The fastest RCBO in the world

[Energizer]

What is the fastest RCBO you know?
Fastest is meaning it has the lowest trip times.

 

[littlespark]

Do you mean measured time, or design?

I don’t think any are designed less than 40ms… but there are time delayed ones.

Recent eicr was Hager 63A type AC in a dual rcd consumer unit… Tripped at 35 and 39 ms. Just within the 40, but there are other down at 19…. Can’t remember what make, but possibly a brand new fusebox RCBO.

 

[Energizer]

Do you mean measured time, or design?

I mean measured time.
I searched in the datasheet and techical description of the dozens of RCBO - no one word about trip time.

 

[littlespark]

The regulations for final circuits ask for 40ms, or it may just be written as 0.04s

You can get time delayed rcd/RCBO which are longer times, but are fitted upstream, protecting a number of circuits.

Domestic installations are only 40 ms.

 

[Energizer]

There is no RCBO without delayed trip? I mean trip time=0, instantaneous trip ?

 

[DPG]

There is no RCBO without delayed trip? I mean trip time=0, instantaneous trip ?

There are non-delay RCDs yes. But there is no such thing as instant - they all take a finite amount of time to trip, even though it may only be a few milliseconds.

 

[Intoelectrics]

There is no RCBO without delayed trip? I mean trip time=0, instantaneous trip ?

There is no such thing as instantaneous cause and effect in the way you are imagining it. Even if the device operated at the speed of light, (around 300,000 Km per second = 186,282 miles per second) it would still take an extremely small amount of time to operate . Albeit, this would be so fast, possibly immeasurable, so for all intent purposes as close to your instantaneous as you could get.

Even at this high speed the sun's light doesn't reach Earth until around 8.3 minutes after it was initially propagated, and the nearest star to ours, just over 4 years!

But things start to get even more mind boggling when you delve into Albert Einstein's relativity which describes the relationship between space, time, speed and measurements.

 

[littlespark]

There is no such thing as instantaneous cause and effect in the way you are imagining it. Even if the device operated at the speed of light, (around 300,000 Km per second = 186,282 miles per second) it would still take an extremely small amount of time to operate . Albeit, this would be so fast, possibly immeasurable, so for all intent purposes as close to your instantaneous as you could get.

Even at this high speed the sun's light doesn't reach Earth until around 8.3 minutes after it was initially propagated, and the nearest star to ours, just over 4 years!

But things start to get even more mind boggling when you delve into Albert Einstein's relativity which describes the relationship between space, time, speed and measurements.

Alright, Spock…. It’s too early in the morning.


You do get time delayed protection that may cover several circuits, but each of these final circuits have the 40ms limit.
A large enough fault will of course trip a time delayed much faster.

 

[Intoelectrics]

Alright, Spock…. It’s too early in the morning

I'm a member of a few science forums, its a passion of mine. So my apologies, I just find it so fascinating and just wanted to share with bore you all.

 

[Rockingit]

The question has to be...... why the question? What is it that you're wanting to do that requires a really fast disconnect time?