Their implementation in the case of convertiblejet pumps Grundfos
As a rule, well pumps, the following ways to reduce the starting currents of pumps: direct integration; inclusion of the method of “star-triangle”, the method including the electric pump through a start-up transformer; smooth start and frequency converter When choosing a method of reducing the starting current should be considered part of the pumping equipment, technical requirements, as well as the rules and regulations of electric service.
The direct inclusion
When actuated, contactor or similar device connected to the network directly. All other things being constant parameters DÖL is the way to start, which occurs in the pump minimum amount of heat and thus have jet pumps up to 45 kW provides maximum durability. However, the electric power greater mechanical load is so high that it is recommended to lower currents.