Variable Frequency Drives (VFDs) are among the most important devices in modern industrial automation, responsible for controlling AC motor speed, reducing energy consumption, and enabling soft-start functionality. This guide covers wiring, parameter setup, and fault diagnosis for Schneider Electric Altivar series drives.
Critical Parameters to Configure (Altivar 320)
- bFr (Motor Frequency): Set to motor nameplate frequency (50 Hz in India)
- ACC (Acceleration Ramp): Typically 3–10 seconds
⚠️ Safety WarningAlways wait at least 5 minutes after disconnecting power before opening the drive cover — DC bus capacitors retain dangerous voltage.