Current limiting fuses for momentary protection
Current limiting fuses for momentary protection
(OP)
I have several vacuum switches used for cap banks that have recently been found to be over-dutied. The momentary for the switches is 15kA, and currently there is roughly 25kA of fault duty available.
The switches are protected by SMU-20 fuses, which initally was thought to protect the switch. After looking at the TCC curves however, it was discovered it would take between two to three cycles for the fuse to clear. This would likely damage the vacuum switch and cause a safety concern.
I was wondering if it would be feasable to apply a current limiting fuse in this instance? Also, are there any 34.5kV current limiting fuses that would fit this application?
The switches are protected by SMU-20 fuses, which initally was thought to protect the switch. After looking at the TCC curves however, it was discovered it would take between two to three cycles for the fuse to clear. This would likely damage the vacuum switch and cause a safety concern.
I was wondering if it would be feasable to apply a current limiting fuse in this instance? Also, are there any 34.5kV current limiting fuses that would fit this application?






RE: Current limiting fuses for momentary protection
RE: Current limiting fuses for momentary protection
Alan
----
"It's always fun to do the impossible." - Walt Disney
RE: Current limiting fuses for momentary protection
Regards
Marmite
RE: Current limiting fuses for momentary protection
Rafiq Bulsara
http://www.srengineersct.com
RE: Current limiting fuses for momentary protection
RE: Current limiting fuses for momentary protection