I have seen some discussions on Pumps Lead/Lag control before. However, I am a novice progammer and am a bit confused. I have to program three pumps such that all three pumps can operate at the same time, or just one pump or two pumps, based on a Tank's Liquid Start and Stop levels.
Say if Pump1 is selected as LEAD, and Pump2 and Pump3 is selected as LAG. The lead pump would kick in immediately, but when would the lag pumps kick in? I guess I am not understanding what Lead and Lag actually means. Does lag actually just mean standby? Or would a lag pump kick in if the discharge pressure is not being met by a single pump?
I know some of my questions above really depends on the client's control philosophy but they are unclear about this aspect. If someone could please explain how lead/lag pumps normally operate that would be great.
Really look forward to hearing responses
Say if Pump1 is selected as LEAD, and Pump2 and Pump3 is selected as LAG. The lead pump would kick in immediately, but when would the lag pumps kick in? I guess I am not understanding what Lead and Lag actually means. Does lag actually just mean standby? Or would a lag pump kick in if the discharge pressure is not being met by a single pump?
I know some of my questions above really depends on the client's control philosophy but they are unclear about this aspect. If someone could please explain how lead/lag pumps normally operate that would be great.
Really look forward to hearing responses