Motor Starter and Drive Sizing for Coolant Pumps
Coolant pump motors on deep hole drilling machines need properly sized starters and drives to operate reliably. A pump that starts and stops frequently under high pressure draws significant current during startup, and the starter must handle this without tripping or welding its contacts. I have seen coolant pump motors fail prematurely because the electrical system was undersized or improperly configured. Motor and Starter Sizing Guidelines The motor full-load current is listed on the motor nameplate, and this is the starting point for sizing the starter and protective devices. I follow standard electrical engineering practice with some specific adjustments for coolant pump applications. ...