Pappion
Retired Engineer Tech
- Joined
- Nov 26, 2020
- Messages
- 559
I can't find these specs on any Class T fuse data sheet. Why should they be ignored or hidden? Is it no worse than a wire?
LET, LMT fuses have a Watt Loss spec. About 20w for 200A thru a 400A fuse. Equates to 0.0005 ohms. Loss seems excessive.
Someone with good equipment could do a 4 wire ohm test on a Class-T fuse.
But that's typically at 100ua. More useful would be 50% current rating, 120 sec soak time, current measured, voltage drop measured, ohms calculated.
I walked away from all that high dollar equipment when I retired.
LET, LMT fuses have a Watt Loss spec. About 20w for 200A thru a 400A fuse. Equates to 0.0005 ohms. Loss seems excessive.
Someone with good equipment could do a 4 wire ohm test on a Class-T fuse.
But that's typically at 100ua. More useful would be 50% current rating, 120 sec soak time, current measured, voltage drop measured, ohms calculated.
I walked away from all that high dollar equipment when I retired.