I have experience in working in ESSAR STEEL plant for around 18 years dealing with control circuits with contactors. I have also dealt with Crane circuits with contactor logic circuits. Additionally I have dealt with Plc's interfaced with contactors in the MCC(Motor control Centers).
The whole plant is run by PLC system interfaced with contactor logics for running of motors for various equipments.
I have worked with Consultants: m/s VA Germany for HBI Plant, m/s GE USA for HSM Plant, m/s Beris, China for Blast Furnace. So I would be able to give you all the international safety aspects built into the design.
Regarding your project I will be providing you with Electrical control and power circuit diagram schematics with bill of material. Design of the panel and cable sizing is not included in my scope.
The time schedule starts after all the details have been submitted or clarified.
The circuit would require more components such as MCB,contactors, Fuses, overload relays. You have not mentioned the safety aspects of the equipments. Emergency stop is for which equipment.
You have to provide the details or your preferences of makes and manufacturer.
The KW rating of the motor has to provided. Timer details are not given.