WARNING!If the drive is connected to multiple motors, use a separate circuit breaker or fusesfor protecting each motor cable and motor against overload. The drive overloadprotection is tuned for the total motor load. It may not trip due to an overload inone motor circuit only.￭ Protecting the motor against thermal overloadAccording to regulations, the motor must be protected against thermal overload and thecurrent must be switched off when overload is detected. The drive includes a motor thermalprotection function that protects the motor and switches off the current when necessary.Depending on a drive parameter value, the function either monitors a calculated temperaturevalue (based on a motor thermal model) or an actual temperature indication given by motortemperature sensors.The motor thermal protection model supports thermal memory retention and speed sensitivity.The user can tune the thermal model further by feeding in additional motor and load data.The most common temperature sensors are:• motor sizes IEC180…225: thermal switch, for example Klixon• motor sizes IEC200…250 and larger: PTC or Pt100.See the firmware manual for more information on the motor thermal protection function.￭ Protecting the drive against ground faultsThe drive is equipped with an internal ground fault protective function to protect the unitagainst ground faults in the motor and motor cable. This function is not a personnel safetyor a fire protection feature. See the firmware manual for more information.Residual current device compatibilityThe drive is suitable to be used with residual current devices of Type B.Note:As standard, the drive contains capacitors connected between the main circuit and theframe. These capacitors and long motor cables increase the ground leakage current andmay cause nuisance faults in residual current devices.￭ Implementing the emergency stop functionYou can order the drive with an emergency stop function.See the appropriate manual for more information.Manual code(English)User’s manualOptioncode3AUA0000119895Emergency stop, stop category 0 (using main contactor/breaker)+Q9513AUA0000119908Emergency stop, stop category 0 (using Safe torque off)+Q963￭ Implementing the Safe Torque Off functionSee chapter The Safe torque off function on page 243.￭ Implementing the Power loss ride-through functionImplement the power-loss ride-through function as follows:78 Guidelines for planning the electrical installation
