Altivar 16 AC Drive Specific functions Catching a spinning load Available on: - VW3A16104 - VW3A16201 + VW3A16101 , VW3A16102 or VW3A16104 - VW3A16202 and VW3A16203 , with or without VW3A16101 , VW3A16102 or VW3A16104 Function Smooth restarting of the motor after a short input line undervoltage. When restarted, the output frequency is immediately equal to the reference frequency. The acceleration ramp does not begin at zero. Supply voltage, reference frequency and a direction command (FW or RV) must be maintained for this function to operate.
Applications Machines for which the loss of motor speed is slight during the input line undervoltage (machines with high inertia, process control machines). f t Vn t Automatic restart Available on: - VW3A16104 - VW3A16201 + VW3A16101 , VW3A16102 or VW3A16104 - VW3A16202 with or without VW3A16101 , VW3A16102 or VW3A16104 Function Automatic restart after the drive trips on one of the faults below if the cause of the fault has been corrected. Faults: - Overvoltage (OSF) - Overbraking (ObF) - Overload (OLF) In the case of overvoltage or overbraking, the drive remains disabled for 1 minute and automatically restarts if the fault has disappeared and if the other operating conditions allow.
If the fault remains, the above sequence is repeated 4 times (a maximum of 5 sequences) before the drive faults and has to be reset. In case of motor overload, the drive remains disabled for as long as the thermal state stays above 100%. Restarting is possible if the other operating conditions allow. In each of these three cases, the drive fault relay (SA-SB) remains closed. Supply voltage, reference frequency and a direction command (FW or RV) must be maintained for this function to operate. Applications Machines or installations which run continually or without monitoring, where the restarting does not present any danger for personnel or product (pumps, fans). 29