Maintenance and commissioning of protection relays: CMC 256plus

Maintenance and commissioning engineers regularly have to test protection relays as well as calibrate measurement transducers, energy meters, and power quality devices. For protection relays, testing on site is common practice, whereas the other devices in many cases are sent to a laboratory for calibration, resulting in considerable efforts and costs. In order to cover all test applications and all calibration tasks on site with a single instrument, reliability, powerful output characteristics and outstanding precision must be combined in one instrument.

Commissioning waste water treatment plants

The Pimpama Treatment Plant was built as part of Gold Coast Water’s Pimpama-Coomera Waterfuture Master Plan to provide Class A+ recycled water to the surrounding community. The plant consists of a wastewater treatment plant which was commissioned late 2008 followed by a recycled water treatment plant that is now at the final stages of commissioning. Included in this paper is a discussion of various challenges encountered during the startup and commissioning phases of the wastewater treatment plant. Throughout this period the operations team benefited by gaining expanded knowledge and experience in addressing issues that would otherwise rarely be encountered during typical daily plant operation.