Frequency converter operation
- Converter type: Pulse-width modulation
- Min./max. frequency during continuous duty:
- Asynchronous motors: 30 Hz up to rated frequency (50 Hz or 60 Hz)
- Permanent magnet motors: 30 Hz up to the stated maximum frequency as per rating plate
- NOTICE! The maximum frequency may be below 50 Hz!
- Min. switching frequency: 4 kHz
- Max. overvoltage at the terminal board: 1350 V
- Output current at the frequency converter: max. 1.5 times rated current
- Max. overload time: 60 s
- Torque applications: quadratic pump curve or automatic energy optimisation procedure (e.g. VVC+)
- Required speed/torque curves are available on request!
- Observe additional measures with regard to EMC regulations (choice of frequency converter, filters, etc.).
- Do not exceed the rated current or rated speed of the motor.
- It must be possible to connect the motor’s own temperature monitoring (bimetallic strip or PTC sensor).
- If the temperature class is marked as T4/T3, temperature class T3 applies.