Answer / Roushan Kumar Tiwary

To handle the high inertia of your 630kW screw compressor, you may need to use soft-start contactors or variable frequency drives (VFDs) that reduce the initial current and torque during start-up. For selecting appropriate contactors, consult the manufacturer's catalog for products suitable for your specific power rating and voltage (400VAC). You can also consider seeking advice from an electrical engineer.

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