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Hitachi EMC Recommendations
Appendix C
C–6
Hitachi EMC Recommendations
WARNING: This equipment should be installed, adjusted, and serviced by qualified
personal familiar with construction and operation of the equipment and the hazards
involved. Failure to observe this precaution could result in bodily injury.
Use the following checklist to ensure the inverter is within proper operating ranges and
conditions.
1. The power supply to L100 inverters must meet these specifications:
• Voltage fluctuation ±10% or less
• Voltage imbalance ±3% or less
• Frequency variation ±4% or less
• Voltage distortion THD = 10% or less
2. Installation measure:
• Use a filter designed for L100 inverter.
3. Wiring:
• Shielded wire (screened cable) is required for motor wiring, and the length must
be less than 50 meters.
• The carrier frequency setting must be less than 5 kHz to satisfy EMC require-
ments.
• Separate the power input and motor wiring from the signal/process circuit wiring.
4. Environmental conditions—when using a filter, follow these guidelines:
• Ambient temperature: –10 to 40 °C
• Humidity: 20 to 90% RH (non-condensing)
• Vibration: 5.9 m/sec
2
(0.6 G) 10 ~ 55Hz
• Location: 1000 meters or less altitude, indoors (no corrosive gas or dust)