Schneider Electric ATV930D18N4 is a three-phase variable speed drive from the Altivar Process ATV930 series, rated 18.5 kW (25 HP) in normal duty and 15 kW (20 HP) in heavy duty on a 380...480 V supply. It combines a built-in dynamic brake transistor, dual-port Ethernet, and integrated Safe Torque Off (STO) safety in a single wall-mount package.

Why the ATV930D18N4 Suits Demanding Process Duty

Industrial drives have moved from simple speed control to become mission-critical assets on pumps, compressors, and mixers. This unit reflects that shift. Its dual ND/HD rating lets engineers size one drive for two load profiles, while the built-in braking chopper handles regenerative energy without extra cabinet hardware. For oil and gas sites, this means fewer components to source and maintain.

Key Specifications at a Glance

• Supply voltage: 380...480 V three-phase (-15%/+10%), 50/60 Hz
• Motor power (ND): 18.5 kW (25 HP), 120% overload for 60 s
• Motor power (HD): 15 kW (20 HP), 150% overload for 60 s
• Output frequency: 0.1...599 Hz
• Operating temperature: -15 to +50 °C standard, derating up to 60 °C
• Protection rating: IP21 / UL Type 1
• Dimensions (H×W×D): 545.9 x 211 x 235 mm
• Weight: 14.200 kg (31.306 lb)

The 18.5 kW normal-duty rating pairs with a maximum continuous output current of 39.2 A, while the heavy-duty mode delivers 31.7 A continuous with 47.6 A transient for 60 s. These figures help engineers match the drive to motor nameplate data without oversizing.

How Does This unit Handle Heat and Input Power?

Thermal management is central to drive reliability in process plants. This unit operates from -15 to +50 °C as standard, with derating permitted up to 60 °C for wall-mount IP21 units. Power dissipation is 616 W in normal duty and 445 W in heavy duty at nominal load, and the required minimum air flow is 215 m3/h. Installation clearance of 100 mm above and below and 10 mm in front supports that airflow.

On the input side, the drive accepts 380...480 V three-phase with -15%/+10% tolerance. Normal-duty maximum input current is 33.4 A at 380 V and 28.9 A at 480 V; heavy-duty input current is 27.7 A at 380 V and 24.4 A at 480 V. The SCCR rating reaches 50 kA maximum, and an EMC filter is integrated (Category C2 for this model).

Integrated I/O and Communication

The drive includes 3 analog inputs, 8 digital inputs at 24 V DC, 2 analog outputs, 1 digital output configurable as pulse train, and 3 relay outputs. Two dedicated inputs support the STO function, rated SIL3 / Cat. PL e per IEC 61508 and ISO 13849-1. Built-in communication covers a dual-port Ethernet switch and a Modbus serial port, with EtherNet/IP and Modbus TCP protocols available. One option slot accepts fieldbus modules such as PROFINET, PROFIBUS DP V1, CANopen, DeviceNet, EtherCAT, or POWERLINK. Up to 3 additional I/O modules can be added.

For cybersecurity, the drive is Achilles Level 2 certified, which matters when drives connect to plant networks.

Installation and Maintenance Guidance

Mount the drive vertically with the specified clearances and torque power terminals to 2.5 N·m (Frame 1-3). The built-in braking transistor requires an external braking resistor with a minimum of 15 Ω. During commissioning, verify motor data and set the switching frequency according to load; nominal is 4 kHz for this frame size, with automatic derating above that.

Routine checks should include cabinet filter condition, terminal tightness, and airflow. In oil and gas environments, inspect for dust and humidity ingress, since the environmental class is IEC 60721-3-3 3C3 / 3S3 / 3M3 (except frame size 7). Following the installation manual NHA80932 for altitude derating (1% per 100 m above 1000 m) protects the drive in high-elevation sites.

Where This unit Fits in Oil and Gas Operations

This drive is suited to mission-critical process equipment: pipeline pumps, compressor auxiliaries, and mixing systems. Its dual rating allows one spare to cover both normal and heavy-duty duties, simplifying spare-parts strategy. The integrated STO function supports safe stopping without main contactor wear, and the coated boards and environmental class help resist corrosive atmospheres. For projects requiring reliable sourcing, PetroPartsOnline can confirm availability and configuration.

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

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