Application: Control & protect single phase pump, DOL Model L522 is useful in all cases we need to control and protect duplex pump managing its turn-on and turn-off by
Different electric installations. Our special design makes it a very reliable and sensitive protection against pump dry running without installation of any probe/sensor in the deepwell.
Main Spec: Main Features:
Rated inp t voltage: AC 220V/50HZ, single phase
Rated output power: 0.37KW-2.2KW / 3KW-4KW
Built in function switch: Applied for water supply by liquid level control or booster
Applied for drainage by liquid level control
- Auto/manual switch
- Double pumps control:
Main pump/standby pump automatically alternate
Main pumps/standby pump automatically switch against malfunctions
Standby pump participate running if required
- Starts and stops the pump in accordance with the different liquid level or pressure setting
- Push button calibration
- Automatically stop the pump in the case of water shortage, protecting it from dry running without installing the
Float switch or liquid probe in the well
- Pump accumulative running time displaying
- Pump last five fault record displaying
- LCD displays pump running information
- Protect the pump against over /under voltage; Motor stalled; Over current; Pump shaft rust; Rapid cycle etc
- Grade of protection IP 54
- Visual & Audio alarm for fault prompt
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