Electric shock and arc flash are potentially very dangerous events that can cause severe or fatal injuries. The damage and injury to the body are proportional to amount of current through the body, and the current density. To ensure adequate safe work practices, technical staff must understand safety regulations, electrical hazards and the use of safe work procedures and protective equipment.
Student completing this course will gain knowledge on safety procedures.
This course is designed to help students to acquire basic knowledge of AC/DC electricity and hazardous areas from the initial nature of the problem.
WHO SHOULD COMPLETE THIS COURSE
- Experienced Electricians
- Substation Technicians
- Electrical Engineers
- Instrumentation Engineers
- Supervisors
- Safety Managers
- Electrical and HVAC Technicians
- Plant Operators
- Linemen
- Occupational Health and Safety Professional
COURSE OUTLINE
INTRODUCTION AND OVERVIEW
- Explosion- Definition
- Types of Hazards
- Methodology of risk protection
- Overall plant safety strategy
EXPLOSION PROTECTION
- International Electro technical Committee(IEC)- Standard series
- Sources of ignition from electricity
- Heat- Ignition temperature and Flammability
- Limits of flammability
- Principle of protection
DUSTS : IEC61241 AND APPARATUS GROUPING
- Dusts- Properties
- Equipments for protective systems
- Emergence of Apparatus grouping
- Temperature classification
- T Rating for apparatus
- Ambient Temperature Classification System
- Concepts of Explosion Protection
PRINCIPLE OF EXPLOSION CONFINEMENT
- Special Protection Ex ‘s’
- Zones of Protection
CLASSIFICATION OF AREA
- Principles of Overall Safety Assessment
- Design Objective
- Hazardous and Non Hazardous Area
- Systematic Approach to Area Classification
- Standards for Area Classification
GENERAL REQUIREMENTS OF AREA CLASSIFICATION
- Guidelines in terms of Standards for different industries
- Classification under ‘Source of Release’ method
- Zones of Protection
- ‘Normal’ and ‘Abnormal’ Plant Operation
- Area Classification Process
- Ventilation- Types, Requirements and Availability
GAS AND VAPOUR RELEASE CALCULATION
- Mathematical Approach
- Release rate of gas or vapour
- Estimation of persistence time
- Area Classification- Dust
- Policy and Guidelines for Implementation
EXAMPLES OF AREA CLASSIFICATION
- Tank Area Classification
- Summary of Area Classification
CONSTRUCTION OF PROTECTION CONCEPT ‘d’
- Explosion Containment
- Flameproof- Definition and Illustration
- Ex d Gap Construction
INTRODUCTION TO MAXIMUM EXPERIMENTAL SAFE GAP (MESG) AND CABLES
- MESG- Definition
- Pressure Pilling
- Cable entries and glands
- Maintenance Procedure
- Grouping and effect of Temperature Classification
INTRODUCTION TO INTRINSIC SAFETY Ex ‘i’
- Overview of Intrinsic safety
- Energy and Power
- Different types of Intrinsically Safe Apparatus
IGNITION SOURCES COVERED BY IEC 60079-11 STANDARDS
- Mechanical Ignitions
- Thermal Ignitions
- Types of Electrical Ignitions
INTRODUCTION TO HAZARDOUS AREA APPARATUS
- Simple Apparatus
- Safety Description of Apparatus
GENERAL REQUIREMENTS OF PROTECTION CONCEPT ‘e’
- IEC Standards of Europe/Australia and North America
- Construction techniques and arrangements of Ex ‘e’
- Testing requirements of Ex ‘e’ Motor
- Additional requirements for rotating electrical machines
- Starting Current Ratio
SELECTION AND INSTALLATION OF PROTECTION CONCEPT ‘n’
- Type of protection ‘n’
- Construction techniques of Ex’ n’
- Selection and installation of Ex ‘n’
- General requirements of construction
- Ex ‘n’- Various techniques
DESIGN REQUIREMENTS OF PROTECTION CONCEPT PURGE ‘p’
- Definitions
- Standards and Certifications in brief
- Construction requirements
- Principles of application
- Other design requirements
OTHER CONCEPTS OF PROTECTION
- Design requirements of Protection concept ‘o’
- Applications of Protection technique ‘q’ and ‘m’
- General requirements of Protection concept‘s’
- Dust Risks- IEC 61241
INSTALLATION AND INSPECTION OF ELECTRICAL APPARATUS
- Scope
- Electrical installations in hazardous areas
- Documentation/Information required by Installer
- Provisions made for the use of uncertified apparatus
- Selection of electrical apparatus
- Protection from dangerous sparkling
GENERAL REQUIREMENTS OF EARTHING AND BONDING
- Definitions and terms
- Structural Earthing
- Parasitic Capacitance
RECOMMENDATIONS FOR INSPECTION AND MAINTENANCE OF ELECTRICAL INSTALLATIONS IN HAZARDOUS AREAS
- Requirements of Hazardous areas installations
- Hazardous area rules
- Preventive Maintenance Inspections
STANDARDS AND CERTIFICATION MARKING
- ISO and IEC – Overview
- Functions of CENELEC
- Description of System Certificates and Certified Documents
- Explosion Protection Documents and its types
INTRODUCTION AND OVERVIEW OF ATMOSPHERES EXPLOSIVES (ATEX)
- Scope of the directive
- Essential safety requirements of ATEX
- Categories of surface industries
- Fundamental principles for ATEX directives
- CEN: Standards for NON-Electrical equipment
