Page 446 - techequipmentscatalogue2016
P. 446
Arc Flash Protection
the solution for complete electric arc protection
The IIArc Flash ll phenomenon.
An electric arc follows ashort circuit. It produces nearly instant effects with serious
consequences without proper protection.
- The arc's main manifestation is its thermal effect. The heat energy released,
which is proportional to the voltage, intenSity,and fault length,can be considerable
(19.000°C), melting the metal and charring the insulation.
- Blast effect, caused by the very rapid release of energy in a limited volume of air
(similar to an explosion).
- Ught effect with high ultraviolet and infrared radiation.
- Ionisation effect that can trigger an arc on nearby active sections.
When electric arc danger exists, heat-resistant clothing mustbe worn.
The arc's characteristics are given by:
• The resistance value ofthe free arc, expressed in caVcnf according to NFPA 70 E,
ASTM standards, and IEC 61482-1-1.
or
• The protection class (1 or 2) with a constrained arc according to IEC 61482-1-2.
The following are used to determine the proper equipment for protecting against an Rre-retardant clothing in case of
exposure to an electric arc,confirming
electric arc: .0 lEe 61482-2 and the regulation NFPA 7OE.
• The maximum fault current value.
• The phase/ground rated voltage at the site of the risk.
• The distance between the source of the arc and the reception surface.
• The AC cycle number and the mono or three-phase circuit type.
• The location where the arc is produced (confined space).
After recording these parameters, we can estimate the level of risk and determine
the proper protective clothing and PPE to use:12 to 100 caVcrW or class 1 or 2.
For more information,please contact our technical department.
o £tiDimensions Weight
mm
440 www.tech-equipments.comlsales@tech-equipments.com
the solution for complete electric arc protection
The IIArc Flash ll phenomenon.
An electric arc follows ashort circuit. It produces nearly instant effects with serious
consequences without proper protection.
- The arc's main manifestation is its thermal effect. The heat energy released,
which is proportional to the voltage, intenSity,and fault length,can be considerable
(19.000°C), melting the metal and charring the insulation.
- Blast effect, caused by the very rapid release of energy in a limited volume of air
(similar to an explosion).
- Ught effect with high ultraviolet and infrared radiation.
- Ionisation effect that can trigger an arc on nearby active sections.
When electric arc danger exists, heat-resistant clothing mustbe worn.
The arc's characteristics are given by:
• The resistance value ofthe free arc, expressed in caVcnf according to NFPA 70 E,
ASTM standards, and IEC 61482-1-1.
or
• The protection class (1 or 2) with a constrained arc according to IEC 61482-1-2.
The following are used to determine the proper equipment for protecting against an Rre-retardant clothing in case of
exposure to an electric arc,confirming
electric arc: .0 lEe 61482-2 and the regulation NFPA 7OE.
• The maximum fault current value.
• The phase/ground rated voltage at the site of the risk.
• The distance between the source of the arc and the reception surface.
• The AC cycle number and the mono or three-phase circuit type.
• The location where the arc is produced (confined space).
After recording these parameters, we can estimate the level of risk and determine
the proper protective clothing and PPE to use:12 to 100 caVcrW or class 1 or 2.
For more information,please contact our technical department.
o £tiDimensions Weight
mm
440 www.tech-equipments.comlsales@tech-equipments.com
