Is Your Variable Speed Drive Ready for the Realities of Oil and Gas Duty?

Harsh environments, continuous operation, and fluctuating loads push drives to their limits. The Schneider Electric ATV930U55N4 answers that challenge as a three-phase variable speed drive rated for 380...480 V supplies. It delivers 5.5 kW (7.5 HP) in Normal Duty and 4 kW (5 HP) in Heavy Duty, with a built-in dynamic brake transistor for controlled stops.

This Altivar Process ATV930 model combines dual ND/HD ratings with integrated safety and communications. Consequently, it suits mission-critical oil and gas applications where reliability you can depend on is non-negotiable.

Key Features and Technical Specifications of the ATV930U55N4

This unit is engineered for flexibility and ruggedness. Its core specifications include:

• Input voltage: 380...480 V three-phase (-15%/+10%), 50/60 Hz.
• Motor power: 5.5 kW (7.5 HP) ND with 120% overload for 60 s; 4 kW (5 HP) HD with 150% overload for 60 s.
• Output frequency: 0.1...599 Hz.
• Operating temperature: -15 to +50 °C standard, with derating up to 60 °C.
• Protection rating: IP21/UL Type 1.
• Integrated safety: STO function, SIL3 / Cat. PL e per IEC 61508 and ISO 13849-1.
• Communications: Built-in Ethernet dual-port switch (RJ45) and Modbus serial port (RJ45).
• I/O: 8 digital inputs (24 V DC), 3 analog inputs, 2 analog outputs, and 3 relay outputs.

A distinctive feature is the built-in dynamic brake transistor. This chopper manages regenerative energy during rapid deceleration, reducing external component count. However, an external braking resistor is required; the minimum value is 23 Ω.

How Does This unit Perform in Demanding Oil and Gas Environments?

The drive's environmental resilience is a key asset. It operates from -15 to +50 °C as standard, with derating up to 60 °C for higher-temperature locations. The environmental class 3C3 / 3S3 / 3M3 (except frame size 7) confirms resistance to harsh conditions. Additionally, the IP21/UL Type 1 rating protects against dust and light moisture.

For oil and gas sites, these ratings mean fewer nuisance trips and longer service intervals. The dual ND/HD rating allows one drive to serve both normal and heavy-duty loads, simplifying spares inventory. Consequently, operators can standardize on a single model across varied pump, fan, and compressor duties.

Installation and Setup Guidelines

Proper installation ensures reliable operation. Mount the drive vertically with the specified clearances: 100 mm above and below, and 10 mm in front. These clearances support the required minimum air flow of 38 m3/h. The terminal tightening torque for frame 1-3 power terminals is 2.5 N·m.

For altitude, no derating is needed up to 1000 m. Above 1000 m, derate the nominal current by 1% per additional 100 m, up to 3000 m. Always follow the installation manual NHA80932 for wiring and safety instructions.

Integration with Control Systems

This unit integrates readily into modern automation architectures. Built-in EtherNet/IP and Modbus TCP protocols enable direct connection to PLCs and SCADA systems. The dual-port Ethernet switch supports daisy-chain topologies, reducing cabling.

For other fieldbuses, an option slot accepts modules for PROFINET, PROFIBUS DP V1, CANopen, DeviceNet, EtherCAT, or POWERLINK. Integration Note: Wiring into such networks may require an external gateway or connection module; confirm cables and gateways with the supplier.

The drive is Achilles Level 2 certified, addressing cybersecurity risks in connected operations.

Maintenance and Reliability

Regular inspection is essential for long service life. Check cooling fans and heatsink fins for dust buildup, especially in oily environments. Verify terminal connections annually. The drive's power dissipation is 200 W in ND and 137 W in HD, so ensure enclosure cooling matches the load.

Because This unit is built for demanding environments, it tolerates temperature swings and humidity from 5 to 95% non-condensing. Nevertheless, scheduled maintenance prevents unexpected downtime.

Frequently Asked Questions

What is the input voltage range of This unit?

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

Can This unit operate at high temperatures?

Yes, it operates from -15 to +50 °C standard, with derating up to 60 °C. Refer to the datasheet for derating curves.

What communication protocols are built into This unit?

It includes built-in EtherNet/IP and Modbus TCP via dual-port Ethernet, plus a Modbus serial port.

Is an external braking resistor required for This unit?

Yes, the built-in dynamic brake transistor requires an external resistor with a minimum value of 23 Ω.

What is the motor power rating of This unit?

It is dual-rated: 5.5 kW (7.5 HP) in Normal Duty and 4 kW (5 HP) in Heavy Duty.

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

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