Archive for the ‘Electrical distribution’ Category

High Voltage: circuit breaker is the best!

May 23rd, 2010 | 20 Comments | Posted in Electrical distribution
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ringmaster outdoorEvery time I hear or read something about fuses, I’m convinced that15 years ago in the UK, we made the right choice by moving away from fuses to circuit-breakers.

If we take the first argument I read in a previous article, that a fuse-switch is a cost effective solution, this is in fact a myth. In the past it was true due to the physical size of the old circuit-breakers.  Now, compact RMUs with dedicated circuit breakers and self-powered relays have the same life time costs as fuse-switch solutions and have far more useful features.

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High voltage fuse: it’s good if properly used!

May 12th, 2010 | 4 Comments | Posted in Electrical distribution
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A recent article from Lothar presented a bad experience with fuses.

I would like to say that remain a good solution, provided that they are used in a proper way.

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High voltage fuse: it’s rubbish!

April 23rd, 2010 | 38 Comments | Posted in Electrical distribution
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Excuse my words, I am so upset … I give you my story. My name is Lothar Schmitz, I am 39 and my job is Service electrical maintenance Manager. Our main customers are large industrial sites.

We had a shortcircuit in one of our substation of our network: one 10kV fuse melted. A guy of my team quickly reached the site and changed the blown fuse and re energized the feedind circuit …

Medium Voltage Fuses

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UPS protection

December 30th, 2009 | 15 Comments | Posted in Electrical distribution
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Looking for a rule of thumb to design UPS protection network?

is essential nowadays in both commercial and industrial buildings. However, short circuit protection is not that simple matter, at least I think, when using UPS.

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Surge protection devices: how to choose them?

October 20th, 2009 | 5 Comments | Posted in Electrical distribution
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As everyone knows,  devices or surge protective devices (SPD) protect electrical equipment against overvoltages caused by . That said, it is not always easy to distinguish between the various technologies or know which to choose.

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