Thanks for sharing so in DC system relay will trip based on the change in voltage? And this relay functions differently from ac? Like in ac its induction but DC can not produce any induction. I am sorry for the basic stupid doubts but pls answer
Centre point of Battery Bank itself is not earthed. If you measure the voltage of positive terminal w.r.to Earth and negative terminal w.r.to earth under the condition battery is not connected with battery charger you would not get any voltage as there is no reference. Whenever battery Bank is connected to battery charger then only you will get equal half voltage w.r.to earthed. This is done mainly two reason one is to decrease the potential w.r.to earthed and another is it gives a returned path for earthed fault detection it may be positive to earth fault or it may be negative to earth fault.
Thanks for sharing so in DC system relay will trip based on the change in voltage? And this relay functions differently from ac? Like in ac its induction but DC can not produce any induction. I am sorry for the basic stupid doubts but pls answer
friend.. why kept center point earthed at DC earth fault supervision relay....
Centre point of Battery Bank itself is not earthed. If you measure the voltage of positive terminal w.r.to Earth and negative terminal w.r.to earth under the condition battery is not connected with battery charger you would not get any voltage as there is no reference. Whenever battery Bank is connected to battery charger then only you will get equal half voltage w.r.to earthed. This is done mainly two reason one is to decrease the potential w.r.to earthed and another is it gives a returned path for earthed fault detection it may be positive to earth fault or it may be negative to earth fault.
How many % of unbalance can consider the positive and negative earth fault ?
How to rectify dc leakage in particular circuit, because everything connected in system showes same positive and negative voltages.
Any method
Still some remains confused
Sir i check 24 voltage DC our substation.i find out that positive to Earth 26voltag and earth to negitive zero potionia what is fault in system.
@@parmodyadav9966 it is negative earth fault
@@relayprotectionelectrical sir I have used vcb Earth That is right or wrong
How charger is grounded to the middle point.. and many more points have not been explained properly..
Please make video in hindi language also.
The centre is earthed, then this explanation is doubtful