Ex Points to Ponder
Track the waekest link in Safety Chain Ignition Sources at a Glance IEC 60079-10-1 Suggested presentation of hazardous areas (IEC 60079-10-1) Hazardous area zones – Preferred symbols Stable Ex systems
Concept Animations
Short animations for clarity of basic concept of Ex domain. The three components of Hazardous Area Explosion Concept of Explosive (Fire) Triangle The main difference between IEC 60079 and NEC … Continue reading
An artwork is worth a thousand words
Ex concepts in simple artwork / An Ex-Pert / Temperature Class differences / The 3 types of Stresses on Electrical Equipment in Ex environment / Electrical + weather + Ex … Continue reading
Stresses on Electrical equipment in Haz Loc
The Details are as follows Every electrical equipment operating in Hazardous Area (location) is always under the following stresses :- Electrical Weather Ex Ways to Clear the Ex Stresses on … Continue reading
Annex F- 60079-10-1
Release & Sources of Release Meaning of Release: Whenever there is a release of (say) GAS from a gas-container it is from a SOURCE. This source has actually “HELPED” the GAS to … Continue reading
Inter-linked Ex Parameters
Inter-linked Ex Parameters Quality & Quantity Poetry & Engineering In order to ensure the safe operation of the industrial processes, safety of the involved-staff & property in Hazardous Areas, … Continue reading
ZONES Revisited
The term “ZONE” & its concept is a coordinated way to classify Hazardous Areas Before we embark on our journey into the ZONES , let us update our information about … Continue reading
ISO 80079-36 (Ed-1-2016)
Let us visit the new and informative avenue of THE IGNITION HAZARD ASSESSMENT Let us proceed.. This is the Main Entrance The essential prerequisites for exploring this avenue is as … Continue reading
Difference Between NEC & IEC
This simple Synchronizing (In fact HARMONIZING) device does not exists ……presently. The concept is there and The Ex-perts are aware of it . IEC cannot guide for clarity in NEC … Continue reading
IECEx
A Stairway to Safety Background Hazardous Area Area in which an explosive atmosphere is present, or may be expected to be present, in quantities such as to require special … Continue reading
Harmonics & Hazardous Area
HARMONICS Some Definitions to start with:– From the Enchanting world of MUSIC:– An overtone accompanying a fundamental tone at a fixed interval, produced by vibration of a string, column … Continue reading
GROUPS – A multidimensional concept
GROUPS Any flammable gas or dust in mixture with air, forms an IGNITABLE EXPLOSIVE MIXTURE and if present in sufficient quantities, in an area, creates an EXPLOSIVE ATMOSPHERE and make … Continue reading
Explosive atmospheres – Part 33: Equipment protection by special protection ‘s’
Explosive atmospheres – Part 33: Equipment protection by special protection ‘s’ IEC 60079-33 ‘s self-introduction is as follows:- The purpose of IEC 6 0079-33 special protection “s” for any equipment … Continue reading
The Most Versatile Ex Component
The most versatile component used in electrical equipment in Hazardous Areas is the ENCLOSURE. It is THE core product of almost all multinational Hazardous Area Equipment manufacturers. Analysis of Important … Continue reading
Flash-Point & Auto-Ignition Temperature
Flash-Point & Auto-Ignition Temperature An Actor with natural talent for playing villainous roles Temperature is an actor present in all scenes of a Hazardous Area ,ready to play its inherently villainous … Continue reading
Equipment Protection Level : Made Easy
Equipment Protection Level : Made Easy In electrical engineering, SWITCH is a SIMPLE COMPONENT that can MAKE or BREAK an electrical circuit . (Wikipedia) The ASCENT OF THIS simple device can … Continue reading
Risk Reduction, as explained in EN 1127
Risk Reduction, as explained in EN 1127 First Step Prevention The old proverb “an ounce of prevention is worth a pound of cure ” is the underlying philosophy of the … Continue reading
ROAD MAP to Safety
