In 3 phase with neutral wire system, if the loads on all
phases are equal, there will not be any current flow in
But if the loads on any phase/s are not equal compared to
others, there will be some current flow through neutral.
The current will flow in neutral when circuit have in
unbalanced condition in three phase system.The magnitude of
current & impedance valeu is not same then retern current
flow in neutral wire for circuit comleted.
The single phase system neutral is required for circuit
complete.when circuit comleting then current flow by
In Y- connected load (3 phase)
1) If Ir= Iy=Ib then In=0 (Symetrical /balance)
2) If Ir#Iy#Ib ; then In=x (Unsymetrical/unbalanced)
where; Ir,Iy,Ib &In are phase &Neutral current
respectivelyand also #is is not equal
3)but in case of Single phase looping the avilability of
current will be.
The current always flow from higher potential to lower potential i.e, from phase to neutral(In a single phase circuit).as we know the T/F sec is star connected i.e, neutral wire is grounded in the T/F placing point, so all the current flows from phase through load to neutral(The return current always flows through the neutral for closing the circuit path) hence we cant feel the shock even if we touch the neutral wire because neutral is at ground potential(i.e, current always flows through the low resistance path)
question is current flow in neutral rit.
so we can start from single phase. there is phase and neutral wire and we are connecting this 2 wire across any load ok.
phase wire carries in coming current and neutral wire carrries outgoing current. but when we touch neutral wire we wont get any electrical shock dats why every one have confusion. the answer is current is always flow through low resistance path. neutral wire potential is always zero and it is connected to earth in substation. so while we touching the neutral wire current has 2 path. one is through our body to earth , second one is through neutral wire . our body has some resistance. so obvoiously current wont flow through the resistance path in this case.
I hv a question regarding power factor improvement just
after transformer. I request you to reply me plzz. thank
My friend has a small unit of fabrication. in his factory
the main load is a welding machine, lathe machine, grinding
machine. this load is not continuous type. now our
electricity board has installed 16 KVA, 11000/433 V
transformer for our factory. In the energy meter (trivector
meter) at LV side of transformer, i hv seen power factor
value of 0.15 only when only 3 KW load was flowing. Further
electricity board has suggested to install 4 KVAR capacitor
at LV side after energy meter. Now my question is that if
we permanantly install and switch on 4 KVAR capacitor after
energy meter, during some load on transformer and also
without any load on transformer, wht will be the power
factor shown in energy meter?i dont want to get any penalty
by electricity board, so plz suggest me if i can
permanantly install and switch on the 4 kvar capacitor or
not at LV side of transformer just after energy meter?
Thank you again and awaiting for ur positive reply soon.
in HVDC transmission system ,monopolar link has one
conductor usually a negative polarity and use ground or sea
return ?through negative polarity we could pass electricity
or not yes means how it is possible