Electricity + Control July 2015

CONTENTS

4

26

36

42

Control systems and automation 4

IEC-61850 – Promise and pitfalls by K Mahoney, Casco Systems LLC MAC meets market needs effectively information provided by Omron

8

10

Round UP

Flow measurement and instrumentation 18

Particle Time of Flight: Reflections on gas flow measurement in hazardous environments by T Moorhouse (ex Photon Control), S Ante (contributor), S Braver, Martec Asset Solutions

21

Round UP

Drives, motors and switchgear 26

Brushless Servo operating principles by G Craig, Techlyn

29 31

70 % Savings on power costs with modular energy saving system by N Maleka, SEW EURODRIVE

Round UP

Valves and actuators 36

How to select the right valve by T Young, Vortex

39

Round UP

Energy and enviroFiciency 42

Seeking cleaner and safer energy solutions Information compiled by The South African Civil Society Information Services (SACSIS)

46

Round UP

Regulars

Cover

1 Comment 17 Cover article 48 Light+Current 49 Bizz Buzz 51 Social Engineers 52 Clipboard

The only manufacturer of circuit breakers and related devices in Africa, CBi-electric is a truly South African success story. Read more on page 17.

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

FEATURES: • Control systems and automation • Flowmeasurement and instrumentation • Drives,motors and switchgear • Valves and actuators • Energy and enviroFiciency

E+C July 2015 cover.indd 1 www.electricityandcontrolmagazine.co.za 2015/06/25 10:12:06AM