Technical Specifications

FAQ

1. What input power supply is required for this drive?

This drive is designed for a three-phase 400 VAC industrial power supply and supports a 380–480 VAC line-voltage range. The nominal input frequency is 50 Hz, and the rated input current is approximately 199 A at 400 VAC. The incoming power supply should have sufficient capacity for the connected motor and the expected operating load. Proper upstream protection must be selected according to the actual installation, including the appropriate circuit breaker or fuse rating, cable size, grounding arrangement, and applicable electrical regulations. The input terminals must be connected correctly, and the incoming AC supply should never be connected directly to the motor output terminals because doing so can cause severe damage to the drive’s power section.

2. What motor power rating is supported by this drive?

The drive provides a normal-duty rating of 110 kW and a heavy-duty rating of 90 kW, with a continuous output current rating of 205 A. The correct application rating depends not only on the motor’s nominal power but also on the motor’s full-load current and the characteristics of the driven equipment. For applications with high starting torque, frequent acceleration, rapid deceleration, or sustained overload conditions, the heavy-duty rating should be considered instead of selecting the drive only from the motor’s kW value. Motor nameplate voltage, current, frequency, speed, and power factor should be entered accurately during commissioning so that the control system can operate within the appropriate electrical limits.

3. Which motor control modes are available?

The drive supports V/Hz control, sensorless vector control, and vector control. V/Hz control is generally suitable for conventional applications where simple and stable speed control is required. Sensorless vector control provides improved torque and speed regulation without requiring a standard encoder feedback system and is suitable for many industrial applications involving pumps, fans, conveyors, and machinery. Vector control can provide more advanced motor-control performance when dynamic response and speed regulation are important. The appropriate control mode should be selected according to the load characteristics, required low-speed torque, acceleration requirements, and overall process-control objectives.

4. How should the drive be configured for a new motor installation?

Before applying power, verify the motor wiring, grounding, input power connections, and output connections. The motor nameplate information should then be entered into the drive, including rated voltage, rated current, frequency, speed, and other applicable motor data. The selected control method should be appropriate for the application, and the acceleration and deceleration times should initially be set conservatively. For vector-based control, completing the appropriate motor identification or tuning procedure can significantly improve control performance because the drive uses motor characteristics to calculate the required control parameters. After configuration, the motor should first be operated at low speed without an excessive mechanical load while checking motor direction, current, vibration, acceleration behavior, and fault status.

5. What should be checked if an overcurrent fault occurs during acceleration?

An overcurrent fault during acceleration can be caused by several factors, so both the electrical and mechanical systems should be inspected. First, check whether the motor or driven equipment is mechanically blocked, overloaded, or experiencing excessive starting torque. Next, inspect the motor cable for phase-to-phase shorts, ground faults, damaged insulation, loose terminals, or incorrect connections. If the mechanical and wiring conditions are normal, review the acceleration time because an excessively short acceleration period can demand a very high current from the motor and drive. Motor nameplate parameters should also be verified, particularly rated voltage, current, frequency, and speed. If sensorless vector or vector control is being used, the motor tuning procedure and associated control parameters should also be checked. Persistent overcurrent faults after these checks may indicate a problem within the drive’s power or current-detection circuitry.

6. What can cause an overvoltage fault during deceleration?

An overvoltage fault during deceleration is commonly associated with regenerative energy from the motor. When a high-inertia load decelerates, the motor can temporarily operate as a generator and return energy to the drive’s DC bus. If the regenerated energy causes the DC-bus voltage to rise beyond the allowable limit, the drive may initiate an overvoltage protection event. This condition is more likely when the deceleration time is set too short or when the load has significant rotational or mechanical inertia. The first corrective action is normally to increase the deceleration time and observe whether the fault disappears. For applications requiring frequent rapid deceleration, the braking-energy requirements should be evaluated carefully because this configuration does not include an internal braking resistor or brake IGBT. An appropriate external braking or regenerative solution may therefore be required.

7. How can communication faults be diagnosed?

Communication problems should first be separated into a physical-layer problem and a configuration problem. Check that the selected communication module or network interface is correctly installed and that all network cables, connectors, shielding, termination components, and grounding arrangements are suitable for the selected protocol. The network address, baud rate, node configuration, IP settings, and other communication parameters must match the PLC, DCS, or supervisory control system. If the drive is being controlled through DeviceNet, EtherNet/IP, PROFIBUS, Modbus, or another supported network, verify that the controller is using the correct drive data structure and command/status configuration. It is also useful to check whether the drive itself operates correctly from its local control interface. If local operation is normal but network commands fail, the problem is more likely to involve network configuration, communication hardware, or controller-side programming rather than the drive’s main power section.

8. What maintenance is recommended to keep the drive operating reliably?

Regular preventive maintenance is important for a high-power AC drive because dust accumulation, loose electrical connections, excessive temperature, and cooling-system problems can gradually reduce reliability. The installation should be inspected periodically for contamination, abnormal noise, overheating, loose terminals, damaged cables, and signs of component deterioration. Cooling airflow should remain unobstructed, and the cooling fan and heat-dissipation areas should be checked according to the operating environment and maintenance schedule. Electrical connections should be inspected for signs of overheating or looseness, while the drive’s fault history can be reviewed to identify repeated overcurrent, overvoltage, undervoltage, or thermal events. The motor and driven machinery should also be inspected because mechanical problems can place additional stress on the drive. For equipment operating continuously or in demanding industrial environments, preventive maintenance should be scheduled based on operating hours, environmental conditions, load profile, and the criticality of the application.