[PSUBS-MAILIST] Motor Protection

[Jon Wallace via Personal_Submersibles]

 I’ve read in a few places that reversible dc motors should be protected on both positive and negative sides although nobody has provided a clear justification for it.
I’m curious however why ABS insists on circuit breakers.  DC breakers are subject to serious arcing when they trip and need special engineering to “quench” the arc making them expensive relative to fuses.  I’ve watched a number of videos where breakers essentially become one-time use because they didn’t survive the effects of the arcing.  Cartridge fuses melt producing little to no arc in the process.  I get the convenience of just resetting the breaker, but these days Baomain and others offer breaker-like housings that make cutting power and changing fuses very simple.  Is there some other reason breakers are preferred over cartridge type fuses?
Jon  
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