hi ; there
This question was asked by someone:"It turns out that this is normal, so what is the reason for this?"
After doing the repair of the transformer, it was shipped overseas without insulating oil. Prior to that, Insulation resistance tests and Insulation Power Factor test was...
hi there ;
for LV 3pole ACB (without using external ct for Neutral)
1_how the breaker calculate the Neutral current is it the vector sum of L1+L2+L3
and what will be the different of the reading of N if we connect external ct for N.
2_ for ground fault function :
_what is the difference bet...
delta star distribution transformer(11/.38). the neutral of the transformer star is solidly grounded,
if the system is converted to ungrounded system as the neutral grounding is removed ,then what is effect of that during ph to ground fault Specially on single ph loads (220v) line to neutral for...
IN (delta system) how RMU earth fault indicator operates , and what is the function of the used medium voltage cable toroid (only one toroid allaround the 3core cable), does it only measures the surrounding or the sum of magnetic field of the 3 ph or what it actually sensing? and in another...
engine generator set power rating nameplate is
KVA,KW and PF what does this mean ?
what i excepect is that the generator power is rated as KVA only and i can load it with any power factor according to load type ,
but at any nameplate KVA,KW and PF are given ,
the misunderstading here is the...
Why gas bubbles collected in the buchholz relay and don't collect at the transformer conservative tank and goes out from the breather?and when it can escape out from the buchloz relay? (According to physics point of view.)and does the lower float affected by the gas bubbles or it just for hard...
If primary magnetic flux is totally contained within the iron core then how the secondary winding is being linked or cut by the magnetic field without lines of force cutting the windings? specially when the primary and secondary windings are in different limbs,like single phase transformer.
How can we discharge capacitors? I saw a lot of videos where they discharge medium voltage power capacitors by connecting it to ground (meaning touch each terminal lonely by grounding stick) is it true? My question here if capacitors are like batteries,so I can't just discharge a battery by...
There's a 11 kv overhead transmission lines passing under 66 kv overhead transmission lines .What's the best way to get rid of the induced emf while working on the 11kv lines, should the portable local earthing protect us and how? Note that, the 11 kv in that case acting like a transformer...
In medium voltage distribution networks there is a 3 wires coming from substation transformer with Delta secondary connection, and there's a grounding transformer which is used to create a neutral point which we connect it to ground to create a ground path to detect ground faults,now before we...
Where does the Eddy current induced in transformer core laminations? Means in which area, suppose rectangle lamination with length L ,width W and thickness X,? and why? And what's the angle between main magnetic field and the core laminations is it parallel to it or Perpendicular ، then how it...
How transformer core is being grounded although it consists of insulated laminations so how we get a conducting path through all the laminations to ground the core,and does this conducting path affected by edyy current?
