Electricity + Control June 2015

CONTENTS

4

14

32

36

Control systems and automation 4

Scientific Automation in wind turbines By P Dresselhaus, Beckhoff Automation

7

Round UP

Pressure and level measurement 14

Level measurement with float systems in sanitary applications By M Jung and J Zieser, WIKA

18

Round UP

Electrical protection and safety 22

Surge protection concept for LED street lights By B Leibig and D Dürr, DEHN + SÖHNE

26

Round UP

Plant maintenance, test and measurement 28 Pure process design By S Silvestre, Siemens 30 Round UP

Cables and accessories 32

Simplifying ‘Green' cabling installations By D Gunnewegh, Helukabel

34

Round UP

Energy and enviroFiciency 36

Managing the UAV data explosion By W Warren, Raima Inc

38

Round UP

Regulars

Cover

1 Comment 21 Cover article 40 Light + Current 41 Bizz Buzz 42 Social Engineers 44 Clipboard

WIKA and 3D Instruments , LP, understand how important it is that your designs and equipment succeed despite being in the most extreme pressure situations. Read more on page 21.

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

FEATURES: • Control systems and automation • Pressure and levelmeasurement • Electrical protection and safety • Plantmaintenance, test andmeasurement

• Cables and accessories • Energy and enviroFiciency

E+C June2015 cover.indd 1 www.electricityandcontrolmagazine.co.za 2015/05/20 04:10:54PM