ProGARM Catalogue

PROTECTION IN LAYERS

LAYERED PROTECTION WITH PROGARM ® When arc flash and flame resistant garments are worn in layers, they provide the best “last line of defence against an arc flash incident.” Arc flash garments should not just be an outer protective layer, as wearing the wrong fabrics even under protective garments can result in injury in the event of an arc flash incident. That’s why ProGARM ® has developed a total range of garments to protect you a nd your team that are soft, breathable and comfortable. By layering garments, you can achieve enhanced protection values, higher than merely the sum of the protection values of the garments. This is because air is a poor conductor of heat. It acts as an insulator and so increases the total calorific value of the garment system. ARC RATED CATEGORIES An arc rated category number is a method to determine the required arc rating of a garment worn for a given work task. Some work tasks will demand wearing protective garments in multiple layers to reach the required level of arc protection, and this information should be provided by an employer as a result of an arc flash assessment. The NFPA identified four arc risk category levels, which are numbered by severity from 1 to 4 (1 being the lowest). The arc category is the level of arc flash protective clothing you must wear to protect against a minimum level of incident energy measured in calories/cm 2 .

This means that electrical equipment, depending upon the energy delivering capability, under fault conditions can cause an explosion, or arc fault of a certain level, again measured in calories/cm 2 . The resulting explosion is able to deliver an amount of heat to a certain distance.

Please note that references within this catalogue to ARC 1 to 4 relate to ELIM ratings. ATPV / EBT ratings are stated where an ELIM rating is not available.

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