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Arc Protective Clothing Knowledge

2015-09-16 09:33 | writer: admin

1. Standard Performance Specification for F1506 ASTM textile materials:
In view of the flame retardant textile materials used in the clothing of the electric power workers exposed to instantaneous electric arc and other heat hazard, F1506 ASTM has developed a performance specification. The relevant requirements for F1506 ASTM protection include vertical burning method (new material after washing) and arc level set.
In addition, the standard requirements of the fabric is not easy to be ignited or ignited after the fire can be contained and self extinguishing. Flame retardant properties were tested by FTM 5903.1 vertical combustion method (2 seconds after exposure to 15 seconds in the flame. Arc level was determined by F1959 ASTM test with ATPV or EBT value.
2. Standard Specification for F1891 ASTM anti arc flame retardant raincoat:
This standard applies to the waterproof material of a raincoat, you can use the flame retardant coating or laminated fabric to produce clothing. Its flame retardant property was determined by D-6413 ASTM vertical combustion method, and the ATPV value was also recorded. The F1959 ASTM arc thermal performance test method was used to determine the 5 time and the minimum EBT value was recorded. In order to be more suitable for coating fabric, the standard is being revised to increase the burning test method of the fabric.
3. Standard for electrical safety requirements in 70E NFPA work environment:
The latest version of the 70E NFPA standard for the National Fire Protection Association of the United States in 2004 included the safety of the various aspects of the industry's working environment with the rules of electricity. 70E NFPA suggested that the ASTM, F1891 and F2178 should be used in the case of arc, and the performance standards of F1506 ASTM, ASTM and were achieved. In order to protect the employees in the arc safety limits, the standard set by using the corresponding risk risk classification of ATPV value of the protective clothing to protect employees. The unit of ATPV value is cal/cm2, which represents the arc thermal protection value, which is used to reflect the maximum protective performance of electric arc protective material, especially electric arc protective clothing.
70E NFPA is working in the vicinity of the charging equipment to set the safety standards, specifications and design the necessary steps to prevent serious damage caused by the electric arc. In accordance with the provisions of the 70E NFPA, each of the arc safety limits (within this range of release energy greater than 1.2 cal/cm2) within the staff must be able to be competent and wear appropriate flame retardant anti arc suit. NFPA divided the risk classification into 0~4 level to show the different risk level. The minimum risk level is the energy of the arc blast that suffers from the 4cal/cm2, and that is the risk classification of 70E NFPA. In order to get full protection of the electric arc, the staff must wear a NFPA certified ATPV value of not less than 4 of the thermal protective clothing.
Another important factor in the arc shield is the HAF level set, which represents the thermal decay coefficient, which represents the size of the fabric to block the heat.

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