luni, 17 februarie 2014

The Importance Of Arc Flash Analysis

By Krystal Branch


Arc flash analysis is required in all industries where high voltage tools are used in daily operations. It is aimed at reducing the possibility of fire hazards that result from the passage of high voltage current through the air. It causes an explosion that damages the equipment with temperatures that can be as high as 35000 F.

Extreme pressure and rapid heating leads to destruction of electric systems and equipment. All metal conductors that are along the path of this electric current are affected. Rapid expansion and fast moving heat wave are disastrous to workers and equipment along the path. Metal conductors along the path of the heat and electric current will melt. There is a high possibility of igniting fire which would destroy the premises.

High temperature and voltage can be fatal to any human being around the area. The extent of injuries is disastrous and has the potential to cause death. It takes a few seconds to cause an explosion which is so fast that a person has no chance to switch off the machine or take cover. The kind of blast that happens in such a situation can only be equated to several dynamite sticks. The electric system is bound to collapse and a huge fire will result.

Regulators of the electricity industry require detailed labeling of any environment that is exposed to flashes. Such labeling must indicate the potential so that people in the area can take necessary precautions. For such potential to be indicated, it must be preceded by thorough analysis. Boundaries of such danger should be marked clearly to warn anyone approaching the area. This raises their level of sensitivity and awareness of the possibility of a blast.

All industries or operations dealing with energized electric parts are required to provide personal protection equipment (PPE) to their personnel. Though the law prohibits working with energized tools, it is sometimes inevitable or might happen by mistake. Protecting the workers reduces the severity in case an accident happens. PPE are also selected after a thorough evaluation of the entire electric system.

If electric systems are not adequately maintained, they are vulnerable to explosions. The safety of a system is guaranteed from installation. Knowing the real potential of the system means you can take adequate precautions. Under protection exposes workers to risky currents and blasts. The analysis conducted helps you to grasp the strength and weakness of your system.

There is a way flash arc energy can be reduced in order to scale down the level of PPE required and minimize the possibility of damage. An adjustment may be made on the tripping device for the circuit breaker. The amount of energy during a fault will be reduced. This approach is likely to affect the coordination of the protective devices. This is a delicate and technical assignment that can only be done by specialists.

The report from arc flash analysis offers unique details for each system. It gives you a thorough understanding of your potential and possible weaknesses. You understand the dangers you are exposed to in order to take precaution.




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