View Single Post
  #75   Spotlight this post!  
Unread 22-08-2014, 14:53
Jon Stratis's Avatar
Jon Stratis Jon Stratis is offline
Electrical/Programming Mentor
FRC #2177 (The Robettes)
Team Role: Mentor
 
Join Date: Feb 2007
Rookie Year: 2006
Location: Minnesota
Posts: 3,738
Jon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond reputeJon Stratis has a reputation beyond repute
Re: 2015 Beta Testing - The Components are Here.

Quote:
Originally Posted by Nate Laverdure View Post
Fine, but aren't we're talking about an application (powering the compressor) where self resetting circuit breakers have been used successfully for some time?
With different hardware, yes. From what I've been told in the past, Vex (the makers of the spike relay) did specific testing with a circuit breaker to validate it as safe before FIRST allowed it to be used for compressors in the rules. That's the only reason teams were allowed to replace the provided fuse with a breaker for use with compressors.

For FRC usage, breakers, in general, are present to protect the wiring, not the components attached to that wiring. For this 20A fuse, it could protect the PCM from over-current if (for example) something gets shorted out... but my guess would be that the fuse is there to prevent the PDP from burning out by drawing too much current from those outputs. It's probably there to protect against a short much more than to protect downstream circuitry.
__________________
2007 - Present: Mentor, 2177 The Robettes
LRI: North Star 2012-2016; Lake Superior 2013-2014; MN State Tournament 2013-2014, 2016; Galileo 2016; Iowa 2017
2015: North Star Regional Volunteer of the Year
2016: Lake Superior WFFA
Reply With Quote