Multi-pumps constant pressure control equipment
1. Can be programed multi-pumps working mode, single pump control mode, multi-pump softstart control mode(max. 7 pumps together). Start control mode directly: Each pump can be set circle softstart or direct starting, output is relay can decrease the pressure or softstarter, VFD running control signal is relay's switch volume
2. Can test the VFD's running frequency
3. Auotmatically alternative running time to prolong using life
4. OV, UV, OA alarm function
5. Can set variable frequency and power frequency mode