Brian,
Can you tell from the tag if the motors in my CF731 are S1 or S6?
The tag on the CF731 says 3kw but the motors say 2kw.
Joe in New Orleans
toggle quoted message
Show quoted text
On Aug 17, 2020, at 12:45 PM, Brian Lamb <blamb11@...> wrote:
?I¡¯m not sure what you mean by ¡°no it is not¡±, a marketing gimmick? If so, yes it is. They get to call the motor a larger hp than it can provide running full load S1. If you dig into the actual motor specs, which I did years ago (2001 when I got my machines) you will find that the diameter and lengths of the motor are different depending upon the rating. The S6 3kw motors I got were actually only 2.2kw S1 motors.
In actuality Felder should be supplying S7 motors and not S6, as they allow for more frequent starts and stops.
Brian Lamb
blamb11@...
www.lambtoolworks.com
On Aug 17, 2020, at 10:05 AM, Jonathan Martens <jonathan@...> wrote:
On 17-8-2020 16:49, Brian Lamb wrote:
3hp is 3hp, doesn¡¯t matter if it¡¯s a single or three phase motor. If the specs say the same CFM is accomplished, then the specs are most likely wrong, or they are using the same exact impeller and housing and the 4hp motor is essentially over kill for the application. Don¡¯t forget, Felder uses the S1 and S6 motor specifications, so hp is a relative term depending upon the rating of the motor¡. the S1 3hp motor is the same as a S6 4hp motor. It is a marketing gimmick.
No it is not. It has to do with duty cycles and periods under load and reaching thermal equilibrium.
S1 means continuous duty under load, S6 means continuous operation with periodic duty, which means the difference between S1 and S6 is that in the latter situation the motor runs at no-load, without actual stopping for a while in between periods of use.
See for illustrative diagrams and explanation:
Regards,
Jonathan
