Vector frequency converter 55 kW, 380 (SPLC-AT20-55G4)

Three-phase frequency inverters SPLC-AT20-55G4 are powered by three-phase voltage 380 V and are designed for controlling three-phase asynchronous motors with a voltage of 380 V and a power of up to 55 kW.

The frequency inverter model of the SPLC-AT20-55G4 series can switch to modes:

• Precise vector control with open loop (sensorless)
• Simple scalar control setup, involving voltage/frequency regulation. This control is less precise but allows the "Pump" mode to operate with higher power motors — 55 kW.

Main parameters of SPLC-AT20-55G4:

• Maximum output frequency up to 600 Hz, resolution for digital frequency setting 0.01 Hz;
• Nominal power supply of the frequency inverter — 3-phase ~380V 50/60 Hz;
• Overload capacity: operation for 60 s with a current overload up to 150%, for 3 s — up to 180%;
• PID regulation with feedback;
• Internal controller (PLC);
• Remote control panel (liquid crystal display, indicators, customizable buttons). By default, the removable operator panel is installed on the device, and for remote connection, an additional order and purchase of a connector is required (not included in the inverter price).

Main features of SPLC-AT20-55G4:

• Possible to use main and auxiliary frequency sources, their synthesis, switch between sources in different ways. Frequency settings possible via:
  • Digital setting with keys on the operator panel in the corresponding menu;
  • Digital setting via UP/DOWN terminals;
  • Digital setup through RS-485 port;
  • Potentiometer connected to the frequency inverter;
  • Multistep speed with 16 preset speeds with duration up to 6500.0 hours, acceleration/braking time for each step;
  • Closed-loop PID regulation with switchable PID parameters;
  • Analogue electrical signal;
  • High-speed pulse signal.
• Maintaining starting frequency up to 100.0 s;
• Motor stop function with DC braking;
• Choice of acceleration/braking time & mode — linear or S-curve;
• Sleep mode with activation periods to prevent water freezing;
• “Jog” mode;
• Protection functions:
  • Menu access protection with password;
  • Motor and inverter overload protection;
  • Module overheat protection;
  • Phase failure detection on input/output;
  • RS-485 response time limit detection;
  • Overvoltage and undervoltage protection;
  • Feedback sensor disconnection detection for PID;
  • Water pressure low/high alert, stopping motor due to water shortage;
  • Display of 25 types of errors.

You can buy a Nietz vector frequency inverter for asynchronous motors with power up to 55 kW SPLC-AT20-55G4 with 3-phase AC380V power supply, with delivery to any region of Ukraine.