Over current protection. Unit over temperature. overload. Motor stall protection. Motor under load protection. Short-circuit protection of +24V and +10V ref. voltages. Operational Extra Functionality Required: Motor Switch Ride-through: The VFD shall provide trip-free operation when an output switch interrupts power between the VFD and the motor. Ramp Time Optimizer: The VFD automatically increase the deceleration time based on controller overvoltage during deceleration or the acceleration time based on current limit during acceleration. Over Temperature Ride-through: The VFD automatically adjust switching frequency and speed of the motor to adapt to unusual increase in ambient. Power Ride-through: The VFD shall automatically lower motor speed to adapt to sudden voltage drop or power loss. Configurable Automatic Reset: The VFD shall automatically reset allowed faults and keep resetting during the set time period. The VFD shall generate a permanent fault if the number of faults during the time period exceeds the value of the fault parameter. Flux Optimization: The VFD shall automatically optimize the voltage/frequency curve to minimize energy consumption. Flying Start: The VFD shall provide trip-free operation and the ability to get an already spinning fan under control. Automatic Torque Boost: The VFD shall automatically increase initial voltage to start high inertia fans; enabling smooth starts and avoiding trips. Resonance Reduction using Prohibited frequency ranges: The VFD shall be configurable to override up to 3 ranges of critical frequencies for the purpose of minimizing mechanical system resonances. Motor Pre-heat: The VFD shall automatically provide DC current for pre-heating of motor and VFD in stop state, activated by digital input or by heat sink temperature limit. Sleep Mode: The VFD shall automatically disable and enable the run request with the start command remaining on, based on frequency sleep limits.
Over current protection. Unit over temperature. overload. Motor stall protection. Motor under load protection. Short-circuit protection of +24V and +10V ref. voltages. Operational Extra Functionality Required: Motor Switch Ride-through: The VFD shall provide trip-free operation when an output switch interrupts power between the VFD and the motor. Ramp Time Optimizer: The VFD automatically increase the deceleration time based on controller overvoltage during deceleration or the acceleration time based on current limit during acceleration. Over Temperature Ride-through: The VFD automatically adjust switching frequency and speed of the motor to adapt to unusual increase in ambient. Power Ride-through: The VFD shall automatically lower motor speed to adapt to sudden voltage drop or power loss. Configurable Automatic Reset: The VFD shall automatically reset allowed faults and keep resetting during the set time period. The VFD shall generate a permanent fault if the number of faults during the time period exceeds the value of the fault parameter. Flux Optimization: The VFD shall automatically optimize the voltage/frequency curve to minimize energy consumption. Flying Start: The VFD shall provide trip-free operation and the ability to get an already spinning fan under control. Automatic Torque Boost: The VFD shall automatically increase initial voltage to start high inertia fans; enabling smooth starts and avoiding trips. Resonance Reduction using Prohibited frequency ranges: The VFD shall be configurable to override up to 3 ranges of critical frequencies for the purpose of minimizing mechanical system resonances. Motor Pre-heat: The VFD shall automatically provide DC current for pre-heating of motor and VFD in stop state, activated by digital input or by heat sink temperature limit. Sleep Mode: The VFD shall automatically disable and enable the run request with the start command remaining on, based on frequency sleep limits.