supply of air brake direct on line starters with 2 sets of 3 pole contactor, each set control separately by 415 v, 50 hz, ac contactor coils. detail follows as: 01 set of contactor coil is to be controlled by the forward direction of rotation through an inching type push button and the other set through another inching button to control the reverse direction of 5 hp, 3 phase, 50 hz, 415 volt ac motor. there must be electrical inter locking contact to prevent both set of contactors to close simultaneously. each of above push buttons should have one normally closed auxiliary contacts and one stop push button are required. the starter shall be completed with overload, shall be wired and shall be provided with power plug and socket with locking arrangement as shown in schematic diagram drg. no. 1736 / 23 and 1737 / 23, mat. specn. is:8544 ( part-1 ) , is: 13947-4-sec-1 / 1993. each starter is to be provided with 2 nos. power plug & socket 2 ( two ) nos. control plug & socket. maximum dimension 280 mm ( b ) x 360 mm ( l ) x 162 mm ( t ) . make- bch / havells / jeevan / schneider [ warranty period: 12 months after the date of delivery ] senior section engg. / power haryana 15.00 set