D–4

Hitachi EMC Recommendations

Hitachi EMC Recommendations

Appendix D

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 SJ300 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 SJ300 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 requirements.

•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/sec2 (0.6 G) 10 ~ 55Hz, SJ300–004xxx to SJ300–220xxx 2.94 m/sec2 (0.3 G) 10 ~ 55Hz, SJ300–300xxx to SJ300–1500xxx

•Location: 1000 meters or less altitude, indoors (no corrosive gas or dust)