Product description:
Square D DS-840 low-voltage AC power circuit breaker; 4000 amp frame, 4000 amp rating plug cat # RP6D40A400. Electrically operated, draw-out, 120 volt AC shunt trip, 120 volt AC spring release, 120 volt AC close circuit, Digitrip RMS 510 cat# S53LS (A) with LS functions. Used electrically OK.
EMSCO #AB-2014-20656 LOC: AB6-N2