Abstract: A multi-pump control system with a control module, a processing module, communication interface, and a storage module. The system is configured to change a number n of running pumps, and receive a signal indicative of a power consumption P and information about a speed ? of one of the n running pumps before and after two different changes of the number n of running pumps. The system is configured to determine, before and after at least two different changes of the number n of running pumps, without a measurement of a differential pressure ?p and of a flow Q, two approximated pump characteristics Pn and ?{tilde over (p)}n, wherein each of the approximated pump characteristics Pn and ?{tilde over (p)}n is unambiguously defined by a pair of parameters (?1, ?2; ?3, ?4). The system is configured to store the pair of parameters (?1, ?2; ?3, ?4) for each of the determined approximated pump characteristics Pn and ?{tilde over (p)}n.

Abstract: A multi-pump control system with a control module, a processing module, communication interface, and a storage module. The system is configured to change a number n of running pumps, and receive a signal indicative of a power consumption P and information about a speed ? of one of the n running pumps before and after two different changes of the number n of running pumps. The system is configured to determine, before and after at least two different changes of the number n of running pumps, without a measurement of a differential pressure ?p and of a flow Q, two approximated pump characteristics Pn and ?{tilde over (p)}n, wherein each of the approximated pump characteristics Pn and ?{tilde over (p)}n is unambiguously defined by a pair of parameters (?1, ?2; ?3, ?4). The system is configured to store the pair of parameters (?1, ?2; ?3, ?4) for each of the determined approximated pump characteristics Pn and ?{tilde over (p)}n.