Static Electricity Static Energy Static Charge Hazards & Control

 


Static Electricity Static Energy Static Charge

 Hazards & Control




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ELIMINATION OF WORKPLACE HAZARDS


Static Electricity Static Energy Static Charge Hazards & Control

 

One the unknown hazard present in the industry is, Static electricity is an electrical charge that cannot move. It is created when two objects or materials that have been in contact with each other are separated. When in contact, the surface electrical charges of the objects try to balance each other.

 

The key hazard of static electricity is the creation of sparks in an explosive or flammable atmosphere.

These sparks can set off an explosion or fire. The danger is greatest when flammable liquids are being poured or transferred. For static electricity to be a hazard, four conditions must be met:

 

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1. There must be a means for a static charge to develop

2. Enough energy must build up to cause ignition

3. There must be a discharge of this energy (a spark)

4. The spark must occur in an ignitable vapour or dust mixture

 

Static Electricity Static Energy Static Charge Hazards & Control

 

Control for Static Energy Static Charge Hazards

Many control is available for the same, Most static electricity control measures provide ways for the static charges to dissipate harmlessly

before sparks occur. Some ways to prevent static charges from accumulating on materials are:

.. bonding and grounding

.. humidification

.. static collectors

.. additives

 

Static Electricity Static Energy Static Charge Hazards & Control

 

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Bonding and grounding

It’s the key requirements. Bonding and grounding are common controls for static electricity. Bonding is connecting two or more conductive objects with a conductor, such as a copper wire, that equalizes the potential charge between them. Bonding is also connecting various parts of equipment and containers that are electrically separated by, for example, gaskets or caulking compounds. Note that bonding does not eliminate the static charge.

 

Grounding is connecting one or more conductive objects directly to the earth using ground rods, cold water copper pipes, or building steel. Unlike bonding, grounding drains the static charges away as quickly as they are produced.

A designated ground source is preferred. Connectors for bonding and grounding, such as

copper wire and clamps, must provide a good conductive path.

 


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