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What is the lower frequency range to get the nominal torque in Altivar 12.

The ATV12 have speed range: 1:20 ,for a drive the speed range is the ratio of the output maximum frequency/minimum frequency
where the nominal torque is available.
For a 50Hz motor speed range 1:20 means the Altivar 12 drive is able to provide the nominal torque between 2.5Hz to 50Hz.
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