Dear JBartos,
Tks once more about your atention,
If I eliminate the CC busbar and maintain only the AC busbar, the SPF only changes your position. Recently I was read one very interesting article at MIL, where they shows the impossibility of elimination of SPF's at all. The only good notice is...
Scotty,
Yeah, this a old installation where I have a mission of improve the security of the loads at one CPD.
Some complementar data:
- We have one UPS - 30 kVA - without a by-pass feature.1 ond half Y.O.
- We have another UPS - 15 kVA - with a by-pass feature - 6 months old
- The...
Dear friends,
I woulkd like to thanks a lot about that attention.
I had one idea, and I like to ask if somebody have tried this before, and if this have success, or not.
If I put two rectifiers with regulated output, one for each output of thas ups's that i have mentioned before, then I make...
Dear Scotty,
Tks about you attention !!!!
In this case, I don't need to use a STS. Perfect. The only problem, that I don't have mentioned before is the Upstream UPS don't have a static by-pass ( !!!! ), but the configuration that you have mentioned is possible, due to a downstream UPS have...
Dear Friends
I have a problem today in Brazil, related with a 2 UPS's and we need to make a transfer of load between that equipments in case of fail of one.
In a first moment most of us don't can see any problem, but when you discover of that 2 UPS's are double conversion - not true on line -...
Dears,
I saw only two problems:
1) What can be the bahavior of the fan, in case of a overspeed operation ? Furthermore, what's the type of fan used - Scirocco ? Limit Load ?
2)All rotating machines, electrical or not, have in a project a parameter called "CRITICAL SPEED". This speed...
Hello Friend,
We have a different ways to fix this problem but I recomend, by a better way, one associate between one "time relay with a delay in a de-energization. This equipment, very cheap, can be sold in a different scales of times and may provide other regulations if a half second...
Hello Friend,
We have a different ways to fix this problem but I recomend, by a better way, one associate between one "time relay with a delay in a de-energization. This equipment, very cheap, can be sold in a different scales of times and may provide other regulations if a half second...
