hello, i have two question:
1-How a sf6 circuit breaker can catch the zero current to extinguish an arc ? is there a sensing device or this is a natural consequence of a mechanism designed?
2- is there any application such as parallel operation of ups with utility? i just ask due to curiosity ...
okey got it, i think every country has its own conventional design, as i said autoproducer feeder is the feeder which connects the connection point to the cogen plant, two way energy flow occurs on it...
yes interlocking i mean, is there any interlocking when we talk about cogeneration feed that takes and send the excess power to a M.V or H.V utility.
also i want to learn the technical name of this feeder, for example in my country it is called as "autoproducer feeder"
how i am supposed to work with senior engineers?? i just ask to be able to learn... searched enough but i hope to findanswers here to these simple questions.
There are some questions of cogeneration power plants i need to ask you..
1- How is the feederthat feeds excess energy to or draws energy from the utility named ?
2- ?s there an important locking of circuit breakers on this feeder (I heard but dont know if there is one why?)
3-?s it important...
yes i think this means interharmonics dear magtiger;
Interharmonic components are caused primarily by two
sources:
• Variations of the amplitude and/or phase angle of the
fundamental component and/or of the harmonic
components,for example, inverter drives
• Power electronics circuits with...
as far as i know, it is more difficult to break lagging currents than break resistive currents. is it true? if it is true why? does it matter the lag of the current,?
some say that when a high frequency source gets near to a flourescent lamp it makes the lamp work ,so is it true and if so what is the principle ? magnetic field or electric field or frequency?
so as regards operating rooms, what do standarts say? is it reasonable to feed op.rooms seperately or just via a single big UPS? is there any commonplace idea or standart?
what i cant understand is that if someone needed clean and conditioned power and used ups does it mean this ups will never bust ? i am speaking of the worst case namely busting of one ups(in both cases one of them fails).
so for the loads above you are right, there is no need for dividing the...
if there are 2 40 kva ups and if one of them is gone and the load is 60 kva it means the load will be transferred to the mains,if the load is less than 40 kva it means we can replace the broken ups without interruption,
well what if the single 80 kva ups is gone?? the load will be transferred...
hello, ? have a critical load (8 operations room in hospital) and want to feed this load with 2 40 kVA UPS (parallel operation).Maximum load is 80 kva or so, now what if i do this instead of 1 80 kva ups? ups type is online and if i use 2 x40 kva ups it will cost less and i think this will be...
