Vector frequency converter 250 kW, 380V (SPLC-AT20-250G/280P4)

Three-phase frequency inverters SPLC-AT20-250G/280P4 are powered by three-phase voltage 380 V and are designed to control three-phase asynchronous motors with a voltage of 380 V with a power of up to 250 kW.

The model of frequency inverters series SPLC-AT20-250G/280P4 can switch to modes:

• Precise vector control with open-loop (without sensors)
• Simple scalar control configuration, which involves adjusting voltage/frequency. This control is less precise but allows to enable the "Pump" mode to operate with higher power motors — 280 kW.

Main parameters of SPLC-AT20-250G/280P4:

• 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: operation for 60 s exceeding rated current up to 150%, for 3 s — up to 180% (in “P” mode allowed overload 120% for 60 s, 150% — no more than 3 s);
• PID control with feedback;
• Internal controller (PLC);
• Remote control panel (LCD, indicators, configurable keys). By default, the removable operator panel is installed on the device, and for remote connection, it is necessary to additionally order and purchase a connector (not included in the inverter price).

Main features of SPLC-AT20-250G/280P4:

• Possible to use primary and auxiliary frequency setting source, their synthesis, switch between sources in different ways. Frequency settings possible through:
  • Digital setting by keys on the operator panel in the corresponding menu item;
  • Digital setting via terminal UP/DOWN;
  • Digital setting via port RS-485;
  • Potentiometer connected to the frequency inverter;
  • Multi-step speed with 16 preset rotation frequency settings with duration up to 6500.0 hours, start/stop time for each step;
  • Closed-loop PID regulation, with switchable PID parameters;
  • Analogue electrical signal;
  • High-speed pulse signal.
• Holding start frequency up to 100.0 s;
• Forced motor stopping by DC braking;
• Selection of acceleration/deceleration time and mode — linear or S-shaped curve;
• Sleep mode with activation periods to prevent water freezing;
• “JOG” operation mode;
• Protection functions:
  • Menu access protection with password;
  • Motor and inverter overload protection;
  • Module overheating protection;
  • Phase break detection at input/output;
  • Response time overrun detection over RS-485;
  • Overvoltage and undervoltage protection;
  • Feedback sensor break detection for PID;
  • Water pressure low/high alarm, engine stop for water shortage;
  • Display of 25 types of errors on the screen.

You can buy the Nietz vector frequency inverter for asynchronous motors with a power of up to 250 kW SPLC-AT20-250G/280P-4 with power supply 3ph AC380V with delivery to any region of Ukraine.