Derating

Derating refers to the current dependency of the following operating parameters.

  • Operating parameters: Line voltage, clock frequency, ambient temperature
    • The output filters do not require derating beyond that of the inverter if the permitted control modes are observed.
  • Operating parameters: Output frequency

Output frequency

Permissible nominal filter current I/IN

0 – 10 Hz

- without UZ connection at 400 V

- with UZ connection at 400 V

- without UZ connection at 500 V

- with UZ connection at 500 V

 

100%

100%

100%

70% + 1.5% × output frequency

11 – 20 Hz

- without UZ connection at 400 V

- with UZ connection at 400 V

- without UZ connection at 500 V

- with UZ connection at 500 V

 

100%

100%

100%

70% + 1.5% × output frequency

21 – 149 Hz

- with and without UZ connection

 

100%

150 – 250 Hz

- with and without UZ connection

 

100%

Short-time operation without speed derating, e.g., startup

  • Filter current 100% for 5 min every 60 min permitted