Electrical Power & Protection


Latest Articles

Comprehensive protection for LV motors
April 2012, NewElec Pretoria
NewElec’s N Series electronic motor protection relays are designed to protect LV motors. They offer the user a choice of protection features, mounting options, and a choice of appropriate motor thermal ...

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Power tubes and high-voltage capacitors
April 2012
Denver Technical Products, a major supplier of power tubes, high-voltage capacitors, high-voltage relays and hard-to-find electronic components, now also offers rebuilding of power tubes that carry better ...

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Motor protection relays for confined spaces
April 2012, NewElec Pretoria
NewElec’s 100M Series of electronic motor protection relays are compact in design and are ideally suited for fitting into gate-end boxes for protecting underground coal cutting machinery and transformers. ...

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Lightning current arresters for power supply systems
April 2012
The modular DehnBloc M lightning current arresters are energy coordinated with Dehn’s Type 2 DehnGuard arresters without the need for additional cable lengths or decoupling coils. DehnBloc M is ideally ...

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Reliable phase rotation protection
April 2012, NewElec Pretoria
There are times when it is important to ensure that machinery does not rotate in the incorrect direction, and the inclusion of phase rotation protection within a motor protection relay makes good sense. ...

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Precise timekeeping for 'Smart Grid'
March 2012, RJ Connect
Get substation automation in sync with IEEE 1588v2

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Fire protection for substations
March 2012, Alien Systems & Technologies
Pyrogen aerosol generators localise the fire source and minimise collateral damage

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Concentrated solar power
March 2012, Siemens South Africa
A key technology for sustainable power generation in Africa. The average daily solar radiation in most African countries makes concentrated solar power (CSP) one of the most attractive renewable energy ...

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Voltage detection in MV switchgear
March 2012
Integrated voltage indicator with relay output. The Vois R+ from Kries is an integrated capacitive voltage indicator according to the IEC 61243-5 standard for voltage detecting in medium voltage switchgear. ...

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Omron South Africa completes first solar PV installation
March 2012, Omron Electronics
Omron South Africa has recently completed its first photovoltaic installation using a 10 kW grid-tied 400 V inverter. The solar PV panel is roof mounted on a light weight aluminium structure designed ...

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Avoiding short circuits
March 2012, PI SA (PROFIBUS & PROFINET SA), NewElec Pretoria
In a motor circuit a short circuit condition occurs when the insulation between the phase conductors fails and the load current level exceeds the normal locked rotor current level that the motor would ...

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SPS power supply from Manson
March 2012, MANTECH
The SPS series power supply from Manson is a high power regulated, variable voltage, constant current switch mode power supply with voltage and current indication. The SSP series provides 25, 40 and 60 ...

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Surge arrestors for DC photovoltaic applications
March 2012
The rapidly growing PV industry has placed exceptional demands on the available SPD products intended to protect systems components such as inverters, arrays, or combiner box components from the effects ...

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Sustainable, cost-effective solutions from Eaton
March 2012
Forward-looking building technology saves energy, protects the environment and safeguards investment. At Eaton, green building solutions encompass the interlocking areas of power distribution, power ...

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Sensitive earth protection relay with no tripping
March 2012, NewElec Pretoria
NewElec’s GA earth leakage protection relay enables more sensitive earth leakage protection of high kilowatt motors started direct-on-line, as well as variable speed drive applications, without nuisance ...

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Rack control and monitoring unit
March 2012
Mean Well has launched new peripheral control and monitoring units to collocate with RCP-2000 rack power, RKP-CMU1 and RKP-1Ux-CMU1 for more complete rack power solutions. Up to 32 units of RCP-2000 can ...

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Gigavac sealed contactors
March 2012
Denver Technical Products continues to expand its range of Gigavac GX Series EPIC (Extended Performance Impervious Ceramic) sealed AC and DC contactors capable of switching from 12 to 750 V. These small ...

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Locking male connectors simplify panel feedthroughs
March 2012
Wago has expanded its Mid Multi Connection system (MCS-MIDI) to include locking male connectors with snap-in flanges. Using these male connectors, panel feedthroughs for 5–2,5 mm panel wall thickness ...

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Portable lightning detector by StrikeAlert
March 2012
TufTek has introduced a dependable and easy-to-use portable lightning detector. StrikeAlert is a small and affordable unit that provides early warning of approaching lightning strikes from as far away ...

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Terminal blocks with pushbuttons
March 2012
Wago has launched the new 2060 Series of unique one-, two- and three-pole SMD terminal blocks. Equipped with integrated pushbuttons, the 2060 Series provides easy insertion and removal of all conductor ...

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