Pollution Degree of Environment Conditions IEC 60947–1 (Climate Effect of the Electrical Panelboard)
Pollution degree
Pollution degree is a grouping as per how much dry Pollution and buildup are present in the climate. This grouping is significant since it influences creepage and clearance distances expected to guarantee the well-being of an electrical panel. Office and lab regions are viewed as Pollution degree 2 conditions as per wellbeing norms and confirmation bodies.
Pollution degree 1 might be viewed as inside fixed parts and inside air/water-tight nooks. Pollution degree 3 is a more brutal climate run-of-the-mill in numerous modern assembling regions.World standard institute guidelines bodies like Underwriters Laboratories (UL) and IEC
Pollution degree of environment conditions IEC 60947–1
"Conventional number based on the amount of conductive or hygroscopic dust, ionized gas or salt and on the relative humidity and its frequency of occurrence, resulting in hygroscopic absorption or condensation of moisture leading to a reduction in dielectric strength and/or surface resistivity".
Standard IEC 60947-1 distinguishes four pollution degrees:
Degree 1. No pollution or only dry, non-conductive pollution occurs.
Degree 2. Normally, only non-conductive pollution occurs. Occasionally, however, a temporary conductivity caused by condensation may be expected.
Degree 3. Conductive pollution occurs, or dry, non-conductive pollution occurs which becomes conductive due to condensation.
Degree 4. The pollution generates persistent conductivity caused, for instance, by conductive dust or by rain or snow.
Safety guidelines, like UL and IEC, determine proper distances between high voltage and wellbeing low voltage signals. These distances help to guarantee administrator security and are reliant upon ecological circumstances, (for example Pollution degree). Table 2 shows a correlation of the necessary distances among high and low voltage signals in a Pollution degree 1 and Pollution degree 2 climate.
You can download the copy of the Free ebook about pollution degrees & IEC standards from the link below, for more details visit blog electricalenclosure.blogspot.com
IS/IEC 60947-1 (2007): Low-voltage switchgear and controlgear, Part 1: General rules (resource.org)
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