VSD-LB/LC for digital, stepless power control of one-pump and multi-pump systems in water supply, heating, air conditioning and ventilation applications.

The frequency converter in the panel adjusts the number of revolutions depending on the load of the pump that controls. The pressure sensor connected to the installation senses the pressure on the installation and transmits it as a 4-20mA signal to the panel. The control system (PLC) keeps the set pressure value in the system constant at the set pressure value.

If the required flow rate is not provided by the working pumps, the other pumps enter the circuit starting from the most powerful one. If there is less need, starting from the oldest, the pumps are deactivated and fixed at the system setpoint.

Properties:

• Lockable main switch

• Touchscreen

• Auto test

• External On/Off

• General operation/General fault signals

• Automatic pump change if there is a failure

• Pump actuation and delay times

• Individual operation/Individual fault signals

• Resetting the pump operating time

• System working hours

• Manual operation switch in if there is a PLC failure (Manual-0-Automatic switch)

• If there is a drive failure automatic operation of the system with the bypass contactor

• Preventing dry run with level float

• PID control

• In "LB" mode, the frequency converter can activate and deactivate the pumps.

If requested, the auxiliary pump enters and exits the network.

• The average value of the pump can be seen on the screen by entering the pump value

• PTC relay at 18.5 kW and above (Optional for power below 18.5 kW)

• Protection class IP54

• Phase protection relay

• Modbus

VSD CONTROL PANELS

Control and Signal Functions

• Start/stop with external potential-free contact

• SSM general fault signal

• SBM general operation signal

• Individual error signal for each pump

• Individual operation signal for each pump