Standard Operating Voltages:

• 220V "R" Series: 208-230VAC input

• 460V "RH" Series: 460VAC input

Important Voltage Characteristics:

1. No-Load/Light-Load Conditions:

   • Generated phase output voltage typically exceeds input voltage

   • Expected behavior in unloaded/lightly-loaded operation

2. High Input Voltage Scenarios:

   • "R" Series: Input >230V may cause excessive output voltage

   • "RH" Series: Input >460V may cause excessive output voltage

Critical Application Note:

• CNC/PLC Equipment Sensitivity: Many precision machines may malfunction or refuse to operate at elevated voltages

• Voltage Thresholds:

  • 220V systems: Problems typically occur above 230V input

  • 460V systems: Problems typically occur above 460V input

Recommended Solutions:

1. Voltage Regulation Options:

   • Install buck-boost transformers

   • Consider voltage regulating equipment

2. Load Management:

   • Maintain adequate balanced load

   • Avoid prolonged no-load operation

3. System Monitoring:

   • Install voltage monitoring equipment

   • Implement automatic shutdown for overvoltage conditions

Technical Advisory:
For CNC/PLC applications, we strongly recommend:

• Pre-installation voltage verification

• Load testing before connecting sensitive equipment

• Consultation with equipment manufacturers for voltage tolerance specifications