ipel Posted November 7, 2011 Report Share Posted November 7, 2011 Hi I have a water well pump being fed from a soft start panel. The motor is around 57kW so I estimate around 102A/phase. But wondering what the feeder pd should be. I'm reckoning on a 160A MCCB @ any helpers please Link to comment Share on other sites More sharing options...
marke Posted November 8, 2011 Report Share Posted November 8, 2011 Hello ipel Th upstream protection MCCB or fuses must be sized to protect the cable used, so determine the cable size and then select the protective device to protect that cable.The motor starter must include protection to protect the motor. This is a separate issue. Best regards,Mark. Mark Empson | administratorSkype Contact = markempson | phone +64 274 363 067LMPForum | Power Factor | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | Pressure Transducers | Smart Relay | GSM Control | Mark Empson Website | AuCom | Soft Starters Link to comment Share on other sites More sharing options...
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