Job Sheet 2 Vrible Speed Drive Opertion OBJECTIVE To instll nd operte Vrible Speed Drive. PROCEDURE Before proceeding with this job, complete the sfety check list in Appendix B. 1. On the Vrible Speed Drive, mke sure tht the four fult switches re set t O (off) s shown in Figure 10. Fult switches Figure 10. Set the fult switches t the O position. Festo Didctic 37894-20 15
Job Sheet 2 Vrible Speed Drive Opertion 2. Instll the Emergency Stop Sttion nd Vrible Speed Drive s shown in Figure 11. Figure 11. Instlltion of the Emergency Stop Sttion nd Vrible Speed Drive. 3. Instll the Pump Universl Bse on the Pump Bench. Fix the Motor to the Pump Universl Bse s shown in Figure 12, then instll the coupling gurd. In order to prevent thred glling on stinless steel bolts nd nuts, pply thin coting of ntiseize lubricnt on the threds ech time you fix the motor or pump to the bse plte. 16 Festo Didctic 37894-20
Job Sheet 2 Vrible Speed Drive Opertion Figure 12. Instlltion of the Motor nd coupling gurd. 4. By referring to the color of the motor connectors, connect the motor to the outputs U/T1, V/T2, W/T3, nd sfety ground on the Vrible Speed Drive. Refer to the Quick Strt Guide in Appendix C to obtin more informtion bout the Vrible Speed Drive. You should hve red the generl precutions t the beginning of the guide before using the Vrible Speed Drive. 5. Connect the Vrible Speed Drive to the Emergency Stop Sttion. 6. By referring to the viewing nd editing procedures described in the Quick Strt Guide in Appendix C, determine the vlue of the following prmeters (fctory defult vlues) set on the Vrible Speed Drive: Refer to the Prmeter Cross Reference Tble in Appendix C to identify the prmeter numbers. Motor nmeplte voltge: Motor nmeplte frequency: Do the vlues correspond to those shown on the motor nmeplte? Yes No If the prmeters do not correspond to the vlues shown on the motor nmeplte, reset the prmeters to defult vlues s described in Appendix C. In cse of doubt, notify your instructor before continuing. Festo Didctic 37894-20 17
Job Sheet 2 Vrible Speed Drive Opertion 7. Strt (run mode) the Vrible Speed Drive. Mke sure tht there is no key in the motor shft keyset. 8. Determine the vlue of the output current nd output voltge for the output frequency vlues shown in Tble 1. Enter your results in the pproprite cells. If the motor does not strt to rotte, mke sure jumper connects terminls 11 nd 01 on the Vrible Speed Drive. Refer to the Quick Strt Guide to obtin more detils. Tble 1. Output current nd voltge for vrious output frequencies. Output frequency (Hz) 20 40 60 Output current (A) Output voltge (V) 9. Stop the Vrible Speed Drive. 10. Set the mximum frequency the Vrible Speed Drive will output to 40 Hz by setting the mximum frequency prmeter t 40. 11. Check the output frequency setting s follows: Disply the output frequency prmeter. Strt the Vrible Speed Drive. Set the frequency potentiometer t the mximum position. If the displyed frequency is not 40 fter 10 seconds, repet the output frequency setting. 12. Stop the Vrible Speed Drive. 13. Reset the prmeters to defult vlues. 14. Set the time the Vrible Speed Drive will tke to ttin the mximum frequency to 60 seconds by setting the ccelertion time prmeter t 60. 18 Festo Didctic 37894-20
Job Sheet 2 Vrible Speed Drive Opertion 15. Check the ccelertion time setting s follows: Disply the output frequency prmeter. Set the frequency potentiometer t the mximum position. Strt the Vrible Speed Drive while mesuring the time tken to ttin the mximum frequency. If the time is not 60 seconds, repet the ccelertion time setting. 16. If you hve ccess to tchometer, mesure the speed of the motor for the output frequency vlues shown in Tble 2. Tble 2. Motor speed versus vrious output frequencies. Output frequency (Hz) 10 20 30 40 50 60 Speed (r/min) 17. Fmilirize yourself with the direction of rottion control by pressing the pproprite button on the Vrible Speed Drive. Fcing the end of the motor shft, determine if the shft rottes in the clockwise (CW) or counterclockwise (CCW) direction when the Vrible Speed Drive is set t forwrd. Direction of rottion: 18. Stop the Vrible Speed Drive nd invert the cbles t U/T1 nd V/T2 inputs. Strt the Vrible Speed Drive nd observe the direction of the rottion of the motor. Describe wht hppens to the direction of rottion. 19. Ask the instructor to check nd pprove your work. 20. Stop the Vrible Speed Drive nd return the equipment to the storge loction. Nme: Dte: Instructor's pprovl: Festo Didctic 37894-20 19