Practical Intrinsic Safety for Engineers and Technicians

THE WORKSHOP

This practical, intensive workshop explains the application concepts of explosion protection using Intrinsic Safety (IS or Ex 'I'). This is with reference to British, European and international standards for the certification and use of electrical 'apparatus'. Where electrical equipment is used in 'Potentially Flammable Atmospheres', the IEC79 series of international standards are now emerging and gaining acceptance in order to develop a global approach to hazardous area plant safety. The workshop covers IS as the preferred technique for instrumentation applied to industrial plant inputs/outputs in hazardous areas. The principles of IS do not change since these are based on the laws of physics, however, the implementation of IS is open to interpretation and causes some conflict as the subject is still seen as a 'black art'.

The workshop aims to widen the understanding of this technique by explaining the basic rules within the context of their application. Engineers and technicians working in hazardous process control and instrumentation areas must have an understanding of the close integration between the safety and operational aspects of intrinsic safety as a protection technique in order to specify, design and maintain systems. The workshop is designed to explain the theory of IS and its close integration with operational signal transfer. You will gain a greater understanding of IS loop concepts as a basis for working with measurement and control loops using standard and custom IS solutions. Defining and applying the correct terminology will assist you in communicating and documenting important safety details.

WHAT IS INCLUDED?

  • Receive a certificate of attendance in support of your continuing professional commitment
  • All workshops include the associated hardcopy technical manual
  • Printed workshop handouts
  • Lunch and refreshments
  • Interact and network with workshop attendees and experienced instructors
  • Practical, industry driven content to assist you in your continuing professional development (CPD)
  • Attendees automatically become IDC subscribers and receive exclusive deals and technical content every month

WHO SHOULD ATTEND?

  • Design engineers
  • Electrical technicians and engineers
  • Engineering managers and supervisors
  • Instrument technicians
  • Instrumentation and control technicians and engineers

CONTENT SUMMARY

BACKGROUND TO HAZARDOUS AREAS

  • Explosion consequences
  • Definition of hazardous area

REVIEW OF PLANT AREA AND APPARATUS CLASSIFICATION SYSTEMS

  • Properties of gasses
  • Protection requirements
  • Zones and definitions
  • Apparatus grouping definitions

PRINCIPLES OF INTRINSIC SAFETY

  • Background and history
  • Energy limiting concept
  • Gas ignition curves
  • Hazardous area apparatus
  • Simple apparatus
  • Safe area associated apparatus and interfaces
  • Barriers and isolators
  • Systems concepts

APPLICATIONS

  • Introduction to applications
  • Status inputs

OTHER METHODS OF PROTECTION

  • Separation: Ex p, o, q, m
  • Construction: Ex n, e
  • Containment: Ex d
  • Special: Ex s
  • Design: Ex i (ia and ib)

APPLICATIONS

  • Analogue inputs
  • High level
  • Systems

EARTHING AND BONDING

  • Basic principles
  • Requirement for IS systems
  • Noise and interference control
  • System earthing approach

APPLICATIONS

  • Low level measurements
  • Temperature
  • Strain gauge bridge
  • Techniques for solving application problems

STANDARDS AND CERTIFICATION/APPROVAL

  • Authorities
  • Marking
  • Apparatus and systems certification
  • Systems descriptive documentation

INSTALLATION

  • Relevance of codes of practice
  • Interpretation of IEC79-14
  • Safe area requirements
  • Safe area apparatus
  • Interconnecting cabling and junction boxes
  • Hazardous area apparatus

INSPECTION AND MAINTENANCE

  • Interpretation of IEC79-17
  • Grades of inspection
  • Requirements for IS
  • Use of tools
  • Procedures
  • Test equipment suitability

FAULTFINDING AND COMMISSIONING

  • Safe methods
  • Earthing requirements
  • Common problems
  • Loop testing
  • Repairs

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