Name: LS Electric Custom Engineered Panel
Brand: LS Electric

Question 1

What LS Electric breaker families are used in custom IEC 61439 panels and what are their IEC ratings?

Accepted Answer

LS Electric commonly supplies the Susol and Metasol moulded-case circuit breakers for custom IEC 61439 panels. These families cover frame ratings from roughly 16 A up to 2500 A with thermal-magnetic and electronic trip options. Their design aligns with IEC 60947-2 requirements for overload, short-circuit breaking, and coordination. Typical short-circuit breaking capacities (Icu) are engineered in projects from 10 kA to 100 kA depending on frame size, trip unit option, and busbar design. Selection of a specific Metasol/Susol model should be confirmed against the panel’s verified short-circuit calculations per IEC 61439-1/-2.

Question 2

How do you achieve Form 4b separation using LS Electric components in a custom panel?

Accepted Answer

Form 4b (separate functional units and separate compartments for busbars and incoming feeders) is achieved by compartmentalised cubicle design per IEC 61439-1/-2. Using LS Electric MCCBs and MC contactors mounted on isolated subpanels, busbars are enclosed in a dedicated bus compartment and outgoing feeders in separate, partitioned functional units with interlocks and IP-rated barriers. All penetrations are sealed per IP requirements, and earthing/clearance dimensions are verified by design calculation. Routine checks and visual inspection during type verification confirm compliance with Form 4b segregation.

Question 3

Can LS iS7 drives be integrated into IEC 61439 switchboards and what EMC/harmonic standards apply?

Accepted Answer

Yes. The LS iS7 variable frequency drives are commonly integrated into IEC 61439 motor control cubicles and distribution boards. Drive installation must meet EMC and harmonic requirements per IEC 61800-3 (emissions and immunity) and the switchboard designer should specify EMC filters, cable segregation, and screening. When multiple drives are installed, harmonic studies may be required and mitigation (filters, multi-pulse rectifiers, or active front ends) should be designed to meet network distortion limits and upstream protection coordination.

Question 4

What short-circuit ratings (SCCR) can be achieved with LS Electric-based custom panels?

Accepted Answer

Short-circuit ratings depend on the selected Metasol/Susol breakers, busbar cross-sections, and enclosure mechanical strength. Practically, LS Electric-based custom panels can be engineered for SCCR/Icw values from 10 kA up to 100 kA or more with reinforced busbars and suitable breaker frames. Verification testing and calculations are performed to IEC 61439-1/-2 to demonstrate peak withstand, making sure the chosen MCCB has the declared Icu per IEC 60947-2 and the assembly verifies internal arc and short-time withstand as required.

Question 5

Are LS Electric custom panels available for ATEX or marine environments and which standards apply?

Accepted Answer

Yes. Panels can be supplied with ATEX/IECEx hazardous-area construction referencing IEC 60079 series and with marine-grade builds referencing IEC 60092 and class society rules (DNV, ABS). Measures include flameproof or increased-safety enclosures, IP66 sealing, corrosion-resistant coatings, cable glands with appropriate Ex approvals, and grounding/ bonding practices required by the listed standards. Certification by notified bodies or classification societies is provided per project requirements.

Question 6

How is coordination performed between LS Metasol breakers and downstream protective devices in custom MCCs?

Accepted Answer

Protective coordination follows IEC 60947 and IEC 61439 verification methods: time-current curves (TCCs) are used to set electronic trip units and thermal-magnetic characteristics to achieve selective tripping. Selectivity and discrimination studies include short-time withstand, instantaneous settings, and upstream fuse/breaker characteristics. Coordination studies are supplied as part of the panel’s verification package and validated with relay/metering settings, ensuring motor protection and selective isolation in accordance with plant requirements.

Question 7

What factory and on-site testing is performed for LS Electric IEC 61439 custom engineered panels?

Accepted Answer

Factory testing includes type verification evidence, routine tests (continuity, insulation resistance, mechanical operation, and functional checks), temperature-rise tests where applicable, and short-circuit withstand calculations or tests per IEC 61439-1/-2. On-site commissioning includes insulation/resistance checks, torque verification, functional testing with connected loads, and witness testing for any marine/ATEX certificates. Test reports and certificates are provided to comply with client and regulatory requirements.

Question 8

How do LS Electric MC contactors perform in IEC 61439 motor control sections and which standard covers them?

Accepted Answer

LS Electric MC contactors are designed to IEC 60947-4-1 for contactor and motor starter performance (making/breaking, durability, auxiliary contacts). In IEC 61439 motor control sections they provide reliable switching, can be combined with thermal or electronic overload relays, and support modular assemblies for Form 2/3 segregation. Contactors are selected for rated operational currents and duty cycle, and their coordination with MCCBs and protection relays is validated during the design verification process.

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	LS Electric

LS Electric Custom Engineered Panel

Key Features

Technical Specifications

Frequently Asked Questions

Request a Quote