Two modes of Operations & Selectivity :
Fuse-links are available for
Quick Action & Delayed Action. Delayed
action fuse links are selective in ration 1:2 with all fuse links
complying with the requirements for the
operating class gG, no matter which system
is involved. While in
Quick Action fuse links it is not possible to
specify a relationship since these fuses conforms solely to VDE 0635, IEC 241
where l-t curves have not been established upto
the higher short circuit current Level.
4. Time Current Range : gG to IEC - 269 - 2, 269
5. Non-interchangeability : The bases are provided
with gauge pieces which do not accommodate the
insertion of a higher rated fuse link. Thereby higher rated fuse
links cannot be used by mistake. These
gauge pieces can be fitted with the help of
a special spanner.
6. Colour Coding :
The gauge pieces and fuse
link trip indicators for different current
ratings are colour coded as per Indian and International standards.
Thereby fuses can be correctly replaced even
when the blown out fuses are lost.
7. Locking / Sealing Holes :
Three holes are provided in
the fuse carrier. The motion of the fuse
carriers in the opening direction can be restrained by passing a wire
through these holes and sealing the wire.
8. Access from a distance : The fuse carriers are so
designed that they can be inserted or withdrawn
with the use of a long stick fitted with a special adaptor.
Thereby one can have an access
9. Quick Replacement :
The downtime during
replacement is minimum in these fuses and no
hand tools or special pullers are needed for replacement of fuse links