Road Map to Safety The structured road-map of EN1127 (A graphic appreciation of EN 1127) EN 1127 is a fine example of the way the present-day Standard Documents, owned by … Continue reading
Ignition Sources
Ignition Sources in Hazardous Areas The officially recognized IGNITION SOURCES or ‘FIRE STARTERS ‘ are given in European Standard EN 1127-1 (2011). Their number is 13 ! listed as … Continue reading
Electrostatics & Hazardous Areas
Electrostatics & Hazardous Areas Static Electricity has been known since antiquity (approx.. 2500 years) but its impact on humankind was not significant enough to generate the interest of the inquisitive … Continue reading
Into the world of IEC 60079-14
The World of IEC 60079-14 IEC 60079-14 is one of the most important International Standard ,specifying the requirements for :- The Design The Selection & The Physical Set-up The Initial … Continue reading
Safety Shops
A Brief Description (North side of old downtown ….in cross stitch by RAJAA) The old Safety Shop around the corner A safety shop is an interesting place , to visit … Continue reading
Dos & Don’t s of Hazardous Area
Dos & Don’t s of Hazardous Area Protection Hazardous Area Protection (HAP) is a multidimensional Process. Each , apparently, independent parameter is in fact closely related to the others . … Continue reading
IEC 60079 Application
APPLICATION of IEC 60079 (IEC 60079 driving the Safe, Oil & Gas Industry) IEC 60079 is a set of documents with details of Standards & Specifications which encompasses all aspects … Continue reading
INDUSTRY 4.0
Industry 4.0 & Ex 4.0 The term “Industry 4.0” refers to the anticipated upcoming INDUSTRIAL REVOLUTION No.4.0 The term Industrial Revolution was popularized by the Economic Historian Arnold Toynbee … Continue reading
Intrinsic Safety (IS)
Intrinsic Safety (IS) Technical Guideline : IEC 60079-11 (edition: 6.00 2011-06) Definition Type of protection based on the restriction of electrical energy within equipment and of interconnecting wiring exposed to … Continue reading
Introduction to Expertdesk
expert-desk FROM THE EXPERT DESK INFORMATION Paper 1 THE NEW ATEX DIRECTIVE A simple modular description Concept & Source : our experts
More about Ex..for the non-Ex
More about Ex …for the non-Ex Let us start our discussion-of-the-day with a cup of coffee & a good breakfast. Of course we will have to prepare it first. Kitchen … Continue reading
Temperature Class
Temperature Class The concept of Temperature Class is best described by IEC 60079.0 by combining definitions, tables and specification , thus creating a road-map to clarity Let us follow that … Continue reading
IEC 62305-Protection Against Lightning
IEC 62305-Series of documents (Standards) is one of the most comprehensive set of Guide-Lines for the concerned professional of the respective trade, for the PROTECTION AGAINST LIGHTNING. The series consists … Continue reading
Increased Safety Terminal Box Power Dissipation
Maximum dissipated power of Terminal Box Enclosure IEC 60079-14 Let us first define an Electrical Terminal / Junction Box An electrical junction / Terminal box is a container for electrical connections, … Continue reading
Optical Radiation Hazard
Optical Radiation : Ignition Risk & protection in Hazardous Areas The industrial use of equipment, utilizing OPTICAL RADIATION , is increasing day-by-day. The most common use is in the fields of … Continue reading
Ex Terminology
Ex Terminology Class ( locations) Creepage & Clearance Equipment Protection Level EPL Explosion Explosive Atmosphere Explosive Gas Atmosphere Explosive Dust Atmosphere Explosive Limits (upper & Lower Explosive) Flammable Substance Flash point … Continue reading
Minimum Ignition Current (Ratio)
Minimum Ignition Current ratio The minimum current required from an inductive spark discharge to ignite the MOST EASILY IGNITABLE MIXTURE of a GAS, MIST or DUST in air …..relative to … Continue reading
Glance: Ex Art
Ex Art (The, almost, hidden side of Hazardous Area protection) More …at Ex-Art
Ex Components
What is an Ex Component ? Definition : An Ex component is a part of electrical equipment or a module , marked with the symbol U, which is not intended … Continue reading
