What makes the Schneider Electric ATV930D55N4 suitable for oil and gas duty?

The Schneider Electric ATV930D55N4 is a three-phase variable speed drive from the Altivar Process ATV930 series, rated 55 kW (75 HP) in normal duty and 45 kW (60 HP) in heavy duty. It accepts a 380...480 V three-phase supply and includes a built-in dynamic brake transistor for controlled deceleration. This dual rating lets one frame serve both continuous pumping and high-overload applications.

Key features and technical specifications

• Supply voltage: 380...480 V three-phase (-15%/+10%), 50/60 Hz.
• Normal duty power: 55 kW (75 HP), overload up to 120% for 60 s.
• Heavy duty power: 45 kW (60 HP), overload up to 150% for 60 s.
• Output frequency: 0.1...599 Hz.
• Operating temperature: -15 to +50 °C standard, derating up to 60 °C.
• Storage temperature: -40 to +70 °C.
• Relative humidity: 5 to 95% non-condensing.
• Protection rating: IP21 / UL Type 1.
• Integrated safety: 1 STO function, SIL3 / Cat. PL e.
• Braking: Built-in dynamic brake transistor; external resistor required (2.5 Ω minimum).

The wide operating temperature range supports installation in harsh process areas. The built-in STO function provides a certified safe torque off path without external contactors.

How does This unit handle input power and environmental extremes?

The drive operates from a 380...480 V three-phase supply with tolerance of -15%/+10% at 50/60 Hz. Normal duty maximum input current is 97.2 A at 380 V and 84.2 A at 480 V. Heavy duty maximum input current is 81.4 A at 380 V and 71.8 A at 480 V. Apparent power is 70.0 kVA (ND) and 59.7 kVA (HD) at 380 V.

Environmental class is IEC 60721-3-3 class 3C3 / 3S3 / 3M3 (except frame size 7). The drive tolerates -15 to +50 °C standard, with derating up to 60 °C. Storage range is -40 to +70 °C. Humidity tolerance is 5 to 95% non-condensing. These ratings suit outdoor shelters and unconditioned process buildings.

Comparison with similar drive categories

• vs. single-rated drives: This unit carries both normal duty and heavy duty ratings, so one model can cover pump and fan loads as well as high-overload machinery.
• vs. drives without integrated braking: A built-in dynamic brake transistor simplifies braking resistor wiring and reduces panel space.
• vs. drives without integrated safety: The STO function achieves SIL3 / Cat. PL e without additional safety relays.
• vs. drives with limited I/O: 8 digital inputs, 3 analog inputs, 2 analog outputs, and 3 relay outputs are integrated, with up to 3 optional expansion modules.

Applications and use cases

Oil and gas operators deploy This unit on mission-critical pumps, compressors, and fans where process uptime matters. The dual rating supports both continuous duty and high-overload starts. Built-in EtherNet/IP and Modbus TCP ports enable direct connection to plant control networks. The IP21 enclosure suits indoor mounting in pump houses and process skids. For remote wellsites, the wide temperature range and 3C3 environmental class provide field-proven resilience.

Installation and setup guidance

Mount the drive vertically with 100 mm clearance above and below and 10 mm in front. Terminal tightening torque for frame 5 power terminals is 25 N·m. Minimum air flow required is 295 m3/h. For braking applications, use an external resistor of at least 2.5 Ω. Altitude derating applies above 1000 m: derate nominal current by 1% per additional 100 m up to 3000 m. These steps help maintain reliable operation in demanding environments.

Integration and communication

The drive includes one Ethernet dual-port switch (RJ45) and one Modbus serial port (RJ45). EtherNet/IP and Modbus TCP protocols are built in. A single option slot accepts fieldbus modules such as PROFINET, PROFIBUS DP V1, CANopen, DeviceNet, EtherCAT, or POWERLINK. Cybersecurity is Achilles Level 2 certified. Integration note: wiring into these networks may require an external gateway or connection module; confirm cables and gateways with PetroPartsOnline.

Maintenance and reliability

Periodic inspection of cooling fans and air filters is recommended. The drive's power dissipation is 1228 W in normal duty and 919 W in heavy duty, so cabinet ventilation must be adequate. The IP21 protection rating limits dust ingress but not liquid ingress. In oil and gas environments, check terminal torque and resistor connections during scheduled shutdowns. Following these practices supports reliability you can depend on.

Frequently asked questions

What is This unit?

This unit is a Schneider Electric variable speed drive rated 55 kW normal duty and 45 kW heavy duty for 380...480 V three-phase supply. It is part of the Altivar Process ATV930 series.

Can This unit operate at high ambient temperatures?

This unit operates from -15 to +50 °C standard, with derating up to 60 °C. Storage temperature range is -40 to +70 °C. Verify derating requirements for your installation.

What safety function does This unit include?

This unit includes one STO (Safe Torque Off) function rated SIL3 / Cat. PL e per IEC 61508 and ISO 13849-1. Two dedicated safety inputs are provided.

Does This unit have built-in communication ports?

Yes, This unit has one Ethernet dual-port switch and one Modbus serial port. EtherNet/IP and Modbus TCP protocols are supported. An option slot accepts additional fieldbus modules.

What braking resistor is required for This unit?

An external braking resistor with a minimum resistance of 2.5 Ω is required. The drive includes a built-in dynamic brake transistor but no internal resistor.

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

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