Vector frequency converter 7.5 kW, 380V (SPLC-AT20-7R5G4)

Three-phase frequency converters SPLC-AT20-7R5G4 are powered by three-phase voltage 380 V and are designed to control three-phase asynchronous motors with voltage of 380 V with a capacity of up to 7.5 kW.

The frequency converter model series SPLC-AT20-7R5G4 can switch to modes:

• Precise vector control with open loop (sensorless)
• Simple scalar control, which involves adjusting the voltage/frequency. This mode is less accurate but allows working with more powerful motors.

Main parameters SPLC-AT20-7R5G4:

• Maximum output frequency up to 600 Hz, resolution for digital frequency setting 0.01 Hz;
• Nominal power supply of frequency converter — 3φ ~380V 50/60 Hz;
• Overload capacity: operation for 60 s with exceeding nominal current 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);
• PID regulation with feedback;
• Internal controller (PLC);
• Remote control panel (liquid crystal display, indicators, customizable keys). By default, the removable operator panel is installed on the device, and for remote connection, it must be additionally ordered and purchased (not included in the frequency converter price).

Main capabilities SPLC-AT20-7R5G4:

• It is possible to use the main and auxiliary source of set frequency, their synthesis, switching between sources in various ways. Frequency settings are possible through:
  • Digital setting keys on the operator's panel in the corresponding menu item;
  • Digital setting via terminals UP/DOWN;
  • Digital setting through port RS-485;
  • Potentiometer connected to the frequency converter;
  • Multistep speed with 16 preset frequency steps with duration up to 6500.0 hours, acceleration/deceleration time for each step;
  • PID regulation in closed loop, with switchable PID parameters;
  • Analogue electric signal;
  • High-speed pulse signal.
• Holding start frequency up to 100.0 s;
• Function for forced stopping of the motor by DC braking;
• Choice of acceleration/deceleration time and mode — linear or S-shaped curve;
• Sleep mode with periods of turning on to prevent water freezing;
• “Jog” mode JOG;
• Protection functions:
  • Password menu access protection;
  • Protection of motor and frequency converter from overload;
  • Protection module from overheating;
  • Detection of phase break on input/output;
  • Detection of response time exceeded on RS-485;
  • Overvoltage and undervoltage protection;
  • Detection of sensor breakage for PID feedback;
  • Water pressure low/high alarms, stopping the motor when water is lacking;
  • Display of 25 types of errors on display.

With us, you can buy a vector frequency converter Nietz for asynchronous motors with a capacity of up to 7.5 kW SPLC-AT20-7R5G4 powered by 3φ AC380V with delivery to any region of Ukraine.