Switchgear

Necessary basic functions and connections of the switchgear

For safe operation of the sewage lifting unit, make sure that the switchgear has these functions and connections. CAUTION! To prevent the switchgear from flooding, install it at a sufficient height.

Functions

• Control of two pumps in alternating operations with forced switching. CAUTION! Prevent parallel operation on the hardware-side and software-side.
• Single pump operation
  During maintenance, the lifting unit can operate with only one pump. Make sure to designate the pump and operate it based on the given operating mode.
• Configurable overload protection
• Direction-of-rotation monitoring
• Adjustable measurement range for different level sensors
• Main switch
• Manual control of pumps
  The pumps can only be switched on if the “Pump ON” level in the collection tank is reached.
• High water alarm
  Make sure to give an alarm signal when the high water level is reached.

Connections

• For each pump:
• Power connection in direct or star-delta activation, depending on the pump
• Winding temperature monitoring using bimetallic strip or PTC sensor (FKT 20.2)
• Moisture probe for the motor compartment monitoring
• Moisture probe for sealing chamber monitoring
• Signal transmitter for the level control device
• Level sensor
• Intrinsically safe electric circuit (depending on local statutory regulations)