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why we use DO Fuse in H.T. Line ? What is the purpose of
DO Fuse
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Answer Posted / k.prakashchandra
DOLO cut outs are provided to 11KV/433V tr centers and
sometimes to the 11 KV lines.The cut outs can be opened
,removed & re fixed with the help of hickory rods for
replacement of HT fuses of trs and opening of lines.As
they have renewable fuses ,they provide back-up protection
also.They are just like HT cut-outs and a cheap substitute
for GOS. Earlier they were used for protection to power trs
in sub-stations on 110 or 33KV side when they were called
expulsion type fuses.
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