Electrical Power & Protection


Latest Articles

Spark gap isolation
December 2007
DEHN's EXFS range of isolating spark gaps is designed for installation on conductive system parts in explosive areas, where direct earth connection is not possible. The ATEX-certified devices meet IEC ...

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Mean Well launches a new DC/DC converter
December 2007, Current Automation
The SD-1000 series (1000W) enclosed DC/DC converter has expanded the product range in response to the demand for higher levels of output power. A wide range of DC input voltages are accommodated, 19-72 ...

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Device monitors surge arresters
November 2007
DEHN's LifeCheck electronic tester is able to continuously monitor and control the Blitzductor CT surge arresters. It can recognise in advance a potentially hazardous overload. LifeCheck allows quick ...

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Device combines voltage and current protection
November 2007
DEHN's TNC/TNS/TT/2P multipole combined lightning current and surge arresters provide an all-in-one solution for protecting LV installations against surges and direct lightning strikes. DEHNventil M TT ...

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Do your bit to prevent power cuts
November 2007, CBI-electric: low voltage
Recent events in the Cape have brought the reality of large-scale power cuts into our homes and businesses. Despite the expedited return to service (RTS) initiatives on a number of mothballed power stations, ...

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USB interface adapter
November 2007, VEGA Controls SA
VEGA, a leading manufacturer of level and pressure measuring instrumentation, has recently released a new interface adapter, which connects the USB interface of the PC with the communication interface ...

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Device splits and conditions pulses
November 2007, Temperature Controls
Signal conditioning specialist, APCS, has created the PLS257 pulse splitter for applications where a pulse is required to be isolated, re-powered and repeated on two separate outputs up to a maximum frequency ...

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Switched mode power for PLCs
October 2007, Schneider Electric South Africa
Phaseo switch mode power supplies from Schneider Electric deliver the DC power necessary for PLCs and other automation system control circuits. Modular and universal for common applications, they are ...

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125 W isolated power supplies
September 2007, Current Automation
Mean Well has added two more 125 W isolated dual output models to its G3 series high reliability miniature product family. The RID-125-1205 and RID-125-2405 models are AC/DC switching power supplies that ...

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Solar inverter also functions as UPS
September 2007, Current Automation
Mean Well has launched a DC/AC power inverter with UPS and solar charging function. The new TN-1500 series targets the renewable energy market. The true sine wave inverter can provide 1500 W continuously, ...

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Motor protection system supports multiple protocols
July 2007, Schneider Electric South Africa
Schneider Electric South Africa has launched its new TeSys T advanced motor management and protection system intended for the protection and monitoring of single and three phase squirrel cage induction ...

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Siemens' Sitop supply saves space
July 2007, Siemens South Africa
Siemens Automation and Drives (A&D) is supplementing its 'Sitop modular' series of power supply units with a 20-ampere basic unit for connection to the 3-phase 400/500 V a.c. power supply. Only 70 mm ...

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Industrial surge suppressor protects to 200 kA
July 2007
Asco Power Technologies has developed a transient voltage surge suppression (TVSS) module that provides uninterrupted protection from surge currents of up to 200 kA. This module meets the stringent requirements ...

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Module protects motors and VSDs closely
July 2007, NewElec Pretoria
Protection equipment manufacturer NewElec reports that it is common practice to utilise earth leakage protection relays having a sensitivity of 375 mA or greater for use on three-phase induction motors ...

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Relays protect medium and LV motors
July 2007, NewElec Pretoria
The 320 to 327 series relays from NewElec are designed with a fixed thermal curve that results in as little as a 200 s trip delay for a sustained overload condition of only 1%. Cyclic overloading conditions ...

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RS422/485 card withstands industrial environments
July 2007
Advantech's PCI-1601AU and PCI-1601BU 2-port RS422/485 universal PCI communication cards support both 3,3 and 5 V signal systems, and with their 128-byte FIFO, they are suitable for multitasking ...

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Utility power offers UPS without downs!
June 2007
This year Meissner, a leading South African supplier and manufacturer of uninterruptible power supplies (UPSs), proudly celebrates the supply of continuous power to blue chip and industrial companies ...

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Cat 6 patch cable provides surge protection
June 2007
DEHN, a leading manufacturer of lightning protection and surge protection systems, has introduced the DEHNpatch patch cable for use in Category 6 installations. The device provides surge protection of ...

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Drive-powered energy for safe shut down
June 2007, Current Automation
Power supplies with a DC input voltage of 360-900 V can be directly connected to the intermediate DC-bus of a frequency drive. The advantages are interesting but special precautions are required when ...

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Power supply features automatic output sequencing
June 2007, RS South Africa
Users, from electricians, bench technicians and repair technicians to electrical engineers all have the need for a reliable, accurate and high quality power supply. Some constraints that commonly affect ...

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