May 2000
GE Power Management's universal relay is designed to serve as the 'engine' for substation automation. The relays feature high performance protection with high speed open standard peer to peer communications - the necessary components of a succesful 21st century power system. The logic that determines the interactino of inputs, features and outputs is re-configurable through the use of logic equations (FlexLogic). The relay has three communication ports that operate independently and simultaneoously. The protocols that are supported are Modbus RTU up to baud rates of 115 kbs and an Ethernet port supporting MMS/UCA2.0, DNP3.0 and Modbus TCP/IP protocols.
Blaize Magee - DRIVECOR SOUTH AFRICA
Regular Features
Forum
Clipboard
Product news
Analytical Instrumentation
Innovative measuring techniques for sewage treatment plants
John Immelman (Endress+Hauser) ,
The treatment of wastewater, especially sewage, has recently become more critical as rural communities move into the cities, placing unprecedented pressure on sewage treatment plants
Drives, Motor Control, Protection and Switchgear
Digital soft starters - intelligence and power to assist the user
Ronnie King (Varispeed) ,
We review the features of a typical modern soft starter and then refresh our memories regarding a typical application in pumps
Reviewing the basic fuse construction
Ultich Haas (Siba Fuses, Germany) ,
Fuses are frequently used in various applications, including the protection of motors
Engineering Projects and Plant
The new Eskom National Control Centre - Simmerpan
This project showcases the advances in thinking relating to control room design and the need to use such national assets as educational and marketing opportunities
General
Electrical Equipment Exhibitions
Sensors, Switches and Transducers
Choose the right photoelectric sensing mode
Rodney Topham (RET Automation Controls) ,
When using a photoelectric sensor the trick is to match the right sensing mode to the application
Opto Sensors for the user
Tim Baker (IFM Electronic) ,
Most opto sensors are pretty good, but there is always room for improvement. Where, however, should the improvements be made?
Standby and Backup Systems
New UPS topologies and standards give users peace of mind
Newton King (MGE UPS Systems) ,
New standards make the task of selecting appropriate UPS's for specific applications simpler and safer
