FIRE PUMP DISCONNECT

gadfly56

Senior Member
Location
New Jersey
Occupation
Professional Engineer, Fire & Life Safety
Thanks Jim
Based on your comments last sentence, assuming the rotor does NOT break free and the table from "augie47" about tranny overload, is it then a race between the motor and tranny destruction to see which clears the circuit first ?
That's the way I see it. Bring your own popcorn.
 

jim dungar

Moderator
Staff member
Location
Wisconsin
Occupation
PE (Retired) - Power Systems
Thanks Jim
Based on your comments last sentence, assuming the rotor does NOT break free and the table from "augie47" about tranny overload, is it then a race between the motor and tranny destruction to see which clears the circuit first ?
Kind of.
After the motor windings begin to fail it is likely that a short circuit occurs somewhere. A fire pump supply OCPD is not required to carry any short circuit at all.
 
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