Frequency conversion and constant-pressure pump

タイトルまたは説明

This series inverter is designed for water supply at constant pressure. It can switch to as many as 7 pumps, each of them enjoying free manual or automatic control with no influence on the other pumps working. The total number of pumps to be switched to can be set from the keypad program, with setting value of **4 for multi-pump circulation frequency conversion. Instantaneous impact on value while being switched between pumps can be avoided through special processing. All the individual pumps can operate under even load through logic arrangement incase a certain pump may risk erosion due to long idling.

Technical data for VFD-W Inverter
Input power:
Rated voltage: *-phase **0v
Rated frequency: *0/*0Hz
Output:
Control mode: Voltage vector control
Rated voltage: *-phase ****0V
Frequency range: 1.*****0.*0Hz
V/F compensation: Curves to be set between **8
Overload capacity: **0% (rated current), 1 minute
Operation Functions:
Frequency setting: Keypad and external analogue signal (**5V, ***0V, ***0MA)
On/Off control: Passive contact control or keypad control
Speed up/down time: 0.*****0s (to reach the change time for *0Hz)
Protection: Under-voltage, Out phase, Over-voltage, Over-current, Overload, Overheat.
Conditions:
Equipment location: No tangy active gases or dust
Ambient temperature: *****0
Ambient humidity: Below *0% (no bead coagulation)
Vibration intensity: Below 0.5G
Matched Motor: 1.5KW***0KW

Typical functions for VFD-W inverter:
Built-in PID adjuster and positive/negative feedback control.
Presetting for pressure or flow.
Constant pressure control and constant flow control.
Logic unit for circulating inverting and fixed inverting control.
Dynamical display for the value of the controlled parameters.
In-between relay control unit for system configuration.
Pump control function for fire fighting.
Timing control of water supply.