EC-L-3x12A-MT34-DOL-WM

Switchgear with microcontroller for level-dependent control of three submersible pumps using analogue signal transmitters. Individual parameters are entered via symbol-based menu navigation and an operating knob.

Functions

• Two different operating modes for a broad field of application:
  • “Drain” operating mode: For draining sewage chambers
  • “Fill” operating mode: For filling water tanks and rainwater storage tanks
• Configurable overload protection
• Thermal motor monitoring
• Pump kick function
• Adjustable follow-up time
• Automatic pump alteration
• Service life optimisation
• Standby pump
• Automatic fault-actuated switchover
• Direction of rotation monitoring
• High water alarm with forced switch-on of the connected pumps
• Dry-running protection
• Fault memory for 10 error messages including the type of fault
• Operating mode “Ex” for loading preset values for “Ex” applications (please note information given under “Configuration”!)

Equipment

• Display of the current operating status and data as well as faults, using the LCD display and LEDs
• Symbol-based menu navigation
• Main switch
• Configuration of operating parameters and operation via operating knob
• Remote access via ModBus
• Integrated alarm buzzer

Inputs

• 1x analogue precision input 4 – 20 mA for level control with level sensor
• 3x digital inputs for level control with float switch (max. 2 pumps)
• 1x digital input for low water level with float switch (dry-running protection)
• 1x digital input for high water signal with float switch (high water alarm)
• 3x inputs for thermal winding monitor with bimetallic temperature sensor, connection of PTC sensors is not possible!
• 3x inputs for connecting moisture sensors (e.g.: Motor compartment leakage or sealing chamber monitoring)
• 1x digital input for External On/Off for remote activation and deactivation of automatic mode

Outputs

• 1x potential-free contact* for the collective run signal (SBM)
• 1x potential-free contact* for the collective fault signal (SSM)
• 1x potential-free contact* for the individual run signal (EBM) per pump
• 1x potential-free contact* for the individual fault signal (ESM) per pump
• 1x 24 VDC output for connecting an external alarm signal
• 1x analogue output 0-10 V for the output of the actual level value

*NOTICE: Power supply must be provided by the customer!

Configuration

• Signal transmitter to be provided on-site.
• Switchgears are not protected against explosions and may only be used outside hazardous areas.
• Signal transmitters within hazardous areas must be connected through an intrinsically safe circuit, e.g. Zener barrier or Ex cut-off relay.
• Pumps within hazardous areas can be directly connected.

Notice! Printed installation and operating instructions have been enclosed with the product in the following languages: DE, EN, FR, PL, RU. All language versions have been saved as PDF files on an enclosed USB stick or can be downloaded at https://qr.wilo.com/1401. A notebook or tablet with Adobe Reader is required for installing and commissioning.