When a 90 kW Pump Suddenly Trips: The ATV930D90N4 Solution

Picture a midstream pump station where a 90 kW crude oil transfer pump trips on overload during a cold-start surge. The root cause often lies in a drive that cannot sustain transient currents. The ATV930D90N4 from Schneider Electric addresses this with a dual ND/HD rating and a built-in braking unit. This three-phase variable speed drive operates on a 380...480 V supply and delivers 90 kW (125 HP) in normal duty or 75 kW (100 HP) in heavy duty, with 120% and 150% overload capability respectively for 60 seconds.

Engineered for harsh environments, This unit combines robust motor control with integrated safety and communications. Its field-proven design supports asynchronous, synchronous PM, and synchronous reluctance motors, making it a versatile choice for mission-critical operations.

Key Features and Technical Specifications

• Supply voltage: 380...480 V three-phase (-15%/+10%), 50/60 Hz, with input current up to 156.2 A at 380 V (ND).
• Power ratings: 90 kW (125 HP) normal duty with 120% overload for 60 s; 75 kW (100 HP) heavy duty with 150% overload for 60 s.
• Motor control: Open-loop sensorless flux vector and closed-loop with encoder for asynchronous motors; open-loop and closed-loop vector control for synchronous PM and synchronous reluctance motors.
• Integrated safety: 1 STO (Safe Torque Off) function, SIL3 / Cat. PL e per IEC 61508 and ISO 13849-1.
• Braking: Built-in dynamic brake transistor; external braking resistor required (minimum 2.5 Ω).
• I/O: 3 analog inputs, 8 digital inputs (24 V DC), 1 digital output (PTO), 2 analog outputs, 3 relay outputs, and 2 safety inputs for STO.
• Communication: Built-in Ethernet dual-port switch (RJ45) and Modbus serial port (RJ45); protocols include EtherNet/IP and Modbus TCP; one option slot for fieldbus modules.
• Operating temperature: -15 to +50 °C standard, derating up to 60 °C (wall-mount IP21, ≤160 kW).
• Protection rating: IP21 / UL Type 1.

The dual-rated design is particularly valuable in oil and gas, where processes may alternate between continuous pumping (normal duty) and intermittent high-torque operations (heavy duty). The built-in braking transistor allows for controlled deceleration of high-inertia loads without external chopper modules, simplifying panel design.

Applications and Use Cases in Oil & Gas

In upstream extraction, This unit can control electric submersible pumps (ESPs) and progressive cavity pumps, where variable speed is essential for managing fluctuating reservoir conditions. The drive's synchronous motor control supports permanent magnet motors often used in modern ESPs. Midstream, it is suited for pipeline booster pumps and compressors, where the 150% heavy-duty overload provides margin for start-up torque. Downstream, the drive can handle fans and pumps in refining processes, with the integrated STO function enabling safe maintenance shutdowns. Additionally, the drive's compliance with IEC 60721-3-3 class 3C3/3S3/3M3 ensures reliable operation in corrosive and humid environments typical of coastal or offshore facilities.

Installation and Setup Guidelines

Proper installation is critical for reliable performance. This unit requires a minimum clearance of 100 mm above and below and 10 mm in front for adequate airflow. The required minimum air flow is 295 m3/h. Power terminals on frame size 5 must be tightened to 25 N·m. The drive is designed for wall mounting with IP21 protection, and the EMC filter is category C3 for this model (above D45N4). For altitudes above 1000 m, derate the nominal current by 1% per additional 100 m up to 3000 m. Ensure the supply voltage matches the 380...480 V range and that the upstream protection is coordinated for a maximum prospective short-circuit current of 50 kA.

Reliability and Maintenance in Demanding Environments

Oil and gas installations expose equipment to temperature extremes, humidity, and corrosive atmospheres. This unit is rated for -15 to +50 °C standard operation, with derating up to 60 °C, and 5 to 95% non-condensing humidity. The environmental class 3C3/3S3/3M3 (except frame size 7) indicates resistance to corrosive gases and humidity. Regular maintenance should include checking fan operation, cleaning heatsinks, and verifying terminal torque. The built-in braking transistor reduces wear on mechanical brakes, extending service life. For mission-critical operations, consider the drive's Achilles Level 2 cybersecurity certification, which helps protect against network-based disruptions.

Compatibility and Integration with Control Systems

This unit integrates seamlessly into modern automation architectures. Built-in EtherNet/IP and Modbus TCP dual-port Ethernet allows daisy-chain connectivity, reducing cabling. The Modbus serial port supports RTU protocol. For other fieldbuses, an option slot accepts modules for PROFINET, PROFIBUS DP V1, CANopen, DeviceNet, EtherCAT, or POWERLINK. Up to three additional I/O modules can be added for extra analog, digital, or relay points. Integration Note: Wiring into fieldbus networks may require an external gateway or connection module; confirm cables and gateways with the supplier.

Frequently Asked Questions

What are the input voltage and power requirements for This unit?

This unit operates on a 380...480 V three-phase supply (-15%/+10%), 50/60 Hz. In normal duty, maximum input current is 156.2 A at 380 V; in heavy duty, it is 134.3 A at 380 V.

How does This unit handle overload conditions?

It provides 120% overload for 60 seconds in normal duty (90 kW) and 150% overload for 60 seconds in heavy duty (75 kW), supporting demanding starts and transient loads.

What is the operating temperature range of This unit?

The standard operating temperature range is -15 to +50 °C. Derating is required up to 60 °C for wall-mounted IP21 units up to 160 kW.

Can This unit be integrated into an EtherNet/IP network?

Yes, it has a built-in Ethernet dual-port switch supporting EtherNet/IP and Modbus TCP. For other protocols, an optional fieldbus module is required.

What safety functions are integrated into This unit?

It includes a Safe Torque Off (STO) function rated SIL3 / Cat. PL e per IEC 61508 and ISO 13849-1, with two dedicated safety inputs.

For parts suited to your application's requirements, contact PetroPartsOnline.

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