The amount of water used by users often changes, so the situation of insufficient water supply or excess water supply occurs from time to time. The imbalance between water and water supply is mainly reflected in the pressure of the water supply, that is, there is more water and less water supply, then the pressure is low; if there is less water and more water is supplied, the pressure is greater. Keeping the pressure of water supply constant can maintain a balance between water supply and water use, that is, when there is a large amount of water, the water supply is also large, and when the water supply is low, the water supply is also small, thereby improving the quality of the water supply.
Constant pressure water supply system is very important for some industries or special users. In some production processes, if the tap water supply is not pressurized for a short time or water is cut off for a short time, it may affect the quality of the product. In severe cases, the product will be scrapped and the equipment will be damaged. In the event of a fire, if the water supply pressure is insufficient or is not supplied with water, rapid fire extinguishing may occur, which may cause major economic losses and casualties. Therefore, the use of constant pressure water supply system has great economic and social significance.
Inverter constant pressure water supply system basically uses two methods, one is that each pump is equipped with a frequency converter; the other is that all pumps are equipped with a frequency converter. The latter method has low cost, complicated control procedures, and special requirements for frequency converters. It is the development direction of constant pressure water supply.
For iP5A series inverters, the inverter automatically turns on the auxiliary motor when the control of one main motor fails to meet the increased load to reduce the flow rate or the flow pressure. Up to four auxiliary motors can be used in the iP5A standard configuration, and seven motors can be connected in the option card configuration.
For iP5A series inverters, the inverter automatically turns on the auxiliary motor when the control of one main motor fails to meet the increased load to reduce the flow rate or the flow pressure. Up to four auxiliary motors can be used in the iP5A standard configuration, and seven motors can be connected in the option card configuration.
One inverter can control more than one motor. If the flow or pressure exceeds or falls below the set value, the main motor will not be able to meet its own power, and the auxiliary motor will be automatically turned on or off.
In order to keep the same time for each motor and prevent premature motor damage, the automatic switching function can be used to automatically switch the order of running motors.
Parameter APP-66: When the automatic switching mode selection setting mode is '1', only the auxiliary motor participates in the automatic switching; when the setting mode is '2', all the motors participate in the automatic switching including the main motor.
