I was asked to test CT's in new substation from breakers itself (OK with me) and from relay room(this is part I don't quite understand why)???
I am not sure if there is such a practice since I haven't seen one in my 10 years of field service. Any thoughts guys?
what winding configuration of generator step-up transformer is most used in North America when generator is connected to LDC feeder?
delta on HV side or delta on LV side?
12kV cable feeds furnace transformer (delta primary) via load break switch and Joslyn vacuum bottle breaker.
We just had another failure of the vacuum bottle. Operator thought all three phases were open (one was not due to failed bottle) and when he closed breaker there was big explosion. One...
I see that some of us are more familiar to mathematical convention. Therefore motor load is described as "consuming WATTS" and "Generating VARs (or consuming negative VARs)". This means power factor is negative and lagging.
Engineers would conviniently say motor load consume both. Power factor...
Hi all:
I need little more info on zig-zag config on Tx winding. I understand it is not uncommon in North America as a secondary winding conn. I need to now why?
My understanding is that it limits SC but how? Is it due to more inductance in winding? What is engineering justification for this...
