waross, exactly the reason why they do not state the transformer rating as 1.6 times, and hence the reason why the protection has to prevent loading of transformer to those levels.
Mbrooke, I am actually not 100% sure on what you mean by 'Not only that, but cyclic loading actually prevents...
If someone sets a transformer overcurrent pickup level to 1.6 times the rating of the transformer, then that person thinks that it is OK to load it up to that level continuously. I can't understand why the transformer manufacturer won't sell such a transformer as a 1.6 times rated transformer!
I have always set my pickup to be 120% of the transformer rating or the maximum load expected. The reason I say maximum load expected is that some times, the transformers are oversized for current loading scenarios and there are some cost savings associated with cable installations if protection...
Hi,
I am planning on using the Harting Han Axial Screw Contact Module (refer http://www.mouser.com/ProductDetail/HARTING/09140022601/?qs=gIpPgrDBK%2Fi%2Ft%2FkKlv1zuw%3D%3D)
I have never seen one and I am not sure if there has to be another part ordered to hold the male and female parts...
Refer MCAG14 relay application guide to calculate the peak voltage during an internal fault. The guide is available from
http://www.gegridsolutions.com/alstomenergy/grid/Global/Grid/Resources/Documents/Automation/HIREFBP/R6136D.pdf
Thank you waross.... The jointing compound has been applied in my case - the key doubt I have is whether it is common practice to have transition plate or bimetal lug in ALL copper to aluminium power cable connections or only in cases when there is a concern of corrosion due to moisture...
Is it a common practice to install bi-metal lugs or transition plates n all cases where there are connections between copper and aluminium elements? Or is there an assessment be made in relation to the environmental conditions the equipment is subject to?
The reason I ask is that I noticed some...
Thank you jghrist for your idea... unfortunately we have already procured the transformer and it is required to operate at full load occasionally. So, you do agree that operating the transformer at an ambient around the transformer exceeding 40 degrees is not strictly in accordance with the...
We have a transformer supplied by a manufacturer which is planned to be installed within a room. The transformer is manufactured to IEC60076 standards.
The question is regarding the ventilation design for the room. IEC60076 states that the cooling air temperature has to be within 40 degrees...
A stupid question: If the point of metering is home, then wouldn't it be the responsibility of the utility to provide the cable to home?
I totally agree with waross, the best option is a transformer. If you do the cost calculations, it may seem comparable between installation of heavy cables vs...
Thank you Scotty, thats a good point. Can you just clarify the second part "I wouldn't rely on containment as part of my designed earth fault path to meet disconnect times.." for my understanding?
