Technical Specifications

FAQ

1. What is the Schneider ATV950D11N4E used for?
The ATV950D11N4E is an Altivar Process variable-speed drive designed for industrial motor control and process applications. It regulates the speed and torque of three-phase asynchronous and synchronous motors by controlling output voltage and frequency. Typical applications include pumps, fans, compressors, conveyors and other process machinery. Its IP55 enclosure and integrated communication functions make it suitable for industrial installations where environmental protection and automation-system integration are required.

2. What motor power does the ATV950D11N4E support?
The ATV950D11N4E supports motors up to 11 kW / 15 HP under Normal Duty conditions and 7.5 kW / 10 HP under Heavy Duty conditions. The appropriate rating should be selected according to the actual motor current and load profile rather than motor power alone. Applications with frequent acceleration, high starting torque or sustained overload should be evaluated using the Heavy Duty rating to ensure sufficient current capacity.

3. What are the input and output current ratings of the ATV950D11N4E?
Under Normal Duty, the line current is approximately 19.8 A at 380 V and 17 A at 480 V, while the continuous output current is 23.5 A at a 4 kHz switching frequency. Under Heavy Duty, the corresponding line currents are approximately 14.1 A at 380 V and 12.5 A at 480 V, with a continuous output current of 16.5 A. The drive can also provide short-term overload current, reaching approximately 28.2 A for 60 seconds in Normal Duty and 24.8 A for 60 seconds in Heavy Duty.

4. Which motor control modes are available on the ATV950D11N4E?
The drive supports constant-torque, variable-torque and optimized-torque control profiles for asynchronous motors. It also supports permanent-magnet synchronous motors. The appropriate control mode should be selected according to the mechanical characteristics of the application. Correct motor nameplate data, including rated voltage, current, frequency and power, should be entered during commissioning to establish proper motor control and reliable current regulation.

5. What should be checked if the ATV950D11N4E trips on overcurrent during acceleration?
First check the driven machine for excessive mechanical load, blockage, bearing problems or abnormal friction. A high-inertia load combined with a short acceleration time can also produce a large current demand. Verify the motor parameters programmed in the drive against the motor nameplate and inspect the motor cable for phase-to-phase faults, ground faults and loose connections. If the electrical and mechanical systems are normal, increasing the acceleration time can reduce the peak current demand and help determine whether the original acceleration profile was too aggressive.

6. How can the ATV950D11N4E communicate with a PLC?
The ATV950D11N4E supports Modbus TCP, Modbus Serial and EtherNet/IP for integration with industrial control systems. Additional communication options such as CANopen, PROFIBUS DP, PROFINET, DeviceNet and EtherCAT can be implemented using the appropriate communication modules. During commissioning, configure the communication address and network parameters, then assign the command source and frequency-reference source to the selected communication channel. PLC control should be tested for start/stop commands, speed reference, drive status, actual frequency, current and fault information.

7. What can cause an overload or thermal fault on the ATV950D11N4E?
Common causes include excessive motor load, continuous operation at high current, frequent acceleration and deceleration, inadequate cooling and unsuitable operating conditions. Check the mechanical load first and confirm that the motor current remains within the drive’s applicable rating. The cooling airflow and fan operation should also be inspected. Higher switching frequencies can increase power losses, so the applicable derating requirements should be considered when operating at elevated switching frequencies or ambient temperatures. The selected Normal Duty or Heavy Duty rating should also correspond to the actual machine load.

8. How should communication faults on the ATV950D11N4E be diagnosed?
Begin by checking the physical network connection, including Ethernet cables, connectors, switches and communication indicators. Then verify IP addressing, communication parameters and protocol settings between the PLC and drive. If the network is active but the drive does not respond to commands, check the command source and frequency-reference source configured in the drive. For intermittent communication problems, inspect cable routing, shielding and grounding, especially where communication cables run close to motor power cables or other high-current equipment. The drive diagnostic status and PLC communication data should be checked together to determine whether the problem is caused by wiring, network configuration or control-source settings.