• Run-Dry protection. This is realized by current change when pumps run dry. 
• Automatic protection and alarm against short-circuit, overload and lack of phase 
• Automatic protection and recovery against under-voltage, over-voltage
• Digital volt-meter / ammeter real-time dynamic display
• Dynamic display of pump-working situations and water level.
• Dynamic light alarm signals of malfunction
• Automatic Patrol. The controllers automatically run pumps for 5 sections if the pumps do not work in two days. This can prevent pumps from seizing because of rust.
• Single-key setting and memory function of protective parameter without adjusting
• Main and stand-by pumps automatically alternate and malfunctions automatically switching 
• Twin pump working on high water level when one pump can handle a large influent.
• HIGH LEVEL ALARM if two pump working together still can not handle the influent. 
• Both sensors and float switches can be used for water level control. 
• Time record for showing working hours for individual pumps. ( this function available for the shipment after September). 
• Voltage-free contactors provided.
• Connecting points provided for remote monitoring lights and alarm. 
• Internally equipped with computer cluster group interface. 
• Integrated design, compact size and light weight, easy installation
• Reliable liquid-level probes provided with no extra charge.
• Lockable steel can be supplied.

Applications:

EP04 and EP06 of twin submersible pump controllers are fully electronic and are totally different from traditional control panels. It can apply to pumping stations for automatic liquid-level control, 240V and 415V, with direct start-up type pumps. It is of all kinds of protections of pump motors. The special design can protect pumps from dry-running without installing water tank (well) probe. 

Specifications:

• Actuation time of overload: 5s - 5min ( Depending on the current)
•  Actuation time of lack phase: <2s
•  Actuation time of short circuit: <0.1s
•  Actuation time of under-Volt: <5s
•  Twin pumps automatically alternate: ratio of frequency alternate: 1:1
•  Actuation time of dry-running protection: 6s 
• Recovery time of overload: 30min
•  Recovery time of dry-running: 30min
•  Liquid-level transfer distance: ≥1000 meters 
• Mode of liquid-level control: pulse electrode probe detect , transfer distance ≥1000 meters 
• Mode of pressure control: pressure gauge with electric contact (/P)
•  Other mode of control: float switch ( at user's option)

Environment Requirement of Installation:

• Input power supply: AC380 - 415V/ 50Hz 
• Operating temperature: -25 ~ 55°C
• Operating humidity: 20 ~ 90%RH, no drips condensed 
• Operating environment : apply to conventional working environment
• Vibration of standard altitude: at 3000 meters below sea level, the vibration is under 0.6G