Fuse Loss Relays ???

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southern view energy

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I have a job that I am quoting and it is requiring that I replace existing fuse loss relays in existing switchgear. The specs require replacement of one 3000 amp main and (2) 1600 amp mains. I have never dealt with these items. I can assume that they are used to protect the system by disconnecting two existing phases if one phase happens to trip. The other issue is that the switchgear is old federal pacific equipment. Do I need relays that match this. My local supply houses are clueless as well.

My question is does anyone know if these items are brand specific, approximate values of the items and difficulty to change out.

Any information on these items would be helpful to educate myself.

Thanks.

Scott
 
southern view energy said:
I have a job that I am quoting and it is requiring that I replace existing fuse loss relays in existing switchgear. The specs require replacement of one 3000 amp main and (2) 1600 amp mains. I have never dealt with these items. I can assume that they are used to protect the system by disconnecting two existing phases if one phase happens to trip. The other issue is that the switchgear is old federal pacific equipment. Do I need relays that match this. My local supply houses are clueless as well.

My question is does anyone know if these items are brand specific, approximate values of the items and difficulty to change out.

Any information on these items would be helpful to educate myself.

Thanks.

Scott
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Sounds like they are talking about the blown fuse trip devices in a fused breaker. Some breakers have fuses in line to allow for higher fault interuption but a blown fuse would single phase the loads, the blown fuse trip device will trip the breaker when 1 phase fuse blows. On FP breakers this is usually designated by a "HL" in the breaker type.

That is my best guess based on the info provided so far, but will need some better info and photos to know for sure.

Whatever you need for this I will have it.
 
Could also be a fused disconnect using a BPS with pinned fuses that go to microswitches, which are monitored by a relay that activates a shunt trip on the switch. There are a lot of ways to skin that cat.

But in answer to your main issue, it's doubtful that you have to replace what's there with exactly the same thing, you just need something that works. Still, whatever it is Zog probably has it... ;)
 
Not sure if I have seen a bolted pressure switch made by FP, hence the breaker assumption. You ever seen one? I will have to look around and see if I even have any of those, if they exist they must be rare birds.
 
zog said:
Not sure if I have seen a bolted pressure switch made by FP, hence the breaker assumption. You ever seen one? I will have to look around and see if I even have any of those, if they exist they must be rare birds.
Click to expand...

Pringle relabled.
 
I am looking for my catalog but several companies make these devices try a search for type KAZ fuses these are in parallel with your main fuse and as noted in the blown fuse device if you lose a 4000 amp fuse this KAZ will blow activate a micro switch which either directly or through a relay trips the main, If I find my catalog I'll post back. KAZ's blow at 27 amps NOT THAT THAT MATTERS, but just a tidbit I have stuck in my brain.

Try your local Bolt Switch rep or call Taylor Phase Guard.

Here you go

http://www.boltswitch.com/products.html
 
A lot of people confuse Federal Pioneer Electric with Federal Pacific Electric because they both say FPE on them, I just assume when they say "Federal Pacific" in a context not relating to residential gear they could mean either one. Federal Pioneer sold BPS's (maybe the new Schneider version still does?)
 
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