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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 / a.ramesh
Why we use DO Fuse in HT Lines?
DO - Means Drop off.
*We do use DO Fuse in HT line for isolating the faulty bit
of Spur line.
What is the purpose of DO Fuse?
*Actually it is called as DOLO. ie., " Drop Off Lift On ".
One end of the fuse wise is tied to Supply end of DOLO unit
and the other end is connected through a stone to delivery
end of DOLO unit with stone hanging. When there is fault in
spur line the fuse wise cuts than because of gravitational
weight of stone the stone tied piece of fuse wire falls
down. there by supply will be isolated. After clearing the
fault the same way the fuse may be provided using 11KV
Hickory Rod with safety gadgets.
*No need for taking Line clear for carrying out maintenance
of this spur line. Remove the fuse, attend the maintenance
with making safety zone, observe safety rules, wearing
safety gadgets after completing the work provide DOLO fuse
restore power supply to the spur line.
*is provided in 11KV Spur lines for isolating spur line
during fault occurs.
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