Posts Tagged ‘electrical equipment’

Top 10 reasons of equipment failure and overvoltage

February 2nd, 2015 | Make a comment | Posted in Electrical distribution
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You all really liked the top 10 articles serie we’ve been sharing lately. So we’re providing you more!

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Most of the complaints that get registered about the damage of electrical equipment state that, “the equipment failed after power interruption.” But what might have caused these power interruptions? Lightening? Voltage swells? Or switching transients?

Sometimes the reasons behind power interruptions are quite obvious and sometimes, they are not. There are many known and unknown reasons that lead to equipment failure following power interruptions. Following reasons occupy top 10 positions in such list:


What are Transients & How to eliminate them from Power System?

February 13th, 2013 | 3 Comments | Posted in Electrical distribution
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What are Transients 1

As per the classic definition is concerned, an instantaneous change in the state leading to a burst of energy for a limited time is termed as a transient event. The causes can be both external and internal, with the aftermath being sequential and affecting the other parts too.

As per classification, we have the impulsive and oscillatory transients. There is a further 3 tier subdivision of impulsive and oscillatory transients.

In terms of response, impulsive would elevate in a period of 0.1ms and sustain till 1ms. On the other hand, oscillatory could have a frequency surge up to 5 KHz. One main analytical division is calculating these transients for benchmarking and trouble-shooting purposes.


Convergence of networks within Building: At last!

November 20th, 2012 | 3 Comments | Posted in Energy Efficiency - building
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It seems that convergence of networks within Building is taking a decisive turning point. A strong trend that aligns on a single model the different functions of communication, technical management and security. Hence opportunities of interaction between devices. Electrical equipment are directly concerned.






Focus on electricity consumption of control panel components

July 27th, 2011 | 7 Comments | Posted in Energy Efficiency - building
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This security control relay Wieland Electric consumes less energy than a standard equivalent component. Samos PRO control relay has a CPU and can manage 96 safety inputs and 48 safety outputs.

Ignored for a long time, the electricity consumption of equipments and panel automation has begun to interest manufacturers and some contractors. Until now, the few Watts lost in thermal heating by a circuit breaker or an automat had been going almost unnoticed in a world without energy balance.

Today, manufacturers attitudes are changing and their R&D teams are working on this subject. The low-energy impact intrinsic to the equipment sometimes also becomes a sales argument. (more…)

7/8 – Electrical equipment: harmonic mitigation

February 11th, 2010 | 6 Comments | Posted in Power quality
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How to achieve “harmonic mitigation” ?

Several different solutions are proposed for Harmonic mitigation. The right choice is always dependent on a variety of factors, such as the activity sector, the applicable standards, the power level …. Several solutions are relative to Variable Speed Drives, as this type of electrical equipment represents a large part of the installed power in industrial installations and the most significant power harmonic current generators.


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