An arc flash/arc blast is a dangerous electrical plasma explosion created by a short circuit through air that causes electric current to flash over from one exposed conductor to another or to ground. An arc flash/arc blast is characterised by…
The main considerations of safe working procedures on electrical equipment are to ensure safety of workers and safety of the general public. In addition to this, the continuity of supply, and the welfare of plant is important. To be able…
A basic knowledge of the nature of fire is needed to assist in the understanding of how explosion-protection techniques make electrical equipment safe for use in hazardous areas. For an explosion or fire to occur three conditions must exist: there…
Many people are unaware of the combustible nature of dust and the issues that it can create. Many organic dusts are combustible such as: wheat flour sugar wood coal some metals & more The best way to determine the combustibility…
Coex Training is now in partnership with SynergenOG, an independent engineering consulting company headquartered in Kuala Lumpur, Malaysia. SynergenOG specialises in Process Safety, Technical Risk Management and Operational Safety services in a variety of industries including oil & gas,…
Power systems are effectively earthed by the neutral points being connected directly to earth. The only resistance being the inherent resistance of the connections and the earth itself. A system fault comprises either one or more phases being accidentally connected…
Under the Electrical Safety Act (QLD) the requirement is for all “new” Hazardous Area installations to have a Hazardous Area audit completed by an accredited Hazardous Area auditor and the installation found “compliant” prior to energisation. Details of audits (both…
Most high voltage distribution equipment has four basic ratings – service voltage; basic insulation level; rated current carrying capacity; and fault capacity. Service voltage The IEC sets standards for manufacturers to produce cables and switchgear for a preferred range of…
Substations, switchyards and switch rooms are hazardous areas but only become dangerous if procedures are not strictly followed. The safety of personnel is the paramount consideration in the operation of any power system. Substations are therefore designed to ensure that…
Hazardous Areas are present on many sites and are often overlooked, from our experience it has been noted that companies treat hazardous areas differently. Some examples; Do not know what hazardous areas are People equate Hazardous Areas to safety, asbestos…