Name: Legrand Custom Engineered Panel
Brand: Legrand

Question 1

Which Legrand product families are typically used in Legrand Custom Engineered Panels and why?

Accepted Answer

Legrand Custom Engineered Panels commonly integrate XL³ enclosure systems for modular, type-tested busbar and enclosure architecture; DPX³ and DRX protection devices for upstream, mains and feeder switching; and Viking-style terminal blocks for dense and reliable wiring termination. XL³ provides robust bus supports and segregated compartments suited to Forms 2–4b arrangements under IEC 61439-1/-2. DPX³/DRX breakers comply with IEC 60947-2 performance requirements and offer frame-dependent breaking capacities suitable for coordinated protection schemes. Viking terminal blocks (or equivalent Legrand terminal solutions) simplify cross-connection and earthing and support compact control cubicles and metering wiring.

Question 2

What short-circuit breaking and panel withstand ratings can be achieved with DPX³ and DRX in an IEC 61439 assembly?

Accepted Answer

Breaking capacity depends on breaker frame and coordination; DPX³ and DRX frames are specified in manufacturer datasheets and can provide Icu values up to approximately 150 kA at 400–415 V for selected frames. Panel-level short-circuit withstand (Icw and Ipk) is validated per IEC 61439-1 short-time and peak withstand requirements: electrodynamic and thermal calculations plus type-testing where required. Final short-circuit ratings are project-specific, derived from busbar geometry, fault bus impedance, breaker characteristics (IEC 60947-2) and verification tests, and are documented in the type-test or calculation report.

Question 3

How are Forms of Separation (Form 1–4b) implemented in Legrand Custom Engineered Panels?

Accepted Answer

Forms of Separation per IEC 61439-1/-2 are implemented via physical segregation: Form 1 (no separation) to Form 4b (cable, busbar, and functional separation with draw-out device compartmentalization). Implementations use segregated busbar chambers, vertical and horizontal barriers, locked draw-out cubicles for breakers (with interlocks), insulated phase barriers, and dedicated cable troughs and control compartments. Design verification includes clearances, creeping distances, and verification by test or calculation to confirm compliance with the selected form and maintenance procedures.

Question 4

Can Legrand Custom Engineered Panels be certified for hazardous areas (ATEX) or marine environments?

Accepted Answer

Yes. Hazardous-area adaptations follow IEC 60079 series and are implemented using certified Ex components, purged enclosures, or intrinsically safe circuits as required; final certification is provided by notified bodies or classification societies as applicable. Marine and offshore panels reference IEC 60092 and class society rules (DNV, Lloyd’s, ABS) and can include marine-grade stainless steel, special coatings, and sealed glands for IP66. Environmental sealing (IEC 60529 IP20–IP66) and material selection are specified project-by-project to meet corrosivity, vibration and ingress requirements.

Question 5

What documentation and tests are supplied with a Legrand Custom Engineered Panel to meet IEC 61439?

Accepted Answer

Deliverables include type-test reports or calculation verification for rated operational current (In), rated insulation voltage (Ui), rated impulse withstand voltage (Uimp), short-time withstand (Icw) and peak withstand (Ipk), temperature-rise verification (test or calculation), routine continuity and functional test records, torque and wiring checklists, component datasheets (DPX³/DRX/XL³), and a final declaration of conformity to IEC 61439-1/-2. These documents enable electrical engineers and inspection authorities to confirm design compliance and safe operation.

Question 6

How do Legrand-based custom panels compare with SIVACON, MNS and Prisma SeT solutions?

Accepted Answer

Comparisons hinge on modularity, busbar capacity, and breaker ecosystems. Legrand XL³-based solutions emphasize modular enclosures and integrated DPX³/DRX breakers suited for medium-to-high duty commercial and industrial projects. Siemens SIVACON and MNS typically target very high-power industrial, factory and switchroom applications with heavy-duty busbar and draw-out breaker modules; Schneider Prisma SeT is optimized for building distribution and compact MDBs. Choice depends on required rated current (up to 4000 A achievable with XL³), short-circuit duty, draw-out needs and aftermarket service network.

Question 7

What ingress protection and materials options are available for outdoor or washdown installations?

Accepted Answer

Enclosures are available with IP ratings from IP20 to IP66 per IEC 60529. Options include painted carbon steel, AISI 304/316 stainless steel, gasketed doors, marine-grade hardware, washdown-friendly seals, and filtered ventilation. For aggressive or marine atmospheres additional surface treatments, sacrificial anodes, and stainless fasteners are specified. Cable entry systems, glands and exterior-mounted controls are selected to maintain the target IP rating under operational conditions.

Question 8

How should I specify a Legrand Custom Engineered Panel for a data center or hospital main distribution board?

Accepted Answer

Specify segregation level (Form 4b recommended for critical loads), redundant feeds (A/B topology) and automatic transfer switching as required; select DPX³/DRX frames for selective coordination, upstream discrimination and required Icu ratings. Include metering (class-rated energy meters), protection relays, remote communications (Modbus/IEC 61850) and localized HMI. Define environmental class (IP rating, fire/smoke requirements), cable access and containment, and provide full IEC 61439 documentation (In, Ui, Uimp, Icw/Ipk, temperature-rise). Early coordination with the panel builder ensures breaker curves, busbar sizing to 4000 A if needed, and testing protocols meet data center or hospital uptime SLAs.

Rated Current (InA)	Project-specific
Short-Circuit Rating	Project-specific
Rated Voltage	Up to 1000V AC
Form of Separation	Form 1–4b
IP Protection	IP20–IP66
IEC Standard	IEC 61439-1/2
Component Brand	Legrand

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