What Is the ATV930D75N4 Variable Speed Drive?

The ATV930D75N4 is a three-phase variable speed drive from Schneider Electric's Altivar Process ATV930 series. It is dual-rated at 75 kW (100 HP) normal duty and 55 kW (75 HP) heavy duty, with a 380...480 V three-phase supply and a built-in dynamic brake transistor.

Engineers specifying drives for oil and gas duty need a unit that tolerates wide temperature swings, maintains torque under transient overloads and integrates with plant networks. This unit addresses these requirements with a standard operating range of -15 to +50 °C, 120% normal duty overload for 60 s and dual Ethernet ports for EtherNet/IP and Modbus TCP.

Key Specifications at a Glance

• Supply voltage: 380...480 V three-phase (-15%/+10%), 50/60 Hz
• Normal duty power: 75 kW (100 HP), 120% overload for 60 s
• Heavy duty power: 55 kW (75 HP), 150% overload for 60 s
• Operating temperature: -15 to +50 °C standard, derating up to 60 °C
• Output frequency: 0.1...599 Hz
• Protection rating: IP21 / UL Type 1
• Integrated safety: STO function, SIL3 / Cat. PL e
• Communications: EtherNet/IP and Modbus TCP dual-port, Modbus serial

How the Dual ND/HD Rating Affects Sizing

This unit carries two current ratings so that one frame can serve different load profiles. In normal duty, maximum continuous output current is 145.0 A and transient current reaches 174.0 A for 60 s. In heavy duty, continuous output current is 106.0 A with 159.0 A transient for 60 s.

For oil and gas applications such as pipeline pumps or compressor auxiliaries, heavy duty sizing is often appropriate when the motor may see frequent starts or shock loads. Normal duty suits centrifugal fans and pumps where overloads are infrequent. The correct choice depends on the load curve and duty cycle of the driven equipment.

Built for Demanding Environments

Environmental tolerance is central to This unit design. The drive meets IEC 60721-3-3 class 3C3 / 3S3 / 3M3 for environmental classification, excluding frame size 7. Relative humidity of 5 to 95% non-condensing is permitted, and storage temperature extends from -40 to +70 °C.

These ratings matter where drives sit in unheated enclosures or near process heat. Above 50 °C, output current derates up to 60 °C. Altitude derating begins above 1000 m at 1% per additional 100 m, so sites at elevation should factor this into the selection. The IP21 / UL Type 1 protection rating suits wall-mounting inside a controlled electrical room or shelter.

I/O, Communications and Integration

The drive provides eight 24 V DC digital inputs with positive or negative logic, three analog inputs and two analog outputs configurable as 0...10 V or 0/4-20 mA. Three relay outputs and one assignable pulse train output are included. Up to three additional I/O modules can be added through the option slot.

Built-in Ethernet dual-port switch supports EtherNet/IP and Modbus TCP, while a separate Modbus serial port is available. One option slot accepts fieldbus modules such as PROFINET, PROFIBUS DP V1, CANopen, DeviceNet, EtherCAT or POWERLINK. The drive holds Achilles Level 2 certification for cybersecurity.

Integration Note: Wiring into fieldbus networks may require an external gateway or connection module. Confirm cable and gateway requirements with PetroPartsOnline before commissioning.

Safety and Braking Considerations

The integrated Safe Torque Off function is rated SIL3 / Cat. PL e per IEC 61508 and ISO 13849-1, with two dedicated safety inputs. This supports machine designs that require a certified stop function without external contactors.

The built-in dynamic brake transistor requires an external braking resistor with a minimum resistance of 2.5 Ω. Installers should verify resistor rating against the application's deceleration profile. Terminal tightening torque for frame 5 power terminals is 25 N·m, and clearance of 100 mm above and below plus 10 mm in front should be observed.

Installation and Maintenance Guidance

Mount the drive vertically with the specified clearances to maintain airflow. Required minimum air flow is 295 m3/h, and total power dissipation is 1785 W in normal duty or 1143 W in heavy duty at nominal load. Plan enclosure ventilation accordingly.

Inspect cooling paths and connections periodically, particularly in dusty or humid plant areas. Verify that the braking resistor and its wiring remain secure. Follow the manufacturer's safety manual for all STO-related maintenance. These practices support reliability you can depend on in mission-critical operations.

Frequently Asked Questions

What is the supply voltage range of This unit?

This unit accepts 380...480 V three-phase input with -15%/+10% tolerance at 50/60 Hz.

Can This unit operate above 50 °C?

Yes, the drive derates up to 60 °C. Standard operating temperature is -15 to +50 °C, and output current must be reduced above 50 °C.

Does This unit include a braking resistor?

No. The drive includes a built-in dynamic brake transistor, but an external braking resistor with a minimum of 2.5 Ω is required.

Which communication protocols are built into This unit?

EtherNet/IP and Modbus TCP are built in through a dual-port Ethernet switch. Modbus RTU is available on the serial port, and fieldbus modules can be added via the option slot.

What is the difference between normal duty and heavy duty ratings?

Normal duty provides 75 kW with 120% overload for 60 s. Heavy duty provides 55 kW with 150% overload for 60 s, suiting higher starting torque or shock loads.

Contact PetroPartsOnline for parts suited to your application's requirements.

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