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Re: Snap Action Breaker Values for the Motors?
Kevin,
The Globe will catch fire under those circumstances as the varnish melts off the wire in the armature and the short wires feeding the motor go incandesent. As in past years,
<R46> All active Power Distribution Board branch circuits shall be protected from overload with an appropriate value auto resetting Snap Action circuit breaker (from the Kit Of Parts or identical equivalent).
A. Each speed controller branch circuit must be protected by one and only one 20-amp, 30-amp, or 40-amp circuit breaker on the Power Distribution Board. No other electrical load can be connected to the breaker supplying this circuit.
This rule allows teams to use their discretion on electrical design. I have seen teams use 20amp breakers on CIM motors. However the limiting factor is knowing what the stall current on a motor is and designing your system accordingly. Although the stall current on a CIM motor is 129 amps, it rarely should draw that much. Combined with the operating spec of the breaker, 40amp breakers are appropriate in that application. Please review R54 as well so that motor loads are not connected to devices that will be damaged if used together.
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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.
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