ATPV 140 CAL/cm2 fall into category HRC 4 arc flash protection. Medium voltages with extremely high energy levels.
The ATPV 140 CAL suit offers greater ballistic protection from projectile and shrapnel. When Arc flashes occur at higher energy levels, light and heat energy can be accompanied by fragments of the conductor which become airborne. These fragments travel at great speeds and can cause great harm to the electrician.
ATPV values the higher the value, the more insulated one is from second degree burn.
HAF Heat Attenuation Factor. The higher the HAF%, the more the heat is blocked by the fabric.
Electricians working on distribution boards in substations and switchboards with medium voltage applications are at risk from arc flash occurrences. Higher voltages have the necessary potential to jump across phases, when these do occur the arc flash can be just as severe and harmful a higher voltages when the conditions allow.
To provide adequate protection, the electrician should be protected from head to toe. The ATPV 140 CAL headkit has a tinted visor that protects from thermal effects, conductor shrapnel and blinding light generated from the arc. ATPV 90 CAL Jackets and trousers are available in only two piece. ATPV 140 CAL Gloves are designed to provide maximum dexterity so that the electricians work is not inhibited. 35000v boots provide the insulation for live work conditions and a bag holds all the equipment together.