I would like to share a problem I face when I have to install a surge protection device type 1 in high power electrical switchboard. I already asked this question on another blog, and I’m trying to get more feedbacks from electrical engineers.
The situation is very “unconfortable” for me as a quality provider, because if a short-circuit of high value happens, though luckily probability is low, it would mean very serious safety risks …
Every time I hear or read something about high voltage fuses, I’m convinced that15 years ago in the UK, we made the right choice by moving away from high voltage 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.
A recent article from Lothar presented a bad experience with fuses.
I would like to say that high voltage fuse remain a good solution, provided that they are used in a proper way.
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 high voltage 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
Looking for a rule of thumb to design UPS protection network?
Uninterruptible power supplies 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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