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- ATV950U55N4E
- Variable Speed Drive
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- 678 × 264 × 330 mm
- 10.7 kg
- Xiamen, China
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Product Overview
The Schneider Electric ATV950U55N4E is a 5.5 kW variable speed drive in the Altivar Process ATV900 series. It regulates the speed of synchronous and asynchronous motors used in industrial process equipment, including pumps, fans, conveyors, and production machinery. With a three-phase 380–480 V AC supply, the drive adjusts motor operation to match changing process requirements.
This model combines an integrated braking unit, a switch, and an IP55 enclosure. The braking function is useful in applications requiring controlled deceleration, while the integrated switch supports local electrical isolation arrangements. These features make the ATV950U55N4E relevant to installations where motor control, stopping behavior, and enclosure protection must be considered together.
The drive supports EtherNet/IP, Modbus TCP, and serial Modbus communication for integration with PLCs and supervisory control systems. Embedded power measurement and process-monitoring functions also help operators review operating conditions and investigate changes in energy consumption or machine performance.
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Schneider Electric |
| Model | ATV950U55N4E |
| Product Type | Variable Speed Drive |
| Product Series | Altivar Process ATV900 |
| Drive Range | ATV950 |
| Rated Motor Power | 5.5 kW for normal duty |
| Motor Power for Heavy Duty | 4.0 kW |
| Rated Supply Voltage | 380–480 V AC |
| Number of Supply Phases | 3 phases |
| Continuous Output Current | 12.7 A for normal duty at 4 kHz |
| Continuous Output Current, Heavy Duty | 9.3 A at 4 kHz |
| Compatible Motor Types | Synchronous motors; asynchronous motors |
| Enclosure Protection | IP55 |
| Integrated Braking Unit | Yes |
| Integrated Switch | Yes |
| Communication Protocols | EtherNet/IP, Modbus TCP, Modbus serial |
| Mounting Method | Wall mounting |
| Dimensions | 678 × 264 × 330 mm |
| Weight | 10.7 kg |
Product Features
Integrated braking unit: The built-in braking unit supports applications that require controlled deceleration. Depending on the load inertia and stopping frequency, an external braking resistor may be needed to dissipate braking energy.
Switch-equipped configuration: The E suffix identifies the switch-equipped version. This distinguishes the ATV950U55N4E from the ATV950U55N4, which has a similar power rating but a different configuration.
IP55 enclosure protection: The enclosure provides protection against dust ingress and water jets under the conditions specified by the IP rating. The installation environment, cable entries, temperature, and exposure to chemicals must still be considered.
Industrial communication support: EtherNet/IP, Modbus TCP, and serial Modbus allow the drive to exchange commands and operating information with compatible automation equipment.
Process and energy monitoring: Embedded measurement and monitoring functions help operators review power consumption, observe operating trends, and investigate unusual process behavior.
Different duty ratings: The 5.5 kW normal-duty rating and 4.0 kW heavy-duty rating allow the drive to be assessed against the actual motor load and operating profile.
Working Principle
The ATV950U55N4E converts incoming three-phase AC power into a controlled electrical output for the connected motor. By adjusting output voltage and frequency according to the selected motor-control method and operating reference, it regulates motor speed to meet the requirements of the driven equipment.
In a pumping system, for example, a PLC can adjust the speed reference according to changes in flow or pressure demand. The drive then changes motor speed rather than requiring the pump to operate continuously at a fixed speed. This allows motor operation to follow the process more closely.
During deceleration, the motor may return energy to the drive’s DC bus. The integrated braking unit manages braking energy when the application requires it, with a compatible braking resistor selected according to the required stopping time, load inertia, and duty cycle.
The drive can also exchange operating commands, status information, and fault data with the control system through a supported communication protocol. This allows motor speed regulation to work alongside machine sequencing, process supervision, and alarm handling.
Role in an Altivar Process ATV900 Control Architecture
The ATV950U55N4E occupies the motor-control layer between the electrical supply and the driven machine. It regulates motor output according to control commands while exchanging operating information with the PLC, HMI, and other connected automation devices.
| Control Layer | Role | Relationship to ATV950U55N4E |
|---|---|---|
| Electrical Power Distribution | Supplies and protects the drive circuit | Provides the correctly rated three-phase supply and upstream protection |
| Variable Speed Drive | Regulates motor speed and stopping behavior | Adjusts the electrical output according to configured commands and references |
| PLC or Process Controller | Executes machine sequences and process logic | Sends run commands and speed references through a supported interface |
| HMI or Operator Station | Displays operating values, alarms, and status | Presents drive-related information to operators through the control system |
| Industrial Communication Network | Exchanges commands and operating data | Uses EtherNet/IP, Modbus TCP, or serial Modbus according to the installation |
| Motor | Converts electrical power into mechanical motion | Operates at the commanded speed within configured limits |
| Driven Equipment | Performs the process task | Uses motor output for pumping, ventilation, conveying, or other machinery |
| Braking Circuit | Manages deceleration energy where required | Uses the integrated braking unit and a suitably selected resistor when applicable |
Industrial Applications
| Application | Typical Operating Requirement | Use of the ATV950U55N4E |
|---|---|---|
| Industrial Pumping | Flow and pressure vary with process demand | Adjusts pump motor speed to match the required operating point |
| Ventilation and Air Handling | Airflow changes with system load | Regulates fan speed according to the control reference |
| Conveyor Systems | Adjustable transport speed and controlled stopping | Coordinates motor speed with production requirements |
| Process Machinery | Motor operation follows changing production conditions | Receives speed references and operating commands from the controller |
| Material Handling | Controlled acceleration and deceleration | Supports adjustable motor operation for the specified load profile |
| Industrial Utility Systems | Continuous operation with process monitoring | Makes drive operating information available to the automation system |
| Automated Production Lines | Motor operation must coordinate with other equipment | Exchanges commands and status information with the wider control architecture |
Installation and Maintenance
- Verify the complete model reference: Confirm that the drive is ATV950U55N4E. The E suffix identifies the switch-equipped configuration and should not be confused with ATV950U55N4.
