Hi All
We are building a 132KV/33KV substation.
The designer has specified the conductor for the grid to be 150mm2 uninsulated multistranded HD copper.
The inevitable supply issues has drawn out the response " we have lots of annealed available lets use that"
we have not done so (we'll wait for...
We have a list of suitable transformers for our job but the vector designation has us scratching our heads.
What does "Dyn11" mean. we assume
"D" = delta primary
"y" = star secondary with nuetral
but what the is "1" or "11"?
knowing we make look a little sheepish but thanks in advance
We have been having a discussion on the relationship of load and power factor in squirrel cage motors. Generally it is agreed that pf. improves as the load approaches 100% BUT nobody can find a graph or curve on paper.
Does anyone know of a site or link with this available.
We have done a bit...
Hi all
A little while ago we talked about batteries and hydrogen and fires. In that thread I said hydrogen fires burnt with a very pale blue to white flame. Aerospace (from memory apologies if not) corrected me that the hydrogen flame is colourless.
Yep I did check, I was wrong and I have...
hi all,
I've been stretching my poor imagination on this one. If you have an inductive device (say a motor) then at the meter
you have a pf of say .8 for the exercise. Now being progressive engineers we realise this is a waste and put in some capacitors next to the meter and get a perfect pf of...
hi all
I am searching for a clue. I have a protocol to interigate a plc via a serial link.
I can prepare the strings and open the com port in turbo basic and get the reply string etc etc.
So the next step was to do this direct from the xcel sheet. And here it all falls over. I can Open...
HI guys
Our work group was working thru the thread on high resistance grounding and trying to figure out how it related to Aussie regs when we realised that we use a technique for cable entry into motors and boxes which does really reduce the frequency of things going snap crackle pop. You may...
I have been reading with interest the discussions on this site and my complements to all. Being from Australia where everbody wants to sell thier electrical goods i see a lot of gear with different voltage frquency etc etc
I think it would be interesting to see how many different systems...
on our site we have a number of PLCs in order to improve the plants performance the introduction of a "supervisory or master computer" (scada) would be ideal.
BUT It seems that these units are outdated (we only purchased the last 2, 3 years ago) and nobody knows much about them.(or...
We have on our site 8 of these plcs and the intention is to provide a supervisory computer (by way of Scada system) looking at plant parameters and "permiting" the operation of each stand alone machine. Other parameters to be included are supply oil temp (and trend) existing machine...
