EFC11 3x380-480V 50/60Hz IP55

Stand-alone variable frequency drive for fixed-speed pumps for all applications requiring variable speed, especially in the heating, air conditioning and pressure-boosting sectors.

Special features/Product advantages

• Compact design with energy-optimized cooling concept to minimize heat losses
• Integrated harmonic reduction and additional function for energy-optimized operation in the partial load range of the pump
• Versatile possibilities for use in pump applications thanks to several connection options and different control modes
• Easy commissioning thanks to intuitive assistant with graphical user interface

Functions

• Full motor protection with PTC sensor evaluation
• Emergency operation with reduced speed in the event of excessive temperature, undervoltage or malfunction of a mains phase
• Mains phase failure monitoring
• Real time clock for time-based control
• Separate counters for variable frequency drive and motor operating hours, kWh counter, fault message memory
• Integrated electronic operating data diary
• Standard cascade regulator, dry-running protection, protection against low or no flow rate
• Standby function
• 4 internal PID controllers
• Smart Logic function with 10 action options for simple drive tasks
• PM motor and synchronous reluctance motors can be operated using a device

Connections

Inputs 2x analogue, 0-10 V / 0-20 mA switchable, scalable and invertible 4x digital, 24 V, selectable logic H- or L-active, programmable

Outputs 1x analogue, 0-10 V / 4-20 mA, programmable and scalable

Terminal 2x digital, 24 V, logic can be used selectively as input or output.

Relay 1x 240 V AC, both relays potential-free, programmable and/or 1x 400 V AC drop-out delayed

Auxiliary voltage 1x 10 V DC, for setpoint potentiometer 1 kΩ and motor protection PTC thermistor 2x 24 V DC, for wiring the digital inputs and for supplying active signal transmitters for the actual value

Communication Modbus

Options

• External communication via module (optional): Profibus, DeviceNet, ProfiNet, Ethernet, Modbus, DU/DT filter, sine filter

Scope of delivery

• Stand-alone variable frequency drive
• Installation and operating instructions