advantage of D.C. transmission system
- only tow conductor are used for transmission as compared to three conductor in A.C. system. and further it is also possible causing much saving in copper
- the potential stress produced on the insulating by the D.C. system is approximately 70 per cent of the A.C. effective voltage of same value
- inductance, capacitance, phase displacement and surge problems are climinated in D.C. transmission
- no stabilizers are required when transmitting over longer distance
- the economical use of underground cable is possible, since the stress on cable insulating is much less
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