CRITERIA FOR SELECTING ELECTRICAL BOARD PANEL PRODUCTS

Today, I will introduce to you an important criterion for choosing the right electrical panel for your project. Surely you know that all electrical panel manufacturers in Vietnam know the IEC 61439-1 and IEC 61439-2 standards, but in fact, very few electrical panel manufacturers understand this set of standards. So what is this set of standards?

Today, I will introduce to you an important criterion for choosing the right electrical panel for your project. Surely you know that all electrical panel manufacturers in Vietnam know the IEC 61439-1 and IEC 61439-2 standards, but in fact, very few electrical panel manufacturers understand this set of standards. So what is this set of standards?

Overview of IEC 61439

IEC 61439 is an international electrical technical standard (IEC international standardization) of the International Electrotechnical Commission. Officially announced for application in January 2009, it is a standard applied to the electrical panel manufacturing industry worldwide. This standard replaces the IEC 60439 standard.

The IEC 61439 standard series provides for:

Durability of materials and equipment components such as: corrosion resistance, insulation properties, thermal stability, resistance of insulation materials at normal temperature, resistance of insulation materials under abnormal conditions and when burning due to internal effects of the equipment, resistance to ultraviolet rays, mechanical impact, lifting, manufacturing….

Degree of protection of the panel
Distance of live objects
Combination of switching devices and equipment enclosure components
Influence due to external assembly
Connection to external conductors
Voltage frequency
Surge
Limit of temperature rise in the panel cabinet
Short circuit withstand capability
Mechanical operation of the panel cabinet
Here is a brief introduction to this new standard, and a comparison between IEC 61439 and IEC 60439, to see the superiority and specificity of this new IEC 61439 standard.

Summary of the main changes of IEC 61439

IEC 60439

IEC 61439

IEC 60439-1

Type-tested and partially type-tested assemblies

IEC 61439-2

Design verified AssEMBLIEs

Mix of different rules and demands in each part

Clear structure:

IEC 61439-1 “General rules“

IEC 61439-2 … -6 “subsidiary parts” (product standard)

Each part is a complete entity and can be used on an individual basis

Each “subsidiary part” is based on the “general rules” (Part 1) and includes only the specific additional rules for the specific product

Testing each type of AssEMBLY:

Partially type-tested or type-tested

Three alternative methods for verification:

Test, calculation/measurement, design rules

Annex E:

Agreements between Customer and Manufacturer

Annex C:

Agreements between Customer and Manufacturer are more detailed and extended

Shared responsibility:

Original Manufacturer vs. AssEMBLY Manufacturer

Technical changes and clarifications:

Diversity factor, verification of temperature rise, mechanical characteristics, neutral conductor 50%, additional verification (from IEC 62208)

Only the manufacturers of electrical cabinets understand how this set of standards is specified and how much it can be applied to their products. Therefore, when choosing to buy electrical cabinets, you need to be careful and clearly understand how the manufacturer has applied and implemented this set of IEC 61439 standards to the product.