EF3 Fuse as a Class-T Alternative?

[Nightguest]

I'm curious as to what those who have more knowledge on this matter would think about this.

I recently came across an interesting fuse type, the Adler EF3
Link with spec sheet: https://www.adlerelectric.com/products/detail/264

Until now, I've always been using Class-T fuses in my system, however, looking at this fuse, am I right in thinking that it could be a viable alternative?

From what I can see (and looking at the 150A version of the EF3 fuse, the breaking capacity is good (50kA@200Vdc).
However, it's the time-current curve that leaves me wondering if it is a viable alternative.

I'm basing my comparison on the info from the datasheet for the Littelfuse Class-T fuses
Link with spec sheet here: https://www.littelfuse.com/products/fuses/industrial-power-fuses/class-t-fuses/jlln.aspx

Looking at the time-current curve, my brain feels like it short circuits, so it would be awesome if anyone could either confirm or correct me.

Am I correct in concluding that at lower overload currents, for example, 500A, the EF3 fuse would be a tiny bit slower than the Class-T Fuse?
With the class T being around 0.2s and the EF3 being around 1.7s
*Strangely, a 150A Bluesea system Class-T fuse shows 0.02 to 0.1s trip time which further confuses me.
Context here: https://www.bluesea.com/products/5114/Fuse_A3T___Class_T_150_Amp

However, we tend to use the Class T fuse as wire protection against a short circuit in the cells, so herein lies my second question.
Given that the short circuit current is crazy level (6000 to 16000A depending on the internal resistance) I'm mostly interested in how long the fuses would take to blow at those currents.

Am I right in understanding that both the EF3 and the T-Class fuse would trip really fast, (quicker than 0.01s) however, the EF3 would likely be slightly "slower" ?

Unfortunately, the T-Class fuse charts end at about 720A@0.01s so I can only "guess" what the time for 6000A would be, however, the EF3 chart seems to indicate around 0.004s to trip for 6000A.

If I am correct:

• Would the difference in trip time be negligible enough, to make the EF3 a safe alternative to the Class-T fuse?
• Is that slight time-to-trip difference going to have any impact?
• Does the fact that the EF3 fuse is much slower at lower overload currents (e.g. 100%) end up being an issue, or can that be ignored as the primary use here is to protect the wires from a short circuit?

A big part of why I'm interested, other than the huge cost difference in the Netherlands (around 50e for Class T vs the 20e for the EF3) is that the EF3 Fuse fits in the Lynx Distributor, and based on the images here (https://lithiumaccus.nl/product/adler-ef3-zekering-200v-dc-ir-tot-50ka/) the fuses are also filled with sand, so they do have that arc protecting feature as well.

Would love to know what the others here think!

 

[Suijkerbuijk]

Hummm.

Yes you can.
But wy ?
Only if you go hyper mode with 100kwh battery pack with a high volts you can go for it .
For normal 12/24v no use
For a 48volts its really over use
Than how easy van you have a replacement or is it easy to order or store.

Than i see you come from the Netherlands.
And yes its more easy than a t-fuses
For usa and the rest not that easy.
Looks like it base on the nh00 fuse

 

[ricardocello]

I've looked at those, they appear to be great.
The EV market has spawned useful fuses.
I could find no standard fuse holders, probably because you bolt them into assemblies.

 

[robbob2112]

Looking at the time/current curves it looks like more than a tiny bit slower....I'm not sure I would use them.

 

[rhino]

As @robbob2112 mentioned you can see that in the charts below. Look at 2000A. For the T fuse it shows it is instantaneous for all of them whereas those EV ones have a slight delay. Since we don't really know how the stuff we have connected will handle that I'd lean towards the safer route.