ATEX , IECEx & NEC
A personal view about Hazardous Area Codes Making , Specification , Testing & Certifying process The DIRECTIVE 94/9/EC has been replaced by a new DIRECTIVE 2014/34/EU. The old directive was … Continue reading
Selection of Electrical Equipment
Selection of Electrical Equipment for Hazardous Area Outline of procedure , in following simplified form , for selection of electrical equipment for installation in hazardous Area. The procedure is being presented … Continue reading
Equipment Protection Level
Equipment Protection Level (EPL) Its a Concept. This is a part of risk assessment method It has been introduced to enable an alternate approach to current methods of selecting Ex … Continue reading
Ex & Degrees of Protection (IP) According to IEC 60529
Ex & degrees of Protection (IP) according to IEC 60529 in comparison to NEMA Enclosure-Types. A system for classifying the degrees of protection provided by the enclosures of Electrical Equipment … Continue reading
Condensation of Water & Breather Gland
Condensation is a natural process by which the physical state of the matter is changed from GASEOUS STATE into LIQUID STATE. This process is opposite to that of VAPORIZATION. In this … Continue reading
Maximum Experimental Safe Gap
Maximum Experimental Safe Gap (MESG) Definition: (Ref: IEC 60079-1 ) Maximum Experimental Safe Gap (for an explosive mixture ) of a joint 25mm in width which prevents any transmission of … Continue reading
DUST Groups
Electrical Equipment for Group III (DUST) Electrical Equipment for use in explosive Atmospheres are divided according to the following types of explosive atmospheres (To facilitate the procedure of selection … Continue reading
[Associated Apparatus]
[Associated Apparatus] Power Reduction philosophy for Intrinsically Safe devices operating in Explosive Atmosphere References IEC 60079-Part 0: Equipment – General requirements IEC 60079-25: Explosive atmospheres – Part 25: Intrinsically safe … Continue reading
Documentation & Certifications
IEC 60079-14 gives us an over-view of the necessity & importance of the process of documentations for Hazardous Area Installations. By documentation we mean the material in Printed or … Continue reading
EXPLOSIONPROOF or FLAMEPROOF
A haunting question. Is it a dilemma or a complete solution ….does it require the NEC-IEC vision… Let us see… We will use the following picture as a symbolic representation … Continue reading
IEC Time Line
The time-line of Hazardous Area Protection Domain Safety Lamp by Sir Humphrey Davey, coal mines and the time-line of Hazardous Area Protection Techniques Coal is a source of energy. The … Continue reading
Ex (As per ATEX Directives)
Ex (As per ATEX Directives) This Hexagon Logo with “Ex” marked inside is as per specification of ATEX ( ATmosphères EXplosives ) . This mark along with the EC mark, … Continue reading
Zone II
Reference Documents: 60079-15 (Equipment protection by type of protection ‘n’) SCOPE: IEC 60079-15 is applicable to: Non-sparking electrical equipment Equipment having parts or circuits producing arcs or sparks Equipment … Continue reading
The Fire Triangle & The Dust Explosion Pentagon , The Fire Diamond
The “Fire Triangle” is a graphic representation of a concept, used to list the following prerequisites of an explosion:- FUEL (Flammable Material in form of GAS or Vapors ) Oxygen from the air … Continue reading
The Safety Lamp
THE BEACON OF SAFETY A short trip down the History Lane . Safety lamp for coal mines is a special lamp that provides illumination, using a small … Continue reading
To use..or NOT to use ..Conduit-Hub or Cable-Gland
NEC Art Gallery CONDUIT HUBS Conduit Hubs are used to terminate the conduits into an enclosure . Hub is installed, through a drilled hole into the certified enclosure and fastened … Continue reading
To Use… or NOT to use.. Conduits or Cables
Conduit or Cable for Ex d or Ex de Enclosures The term ‘Conduits’ refer to the use of Ex-certified metallic pipes to house the insulated electrical wires for transfer of … Continue reading
Ex-pert Electrical Technologies 