supply of on load changeover switch with front operation handleon load changeover switch with front operation handle,on load changeover switch with front operation handle and enclosure, 63 amp, four pol e, suitable for three phase, 415 volt, 50 hz, ac supply. the change over switch shall be having breaki ng capacity 504 amp, ac-23a, quick make and break, reduced operating torque, deion plates for arc q uenching, handle assembly with door interlocking, and pad locking. the overall specification shall be c onforming to is/iec: 60947: part 2-2016 & part 3-2020 or latest. likely sources:- havells/l&t/c&s/sie mens or equivalent [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitt ed: max 8 lacs ] ]