Vector frequency converter 3.7 kW, 3F/380V (SPLC-AT20-3R7G4)

The three-phase frequency inverters SPLC-AT20-3R7G4 are powered by three-phase voltage 380 V and are designed to control three-phase asynchronous motors with a voltage of 380 V and power of up to 3.7 kW.

The model of frequency inverters series SPLC-AT20-3R7G4 can switch to modes:

• Precise vector control in open loop (sensorless)
• Simple to set up scalar control, which involves regulating voltage/frequency. This mode is less precise but allows operating with motors of greater power.

Main parameters SPLC-AT20-3R7G4:

• Maximum output frequency up to 600 Hz, resolution for digital frequency setting 0.01 Hz;
• Rated power supply of frequency inverter — 3ph ~380V 50/60 Hz;
• Overload capacity: operates for 60 s exceeding nominal current by up to 150%, for 3 s — up to 180% (in “R” mode overload of 120% is allowed for 60 s, 150% — no more than 3 s);
• Number of inputs-outputs of the frequency inverter:
  • Input terminals: 6 digital multifunctional inputs (two of which are high-speed pulse) and 2 analogue (one 0…20 mA or 0…10 V, the other only 0…10 V);
  • Output terminals: 2 relay outputs, 1 high-speed pulse output (transistor with open collector), 2 analogue outputs (0…20 mA or 0…10 V);
  • RS-485 communication port (Modbus).
• PID control with feedback;
• Internal controller (PLC);
• Remote control panel (LCD, indicators, customizable keys). By default, the removable operator panel is mounted on the device, and for remote connection, it is necessary to additionally order and buy a connector (not included in the frequency inverter's price).

Main capabilities SPLC-AT20-3R7G4::

• Can use the main and auxiliary frequency setting source, their synthesis, and switch between sources in various ways. Possible frequency settings through:
  • Digital setting with keys on the operator panel in the corresponding menu item;
  • Digital setting via terminals UP/DOWN;
  • Digital setting via port RS-485;
  • Potentiometer connected to the frequency inverter;
  • Multistep speed with 16 frequency rotation presets lasting up to 6500.0 hours, acceleration/deceleration time for each step;
  • Closed loop PID control, with switchable PID parameters;
  • Analog electrical signal;
  • High-speed pulse signal.
• Holding the initial frequency up to 100.0 s;
• Function of forced motor stop with DC braking;
• Choice of time and mode of acceleration/deceleration — linear or by S-curve;
• Sleep mode with activation periods to prevent water freezing;
• “JOG” mode;
• Safety functions:
  • Menu access protection with password;
  • Protection of motor, frequency inverter against overload;
  • Protection of the module from overheating;
  • Detection of input/output phase failure;
  • Detection of response time excess over RS-485;
  • Overvoltage and undervoltage protection;
  • PPE sensor break detection for PID feedback;
  • Alarm for low and high water pressure, motor stop when water supply is insufficient;
  • Display of 25 error types.

You can buy the vector frequency inverter Nietz for asynchronous motors with power up to 220 kW SPLC-AT20-3R7G4 with power supply voltage 3ph AC380V with delivery to any region of Ukraine.