Jeffz
New Member
Hi Will i'm a new member to the form could you [please post a video of how to install a Victron class t fuse holder.
Regards,
Regards,
Victron Class T Fuse Holder
- Thread starter Jeffz
- Start date
WorldwideDave
Solar Addict
I'm not will - but he's here often.
Usually the T-Class fuse is connected to your battery between the positive battery cable and the positive bus bar if you have one or directly to your inverter if it doesn't have one inside already.
Battery Positive --> red cable --> T-Class Fuse Holder w/ fuse --> red cable --> Bus bar or lynx distributor or In or whatever you decide after the t-class fuse.
Usually the T-Class fuse is connected to your battery between the positive battery cable and the positive bus bar if you have one or directly to your inverter if it doesn't have one inside already.
Battery Positive --> red cable --> T-Class Fuse Holder w/ fuse --> red cable --> Bus bar or lynx distributor or In or whatever you decide after the t-class fuse.
You're referring to the Lynx Class-T Power In? https://www.victronenergy.com/dc-distribution-systems/lynx-class-t-power-in
AFAIK Victron doesn't sell a single Class-T fuse holder. If that's what you're looking for, I'd recommend BlueSea https://www.bluesea.com/products/category/16/73/Fuse_Blocks/Class_T_Fuse_Blocks Just make sure to check the size of fuse you need, because Class-T fuses have different physical sizes based on their fusing capacity, so a 100A fuse won't fit in one that can fit a 150A fuse, and vice-versa.
WorldwideDave
Solar Addict
I have blue sea FYI, and I bought the wrong sizes. Twice. Learn from what has been said above.
The T-Class T Power In would be a good solution if you had 2 large batteries and wanted to save some space, but as you only need 1 t-class fuse, not sure I'd go that high end. I love my victron stuff, though.
The T-Class T Power In would be a good solution if you had 2 large batteries and wanted to save some space, but as you only need 1 t-class fuse, not sure I'd go that high end. I love my victron stuff, though.
But we highly support you using a Class-T fuse (on the positive pole, as close to the battery as you can), because it's the best fuse for small to moderate sized battery systems that most of us are using. Most especially lithium battery packs.
Jeffz
New Member
Hello thank's to everyone that repled my battery bank is 92.16 kwh it consists of three server racks of 30.72 kwh each for a total of 18 EG4 lifepower 4 V2 batteries so i need 3 class T fuses one on each server rack that's why i purchased 2 Victron class T fuse holders that will hold 4 class T fuses 2 in each module and 2 Victron power-in modules. I also have 2 EG4 12000xp inverters well that's the run down of my small solar power system.
WorldwideDave
Solar Addict
casually throws that out as I look at my 200Ah 12V system :-(
Wait, 18 of those server rack packs? Really? That's enormous. So you're going to be doing 18 in parallel? Um. I think the general recommendation is each pack in parallel should have it's own Class-T fuse, so that if one pack/cell goes bad with a dead short, it will blow it's fuse and take itself out of the system, and the rest of the packs will be OK.
So that'd be 18 Class-T fuses for all of that. Preferably mounted fairly close to the battery itself.
Maybe there's different advice for those server rack batteries since they have an integrated breaker, I'm happy to be corrected on that.
JeffB1961
New Member
i think i've decided to go with two of the eco-worthy 100 amp 51.2v server rack batteries . do they make class T fuses small enough for each of them ? or should i run the pair into a single 225-250 amp class t fuse ? or is 225-250 adaquate protection for each one ? if a smaller class-T for each is recommend can some link to the fuse ?
thanks , jeff
thanks , jeff
WorldwideDave
Solar Addict
I think the 250A blue sea or Victron is fine for each battery.
Brucey
Velcro Man
These have integrated dc breakers and don't need a class T imo.
WorldwideDave
Solar Addict
Oh boy - doesn't this go against what most people post here?
I think you're saying that the battery, because it has a DC breaker, doesn't itself need a T-class (it doesn't have one inside it), but if connecting this server rack battery to a bus bar, it absolutely should have a T-class fuse? 100 is a lot of amps...that'd be one heck of a fire.
Yeah, I think the recommendation is definitely still have a Class-T, just high enough current that a moderate overcurrent will still be caught by the breaker, but a super high spike will blow the Class-T before the breaker even can detect and respond to the over current. If it even can extinguish the arc fast enough to prevent damage. Or it's even high enough to spot weld it closed and keep it from tripping.
WorldwideDave
Solar Addict
I think you mean the dc breaker seizing up. Not the t-class fuse.
Brucey
Velcro Man
So a Nader 125A breaker has an AIC of 10,000A. Not as good as a class T at 20k or an mnedc250 at 50k but well beyond a megafuse with maybe 2k rating. I use mnedc250s on my batteries that don't have integrated breakers, for the two rack mounts I do rely on the integrated breakers.
Brucey
Velcro Man
Nader DC Circuit Breaker | 48V 125 Amp
Ensure reliable electrical protection with the Nader DC Circuit Breaker rated for 48V and 125 Amps, ideal for safeguarding your off-grid or battery-based solar power systems.
signaturesolar.com
WorldwideDave
Solar Addict
In this situation, you are still using t-class fuse though, yes?
Yes, that's what I meant, the DC breaker getting spot welded closed, so continuing to pass current.
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