A
I want to vary flowrate in a loop from 10 lpm to 2500 lpm. For this application I have selected a 22kW and 55kW pump. the pumps are driven by VFDs of same ratings. However for selecting a Electric motor for VFD application, I am not sure of important parameters to be considered. Kindly help me wrt specially following parameter:
i) Rated frequency and tolerance/variation in frequency limit of the motor: I guess the rated frequency should be 50 Hz. However should the variation in frequency be from 50Hz to 13Hz (supposingly I use larger pump motor for flow range of 2500 lpm to 667 lpm). I have seen a specification which says variation in frequency of -5%. So whether it is correct to select the same or not.
ii) Rate voltage and tolerance limit for the motor
iii) Is Speed range a necessary parameter to be considered for selecting motor?
iv) Insulation class: Whether only mentioning Class F insulation is sufficient or some additional features shall be mentioned?
v) Temperature of the winding: Is it important to ask for temperature monitoring?
Kindly answer wrt to above points in addition to any other point which might be important wrt above topic.
i) Rated frequency and tolerance/variation in frequency limit of the motor: I guess the rated frequency should be 50 Hz. However should the variation in frequency be from 50Hz to 13Hz (supposingly I use larger pump motor for flow range of 2500 lpm to 667 lpm). I have seen a specification which says variation in frequency of -5%. So whether it is correct to select the same or not.
ii) Rate voltage and tolerance limit for the motor
iii) Is Speed range a necessary parameter to be considered for selecting motor?
iv) Insulation class: Whether only mentioning Class F insulation is sufficient or some additional features shall be mentioned?
v) Temperature of the winding: Is it important to ask for temperature monitoring?
Kindly answer wrt to above points in addition to any other point which might be important wrt above topic.