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Fault 27 in danfoss vacon 20 drive

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(@click2electro)
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Cause : Back EMF protection comes when drive has detected that the magnetized motor is running in start situation. Back EMF refers to the voltage generated by a motor when it rotates. When the motor is decelerating or being turned externally, the motor itself acts as a generator, producing voltage that opposes the current flow in the motor windings.

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