annual rate contract for the supply of siemens make electrical material for the season, 2020-21 :-switching devices ( contactors & accessories ) , protection devices ( relays & accessories ) , motor starting devices ( dol / star-delta starters ) , timing and monitoring devices ( electronic timers ) , commanding and signalling devices ( push buttons , station , indicating lamps etc . & accessories ) , air circuit breakers , 3wl , accessories for 3wl , 3wt , accessories for 3wt , moulded case circuit breakers ( mccb ) , load break switches , switch disconnector fuse- 3kl , switch disconnector fuse- 3ka , switch disconnector fuse in ss housing- 3kl , rotary switches-3lao , fuses , ( din ) 3na , ( bs ) 3nw , sitor 3ne / 3nc