What are the different types of protection techniques?
What are the different types of protection techniques?
The most common techniques used globally are as follows:
- Flameproof (d )
- Intrinsic Safety ( i) Intrinsically safe Isolator.
- Increased Safety ( e) Increased Safety Control Panel (Ex ed , to be exact)
- Pressurized Encasement ( p) Oil Immersion ( o)
What is meant by ex protection?
‘Ex e’ means that an enclosure is constructed and certified as Explosion Protected according to the Increased Safety standard.
What is the difference between EXE and EXD?
Exe enclosures, also known as ‘increased safety’ enclosures, are typically the cheaper option, while Exd enclosures offer the additional safeguard of containing any flames. The final decision may be based on the characteristics of the surrounding atmosphere, including its temperature T-rating.
What is ex equipment?
Ex equipment is designed to contain any sparks, flames, or explosions that may be produced by equipment—or to prevent their production altogether. Ex areas and equipment must be classified according to legal requirements that vary by jurisdiction.
What are the example of protective device?
Natures of Protection Devices
- Fuse.
- Circuit Breaker.
- PolySwitch.
- RCCB.
- Metal Oxide Varistor.
- Inrush Current Limiter.
- Gas Discharge Tube.
- Lighting Arrester.
What is ex DB EB?
Ex : Explosion protected. db : Flameproof ‘d’ with level of protection ‘b’. eb : Increased safe ‘e’ with level of protection ‘b’.
What is ex nC?
Ex-nC – mode of protection for sparkling electrical equipment. In this mode of protection, there are different techniques aimed to prevent the contact between flammable substances and sparkling parts.
What is the difference between flameproof and explosion proof?
There is no difference except term. Flameproof design is one of the explosion protection technique extensively used for light fittings, JBs, motors in hazardous areas.
What is the difference between intrinsically safe and explosion proof?
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 is the difference between ATEX and ex?
ATEX and ex-proof classifications help manufacturers select and install equipment for potentially explosive atmospheres. ATEX is used in Europe, whereas ex-proof is used in North America and Canada. The process environment and properties of any materials that will be present need to be ascertained.
What are ex zones?
Explosive Atmosphere Zone Classifications. In an industrial plant such as a refinery or chemical process plant, handling of large quantities of flammable liquids and gases creates a risk of leaks.
What are protection devices?
Protection devices for electrical circuits undertake two main utilities such as consistency and protection. In this, Protection is assured via detaching power supply, and it is the overcurrent protection. To point out, various protection devices act as a protection agent and prevent us from many electrical damages.
What is the most commonly used protective device?
The surge protection device is the most frequently used and also well-organized kind of over-voltage protective devices.
What type of protection is Ex e equipment?
Increased Safety (Ex e): This method of protection prevents explosions by eliminating any source of ignition. Thus no arcing components are permitted.
What is ex D classification?
Ex d gives flameproof protection for apparatus installed in Zone 1 or Zone 2 locations. (The apparatus enclosure is designed to withstand an internal explosion without any damage). Zone 0 is an area in which an explosive gas mixture is continuously present. or present for long periods (a continuous hazard).
What is ATEX Ex db?
EESF 18 ATEX 052X EU-TYPE EXAMINATION CERTIFICATE is a general ATEX product certificate for RTD and TC temperature sensors with Ex db type connection head. Applicable types are listed in the certificate. Sensors may be equipped with a ceramic connection plate or with a transmitter installed in the connection head.
What is the difference between Ex ia and Ex ib?
Both certifications are termed I.S. but they have differing end-use applications. Ex ia may be used in a Zone 0, Zone 1 or Zone 2 explosive area where Ex ib may only be used in Zone 1 or Zone 2 explosive area.
What is increased safety Ex e?
What is ATEX & IECEx?
IECEx and ATEX describe general requirements for the construction, testing and marking of electrical equipment, components or devices intended for use in explosive atmospheres.
What is equivalent to ATEX?
The ATEX as an EU directive finds its US equivalent under the HAZLOC standard. This standard given by the Occupational Safety and Health Administration defines and classifies hazardous locations such as explosive atmospheres.