Over Current Protection of Semiconductor by Fuse
- The fault
current flows through power converter due to short circuit, surge current or
over load condition.
- The semi conductor device may damage due to increase of
temperature due to fault current.
- The
power diodes and SCRs are protected by using fuse in series with supply system.
- The fast acting fuse is used in place of glass fuse generally.
- The SCR is
protected against fault current by using series fuse connection as shown in the
figure B.
Advantages of Fuse Connection in Series With SCR
- There is co – ordination between semi conductor
device and fuse is done.
- Only one SCR is isolated from power converter if there
is fault in single SCR.
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