Portwest Automotive Magazine

CONTINUED

Layering arc flash garments results in higher ATPV protection. The Power Of Layering When two or more electric arc flash protective garments are worn in combination, a higher level of arc flash protection is achieved. When wearing layers, a layer of air with a naturally low electrical conductivity is trapped between each garment, this helps to increase the overall insulation and protection. The total Arc Thermal Protective Value (ATPV) of layered arc flash garments cannot be worked out by adding the ATPV of each garment, because of the additional layer of air, it may be higher than the sum of the ATPV of each garment. The following page details different combinations of our garments that we have tested to demonstrate their total ATPV protection when worn together. Additional Benefits of Layering Layering provides increased comfort and it also allows for the wearer to adjust their level of protection based on the task.

Causes of an Arc Flash

A phase-to-phase or phase-to-ground fault can occur due to: · Human error · Faulty materials · Accumulation of dirt and dust When this happens, the current flows instantaneously, raising the temperature high enough to vaporise anything at the fault site.

Outerwear Protection

Inner Protection

Skin

+ = MID LAYERS OUTER LAYERS Examples of layering

COMBINED PERFORMANCE

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ELIM: 9.2 cal/cm² ATPV: 15 cal/cm² FR12

ELIM: 8.6 cal/cm² ATPV: 9.8 cal/cm² FR50

ELIM 45 Cal/Cm 2

ATPV 47 Cal/Cm 2

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ELIM: 6.4 cal/cm² ATPV 6.8 cal/cm² MV28

ELIM: 4.4 cal/cm² EBT: 5.5 cal/cm² FR10

ELIM 19 Cal/Cm 2

ATPV 21 Cal/Cm 2

AUTOMOTIVE

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