- Check the motor rating: Verify motor voltage, current, power, speed range, and duty requirements before commissioning. Select the normal-duty or heavy-duty rating according to the actual load profile.
- Confirm the supply conditions: Check that the three-phase supply is within the specified voltage range and that upstream electrical protection is suitable for the installation.
- Provide adequate mounting clearance: Install the unit on a suitable vertical surface and maintain the required clearances for ventilation, wiring access, and maintenance.
- Review the installation environment: Check ambient temperature, humidity, dust, water exposure, and corrosive conditions against the drive’s operating limits. IP55 protection does not make the unit suitable for every outdoor or washdown environment.
- Size upstream protection correctly: Select circuit protection and disconnecting arrangements according to the electrical installation requirements, applicable codes, and available fault current.
- Separate power and control wiring: Route motor cables away from sensitive signal and communication wiring where practicable. Follow appropriate grounding, shielding, and EMC practices.
- Inspect the motor connection: Verify terminal tightness, protective-earth continuity, cable sizing, and motor wiring before applying power.
- Configure the motor parameters: Enter the motor nameplate data and set acceleration, deceleration, speed limits, current limits, and control mode for the application.
- Check the braking arrangement: Determine whether the load and stopping requirements call for a braking resistor. Select a compatible resistor based on braking energy, stopping frequency, and thermal duty.
- Validate communication settings: Configure the selected EtherNet/IP, Modbus TCP, or serial Modbus connection, including addressing and communication parameters. Test commands, feedback values, and fault handling before releasing the machine for operation.
- Perform scheduled inspections: Check cooling passages, terminals, grounding, cables, enclosure seals, fault history, and operating conditions. Isolate the power supply and verify that the DC bus has discharged to a safe level before internal inspection.
Related Components
| Component | Purpose | Selection Considerations |
|---|---|---|
| Three-Phase AC Supply and Protection | Supplies the drive and protects the electrical circuit | Voltage, current capacity, fault level, and applicable electrical code |
| Synchronous or Asynchronous Motor | Converts electrical output into mechanical motion | Motor type, rated current, power, speed, and load profile |
| Braking Resistor | Dissipates braking energy when required | Resistance, power rating, duty cycle, and drive compatibility |
| PLC or Process Controller | Coordinates drive operation with the machine or process | Supported communication protocol and required control functions |
| HMI or Operator Panel | Presents operating status, alarms, and commands | Communication compatibility and required operator interface |
| Industrial Ethernet Switch | Connects networked automation equipment | Network topology, port count, and industrial environmental requirements |
| Motor and Control Cables | Carry drive output and control signals | Current capacity, cable length, shielding, installation method, and EMC requirements |
| EMC Accessories | Help address electromagnetic compatibility requirements | Supply characteristics, cable arrangement, and installation conditions |
Recommended Related Models
| Model | Product Description | Relationship to ATV950U55N4E |
|---|---|---|
| ATV950U40N4E | Altivar Process ATV950 Variable Speed Drive, 4.0 kW class | A lower-power option for applications with reduced motor demand; verify the required duty rating |
| ATV950U55N4 | Altivar Process ATV950 Variable Speed Drive, 5.5 kW class | Similar power class without the E-suffix switch-equipped configuration |
| ATV950U75N4E | Altivar Process ATV950 Variable Speed Drive, 7.5 kW class | A higher-power option for applications requiring more motor capacity |
| ATV950U40N4 | Altivar Process ATV950 Variable Speed Drive, 4.0 kW class | An alternative in the same drive range without the E-suffix switch configuration |
| ATV950U75N4 | Altivar Process ATV950 Variable Speed Drive, 7.5 kW class | A higher-power variant without the E-suffix switch configuration |
Selection should account for motor current, load profile, supply conditions, enclosure requirements, braking duty, communication needs, and the presence or absence of the integrated switch. Related models should not be treated as direct replacements without checking these requirements.
Key Advantages
- Combined motor control and switch configuration: Integrates variable-speed operation, a braking unit, and a switch-equipped arrangement in one enclosure.
- Process-oriented motor regulation: Supports adjustable operation for pumps, fans, conveyors, and industrial machinery.
- Industrial communication: Connects with compatible automation systems through EtherNet/IP, Modbus TCP, or serial Modbus.
- Operating data visibility: Embedded measurement and monitoring functions assist process supervision and troubleshooting.
- IP55 enclosure: Supports installation in a range of industrial environments when applied within the specified operating limits.
Technical FAQs
What is the difference between ATV950U55N4E and ATV950U55N4?
The ATV950U55N4E includes an integrated switch as well as a braking unit. The ATV950U55N4 has a similar power class but does not include the E-suffix switch-equipped configuration. The choice depends on the electrical arrangement and isolation requirements of the installation.
Can the ATV950U55N4E control synchronous and asynchronous motors?
The drive supports synchronous and asynchronous motor applications. The motor must be compatible with the selected control mode, and its nameplate information and operating parameters must be configured correctly.
Does the ATV950U55N4E include a braking resistor?
The model includes an integrated braking unit, but a braking resistor is a separate selection unless supplied as part of a specific package. Where resistor braking is required, select a compatible resistor based on stopping time, load inertia, and braking duty.
Which communication protocols can be used with the ATV950U55N4E?
The drive supports EtherNet/IP, Modbus TCP, and serial Modbus. The appropriate protocol and configuration depend on the PLC, network architecture, and control functions required by the application.