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Unread 18-12-2006, 07:54
Unsung FIRST Hero
Al Skierkiewicz Al Skierkiewicz is offline
Broadcast Eng/Chief Robot Inspector
AKA: Big Al WFFA 2005
FRC #0111 (WildStang)
Team Role: Engineer
 
Join Date: Jun 2001
Rookie Year: 1996
Location: Wheeling, IL
Posts: 10,770
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Re: Tripping breakers

Quote:
Originally Posted by Cory View Post
The main breaker doesn't actually trip at 120 amps. It can operate at higher current loads for a short period of time without tripping. In the past people have said that number is around 160 amps or so, iirc.
Actually,
for periods under 5 seconds the main breaker will not trip with currents up to 600 amps. As the temperature inside the breaker rises, this over current trip point is reduced. Think about this, four chalupa motors in stall is 129 amps x 4=516 amps and still no main breaker trip. However, the 40 amp breakers would likely be tripping. Since they are auto reset, the effect is erratic motor operation and a loud clicking from the robot.
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Good Luck All. Learn something new, everyday!
Al
WB9UVJ
www.wildstang.org
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Storming the Tower since 1996.

Last edited by Al Skierkiewicz : 18-12-2006 at 07:56.