What is the difference between Ex e and Ex d?

Asked By: Nayely Inman | Last Updated: 23rd May, 2020
Category: home and garden indoor environmental quality
4.2/5 (105 Views . 13 Votes)
Ex d or “Flameproof” means that an enclosure or junction box is constructed and certified as Explosion Protected according to the “Flameproof” standard. Ex e, on the other hand, means that the enclosure is constructed and certified as “Explosion Protected” according to the “Increased Safety” standard.

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Herein, what is the difference between Ex ia and Ex ib?

The difference is performance under fault conditions: Ex ia systems are safe even with 2 faults; Ex ib systems are safe with 1 fault; Ex ic systems are safe in normal operation (no fault).

Beside above, what type of protection is Ex e equipment? Exd - Flameproof Enclosure – The protection concept is to contain the explosion and prevent the flame propagation. Following the protection is pure mechanical, i.e. strength of housing and the installation and maintenance of functional flamepaths to avoid flame propagation.

In this manner, what is ex I?

Ex i Intrinsically Safe Electrical Equipment. Intrinsic safety is a technique where the electrical energy available in any spark which can occur in the hazardous area will be non-incentive.

What is an ex area?

Ex areas in the workplace are locations where there is a risk of fire or explosion due to the presence of ignitable substances in the air. These substances include gases, vapors, dusts, and fibers that are present in the air at high-enough concentrations to produce an ignitable mixture.

23 Related Question Answers Found

What is Ex e protection?

Ex d or “Flameproof” means that an enclosure or junction box is constructed and certified as Explosion Protected according to the “Flameproof” standard. Ex e, on the other hand, means that the enclosure is constructed and certified as “Explosion Protected” according to the “Increased Safety” standard.

What is Ex ia protection?

Ex ic is a form of intrinsic safety protection for electrical apparatus in flammable atmospheres. The safety factors and equipment construction requirements are however more relaxed than for the Ex ia and ib protection levels, to take account of the lower risks associated with Zone 2.

Is ip65 Intrinsically Safe?

Fully waterproof and dustproof to IP65, this stainless steel (food grade 316) intrinsically safe enclosure is Ex approved (category 3) in compliance with the European standard for type N restricted breathing devices and the ATEX directive 94/9/EC.

What voltage is considered intrinsically safe?

Intrinsic safety is the method of protection for control and instrumentation circuits where the nominal voltage is 24 VDC or less and the current is normally less than 100 mA. The concept of intrinsic safety is to limit the voltage and current so that there is never a spark with enough energy to create an explosion.

Is intrinsically safe explosion proof?


It means that, should there be an explosion, it will be contained within an enclosure. Therefore, Intrinsically Safe means that an apparatus, such as a temperature transmitter is not capable of causing an explosion. Explosion Proof means that should an explosion occur, it will be contained within an enclosure.

What makes something intrinsically safe?

Intrinsically safe equipment is defined as "equipment and wiring which is incapable of releasing sufficient electrical or thermal energy under normal or abnormal conditions to cause ignition of a specific hazardous atmospheric mixture in its most easily ignited concentration." This is achieved by limiting the amount of

What is an ATEX area?

In a hazardous dust environment, an ATEX Zone 21 is classified as an area that is classified 'as a place in which an explosive atmosphere in the form of a cloud of combustible dust in the air is likely to occur occasionally during normal operation' whereas an ATEX Zone 22 is classified as 'a place in which an explosive

What is a Class 1 Division 1 area?

Class I, Division 1 classified locations. An area where ignitable concentrations of flammable gases, vapors or liquids can exist all of the time or some of the time under normal operating conditions. A Class I, Division 1 area encompasses the combination of Zone 0 and Zone 1 areas.

What does ATEX mean?

ATEX is an abbreviation for "ATmosphere EXplosible". At the same time, ATEX is the abbreviated name of the European Directive 2014/34/EC concerning the placing on the market of explosion-proof electrical and mechanical equipment, components and protective systems.

IS and NIS cable?


What is the difference between IS and Non-IS cable? Non IS cables are used in non-hazardous area, where no special consideration is needed in case of safety. In IS cables, additional sheathings are used to avoid mechanical damages. The cable is coloured as blue.

What is equipment protection level?

Definition: The level of protection assigned to equipment based on its risk of becoming a source of ignition, and distinguishing the differences between explosive gas atmospheres, explosive dust atmospheres, and the explosive atmospheres which may exist in coal mines.

What is ex inspection?

Ex Inspections. In todays challenging world of potentially explosive atmospheres, the requirements of health and safety become more and more demanding but we can provide a total solution to your hazardous area Ex inspections. Ex stands for Explosion Protection and that is exactly what it does.

How do you classify hazardous areas?

Hazardous locations are categorized by class, group, and division as follows. Class I: Denotes areas where flammable gas, vapor, or liquid is present. Class II: Denotes areas where combustible dust is present. Class III: Denotes areas where ignitable fibers are present.

What is the difference between Class 1 Div 1 and Class 1 Div 2?

Class 1 Hazardous Locations refer to facilities which deal with flammable gases, vapors, and liquids. Division 2 specifies that these flammable materials are handled, processed, or used in the defined hazardous location, but are not normally present in concentrations high enough to be ignitable.

What is a Class 2 location?


Class II locations consist of locations where combustible dusts may exist that have the potential to become flammable or ignitable. Locations that would be considered to be Class II include Grain elevators, Flour and feed mills, Metal powder manufacturers, and Coal plants, etc.

What makes a motor explosion proof?

An electric motor is considered explosion-proof when it is capable of containing an internal explosion without rupturing and putting the entire industrial facility at risk.

What is a Zone 1 hazardous area?

Zone 1: An area in which an explosive gas atmosphere is likely to occur in normal operation; Zone 2: An area in which an explosive gas atmosphere is not likely to occur in normal operation and, if it occurs, will only exist for a short time.