6DD1683-0BC5 Power Supply Unit

6DD1683-0BC5 Power Supply Unit

6DD1683-0BC5 is set to ensure that when adding pumps, pumps from frequency conversion to industrial frequency process, the same pump frequency conversion operation and industrial frequency operation of the respective corresponding AC contactor will not be simultaneously absorbed and damage the frequency converter, and at the same time, in order to avoid industrial frequency startup startup current is too large and the impact on the grid, so in the permissible range of TMC must be as small as possible.

6DD1683-0BC5 frequency of inverter operation rises with the increase of water consumption in the pipe network. The system uses whether the frequency of inverter operation reaches the upper limit (lower limit) and keeps it for a certain period of time as the basis for judging whether to add or not to add pumps (reduce pumps), and the time of this judgment is TH (TL). If the set value is too large, the system can not quickly respond to changes in water consumption of the network; if the set value is too small, changes in water consumption of the network is likely to cause frequent increase or decrease of the pump action; both cases will affect the quality of constant pressure water supply.

6DD1683-0BC5 adopts the switching mode of “start and stop first”, compared with the mode of “start and stop first”, it can ensure that the pumps are used evenly to prolong the service life of the equipment; at the same time, for the four pumps have been in use for many years, and they need to be regularly overhauled. At the same time for the four pumps used have been used for many years, the need for regular maintenance of the actual situation, increased hardware / software backup function, effectively extending the service life of the equipment; pressure closed-loop control, any change in the system water consumption can make the service pressure of the water supply network to maintain a given, and greatly improve the quality of the water supply; frequency converter failure can still guarantee uninterrupted water supply, while realizing the elimination of faults after the self-starting, with a certain degree of sophistication.