Thread: Circuit breakers
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Unread 23-06-2002, 23:29
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#0047 (ChiefDelphi)
  
Join Date: May 2001
Location: Pontiac, MI
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I vote for choice.
Posted by Mike Gray.

Engineer on team HOT from Huron Valley Schools sponsored by GM Milford Proving Ground.

Posted on 8/2/2000 6:09 AM MST


In Reply to: I vote for smokin' motors! posted by Joe Johnson on 8/1/2000 7:50 PM MST:



20A breakers prevent maximum use of the FP and van door motors, and they may not do anything for the motors protected with a positive tempco thermistor (window lift motors). The Globe motor should be protected by a fast-acting 20A breaker.

It's good to have options for several design approaches. I would use a 20A breaker on the Globe motor
if there is potential for stalling. 30A breakers on every other motor.

If a team wants to cripple their machine with an undersized breaker on the FP motors, then they should have that option. At least the machine will continue to play.

I think that two 20A breakers should be provided in the kit. Most teams will use only one of them, some will want three. I see the decision-making as an excellent opportunity to lead students through an interesting, though potentialy frustrating exercise in 'risk assessment'.


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