Practical Earthing, Shielding, Electrical & Electronic Noise and Surge Reduction

THE WORKSHOP

On day one of this interactive, practical workshop we review the fundamentals of power quality and the procedures for design and installation for earthing and neutral systems. You will cover the common misconceptions, problems and solutions of noise and harmonics in power systems, as well as surge and transient protection.

The second day will help you identify, design, prevent and fix common EMC/EMI problems, with a focus on earthing and shielding techniques. Learning how to fix earthing and shielding problems on the job can be very expensive and frustrating, although it must be noted that most of the principles involved are simple.

This workshop will give you the tools to approach earthing and shielding issues in a logical and systematic way. The overall focus is on useful design and systems issues; not about regulations and standards. The idea is that you will take this material back with you to your work and apply the key principles immediately to your design and troubleshooting challenges.

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?

  • Building service designers
  • CAD managers
  • Consulting engineers
  • Control engineers
  • Data systems planners and managers
  • Design engineers
  • Electrical and instrumentation technicians
  • Electrical engineers
  • Electronics and systems engineers/technicians
  • EMC specialists
  • Instrumentation engineers
  • Logic designers
  • Mechanical engineers
  • Power system protection engineers
  • Printed circuit board designers
  • Signal integrity specialists
  • Test engineers
  • Technical managers

CONTENT SUMMARY

REGISTRATION & INTRODUCTION

  • Fundamentals
  • What is power quality and EMC?
  • Interference sources
  • EMI/EMC regulations
  • IEC/IEEE and FIPS standards
  • Interfacing with electrical utilities

RECOMMENDED DESIGN AND INSTALLATION PRACTICE

  • Wiring, earthing and distribution systems
  • Dedicated and derived neutral systems
  • Earthing and bonding equipment

EARTHING AND NOISE CONTROL

  • Site auditing for noise control
  • Misconceptions in performance earthing
  • "Single point" vs "multi point" techniques
  • Noise and the zero signal reference grid

SURGE AND TRANSIENT PROTECTION

  • Lightning phenomena
  • Power system faults and switching surges
  • Mitigation techniques - case study

HARMONICS IN POWER SYSTEMS

  • Principles of harmonic analysis
  • Harmonic phase angle and sequence
  • Control of harmonic pollution
  • Converters and inverters
  • Theoretical and practical values of harmonic currents
  • Effect on conductors and neutral overloading
  • Harmonic filter design
  • Protection of capacitor banks
  • Inverters design for low harmonic output

HARMONIC SITE ANALYSIS PROCEDURES

  • Harmonic analysers
  • Measurement - voltage or current?
  • Measurement fundamentals and true RMS/predictive analysis
  • Harmonic order and sequences and resonance
  • Voltage and current waveforms (signatures)
  • Harmonic interaction auditing

CASE STUDIES

  • Checklist for powering, earthing and communications
  • Commercial buildings
  • Manufacturing and process control
  • Medical facilities
  • Computers and data processing environments
  • Telecommunications

BASIC PRINCIPLES OF NOISE REDUCTION

  • Importance of wiring inductance
  • Noise coupling examples
  • Common and differential modes
  • Balanced circuits and common mode rejection

PRINCIPLES OF EARTHING

  • What is electrical earthing?
  • Function of an earth
  • Analogue and digital earthing
  • Single point, multipoint and hybrid earths
  • Earth grid technique
  • Isolated earthing technique

DIAGNOSIS OF NOISE PROBLEMS

  • Relating symptoms to causes
  • Ringing, rounding and reflections
  • Practical methods of diagnosis
  • Noise coupling examples

NOISE REDUCTION TECHNIQUES

  • Minimisation of bandwidth
  • Best place to earth cable shield
  • Reducing mutual inductance

POWER CIRCUITS AND POWER SUPPLIES

  • Power quality and EMI
  • Filters and transient protection
  • Switch mode power supply design

INDUCTIVE AND CAPACITIVE SHIELDING

  • Materials and limitations
  • Openings and penetrations
  • Magnetic fields
  • Shielding design guidelines

REDUCTION OF ELECTROMAGNETIC COUPLING

  • EM shielding of cables
  • Shielding for ESD and RF
  • To shield or to filter?

SELECTION OF THE RIGHT CABLE AND CONNECTOR

  • Cable earthing and crosstalk
  • Cable shielding and connectors

CIRCUIT BOARD EARTHING ISSUES

  • Identification of critical circuits
  • Embedded controllers and EMC
  • Component placement

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