Archive for March, 2013

Snap-on load detectors/current sensors

LD-50 load detector and high sensitivity current transformers include the following features: LD-50 snap-on load detector mounts on pre-wired systems without disrupting existing connections; broad frequency response: 30 Hz to 15 kHz; measures currents up to 40 A RMS continuous, 120 A intermittent; high reliability long lasting magnetic device; output linear to within 3% from […]

Company’s second “green” office building

Engineering, management and specialist technical services group Aurecon claim to have achieved a first in Gauteng in 2011 when its Lynnwood Bridge Office Park building, near Pretoria, achieved a 4 star GreenStar SA – [Office Design v1, Office Design v1] rating from the Green Building Council of Southern Africa. The building, which was designed to accommodate […]

Power factor correction, switching power supply units

Hengfu of Shanghai, China, has announced the launch of its redesigned 75 W single output series, with power factor correction, switching power supply units.This new unit is designed with a universal AC input that covers the full range from 85 to 264 V AC (120~370 V DC). This provides versatility for a variety of applications. […]

Vice-president appointed

Kefilwe Madingoane Kefilwe Madingoane has been appointed vice-president of the Society of Telkom Engineers. Madingoane holds BEng (Wits) and MEng (UJ) degrees and is employed in the Regulatory Srategy division of Telkom. Contact Neil Jooste, Telkom Society of Engieers, Tel 012 311-4480, joosten@telkom.co.za

Bidirectional testing for fibre characterisation technology

EXFO has announced the addition of bidirectional testing capabilities to its intelligent optical link mapper (iOLM) fibre characterisation technology. The new, patent-pending functionality simplifies the time-consuming task of performing bidirectional measurements at multiple wavelengths and pulse widths, presenting clear pass/fail results in a single link view. This latest iOLM enhancement further speeds up the on-field […]

What is a vector signal transceiver?

by Erik Johnson, National Instruments Software-defined RF test system architectures have become increasingly popular over the past several decades. Almost every commercial off-the-shelf (COTS) automated RF test system today uses application software to communicate through a bus interface to the instrument. Please download pdf

New light on earliest moments of the universe

The C-BASS radio telescope under construction at HartRAO. Astronomers at HartRAO (Hartebeesthoek radio astronomy observatory, located west of Johannesburg) are working on a radio telescope that will shed new light on the very earliest moments of the universe. Once all the systems have been checked out it will be moved to the Square Kilometre Array […]

Co-generation using calcium carbide plant furnace gas

by Mike Rycroft, editor It is estimated that South African mineral smelters and chemical processes have the potential to generate more than 2000 MW of electricity from waste gases. In addition to reducing grid energy consumption, projects of this type qualify for clean development mechanism (CDM) funding and are becoming more and more popular as […]

Switchgear reliability, personnel safety solutions

Information from Eaton   Continuous on-line insulation monitoring is a proven solution to assess switchgear condition in real time and to control failure and workplace safety.   Download the following pdf

Main distribution frames

Tank Industries’ fibre optic management system is tailored to the requirements of central network equipment and designed specifically for connection, termination and distribution equipment in high-speed fibre optic networks. Other features and guarantees of efficient management include easy patching, clearly arranged and monitored fibre guiding, and reliability based on radius restrictions. 19″ solutions for patching […]

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