and a separate emergency bus or isolated RCBO-fed group(s), physically segregated in the enclosure per IEC 61439 separation forms. Space and termination provisions for battery/inverter feeds are included, with separate labelling, monitoring via SENTRON relays, and optional automatic transfer or priority switching by SIRIUS contactors. Design ensures emergency circuits remain functional under mains faults and that maintenance operations on non-emergency circuits do not compromise emergency supplies.

Question 5

Can the Siemens Lighting Distribution Board integrate DALI or KNX control systems?

Accepted Answer

Yes. Lighting distribution panels can be factory-equipped for DALI (IEC 62386) or KNX integration. Interfaces typically include DALI controllers, power supplies, bus termination points and DIN-rail mounted interface modules adjacent to SIRIUS control contactors. For KNX, certified interface modules and gateway devices are mounted and cabled to field panels. Integration is designed to maintain segregation between power and control wiring in accordance with IEC 61439 internal separation rules and to allow control wiring access during commissioning without exposing live power compartments.

Question 6

Which surge protection devices (SPD) are recommended and where should they be installed?

Accepted Answer

Type 2 SPDs compliant with IEC 61643-11 are standard for lighting distribution boards to protect downstream luminaires and control gear. Siemens or OEM DIN-rail Type 2 modules are typically installed at the consumer unit/feeder level (immediately downstream of the main incoming device) and can be backed up by Type 1 devices at service entrance where lightning exposure is high. SPD selection is based on system voltage (230/400 V AC), nominal discharge current (In) and coordination with upstream protection; mounting location must meet IP and thermal requirements specified in the SPD datasheet.

Question 7

What forms of internal separation and IP ratings are available for these lighting boards?

Accepted Answer

Panels can be supplied with internal segregation from Form 1 up to Form 4b, with Form 2 and Form 3 commonly used for lighting distribution to separate busbar, incoming and outgoing compartments for safe live working and selective coordination. IP31–IP42 are standard indoor offerings; higher IP65-rated versions or custom enclosures are available for harsh environments. Selection depends on maintenance philosophy, arc-flash mitigation requirements and site environmental conditions and is documented per IEC 61439 verification.

Question 8

What information should I include in a tender specification to procure a Siemens Lighting Distribution Board?

Accepted Answer

Include rated system voltage (230/400 V AC), panel rated current (e.g., up to 400 A), required outgoing ways (12–72), short-circuit prospective current requirement (Icw/Icu), required forms of separation, IP rating, integration needs (DALI/KNX, metering), SPD class (Type 2, IEC 61643-11), emergency lighting segregation, and approvals (IEC 61439-1/3 type-test evidence). Request specific product references (SIVACON S8, 3VA/3WA breakers, SIRIUS, SENTRON), coordination studies, factory test reports and FAT acceptance criteria to ensure delivery and compliance.

Rated Current (InA)	Up to 400A
Outgoing Ways	12–72 ways
Protection Type	MCB, RCBO, RCCB
Operating Voltage	230/400V AC
IP Protection	IP31–IP42
IEC Standard	IEC 61439-3
Component Brand	Siemens

Siemens Lighting Distribution Board

Key Features

Technical Specifications

Frequently Asked Questions

Request a Quote