It there any standards or specs. for the silica gel used in the transformer breather ( ranges 2.5-5 MVA)
such as size (in mm or mesh), shape ( spherical , ... ), water absorption capacity , loss on drying , ...
There are many products/manufacturers of blue indication silica gel. Which one...
We have a 25 MVA - 66/11KV ONAF transformer which has been working for more than 20 years
Now we have to operate the transformer at around 14 MVA ( 56% )only to avoid over temp. trips
My question here is :
1) How to make an assessment for the current status of the transformer and estimate the...
Dear All ,
1) What is the maximum acceptable earth (ground) resistance for intrinsically safe IS instruments
and for non intrinsically safe instruments NIS??
2) what is the maximum earth resistance for grounding a PLC and DCS sytems according to standards ?
as i know that for other electrical...
Dear All ,
1) What is the maximum acceptable earth (ground) resistance for intrinsically safe IS instruments
and for non intrinsically safe instruments NIS??
2) what is the maximum earth resistance for grounding a PLC and DCS sytems according to standards ?
as i know that for other electrical...
Dear all,
Please provide help in these questions ?
What is the reason of earthing the armour?
What is the use of metallic screen in HV & MV cables,and why it is earthed & why not used in lv cables?
What is the use of conductor screen (placed directly over the conductor) & (insulation screen...
Hello Every Body ,
I'm facing a situation of too much motor starts per day for For Siemens LV Motor, 75 KW , 3000 rpm , 400V on an Air Compressor Application ..
What is the minimum allowed time between DOL motor starts ( or the mumber of starts per day) to protect the motor and the contactor...
For me , I know that the function of the oil Transformer Breather is to prevent water vapour from entering inside the Transformer by using silica gel & prevent dust or soild particles from entering by using some transformer oil in the Breather cup ..
In my case I noticed that the oil level...
On a special EX canned pump Motor ,
I Found some data on the motor's name plate which is
not clear for me such as :
PN = 50 & tE = 12 s
Any body knows the meaning of these ratings ?
Thank you for you help ,
