Electricity + Control January 2015

CONTENTS

Control systems and automation 4

Conveyor control system for mining... By C du Plessis, ifm electronic

6

Round UP

Drives, motors and switchgear 12

Installing and commissioning motors... By H du Preez, Consultant

16

Round UP

Earthing and lightning protection 18 When and Where should Which surge protection be used?... By Dipl Ing R Hausmann, Phoenix Contact 22 Round UP

Standby and back-up 24

Gas-generated electric power – with benefits... By N Alwar, Barloworld Power

27

Round UP

Pressure and level measurement 28 Process safety through diaphragm seal systems with diaphragm break monitoring... By J Breunig and J Zipp, WIKA 32 Round UP

Energy and enviroFiciency 34

Uganda’s energy sector: Challenges and opportunities... By R Mbabazi (Makerere University), Professor B Sebitosi (Stellenbosch University), Dr Julianne Sansa-Otim (Makerere University, Dr Richard Okou (Makerere University)

39

Round UP

Regulars

Cover

1 Comment 11 Cover article

Beckhoff ’s ‘New Automation Technology’ philosophy repre- sents universal and open control and automation solutions that are used worldwide in a variety of ap- plications. Read more on page 11 .

Visit our innovative online technical resource for the engineering industry. www.eandcspoton.co.za

39 Greenie Beanie 40 Light+Current 40 Bizz Buzz 43 Social Engineers 44 Clipboard

FEATURES: • Control systems and automation • Drives,motors and switchgear • Earthing and lightning protection • Standby and back-up • Pressure and levelmeasurement • Energy and enviroFiciency:Africa

E+C Jan 2015 cover.indd 1

2014/12/18 11:18:41AM