Search results
Results from the WOW.Com Content Network
Intrinsic safety (IS) is a protection technique for safe operation of electrical equipment in hazardous areas by limiting the energy, electrical and thermal, available for ignition. In signal and control circuits that can operate with low currents and voltages, the intrinsic safety approach simplifies circuits and reduces installation cost over ...
When equipment must be placed in a hazardous location, it can be designed to reduce the risk of fire or explosion. Intrinsic safety designs equipment to operate using minimal energy, insufficient to cause ignition. Explosion-proofing designs equipment to contain ignition hazards, prevent entry of hazardous substances, and, contain any fire or ...
Inherent safety has been recognised as a desirable principle by a number of national authorities, including the US Nuclear Regulatory Commission [10] and the UK Health and Safety Executive (HSE). In assessing COMAH (Control of Major Accident Hazards Regulations) sites the HSE states “Major accident hazards should be avoided or reduced at ...
Avoidance makes it impossible for an explosion or deflagration to occur, for instance by means of suppressing the heat and the pressure needed for an explosion using an aluminum mesh structure such as eXess, by means of consistent displacement of the O 2 necessary for an explosion or deflagration to take place, by means of padding gas (f. i. CO 2 or N 2), or, by means of keeping the ...
Intrinsic safety is a vital requirement especially by the worldwide process industries which demand an easy to implement solution to control and power field instruments in explosion hazardous areas. For this reason, optional intrinsic safety is fully integrated into the definitions of the Ethernet-APL communication standard.
In recent years, standards for explosion hazard protection have become more uniform between European and North American practice. The "zone" system of classification is now used in modified form in U.S. National Electrical Code and in the Canadian Electrical Code. Intrinsic safety apparatus is now approved for use in North American applications.
For premium support please call: 800-290-4726 more ways to reach us
The ATEX Directive has also adopted a functional safety standard, it is BS EN 50495:2010 "Safety Devices Required for the Safe Functioning of Equipment with Respect to Explosion Risks" covers safety related devices such as purge controllers and Ex e motor circuit breakers. It is applied by notified bodies under the ATEX Directive. The standard ...